diff --git a/package.json b/package.json index e0b5082..2443a32 100644 --- a/package.json +++ b/package.json @@ -1,11 +1,13 @@ { "name": "metona-ollama-desktop", - "version": "1.1.0", - "description": "Metona Ollama - 桌面端 AI 聊天客户端", - "main": "electron/main.js", + "version": "2.0.0", + "description": "Metona Ollama - TypeScript + Electron 桌面 AI 聊天客户端", + "main": "dist/main/main.js", "author": "thzxx", "license": "MIT", "scripts": { + "dev": "vite && electron .", + "build": "tsc && vite build", "start": "electron . --no-sandbox", "pack": "electron-builder --dir", "dist": "electron-builder --win", @@ -19,27 +21,19 @@ "output": "release" }, "files": [ - "electron/**/*", - "js/**/*", - "css/**/*", + "dist/**/*", "assets/**/*", - "index.html", - "manifest.json", "!node_modules/**/*" ], "win": { "target": [ { "target": "nsis", - "arch": [ - "x64" - ] + "arch": ["x64"] }, { "target": "portable", - "arch": [ - "x64" - ] + "arch": ["x64"] } ], "icon": "assets/icons/llama.ico", @@ -60,7 +54,10 @@ } }, "devDependencies": { + "@types/node": "^20.17.0", "electron": "^33.4.11", - "electron-builder": "^25.0.0" + "electron-builder": "^25.1.8", + "typescript": "^5.7.0", + "vite": "^5.4.0" } } diff --git a/src/main/ipc.ts b/src/main/ipc.ts new file mode 100644 index 0000000..3739d6c --- /dev/null +++ b/src/main/ipc.ts @@ -0,0 +1,72 @@ +/** + * Metona Ollama Desktop - IPC 处理器 + */ + +import { ipcMain, dialog, shell } from 'electron'; +import * as fs from 'fs'; +import * as path from 'path'; +import { mainWindow } from './main.js'; +import { showNotification } from './utils.js'; + +export function setupIPC(): void { + ipcMain.handle('dialog:openFile', async (_, options?: { filters?: Array<{ name: string; extensions: string[] }> }) => { + const result = await dialog.showOpenDialog(mainWindow!, { + properties: ['openFile', 'multiSelections'], + filters: options?.filters || [{ name: '所有文件', extensions: ['*'] }] + }); + if (result.canceled) return null; + return result.filePaths; + }); + + ipcMain.handle('dialog:saveFile', async (_, options?: { defaultPath?: string; filters?: Array<{ name: string; extensions: string[] }> }) => { + const result = await dialog.showSaveDialog(mainWindow!, { + defaultPath: options?.defaultPath || 'export', + filters: options?.filters || [{ name: '所有文件', extensions: ['*'] }] + }); + if (result.canceled) return null; + return result.filePath; + }); + + ipcMain.handle('fs:readFile', async (_, filePath: string) => { + try { + const content = await fs.promises.readFile(filePath, 'utf-8'); + return { success: true, content, name: path.basename(filePath) }; + } catch (err) { + return { success: false, error: (err as Error).message }; + } + }); + + ipcMain.handle('fs:writeFile', async (_, filePath: string, content: string) => { + try { + await fs.promises.writeFile(filePath, content, 'utf-8'); + return { success: true }; + } catch (err) { + return { success: false, error: (err as Error).message }; + } + }); + + ipcMain.handle('notify', (_: unknown, title: string, body: string) => { + showNotification(title, body); + }); + + ipcMain.handle('app:info', () => ({ + version: require('electron').app.getVersion(), + platform: process.platform, + arch: process.arch, + electronVersion: process.versions.electron, + userDataPath: require('electron').app.getPath('userData') + })); + + ipcMain.handle('window:minimize', () => mainWindow?.minimize()); + ipcMain.handle('window:maximize', () => { + if (mainWindow?.isMaximized()) mainWindow.unmaximize(); + else mainWindow?.maximize(); + }); + ipcMain.handle('window:close', () => mainWindow?.close()); + + ipcMain.handle('shell:openExternal', (_, url: string) => { + if (url.startsWith('http://') || url.startsWith('https://') || url.startsWith('mailto:')) { + shell.openExternal(url); + } + }); +} diff --git a/src/main/main.ts b/src/main/main.ts new file mode 100644 index 0000000..8b5460a --- /dev/null +++ b/src/main/main.ts @@ -0,0 +1,159 @@ +/** + * Metona Ollama Desktop - 主进程入口 + */ + +import { app, BrowserWindow } from 'electron'; +import * as path from 'path'; +import * as fs from 'fs'; +import { setupIPC } from './ipc.js'; +import { createTray } from './tray.js'; +import { createMenu } from './menu.js'; +import { showNotification } from './utils.js'; + +const APP_NAME = 'Metona Ollama'; +const ICON_PATH = path.join(__dirname, '..', '..', 'assets', 'icons', 'llama.png'); +const ICO_PATH = path.join(__dirname, '..', '..', 'assets', 'icons', 'llama.ico'); +const IS_DEV = !app.isPackaged; + +export let mainWindow: BrowserWindow | null = null; +export let isQuitting = false; + +export function getIconPath(): string { + return process.platform === 'win32' ? ICO_PATH : ICON_PATH; +} + +function createMainWindow(): BrowserWindow { + const userDataPath = app.getPath('userData'); + const configPath = path.join(userDataPath, 'window-state.json'); + let windowState = { width: 1200, height: 800, x: undefined as number | undefined, y: undefined as number | undefined, maximized: false }; + + try { + if (fs.existsSync(configPath)) { + windowState = JSON.parse(fs.readFileSync(configPath, 'utf-8')); + } + } catch { /* use defaults */ } + + mainWindow = new BrowserWindow({ + width: windowState.width || 1200, + height: windowState.height || 800, + x: windowState.x, + y: windowState.y, + minWidth: 800, + minHeight: 600, + icon: process.platform === 'win32' ? ICO_PATH : ICON_PATH, + title: APP_NAME, + backgroundColor: '#202020', + show: false, + autoHideMenuBar: true, + menuBarVisible: false, + webPreferences: { + preload: path.join(__dirname, 'preload.js'), + contextIsolation: true, + nodeIntegration: false, + sandbox: false, + webSecurity: false, + allowRunningInsecureContent: false + } + }); + + mainWindow.loadFile(path.join(__dirname, '..', '..', 'index.html')); + mainWindow.setMenuBarVisibility(false); + + mainWindow.once('ready-to-show', () => { + if (windowState.maximized) { + mainWindow!.maximize(); + } + mainWindow!.show(); + }); + + const saveWindowState = (): void => { + if (!mainWindow || mainWindow.isMaximized() || mainWindow.isMinimized()) return; + const bounds = mainWindow.getBounds(); + try { + fs.writeFileSync(configPath, JSON.stringify(bounds)); + } catch { /* ignore */ } + }; + + mainWindow.on('resize', saveWindowState); + mainWindow.on('move', saveWindowState); + + mainWindow.on('maximize', () => { + try { + const state = JSON.parse(fs.readFileSync(configPath, 'utf-8')); + state.maximized = true; + fs.writeFileSync(configPath, JSON.stringify(state)); + } catch { /* ignore */ } + }); + + mainWindow.on('unmaximize', () => { + try { + const state = JSON.parse(fs.readFileSync(configPath, 'utf-8')); + state.maximized = false; + fs.writeFileSync(configPath, JSON.stringify(state)); + } catch { /* ignore */ } + }); + + mainWindow.on('close', (e) => { + if (!isQuitting) { + e.preventDefault(); + mainWindow!.hide(); + if (!(global as Record)._trayHintShown) { + (global as Record)._trayHintShown = true; + showNotification('Metona 已最小化到系统托盘', '点击托盘图标可重新打开'); + } + } + }); + + mainWindow.on('closed', () => { + mainWindow = null; + }); + + mainWindow.webContents.setWindowOpenHandler(({ url }) => { + if (url.startsWith('http://') || url.startsWith('https://')) { + const { shell } = require('electron'); + shell.openExternal(url); + return { action: 'deny' as const }; + } + return { action: 'allow' as const }; + }); + + return mainWindow; +} + +// ── 单实例锁 ── +const gotTheLock = app.requestSingleInstanceLock(); +if (!gotTheLock) { + app.quit(); +} else { + app.on('second-instance', () => { + if (mainWindow) { + if (mainWindow.isMinimized()) mainWindow.restore(); + mainWindow.focus(); + } + }); +} + +app.whenReady().then(() => { + setupIPC(); + createMainWindow(); + createTray(); + createMenu(); + + app.on('activate', () => { + if (BrowserWindow.getAllWindows().length === 0) { + createMainWindow(); + } else if (mainWindow) { + mainWindow.show(); + } + }); +}); + +app.on('window-all-closed', () => { + if (process.platform !== 'darwin') { + // keep running with tray + } +}); + +app.on('before-quit', () => { + isQuitting = true; +}); diff --git a/src/main/menu.ts b/src/main/menu.ts new file mode 100644 index 0000000..6d59670 --- /dev/null +++ b/src/main/menu.ts @@ -0,0 +1,131 @@ +/** + * Metona Ollama Desktop - 原生菜单 + */ + +import { Menu, dialog, shell } from 'electron'; +import { mainWindow, isQuitting, getIconPath } from './main.js'; + +export function createMenu(): void { + const template: Electron.MenuItemConstructorOptions[] = [ + { + label: '文件', + submenu: [ + { + label: '新建会话', + accelerator: 'Ctrl+N', + click: () => mainWindow?.webContents.send('menu-action', 'new-chat') + }, + { type: 'separator' }, + { + label: '导入会话', + click: () => mainWindow?.webContents.send('menu-action', 'import') + }, + { + label: '导出会话', + accelerator: 'Ctrl+Shift+E', + click: () => mainWindow?.webContents.send('menu-action', 'export') + }, + { type: 'separator' }, + { + label: '退出', + accelerator: 'Ctrl+Q', + click: () => { + const { app } = require('electron'); + (require('./main.js') as Record).isQuitting = true; + app.quit(); + } + } + ] + }, + { + label: '编辑', + submenu: [ + { role: 'undo', label: '撤销' }, + { role: 'redo', label: '重做' }, + { type: 'separator' }, + { role: 'cut', label: '剪切' }, + { role: 'copy', label: '复制' }, + { role: 'paste', label: '粘贴' }, + { role: 'selectAll', label: '全选' } + ] + }, + { + label: '视图', + submenu: [ + { role: 'reload', label: '刷新' }, + { role: 'forceReload', label: '强制刷新' }, + { type: 'separator' }, + { role: 'zoomIn', label: '放大' }, + { role: 'zoomOut', label: '缩小' }, + { role: 'resetZoom', label: '重置缩放' }, + { type: 'separator' }, + { role: 'togglefullscreen', label: '全屏' } + ] + }, + { + label: '窗口', + submenu: [ + { role: 'minimize', label: '最小化' }, + { + label: '最大化/还原', + click: () => { + if (mainWindow?.isMaximized()) mainWindow.unmaximize(); + else mainWindow?.maximize(); + } + }, + { type: 'separator' }, + { + label: '置顶', + type: 'checkbox', + checked: false, + click: (menuItem: Electron.MenuItem) => { + mainWindow?.setAlwaysOnTop(menuItem.checked); + } + } + ] + }, + { + label: '帮助', + submenu: [ + { + label: '使用帮助', + click: () => mainWindow?.webContents.send('menu-action', 'help') + }, + { type: 'separator' }, + { + label: '关于 Ollama', + click: () => shell.openExternal('https://ollama.com') + }, + { + label: '关于 Metona', + click: () => { + dialog.showMessageBox(mainWindow!, { + type: 'info', + title: '关于 Metona Ollama', + message: 'Metona Ollama Desktop v2.0.0', + detail: 'TypeScript + Electron Ollama AI 聊天客户端\n\nhttps://gitee.com/thzxx/metona-ollama', + icon: getIconPath() + }); + } + } + ] + } + ]; + + const IS_DEV = !require('electron').app.isPackaged; + if (IS_DEV) { + template.push({ + label: 'Dev', + submenu: [ + { + label: '切换开发者工具', + accelerator: 'F12', + click: () => mainWindow?.webContents.toggleDevTools() + } + ] + }); + } + + const menu = Menu.buildFromTemplate(template); + Menu.setApplicationMenu(menu); +} diff --git a/src/main/preload.ts b/src/main/preload.ts new file mode 100644 index 0000000..0c4dd54 --- /dev/null +++ b/src/main/preload.ts @@ -0,0 +1,34 @@ +/** + * Metona Ollama Desktop - Preload 脚本 + */ + +import { contextBridge, ipcRenderer } from 'electron'; + +contextBridge.exposeInMainWorld('metonaDesktop', { + isDesktop: true, + info: () => ipcRenderer.invoke('app:info'), + dialog: { + openFile: (filters?: unknown) => ipcRenderer.invoke('dialog:openFile', { filters }), + saveFile: (options?: unknown) => ipcRenderer.invoke('dialog:saveFile', options) + }, + fs: { + readFile: (filePath: string) => ipcRenderer.invoke('fs:readFile', filePath), + writeFile: (filePath: string, content: string) => ipcRenderer.invoke('fs:writeFile', filePath, content) + }, + notify: (title: string, body: string) => ipcRenderer.invoke('notify', title, body), + window: { + minimize: () => ipcRenderer.invoke('window:minimize'), + maximize: () => ipcRenderer.invoke('window:maximize'), + close: () => ipcRenderer.invoke('window:close') + }, + openExternal: (url: string) => ipcRenderer.invoke('shell:openExternal', url), + onMenuAction: (callback: (action: string) => void) => { + ipcRenderer.on('menu-action', (_: unknown, action: string) => callback(action)); + }, + onTrayAction: (callback: (action: string) => void) => { + ipcRenderer.on('tray-action', (_: unknown, action: string) => callback(action)); + }, + removeAllListeners: (channel: string) => { + ipcRenderer.removeAllListeners(channel); + } +}); diff --git a/src/main/tray.ts b/src/main/tray.ts new file mode 100644 index 0000000..a7d911f --- /dev/null +++ b/src/main/tray.ts @@ -0,0 +1,49 @@ +/** + * Metona Ollama Desktop - 系统托盘 + */ + +import { Tray, Menu, nativeImage } from 'electron'; +import { mainWindow, isQuitting, getIconPath } from './main.js'; + +let tray: Tray | null = null; + +export function createTray(): void { + const icon = nativeImage.createFromPath(getIconPath()); + tray = new Tray(icon.resize({ width: 16, height: 16 })); + + const contextMenu = Menu.buildFromTemplate([ + { + label: '打开 Metona', + click: () => { + mainWindow?.show(); + mainWindow?.focus(); + } + }, + { type: 'separator' }, + { + label: '新建会话', + click: () => { + mainWindow?.show(); + mainWindow?.focus(); + mainWindow?.webContents.send('tray-action', 'new-chat'); + } + }, + { type: 'separator' }, + { + label: '退出', + click: () => { + const main = require('./main.js'); + main.isQuitting = true; + require('electron').app.quit(); + } + } + ]); + + tray.setToolTip('Metona Ollama'); + tray.setContextMenu(contextMenu); + + tray.on('double-click', () => { + mainWindow?.show(); + mainWindow?.focus(); + }); +} diff --git a/src/main/utils.ts b/src/main/utils.ts new file mode 100644 index 0000000..3e004ab --- /dev/null +++ b/src/main/utils.ts @@ -0,0 +1,14 @@ +/** + * Metona Ollama Desktop - 主进程工具函数 + */ + +import { Notification } from 'electron'; +import * as path from 'path'; + +const ICON_PATH = path.join(__dirname, '..', '..', 'assets', 'icons', 'llama.png'); + +export function showNotification(title: string, body: string): void { + if (Notification.isSupported()) { + new Notification({ title, body, icon: ICON_PATH }).show(); + } +} diff --git a/src/renderer/api/ollama.ts b/src/renderer/api/ollama.ts new file mode 100644 index 0000000..0806c38 --- /dev/null +++ b/src/renderer/api/ollama.ts @@ -0,0 +1,136 @@ +/** + * Ollama API 客户端封装 + */ + +import type { + OllamaChatParams, OllamaStreamChunk, OllamaModelsResponse, + OllamaPsResponse, OllamaVersionResponse, OllamaModelDetail, + OllamaEmbedResponse +} from '../types.js'; + +export class OllamaAPI { + baseUrl: string; + + constructor(baseUrl = 'http://127.0.0.1:11434') { + this.baseUrl = baseUrl.replace(/\/+$/, ''); + } + + private async _request(path: string, options: RequestInit = {}): Promise { + const url = `${this.baseUrl}${path}`; + const config: RequestInit = { + ...options, + headers: { 'Content-Type': 'application/json', ...(options.headers as Record || {}) } + }; + const response = await fetch(url, config); + if (!response.ok) { + const errorBody = await response.text().catch(() => ''); + throw new Error(`Ollama API 错误 ${response.status}: ${errorBody || response.statusText}`); + } + return response; + } + + private async _json(path: string, body: unknown = null): Promise { + const options: RequestInit = body ? { method: 'POST', body: JSON.stringify(body) } : {}; + const response = await this._request(path, options); + return response.json() as Promise; + } + + async listModels(): Promise { + return this._json('/api/tags'); + } + + async psModels(): Promise { + return this._json('/api/ps'); + } + + async getVersion(): Promise { + return this._json('/api/version'); + } + + async showModel(model: string): Promise { + return this._json('/api/show', { model }); + } + + async chat(params: Omit): Promise { + const body: Record = { + model: params.model, + messages: params.messages, + stream: false, + }; + if (params.think !== undefined) body.think = params.think; + if (params.system) body.system = params.system; + if (params.keep_alive !== undefined) body.keep_alive = params.keep_alive; + if (params.options) body.options = params.options; + return this._json('/api/chat', body); + } + + async chatStream( + params: OllamaChatParams, + onChunk: (chunk: OllamaStreamChunk) => void, + abortController?: AbortController + ): Promise { + const body: Record = { + model: params.model, + messages: params.messages, + stream: true, + }; + if (params.think !== undefined) body.think = params.think; + if (params.system) body.system = params.system; + if (params.keep_alive !== undefined) body.keep_alive = params.keep_alive; + if (params.options) body.options = params.options; + + const fetchOptions: RequestInit = { + method: 'POST', + body: JSON.stringify(body) + }; + + if (abortController) { + fetchOptions.signal = abortController.signal; + } + + const response = await this._request('/api/chat', fetchOptions); + const reader = response.body!.getReader(); + const decoder = new TextDecoder(); + let buffer = ''; + + if (abortController) { + abortController.signal.addEventListener('abort', () => { + reader.cancel(); + }, { once: true }); + } + + while (true) { + const { done, value } = await reader.read(); + if (done) break; + + buffer += decoder.decode(value, { stream: true }); + const lines = buffer.split('\n'); + buffer = lines.pop() || ''; + + for (const line of lines) { + if (!line.trim()) continue; + try { + const chunk: OllamaStreamChunk = JSON.parse(line); + if (onChunk) onChunk(chunk); + if (chunk.done) { + reader.cancel(); + return; + } + } catch (err) { + console.warn('[OllamaAPI] 流式数据解析警告:', (err as Error).message); + } + } + } + + if (buffer.trim()) { + try { + const chunk: OllamaStreamChunk = JSON.parse(buffer); + if (onChunk) onChunk(chunk); + } catch { /* ignore */ } + } + } + + async embed(model: string, input: string): Promise { + return this._json('/api/embed', { model, input }); + } +} diff --git a/src/renderer/components/chat-area.ts b/src/renderer/components/chat-area.ts new file mode 100644 index 0000000..533d8ef --- /dev/null +++ b/src/renderer/components/chat-area.ts @@ -0,0 +1,331 @@ +/** + * ChatArea - 聊天区域组件 + */ + +import { state, KEYS } from '../state/state.js'; +import { marked } from '../utils/marked-config.js'; +import { escapeHtml, formatTime, downloadFile } from '../utils/utils.js'; +import type { ChatSession, ChatMessage } from '../types.js'; + +function getFileIcon(filename: string): string { + const name = filename.toLowerCase(); + if (name === 'dockerfile') return '🐳'; + if (name === 'makefile' || name === 'gnumakefile') return '🔨'; + const ext = filename.split('.').pop()?.toLowerCase() || ''; + const map: Record = { + py: '🐍', js: '💛', ts: '🔷', tsx: '⚛️', jsx: '⚛️', + java: '☕', go: '🐹', rs: '🦀', rb: '💎', php: '🐘', + cpp: '⚙️', c: '⚙️', sh: '🐚', html: '🌐', css: '🎨', + json: '📋', yaml: '📋', yml: '📋', md: '📝', txt: '📄', + sql: '🗃️', xml: '📰', csv: '📊', diff: '🔀', + }; + return map[ext] || '📄'; +} + +let chatAreaEl: HTMLElement; +let messagesContainerEl: HTMLElement; +let emptyStateEl: HTMLElement; +let scrollBtnEl: HTMLElement; +let autoScroll = true; +let currentPlaceholder: HTMLElement | null = null; + +export function initChatArea(): void { + chatAreaEl = document.querySelector('#chatArea')!; + messagesContainerEl = document.querySelector('#messagesContainer')!; + emptyStateEl = document.querySelector('#emptyState')!; + scrollBtnEl = document.querySelector('#scrollToBottom')!; + + chatAreaEl.addEventListener('scroll', () => { + const atBottom = isAtBottom(); + if (atBottom) { + autoScroll = true; + scrollBtnEl.style.display = 'none'; + } else { + autoScroll = false; + scrollBtnEl.style.display = ''; + } + }); + + scrollBtnEl.addEventListener('click', () => { + autoScroll = true; + scrollBtnEl.style.display = 'none'; + chatAreaEl.scrollTo({ top: chatAreaEl.scrollHeight, behavior: 'smooth' }); + }); +} + +function isAtBottom(): boolean { + return chatAreaEl.scrollHeight - chatAreaEl.scrollTop - chatAreaEl.clientHeight < 60; +} + +export function safeMarkdown(text: unknown): string { + if (!text && text !== 0) return ''; + const str = typeof text === 'string' ? text : String(text); + if (!str) return ''; + try { + return marked(str); + } catch { + return escapeHtml(str); + } +} + +export function scrollToBottom(): void { + if (!autoScroll) return; + requestAnimationFrame(() => { + chatAreaEl.scrollTop = chatAreaEl.scrollHeight; + }); +} + +export function renderMessages(): void { + const currentSession = state.get(KEYS.CURRENT_SESSION); + const msgs = currentSession ? currentSession.messages : []; + + if (msgs.length === 0) { + emptyStateEl.style.display = ''; + messagesContainerEl.style.display = 'none'; + return; + } + + emptyStateEl.style.display = 'none'; + messagesContainerEl.style.display = ''; + + const existingCount = messagesContainerEl.children.length; + const isNewMessage = existingCount > 0 && existingCount < msgs.length; + for (let i = existingCount; i < msgs.length; i++) { + appendMessageDOM(msgs[i], i); + } + + if (isNewMessage) { + scrollToBottom(); + } else if (msgs.length > 0) { + chatAreaEl.scrollTop = chatAreaEl.scrollHeight; + } +} + +export function appendMessageDOM(msg: ChatMessage, index: number): void { + const div = document.createElement('div'); + div.className = `message ${msg.role}`; + div.dataset.index = String(index); + + const avatar = msg.role === 'user' ? '👤' : '🤖'; + const roleLabel = msg.role === 'user' ? '你' : 'AI'; + const modelTag = (msg.role === 'assistant' && msg.model) + ? `${escapeHtml(msg.model)}` + : ''; + + let contentHtml = ''; + const safeContent = (msg.content != null) ? String(msg.content) : ''; + + if (msg.role === 'assistant') { + if (msg.think) { + contentHtml += ` +
+
+ 🤔 思考过程 + +
+ 
${escapeHtml(msg.think)}
+
`; + } + if (safeContent) { + contentHtml += `
${safeMarkdown(safeContent)}
`; + } else { + contentHtml += `
`; + } + } else { + contentHtml += `
${escapeHtml(safeContent)}
`; + } + + if (msg.images && msg.images.length > 0) { + contentHtml += '
'; + for (const img of msg.images) { + contentHtml += `用户图片`; + } + contentHtml += '
'; + } + + if (msg.files && msg.files.length > 0) { + contentHtml += '
'; + for (const f of msg.files) { + const icon = getFileIcon(f.name); + contentHtml += `
${icon}${escapeHtml(f.name)}
`; + } + contentHtml += '
'; + } + + if (msg.role === 'user' && (!msg.content || msg.content.trim() === '') && (msg.images?.length || 0) > 0) { + contentHtml = contentHtml.replace('
', ''); + } + + const stats: string[] = []; + if (msg.timestamp) stats.push(formatTime(msg.timestamp)); + if (msg.eval_count) stats.push(`${msg.eval_count} tokens`); + if (msg.total_duration) stats.push(`${(msg.total_duration / 1e9).toFixed(1)}s`); + if (stats.length > 0) { + contentHtml += `
${stats.map(s => `${s}`).join(' · ')}
`; + } + + if (msg.role === 'assistant' && msg.ragSources && msg.ragSources.length > 0) { + const sourcesHtml = msg.ragSources.map((s, i) => { + const scorePercent = s.score ? `${(s.score * 100).toFixed(0)}%` : ''; + return `
+ 📄 来源 ${i + 1}: ${escapeHtml(s.filename)} + ${scorePercent ? `${scorePercent}` : ''} +
`; + }).join(''); + contentHtml += `
🧠 基于知识库回答
${sourcesHtml}
`; + } + + div.innerHTML = ` +
${avatar}
+
+
${roleLabel}${modelTag}
+ ${contentHtml} +
+ `; + + messagesContainerEl.appendChild(div); +} + +export function updateLastAssistantMessage(content: string, think: string | null, stats: { eval_count?: number; total_duration?: number } | null, model?: string): void { + const lastMsg = currentPlaceholder; + if (!lastMsg) return; + + if (lastMsg.classList.contains('loading')) { + lastMsg.classList.remove('loading'); + const loadingDots = lastMsg.querySelector('.loading-dots'); + const loadingText = lastMsg.querySelector('.loading-text'); + if (loadingDots) loadingDots.remove(); + if (loadingText) loadingText.remove(); + } + + if (model) { + let modelTag = lastMsg.querySelector('.model-tag'); + if (!modelTag) { + modelTag = document.createElement('span'); + modelTag.className = 'model-tag'; + const roleEl = lastMsg.querySelector('.msg-role'); + if (roleEl) roleEl.appendChild(modelTag); + } + modelTag.textContent = model; + } + + const contentDiv = lastMsg.querySelector('.msg-content'); + const safeContent = (content != null) ? String(content) : ''; + if (contentDiv && safeContent) { + contentDiv.innerHTML = safeMarkdown(safeContent); + } + + let thinkBlock = lastMsg.querySelector('.think-block'); + if (think) { + if (!thinkBlock) { + const msgBody = lastMsg.querySelector('.msg-body')!; + thinkBlock = document.createElement('div'); + thinkBlock.className = 'think-block'; + thinkBlock.innerHTML = ` +
+ 🤔 思考过程 + +
+ 

+      `;
+      msgBody.insertBefore(thinkBlock, contentDiv);
+    }
+    thinkBlock.querySelector('pre')!.textContent = think;
+  }
+
+  if (stats) {
+    let statsDiv = lastMsg.querySelector('.msg-stats');
+    if (!statsDiv) {
+      statsDiv = document.createElement('div');
+      statsDiv.className = 'msg-stats';
+      lastMsg.querySelector('.msg-body')!.appendChild(statsDiv);
+    }
+    const parts: string[] = [];
+    if (stats.eval_count) parts.push(`${stats.eval_count} tokens`);
+    if (stats.total_duration) parts.push(`${(stats.total_duration / 1e9).toFixed(1)}s`);
+    if (parts.length) statsDiv.innerHTML = parts.join(' · ');
+  }
+
+  scrollToBottom();
+}
+
+export function appendAssistantPlaceholder(): void {
+  const div = document.createElement('div');
+  div.className = 'message assistant loading';
+  div.innerHTML = `
+    
🤖

+    

+      
AI

+      

+        

+        正在思考...
+      

+    

+  `;
+  messagesContainerEl.appendChild(div);
+  currentPlaceholder = div;
+  scrollToBottom();
+}
+
+export function appendSystemMessage(text: string, tempClass?: string): void {
+  const div = document.createElement('div');
+  div.style.cssText = 'text-align:center;padding:8px;font-size:12px;color:var(--text-muted);';
+  if (tempClass) div.classList.add(tempClass);
+  div.textContent = text;
+  emptyStateEl.style.display = 'none';
+  messagesContainerEl.style.display = '';
+  messagesContainerEl.appendChild(div);
+  scrollToBottom();
+}
+
+export function getMessagesContainer(): HTMLElement {
+  return messagesContainerEl;
+}
+
+export function clearMessages(): void {
+  messagesContainerEl.innerHTML = '';
+  currentPlaceholder = null;
+}
+
+export function enableAutoScroll(): void {
+  autoScroll = true;
+  if (scrollBtnEl) scrollBtnEl.style.display = 'none';
+}
+
+// ── 导出功能 ──
+
+export function exportAsMarkdown(session: ChatSession): void {
+  let md = `# ${session.title}\n\n**模型:** ${session.model}  \n**时间:** ${formatTime(session.createdAt)}\n\n---\n\n`;
+  session.messages.forEach(m => {
+    const role = m.role === 'user' ? '👤 用户' : '🤖 AI';
+    md += `### ${role}\n\n${m.content || ''}\n\n`;
+    if (m.files && m.files.length > 0) {
+      md += m.files.map(f => `📎 \`${f.name}\``).join(' · ') + '\n\n';
+    }
+    if (m.think) md += `> **思考:** ${m.think}\n\n`;
+  });
+  downloadFile(`${session.title}.md`, md, 'text/markdown');
+}
+
+export function exportAsHtml(session: ChatSession): void {
+  let html = `${escapeHtml(session.title)}
+
+
${escapeHtml(session.title)}
${formatTime(session.createdAt)} · ${session.model}
`;
+  session.messages.forEach(m => {
+    html += `
${m.role === 'user' ? '👤 用户' : '🤖 AI'}
${(m.content || '').replace(/\n/g, '
')}
`;
+  });
+  html += '';
+  downloadFile(`${session.title}.html`, html, 'text/html');
+}
+
+export function exportAsTxt(session: ChatSession): void {
+  let txt = `${session.title}\n模型: ${session.model}\n时间: ${formatTime(session.createdAt)}\n${'='.repeat(50)}\n\n`;
+  session.messages.forEach(m => {
+    txt += `[${m.role === 'user' ? '用户' : 'AI'}]\n${m.content || ''}\n\n`;
+  });
+  downloadFile(`${session.title}.txt`, txt, 'text/plain');
+}
diff --git a/src/renderer/components/header.ts b/src/renderer/components/header.ts
new file mode 100644
index 0000000..c486dd4
--- /dev/null
+++ b/src/renderer/components/header.ts
@@ -0,0 +1,87 @@
+/**
+ * Header - 顶部导航组件
+ */
+
+import { state, KEYS } from '../state/state.js';
+import { formatSize } from '../utils/utils.js';
+import { OllamaAPI } from '../api/ollama.js';
+
+let connStatusEl: HTMLElement;
+
+export function initHeader(): void {
+  connStatusEl = document.querySelector('#connStatus')!;
+}
+
+export async function checkConnection(): Promise<{ ok: boolean; version?: { version: string }; error?: Error }> {
+  const api = state.get(KEYS.API);
+  if (!api) return { ok: false, error: new Error('API 未初始化') };
+
+  connStatusEl.className = 'conn-status pending';
+  connStatusEl.querySelector('.status-label')!.textContent = '连接中...';
+
+  try {
+    const version = await api.getVersion();
+    connStatusEl.className = 'conn-status connected';
+    connStatusEl.title = `已连接 (v${version.version})`;
+    connStatusEl.querySelector('.status-label')!.textContent = '已连接';
+    return { ok: true, version };
+  } catch (err) {
+    connStatusEl.className = 'conn-status disconnected';
+    connStatusEl.title = '未连接';
+    connStatusEl.querySelector('.status-label')!.textContent = '未连接';
+    return { ok: false, error: err as Error };
+  }
+}
+
+export async function updateConnectionInfo(): Promise {
+  const api = state.get(KEYS.API);
+  if (!api) return;
+
+  const badge = document.querySelector('#connBadge')!;
+  const verEl = document.querySelector('#serverVersion')!;
+  const corsHint = document.querySelector('#corsHint') as HTMLElement;
+
+  badge.textContent = '检测中...';
+  badge.className = 'status-badge warning';
+  verEl.textContent = '';
+
+  try {
+    const version = await api.getVersion();
+    badge.textContent = '✓ 已连接';
+    badge.className = 'status-badge success';
+    verEl.textContent = `v${version.version}`;
+    corsHint.style.display = 'none';
+  } catch (err) {
+    badge.textContent = '✗ 未连接';
+    badge.className = 'status-badge error';
+    verEl.textContent = '';
+
+    if ((err as Error).message.includes('Failed to fetch') || (err as Error).message.includes('NetworkError') || (err as Error).message.includes('CORS')) {
+      corsHint.style.display = '';
+    } else {
+      corsHint.style.display = 'none';
+    }
+  }
+}
+
+export async function updateRunningModels(): Promise {
+  const api = state.get(KEYS.API);
+  if (!api) return;
+
+  const container = document.querySelector('#runningModels')!;
+  try {
+    const data = await api.psModels();
+    if (!data.models || data.models.length === 0) {
+      container.innerHTML = '
无运行中的模型
';
+      return;
+    }
+    container.innerHTML = data.models.map(m => `
+      

+        ${m.name}
+        ${formatSize(m.size_vram || 0)} VRAM
+      

+    `).join('');
+  } catch {
+    container.innerHTML = '
无法获取运行信息
';
+  }
+}
diff --git a/src/renderer/components/history-modal.ts b/src/renderer/components/history-modal.ts
new file mode 100644
index 0000000..d8f93c5
--- /dev/null
+++ b/src/renderer/components/history-modal.ts
@@ -0,0 +1,191 @@
+/**
+ * HistoryModal - 历史记录面板组件
+ */
+
+import { state, KEYS } from '../state/state.js';
+import { debounce, escapeHtml, formatTime } from '../utils/utils.js';
+import { exportAsMarkdown, exportAsHtml, exportAsTxt, renderMessages, clearMessages } from './chat-area.js';
+import { ChatDB } from '../db/chat-db.js';
+import type { ChatSession } from '../types.js';
+
+const HISTORY_PAGE_SIZE = 10;
+
+let historyModalEl: HTMLElement;
+let historyListEl: HTMLElement;
+let historyPaginationEl: HTMLElement;
+let historyPage = 1;
+let historySearchQuery = '';
+
+export function initHistoryModal(): void {
+  historyModalEl = document.querySelector('#historyModal')!;
+  historyListEl = document.querySelector('#historyList')!;
+  historyPaginationEl = document.querySelector('#historyPagination')!;
+
+  document.querySelector('#btnHistory')!.addEventListener('click', openHistoryModal);
+  document.querySelector('#btnCloseHistory')!.addEventListener('click', closeHistoryModal);
+  historyModalEl.addEventListener('click', (e) => {
+    if (e.target === historyModalEl) closeHistoryModal();
+  });
+
+  document.querySelector('#btnExitHistory')!.addEventListener('click', () => {
+    (document.querySelector('#btnNewChat') as HTMLElement).click();
+  });
+
+  const historySearchInput = document.querySelector('#historySearchInput') as HTMLInputElement;
+  const historySearchClear = document.querySelector('#historySearchClear') as HTMLElement;
+  const doHistorySearch = debounce(() => {
+    historySearchQuery = historySearchInput.value.trim();
+    historySearchClear.style.display = historySearchQuery ? '' : 'none';
+    historyPage = 1;
+    loadHistory();
+  }, 250);
+  historySearchInput.addEventListener('input', doHistorySearch);
+  historySearchClear.addEventListener('click', () => {
+    historySearchInput.value = '';
+    historySearchQuery = '';
+    historySearchClear.style.display = 'none';
+    historyPage = 1;
+    loadHistory();
+  });
+
+  historyListEl.addEventListener('click', async (e) => {
+    const target = (e.target as HTMLElement).closest('[data-id]') as HTMLElement;
+    if (!target) return;
+    const sessionId = target.dataset.id!;
+    const db = state.get(KEYS.DB);
+
+    if (target.classList.contains('btn-delete-session')) {
+      if (confirm('确定删除此会话？')) {
+        await db!.deleteSession(sessionId);
+        const currentSession = state.get(KEYS.CURRENT_SESSION);
+        if (currentSession && currentSession.id === sessionId) {
+          (document.querySelector('#btnNewChat') as HTMLElement).click();
+        }
+        loadHistory();
+      }
+    } else if (target.classList.contains('btn-export-md')) {
+      const session = await db!.getSession(sessionId);
+      if (session) exportAsMarkdown(session);
+    } else if (target.classList.contains('btn-export-html')) {
+      const session = await db!.getSession(sessionId);
+      if (session) exportAsHtml(session);
+    } else if (target.classList.contains('btn-export-txt')) {
+      const session = await db!.getSession(sessionId);
+      if (session) exportAsTxt(session);
+    } else if (target.classList.contains('history-info') || target.classList.contains('history-item')) {
+      loadHistorySession(sessionId);
+    }
+  });
+
+  historyPaginationEl.addEventListener('click', (e) => {
+    const btn = (e.target as HTMLElement).closest('.page-btn') as HTMLElement;
+    if (!btn || btn.classList.contains('disabled')) return;
+    const page = parseInt(btn.dataset.page!);
+    if (page && page !== historyPage) {
+      historyPage = page;
+      loadHistory();
+      historyListEl.scrollTop = 0;
+    }
+  });
+}
+
+async function loadHistory(): Promise {
+  const db = state.get(KEYS.DB);
+  if (!db) return;
+
+  let allSessions = await db.getAllSessions();
+
+  if (historySearchQuery) {
+    const q = historySearchQuery.toLowerCase();
+    allSessions = allSessions.filter(s => {
+      if (s.title?.toLowerCase().includes(q)) return true;
+      if (s.model?.toLowerCase().includes(q)) return true;
+      return s.messages.some(m => m.content?.toLowerCase().includes(q));
+    });
+  }
+
+  allSessions.sort((a, b) => b.updatedAt - a.updatedAt);
+
+  if (allSessions.length === 0) {
+    historyListEl.innerHTML = `
暂无历史记录
`;
+    historyPaginationEl.innerHTML = '';
+    return;
+  }
+
+  const totalPages = Math.ceil(allSessions.length / HISTORY_PAGE_SIZE);
+  if (historyPage > totalPages) historyPage = totalPages;
+
+  const start = (historyPage - 1) * HISTORY_PAGE_SIZE;
+  const pageSessions = allSessions.slice(start, start + HISTORY_PAGE_SIZE);
+
+  historyListEl.innerHTML = pageSessions.map(s => `
+    

+      

+        
${escapeHtml(s.title)}

+        

+          ${formatTime(s.updatedAt)}
+          ${s.messages.length} 条消息
+          ${s.model || '无模型'}
+        

+      

+      

+        
+        
+        
+        
+      

+    

+  `).join('');
+
+  if (totalPages <= 1) {
+    historyPaginationEl.innerHTML = `共 ${allSessions.length} 条`;
+    return;
+  }
+
+  let html = `共 ${allSessions.length} 条
`;
+  html += ``;
+  const range = 2;
+  const pages: number[] = [];
+  for (let i = 1; i <= totalPages; i++) {
+    if (i === 1 || i === totalPages || (i >= historyPage - range && i <= historyPage + range)) pages.push(i);
+  }
+  let prev = 0;
+  for (const p of pages) {
+    if (p - prev > 1) html += '…';
+    html += ``;
+    prev = p;
+  }
+  html += `
`;
+  historyPaginationEl.innerHTML = html;
+}
+
+async function loadHistorySession(sessionId: string): Promise {
+  const db = state.get(KEYS.DB);
+  if (!db) return;
+
+  const session = await db.getSession(sessionId);
+  if (!session) return;
+
+  state.set(KEYS.CURRENT_SESSION, session);
+  state.set(KEYS.IS_HISTORY_VIEW, true);
+
+  (document.querySelector('#historyBar') as HTMLElement).style.display = '';
+  (document.querySelector('#inputArea') as HTMLElement).style.display = 'none';
+
+  clearMessages();
+  renderMessages();
+  closeHistoryModal();
+}
+
+export function openHistoryModal(): void {
+  historyPage = 1;
+  historySearchQuery = '';
+  (document.querySelector('#historySearchInput') as HTMLInputElement).value = '';
+  (document.querySelector('#historySearchClear') as HTMLElement).style.display = 'none';
+  loadHistory();
+  historyModalEl.style.display = '';
+}
+
+export function closeHistoryModal(): void {
+  historyModalEl.style.display = 'none';
+}
diff --git a/src/renderer/components/input-area.ts b/src/renderer/components/input-area.ts
new file mode 100644
index 0000000..b1a904d
--- /dev/null
+++ b/src/renderer/components/input-area.ts
@@ -0,0 +1,534 @@
+/**
+ * InputArea - 输入区域组件
+ */
+
+import { state, KEYS } from '../state/state.js';
+import { fileToBase64, fileToText, detectLanguage, truncate, escapeHtml, formatSize } from '../utils/utils.js';
+import { getSelectedModel, isThinkEnabled, isVisionAvailable } from './model-bar.js';
+import {
+  renderMessages, appendAssistantPlaceholder, appendSystemMessage,
+  updateLastAssistantMessage, clearMessages, safeMarkdown, enableAutoScroll
+} from './chat-area.js';
+import { showToast } from './toast.js';
+import { isRagEnabled, performRagRetrieval } from './kb-modal.js';
+import { ChatDB } from '../db/chat-db.js';
+import { OllamaAPI } from '../api/ollama.js';
+import type { ChatSession, ChatMessage, OllamaStreamChunk, RagSource, FileContent, ChatFile } from '../types.js';
+
+let chatInputEl: HTMLTextAreaElement;
+let btnSendEl: HTMLButtonElement;
+let fileInputEl: HTMLInputElement;
+let textFileInputEl: HTMLInputElement;
+let imagePreviewEl: HTMLElement;
+let filePreviewEl: HTMLElement;
+let pendingImages: Array<{ name: string; base64: string }> = [];
+let pendingFiles: Array<{ name: string; content: string; language: string; size: number }> = [];
+
+const TEXT_EXTENSIONS = new Set([
+  'txt','md','markdown','rst','log','csv','tsv',
+  'py','pyw','pyi','js','mjs','cjs','ts','tsx','jsx',
+  'java','c','h','cpp','cc','cxx','hpp','go','rs','rb','php',
+  'sh','bash','zsh','fish','sql','html','htm','css',
+  'json','jsonl','xml','svg','yaml','yml','toml','ini','cfg','conf',
+  'swift','kt','kts','scala','lua','r','m','mm',
+  'cs','fs','vb','ex','exs','erl','hs','clj','lisp',
+  'diff','patch','pl','dockerfile','makefile'
+]);
+
+const MAX_FILE_SIZE = 500 * 1024;
+
+function getFileIcon(filename: string): string {
+  const name = filename.toLowerCase();
+  if (name === 'dockerfile') return '🐳';
+  if (name === 'makefile' || name === 'gnumakefile') return '🔨';
+  const ext = filename.split('.').pop()?.toLowerCase() || '';
+  const map: Record = { py: '🐍', js: '💛', ts: '🔷', java: '☕', go: '🐹', rs: '🦀', cpp: '⚙️', c: '⚙️', sh: '🐚', html: '🌐', css: '🎨', json: '📋', md: '📝', txt: '📄', sql: '🗃️', csv: '📊' };
+  return map[ext] || '📄';
+}
+
+function isTextFile(file: File): boolean {
+  const name = file.name.toLowerCase();
+  if (name === 'dockerfile' || name === 'makefile') return true;
+  const ext = name.split('.').pop() || '';
+  return TEXT_EXTENSIONS.has(ext);
+}
+
+export function initInputArea(): void {
+  chatInputEl = document.querySelector('#chatInput')!;
+  btnSendEl = document.querySelector('#btnSend')!;
+  fileInputEl = document.querySelector('#fileInput')!;
+  textFileInputEl = document.querySelector('#textFileInput')!;
+  imagePreviewEl = document.querySelector('#imagePreview')!;
+  filePreviewEl = document.querySelector('#filePreview')!;
+
+  btnSendEl.addEventListener('click', () => {
+    if (state.get(KEYS.IS_STREAMING)) {
+      stopGeneration();
+    } else {
+      sendMessage();
+    }
+  });
+
+  chatInputEl.addEventListener('keydown', (e) => {
+    if (e.key === 'Enter' && !e.shiftKey) {
+      e.preventDefault();
+      sendMessage();
+    }
+  });
+
+  chatInputEl.addEventListener('input', autoResizeTextarea);
+
+  document.querySelector('#btnAttachImg')!.addEventListener('click', () => {
+    if (!isVisionAvailable()) {
+      showToast('当前模型不支持图片分析', 'warning');
+      return;
+    }
+    fileInputEl.click();
+  });
+  fileInputEl.addEventListener('change', (e) => {
+    handleImageSelect((e.target as HTMLInputElement).files!);
+    (e.target as HTMLInputElement).value = '';
+  });
+
+  document.querySelector('#btnAttachFile')!.addEventListener('click', () => textFileInputEl.click());
+  textFileInputEl.addEventListener('change', (e) => {
+    handleTextFileSelect((e.target as HTMLInputElement).files!);
+    (e.target as HTMLInputElement).value = '';
+  });
+
+  imagePreviewEl.addEventListener('click', (e) => {
+    const target = e.target as HTMLElement;
+    if (target.classList.contains('remove-img')) {
+      pendingImages.splice(parseInt((target as HTMLElement).dataset.index!), 1);
+      renderImagePreviews();
+    }
+  });
+
+  filePreviewEl.addEventListener('click', (e) => {
+    const target = e.target as HTMLElement;
+    if (target.classList.contains('remove-file')) {
+      pendingFiles.splice(parseInt((target as HTMLElement).dataset.index!), 1);
+      renderFilePreviews();
+    }
+  });
+}
+
+function autoResizeTextarea(): void {
+  chatInputEl.style.height = 'auto';
+  chatInputEl.style.height = Math.min(chatInputEl.scrollHeight, 120) + 'px';
+}
+
+async function handleImageSelect(files: FileList): Promise {
+  const maxSize = 20 * 1024 * 1024;
+  for (const file of Array.from(files)) {
+    if (!file.type.startsWith('image/')) continue;
+    if (file.size > maxSize) {
+      appendSystemMessage(`⚠️ 图片 ${file.name} 超过 20MB 限制`);
+      continue;
+    }
+    try {
+      const base64 = await fileToBase64(file);
+      pendingImages.push({ name: file.name, base64 });
+      renderImagePreviews();
+    } catch (err) {
+      console.error('[InputArea] 图片读取失败:', err);
+    }
+  }
+}
+
+function renderImagePreviews(): void {
+  if (pendingImages.length === 0) {
+    imagePreviewEl.style.display = 'none';
+    imagePreviewEl.innerHTML = '';
+    return;
+  }
+  imagePreviewEl.style.display = '';
+  imagePreviewEl.innerHTML = pendingImages.map((img, i) => `
+    

+      ${escapeHtml(img.name)}
+      
+    

+  `).join('');
+}
+
+async function handleTextFileSelect(files: FileList): Promise {
+  for (const file of Array.from(files)) {
+    if (!isTextFile(file)) {
+      appendSystemMessage(`⚠️ ${file.name} 不是支持的文本/代码文件`);
+      continue;
+    }
+    if (file.size > MAX_FILE_SIZE) {
+      appendSystemMessage(`⚠️ ${file.name} 超过 500KB 限制（${formatSize(file.size)}）`);
+      continue;
+    }
+    if (pendingFiles.some(f => f.name === file.name && f.size === file.size)) {
+      appendSystemMessage(`ℹ️ ${file.name} 已添加`);
+      continue;
+    }
+    try {
+      const content = await fileToText(file);
+      pendingFiles.push({ name: file.name, content, language: detectLanguage(file.name), size: file.size });
+      renderFilePreviews();
+    } catch (err) {
+      console.error('[InputArea] 文件读取失败:', err);
+      appendSystemMessage(`❌ 读取 ${file.name} 失败`);
+    }
+  }
+}
+
+function renderFilePreviews(): void {
+  if (pendingFiles.length === 0) {
+    filePreviewEl.style.display = 'none';
+    filePreviewEl.innerHTML = '';
+    return;
+  }
+  filePreviewEl.style.display = '';
+  filePreviewEl.innerHTML = pendingFiles.map((f, i) => `
+    

+      ${getFileIcon(f.name)}
+      ${escapeHtml(f.name)}
+      ${formatSize(f.size)}
+      
+    

+  `).join('');
+}
+
+function updateSendButton(streaming: boolean): void {
+  if (streaming) {
+    btnSendEl.innerHTML = ``;
+    btnSendEl.classList.add('stop-btn');
+    btnSendEl.classList.remove('disabled');
+    btnSendEl.title = '停止生成';
+  } else {
+    btnSendEl.innerHTML = ``;
+    btnSendEl.classList.remove('stop-btn');
+    btnSendEl.classList.remove('disabled');
+    btnSendEl.title = '发送';
+  }
+}
+
+function stopGeneration(): void {
+  const abortController = state.get(KEYS.ABORT_CONTROLLER);
+  if (abortController) abortController.abort();
+}
+
+function buildApiMessages(messages: ChatMessage[]): Array<{ role: string; content: string; images?: string[] }> {
+  return messages.map(m => {
+    let content = m.content || '';
+    if (m._fileContents && m._fileContents.length > 0) {
+      const fileParts = m._fileContents.map(f => {
+        const lang = f.language || '';
+        return `📄 以下是一个文件内容：\n\n\`\`\`${lang}\n${f.content}\n\`\`\``;
+      });
+      if (content) {
+        content += '\n\n---\n' + fileParts.join('\n\n---\n');
+      } else {
+        const count = m._fileContents.length;
+        content = `请分析以下 ${count > 1 ? count + ' 个' : ''}文件：\n\n${fileParts.join('\n\n---\n')}`;
+      }
+    }
+    return {
+      role: m.role,
+      content,
+      ...(m.images && { images: m.images })
+    };
+  });
+}
+
+export async function sendMessage(): Promise {
+  const text = chatInputEl.value.trim();
+  if (!text && pendingImages.length === 0 && pendingFiles.length === 0) return;
+  if (state.get(KEYS.IS_STREAMING)) return;
+
+  const model = getSelectedModel();
+  if (!model) {
+    appendSystemMessage('⚠️ 请先选择一个模型');
+    return;
+  }
+
+  if (pendingImages.length > 0 && !isVisionAvailable()) {
+    appendSystemMessage('⚠️ 当前模型不支持图片分析，请移除图片后重试');
+    return;
+  }
+
+  const currentSession = state.get(KEYS.CURRENT_SESSION);
+  if (!currentSession) return;
+
+  const now = Date.now();
+  const msgsToAdd: ChatMessage[] = [];
+
+  const userFiles: ChatFile[] = pendingFiles.map(f => ({ name: f.name, language: f.language, size: f.size }));
+
+  if (pendingImages.length > 0) {
+    msgsToAdd.push({
+      role: 'user',
+      content: pendingImages.length === 1 ? `[上传了图片: ${pendingImages[0].name}]` : `[上传了 ${pendingImages.length} 张图片]`,
+      images: pendingImages.map(img => img.base64),
+      timestamp: now
+    });
+  }
+
+  if (text || pendingFiles.length > 0) {
+    const msg: ChatMessage = {
+      role: 'user',
+      content: text || '',
+      timestamp: now
+    };
+    if (userFiles.length > 0) {
+      msg.files = userFiles;
+      msg._fileContents = pendingFiles.map(f => ({ language: f.language, content: f.content }));
+    }
+    msgsToAdd.push(msg);
+  }
+
+  const isFirstMsg = currentSession.messages.length === 0;
+  state.update(KEYS.CURRENT_SESSION, (session: any) => ({
+    ...session,
+    ...(isFirstMsg && {
+      title: truncate(text || (pendingFiles.length > 0 ? `[文件: ${pendingFiles.map(f => f.name).join(', ')}]` : '[图片消息]'), 30),
+      model
+    }),
+    messages: [...session.messages, ...msgsToAdd],
+    updatedAt: Date.now()
+  }));
+
+  const freshSession = state.get(KEYS.CURRENT_SESSION);
+
+  enableAutoScroll();
+  renderMessages();
+  await saveCurrentSession();
+
+  chatInputEl.value = '';
+  pendingImages = [];
+  pendingFiles = [];
+  imagePreviewEl.style.display = 'none';
+  imagePreviewEl.innerHTML = '';
+  filePreviewEl.style.display = 'none';
+  filePreviewEl.innerHTML = '';
+  autoResizeTextarea();
+
+  appendAssistantPlaceholder();
+
+  state.set(KEYS.IS_STREAMING, true);
+  updateSendButton(true);
+
+  const api = state.get(KEYS.API)!;
+  const abortController = new AbortController();
+  state.set(KEYS.ABORT_CONTROLLER, abortController);
+  const thinkMode = isThinkEnabled();
+  const systemPromptEnabled = state.get(KEYS.SYSTEM_PROMPT_ENABLED);
+  const systemPrompt = state.get(KEYS.SYSTEM_PROMPT);
+  const numCtx = state.get(KEYS.NUM_CTX, 24576);
+
+  let assistantContent = '';
+  let thinkContent = '';
+  let finalStats: { eval_count?: number; total_duration?: number } | null = null;
+  let modelName = '';
+
+  try {
+    const apiMessages = buildApiMessages(freshSession.messages);
+    const temperature = state.get('temperature', 0.7);
+
+    const chatParams: Record = {
+      model,
+      messages: apiMessages,
+      stream: true,
+      think: thinkMode,
+    };
+    if (systemPromptEnabled && systemPrompt) chatParams.system = systemPrompt;
+    if (numCtx) chatParams.options = { num_ctx: numCtx, temperature };
+
+    let ragSources: RagSource[] | null = null;
+
+    if (isRagEnabled()) {
+      appendSystemMessage('🧠 正在检索知识库...', 'rag-status');
+      try {
+        const textForRag = text;
+        const ragResult = await performRagRetrieval(textForRag);
+        if (ragResult && ragResult.results && ragResult.results.length > 0) {
+          const ctxLimit = numCtx || 24576;
+          const outputReserve = 2048;
+          const msgChars = apiMessages.reduce((sum, m) => sum + (m.content?.length || 0), 0);
+          const systemChars = ((chatParams.system as string)?.length || 0);
+          const usedTokens = Math.ceil((msgChars + systemChars) / 2);
+          const ragBudget = Math.max(0, ctxLimit - outputReserve - usedTokens);
+          const ragBudgetChars = ragBudget * 2;
+
+          let ragContext = ragResult.results.map((r: any, i: number) =>
+            `[来源 ${i + 1}: ${r.filename}]\n${r.text}`
+          ).join('\n\n---\n\n');
+
+          const ragTemplate = `你是一个知识库问答助手。以下是检索到的相关文档片段，请基于这些内容回答用户的问题。\n\n=== 检索到的相关内容 ===\n${ragContext}\n=== 内容结束 ===`;
+          if (ragContext.length + ragTemplate.length > ragBudgetChars) {
+            ragContext = ragContext.slice(0, Math.max(0, ragBudgetChars - ragTemplate.length - 50)) + '\n\n[知识库内容过长，已截取最相关的部分]';
+            appendSystemMessage(`⚠️ 知识库内容已截取（预算 ${ragBudgetChars} 字符）`, 'rag-status');
+          }
+
+          const ragPrompt = `你是一个知识库问答助手。以下是检索到的相关文档片段，请基于这些内容回答用户的问题。如果检索到的内容无法回答问题，请如实说明。\n\n=== 检索到的相关内容 ===\n${ragContext}\n=== 内容结束 ===\n\n请基于以上内容回答用户的问题。引用时请注明来源编号（如"来源 1"）。`;
+
+          chatParams.system = chatParams.system
+            ? (chatParams.system as string) + '\n\n' + ragPrompt
+            : ragPrompt;
+
+          ragSources = ragResult.results.map((r: any) => ({
+            filename: r.filename,
+            score: r.score,
+            text: truncate(r.text, 100)
+          }));
+          const sourceNames = [...new Set(ragSources.map(s => s.filename))];
+          appendSystemMessage(`🧠 已检索 ${ragSources.length} 个相关片段（来源：${sourceNames.join('、')}）`, 'rag-status');
+        } else {
+          appendSystemMessage('🧠 知识库未检索到相关内容，使用通用知识回答', 'rag-status');
+        }
+      } catch (ragErr) {
+        console.error('[RAG] 检索失败:', ragErr);
+        appendSystemMessage(`🧠 知识库检索失败: ${(ragErr as Error).message}`, 'rag-status');
+      }
+    }
+
+    let ragStatusCleared = false;
+
+    await api.chatStream(chatParams as any, (chunk: OllamaStreamChunk) => {
+      if (!ragStatusCleared && chunk.message?.content) {
+        ragStatusCleared = true;
+        document.querySelectorAll('.rag-status').forEach(el => el.remove());
+      }
+      if (chunk.message) {
+        if (chunk.message.content) assistantContent += chunk.message.content;
+        const think = chunk.message.thinking || chunk.message.reasoning_content;
+        if (think && typeof think === 'string') thinkContent += think;
+      }
+      if (chunk.model) modelName = chunk.model;
+      updateLastAssistantMessage(assistantContent, thinkContent || null, null, modelName || undefined);
+      if (chunk.done) {
+        finalStats = { eval_count: chunk.eval_count, total_duration: chunk.total_duration };
+      }
+    }, abortController);
+
+    if (!assistantContent && !thinkContent) {
+      appendSystemMessage('⚠️ 模型未返回任何内容，可能是上下文过长或模型不支持当前请求');
+    }
+
+    const assistantMsg: ChatMessage = {
+      role: 'assistant',
+      content: assistantContent || '',
+      timestamp: Date.now(),
+      ...(modelName && { model: modelName }),
+      ...(thinkContent && { think: thinkContent }),
+      ...(finalStats && { eval_count: finalStats.eval_count, total_duration: finalStats.total_duration }),
+      ...(ragSources && { ragSources })
+    };
+    state.update(KEYS.CURRENT_SESSION, (session: any) => ({
+      ...session,
+      messages: [...session.messages, assistantMsg],
+      updatedAt: Date.now()
+    }));
+
+    if (finalStats) {
+      updateLastAssistantMessage(assistantContent, thinkContent || null, finalStats, modelName || undefined);
+    }
+
+    if (ragSources && ragSources.length > 0) {
+      const lastAssistant = document.querySelector('#messagesContainer .message.assistant:last-of-type');
+      if (lastAssistant) {
+        const sourcesHtml = ragSources.map((s, i) => {
+          const scorePercent = s.score ? `${(s.score * 100).toFixed(0)}%` : '';
+          return `
📄 来源 ${i + 1}: ${escapeHtml(s.filename)}${scorePercent ? `${scorePercent}` : ''}
`;
+        }).join('');
+        const ragDiv = document.createElement('div');
+        ragDiv.className = 'rag-sources';
+        ragDiv.innerHTML = `
🧠 基于知识库回答
${sourcesHtml}`;
+        lastAssistant.querySelector('.msg-body')!.appendChild(ragDiv);
+      }
+    }
+
+    await saveCurrentSession();
+  } catch (err) {
+    console.error('[InputArea] 流式聊天错误:', err);
+    document.querySelectorAll('.rag-status').forEach(el => el.remove());
+
+    if ((err as Error).name === 'AbortError') {
+      const placeholder = document.querySelector('#messagesContainer .message.assistant.loading') as HTMLElement;
+      const loadingDots = placeholder?.querySelector('.loading-dots');
+      const loadingText = placeholder?.querySelector('.loading-text');
+      if (loadingDots) loadingDots.remove();
+      if (loadingText) loadingText.remove();
+      placeholder?.classList.remove('loading');
+
+      const contentDiv = placeholder?.querySelector('.msg-content');
+      const partialMsg: ChatMessage = {
+        role: 'assistant',
+        content: assistantContent,
+        timestamp: Date.now(),
+        ...(modelName && { model: modelName }),
+        ...(thinkContent && { think: thinkContent }),
+        stopped: true
+      };
+      state.update(KEYS.CURRENT_SESSION, (session: any) => ({
+        ...session,
+        messages: [...session.messages, partialMsg],
+        updatedAt: Date.now()
+      }));
+
+      if (contentDiv) {
+        let html = assistantContent ? safeMarkdown(assistantContent) : '';
+        html += '
[已停止]
';
+        contentDiv.innerHTML = html;
+      }
+      appendSystemMessage('⏹ 已停止生成');
+      await saveCurrentSession();
+      state.set(KEYS.IS_STREAMING, false);
+      updateSendButton(false);
+      state.set(KEYS.ABORT_CONTROLLER, null);
+      return;
+    }
+
+    const placeholder = document.querySelector('#messagesContainer .message.assistant.loading') as HTMLElement;
+    const loadingDots = placeholder?.querySelector('.loading-dots');
+    const loadingText = placeholder?.querySelector('.loading-text');
+    if (loadingDots) loadingDots.remove();
+    if (loadingText) loadingText.remove();
+    placeholder?.classList.remove('loading');
+
+    const contentDiv = placeholder?.querySelector('.msg-content');
+
+    if (assistantContent && contentDiv) {
+      state.update(KEYS.CURRENT_SESSION, (session: any) => ({
+        ...session,
+        messages: [...session.messages, { role: 'assistant', content: assistantContent + '\n\n`[已中断]`', timestamp: Date.now() } as ChatMessage],
+        updatedAt: Date.now()
+      }));
+      contentDiv.innerHTML = safeMarkdown(assistantContent) + '
[已中断]
';
+      await saveCurrentSession();
+    } else {
+      if (placeholder) placeholder.remove();
+    }
+
+    let errMsg = `❌ 错误: ${(err as Error).message}`;
+    if ((err as Error).message.includes('Failed to fetch') || (err as Error).message.includes('NetworkError')) {
+      errMsg = '❌ 连接失败。请检查：\n1. Ollama 是否正在运行\n2. 地址是否正确\n3. 是否设置了 OLLAMA_ORIGINS="*"';
+    } else if ((err as Error).message.includes('400')) {
+      errMsg = '❌ 请求参数错误，可能是知识库内容超出模型上下文限制';
+    } else if ((err as Error).message.includes('500')) {
+      errMsg = '❌ Ollama 服务器错误，请检查 Ollama 日志';
+    }
+    appendSystemMessage(errMsg);
+  } finally {
+    state.set(KEYS.IS_STREAMING, false);
+    updateSendButton(false);
+    state.set(KEYS.ABORT_CONTROLLER, null);
+  }
+}
+
+async function saveCurrentSession(): Promise {
+  const db = state.get(KEYS.DB);
+  const currentSession = state.get(KEYS.CURRENT_SESSION);
+  const isHistoryView = state.get(KEYS.IS_HISTORY_VIEW);
+  if (!currentSession || !db || isHistoryView) return;
+  currentSession.updatedAt = Date.now();
+  try {
+    await db.saveSession(currentSession);
+  } catch (err) {
+    console.error('[InputArea] 保存会话失败:', err);
+  }
+}
diff --git a/src/renderer/components/kb-modal.ts b/src/renderer/components/kb-modal.ts
new file mode 100644
index 0000000..e3983dd
--- /dev/null
+++ b/src/renderer/components/kb-modal.ts
@@ -0,0 +1,307 @@
+/**
+ * KBModal - 知识库管理面板
+ */
+
+import { state, KEYS } from '../state/state.js';
+import {
+  initVectorStore, getVectorStore, addDocumentToKB,
+  removeDocumentFromKB, getDocumentsInCollection, retrieveContext,
+  buildRagSystemPrompt
+} from '../services/rag.js';
+import { fileToText, formatSize, escapeHtml, truncate } from '../utils/utils.js';
+import { showToast } from './toast.js';
+import { OllamaAPI } from '../api/ollama.js';
+import type { VectorCollection, SearchResult } from '../types.js';
+
+let kbModalEl: HTMLElement;
+let currentColId: string | null = null;
+let ragEnabled = false;
+let ragCollectionId: string | null = null;
+
+export function initKBModal(): void {
+  kbModalEl = document.querySelector('#kbModal')!;
+
+  document.querySelector('#btnKB')!.addEventListener('click', openKBModal);
+  document.querySelector('#btnCloseKB')!.addEventListener('click', closeKBModal);
+  kbModalEl.addEventListener('click', (e) => {
+    if (e.target === kbModalEl) closeKBModal();
+  });
+
+  document.querySelector('#btnNewCollection')!.addEventListener('click', createCollection);
+
+  document.querySelector('#btnUploadDoc')!.addEventListener('click', () => {
+    if (!currentColId) { showToast('请先选择一个知识库集合', 'warning'); return; }
+    (document.querySelector('#kbFileInput') as HTMLInputElement).click();
+  });
+  document.querySelector('#kbFileInput')!.addEventListener('change', handleDocUpload);
+
+  document.querySelector('#toggleRAG')!.addEventListener('change', (e) => {
+    ragEnabled = (e.target as HTMLInputElement).checked;
+    if (ragEnabled && currentColId) {
+      ragCollectionId = currentColId;
+      showToast('RAG 知识检索已开启', 'success');
+    } else if (ragEnabled && !currentColId) {
+      (e.target as HTMLInputElement).checked = false;
+      ragEnabled = false;
+      showToast('请先选择一个知识库集合', 'warning');
+      return;
+    } else {
+      ragCollectionId = null;
+      showToast('RAG 知识检索已关闭', 'info');
+    }
+    updateRagBadge();
+  });
+
+  document.querySelector('#selectEmbedModel')!.addEventListener('change', async (e) => {
+    if (!currentColId) return;
+    const vs = getVectorStore();
+    const col = await vs!.getCollection(currentColId);
+    if (col) {
+      col.embeddingModel = (e.target as HTMLSelectElement).value;
+      await vs!.updateCollection(col);
+    }
+  });
+}
+
+export function isRagEnabled(): boolean {
+  return ragEnabled && !!ragCollectionId;
+}
+
+export function getRagCollectionId(): string | null {
+  return ragCollectionId;
+}
+
+export async function performRagRetrieval(query: string): Promise<{ context: string; results: SearchResult[]; ragPrompt: string } | null> {
+  if (!isRagEnabled()) return null;
+  try {
+    const { context, results } = await retrieveContext(query, ragCollectionId!, 5);
+    if (!context) return null;
+    return { context, results, ragPrompt: buildRagSystemPrompt(context) };
+  } catch (err) {
+    console.warn('[KB] RAG 检索失败:', err);
+    return null;
+  }
+}
+
+function updateRagBadge(): void {
+  const badge = document.querySelector('#badgeRAG') as HTMLElement;
+  if (!badge) return;
+  badge.style.display = ragEnabled ? '' : 'none';
+}
+
+async function openKBModal(): Promise {
+  kbModalEl.style.display = '';
+  await refreshCollections();
+  await populateEmbedModels();
+}
+
+function closeKBModal(): void {
+  kbModalEl.style.display = 'none';
+}
+
+async function refreshCollections(): Promise {
+  const vs = await initVectorStore();
+  const collections = await vs.getCollections();
+  const listEl = document.querySelector('#kbCollectionList')!;
+
+  if (collections.length === 0) {
+    listEl.innerHTML = '
暂无知识库，点击上方「新建集合」创建
';
+    currentColId = null;
+    refreshDocList();
+    return;
+  }
+
+  listEl.innerHTML = collections.map(c => `
+    

+      

+        ${escapeHtml(c.name)}
+        ${c.docCount || 0} 文档 · ${(c.chunkCount || 0)} 分块
+      

+      
+    

+  `).join('');
+
+  listEl.querySelectorAll('.kb-collection-item').forEach(el => {
+    el.addEventListener('click', async (e) => {
+      if ((e.target as HTMLElement).closest('.kb-col-delete')) return;
+      currentColId = (el as HTMLElement).dataset.id!;
+      await refreshCollections();
+      await refreshDocList();
+      const vs = getVectorStore();
+      const col = await vs!.getCollection(currentColId);
+      if (col?.embeddingModel) {
+        (document.querySelector('#selectEmbedModel') as HTMLSelectElement).value = col.embeddingModel;
+      }
+    });
+  });
+
+  listEl.querySelectorAll('.kb-col-delete').forEach(btn => {
+    btn.addEventListener('click', async (e) => {
+      e.stopPropagation();
+      const id = (btn as HTMLElement).dataset.id!;
+      if (!confirm('确定删除此知识库集合？所有文档将被清除。')) return;
+      const vs = getVectorStore();
+      await vs!.deleteCollection(id);
+      if (currentColId === id) currentColId = null;
+      if (ragCollectionId === id) {
+        ragEnabled = false;
+        ragCollectionId = null;
+        (document.querySelector('#toggleRAG') as HTMLInputElement).checked = false;
+        updateRagBadge();
+      }
+      showToast('集合已删除', 'success');
+      await refreshCollections();
+      await refreshDocList();
+    });
+  });
+}
+
+async function refreshDocList(): Promise {
+  const docListEl = document.querySelector('#kbDocList')!;
+  if (!currentColId) {
+    docListEl.innerHTML = '
← 选择一个知识库集合
';
+    return;
+  }
+
+  const docs = await getDocumentsInCollection(currentColId);
+  if (docs.length === 0) {
+    docListEl.innerHTML = '
此集合暂无文档，上传文件开始构建知识库
';
+    return;
+  }
+
+  docListEl.innerHTML = docs.map(d => `
+    

+      📄
+      

+        ${escapeHtml(d.filename)}
+        ${d.chunkCount} 个分块
+      

+      
+    

+  `).join('');
+
+  docListEl.querySelectorAll('.kb-doc-delete').forEach(btn => {
+    btn.addEventListener('click', async () => {
+      const docId = (btn as HTMLElement).dataset.docid!;
+      if (!confirm('确定删除此文档？')) return;
+      await removeDocumentFromKB(currentColId!, docId);
+      showToast('文档已删除', 'success');
+      await refreshCollections();
+      await refreshDocList();
+    });
+  });
+}
+
+async function createCollection(): Promise {
+  const nameInput = document.querySelector('#inputKBName') as HTMLInputElement;
+  const name = nameInput.value.trim();
+  if (!name) { showToast('请输入知识库名称', 'warning'); return; }
+  const vs = await initVectorStore();
+  const col = await vs.createCollection(name);
+  currentColId = col.id;
+  nameInput.value = '';
+  showToast(`知识库「${name}」已创建`, 'success');
+  await refreshCollections();
+  await refreshDocList();
+}
+
+async function handleDocUpload(e: Event): Promise {
+  const fileArr = Array.from((e.target as HTMLInputElement).files || []);
+  (e.target as HTMLInputElement).value = '';
+
+  if (fileArr.length === 0) return;
+
+  const embedModel = (document.querySelector('#selectEmbedModel') as HTMLSelectElement).value;
+  if (!embedModel) { showToast('请先选择一个嵌入模型', 'warning'); return; }
+
+  const progressEl = document.querySelector('#kbProgress') as HTMLElement;
+  const progressTextEl = document.querySelector('#kbProgressText')!;
+
+  let successCount = 0;
+  let failCount = 0;
+
+  for (const file of fileArr) {
+    if (file.size > 5 * 1024 * 1024) {
+      showToast(`${file.name} 超过 5MB 限制`, 'warning');
+      failCount++;
+      continue;
+    }
+
+    try {
+      progressEl.style.display = '';
+      progressTextEl.textContent = `正在处理 ${file.name}...`;
+
+      const content = await fileToText(file);
+      const result = await addDocumentToKB(
+        currentColId!, file.name, content, embedModel,
+        (done, total, msg) => {
+          progressTextEl.textContent = `${file.name}: ${msg} (${done}/${total})`;
+        }
+      );
+
+      showToast(`${file.name} 已添加到知识库（${result.chunkCount} 个分块）`, 'success');
+      successCount++;
+    } catch (err) {
+      console.error('[KB] 文档处理失败:', err);
+      showToast(`${file.name} 处理失败: ${(err as Error).message}`, 'error');
+      failCount++;
+    }
+  }
+
+  progressEl.style.display = 'none';
+
+  if (fileArr.length > 1) {
+    showToast(`上传完成：成功 ${successCount} 个，失败 ${failCount} 个`, failCount > 0 ? 'warning' : 'success');
+  }
+
+  await refreshCollections();
+  await refreshDocList();
+}
+
+async function populateEmbedModels(): Promise {
+  const select = document.querySelector('#selectEmbedModel') as HTMLSelectElement;
+  const api = state.get(KEYS.API);
+  if (!api) return;
+
+  try {
+    const data = await api.listModels();
+    select.innerHTML = '';
+    if (!data.models || data.models.length === 0) {
+      select.innerHTML = '';
+      return;
+    }
+
+    const checks = await Promise.allSettled(
+      data.models.map(async (m) => {
+        const info = await api.showModel(m.name);
+        const caps = info.capabilities || [];
+        return { name: m.name, size: m.size, isEmbed: caps.includes('embedding') };
+      })
+    );
+
+    const embedModels = checks
+      .filter(r => r.status === 'fulfilled' && r.value.isEmbed)
+      .map(r => (r as PromiseFulfilledResult<{ name: string; size?: number; isEmbed: boolean }>).value);
+
+    embedModels.forEach(m => {
+      const opt = document.createElement('option');
+      opt.value = m.name;
+      opt.textContent = m.name + (m.size ? ` (${formatSize(m.size)})` : '');
+      select.appendChild(opt);
+    });
+
+    if (embedModels.length === 0) {
+      select.innerHTML = '';
+    }
+  } catch (err) {
+    console.warn('[KB] 加载模型列表失败:', err);
+  }
+}
diff --git a/src/renderer/components/lightbox.ts b/src/renderer/components/lightbox.ts
new file mode 100644
index 0000000..9545b1c
--- /dev/null
+++ b/src/renderer/components/lightbox.ts
@@ -0,0 +1,32 @@
+/**
+ * Lightbox - 图片预览组件
+ */
+
+let lightboxEl: HTMLElement, lightboxImg: HTMLImageElement;
+
+export function initLightbox(): void {
+  lightboxEl = document.querySelector('#lightbox')!;
+  lightboxImg = document.querySelector('#lightboxImg')!;
+
+  lightboxEl.addEventListener('click', (e) => {
+    if (e.target === lightboxEl) closeLightbox();
+  });
+  document.querySelector('#lightboxClose')!.addEventListener('click', closeLightbox);
+
+  document.querySelector('#messagesContainer')?.addEventListener('click', (e) => {
+    const target = e.target as HTMLElement;
+    if ((target as HTMLImageElement).dataset.lightbox === 'true') {
+      openLightbox((target as HTMLImageElement).src);
+    }
+  });
+}
+
+export function openLightbox(src: string): void {
+  lightboxImg.src = src;
+  lightboxEl.style.display = '';
+}
+
+export function closeLightbox(): void {
+  lightboxEl.style.display = 'none';
+  lightboxImg.src = '';
+}
diff --git a/src/renderer/components/model-bar.ts b/src/renderer/components/model-bar.ts
new file mode 100644
index 0000000..04ee151
--- /dev/null
+++ b/src/renderer/components/model-bar.ts
@@ -0,0 +1,195 @@
+/**
+ * ModelBar - 模型选择栏组件
+ */
+
+import { state, KEYS } from '../state/state.js';
+import { formatSize } from '../utils/utils.js';
+import { OllamaAPI } from '../api/ollama.js';
+import { ChatDB } from '../db/chat-db.js';
+import type { OllamaModelDetail } from '../types.js';
+
+let modelSelectEl: HTMLSelectElement;
+let badgeThinkEl: HTMLElement;
+let badgeVisionEl: HTMLElement;
+let thinkCheckbox: HTMLInputElement;
+let thinkWrap: HTMLElement;
+let btnAttachImg: HTMLButtonElement;
+
+const modelCapabilityCache = new Map();
+
+export function initModelBar(): void {
+  modelSelectEl = document.querySelector('#modelSelect')!;
+  badgeThinkEl = document.querySelector('#badgeThink')!;
+  badgeVisionEl = document.querySelector('#badgeVision')!;
+  thinkCheckbox = document.querySelector('#toggleThink')!;
+  thinkWrap = document.querySelector('#thinkToggleWrap')!;
+  btnAttachImg = document.querySelector('#btnAttachImg')!;
+
+  modelSelectEl.addEventListener('change', async () => {
+    const model = modelSelectEl.value;
+    const db = state.get(KEYS.DB);
+    if (db) await db.saveSetting('selectedModel', model);
+    state.set('_defaultModel', model);
+    state.update(KEYS.CURRENT_SESSION, (session: any) => session ? ({ ...session, model }) : session);
+    if (model) {
+      await checkModelCapability(model);
+    } else {
+      setThinkAvailable(false);
+      setVisionAvailable(false);
+      badgeThinkEl.style.display = 'none';
+      badgeVisionEl.style.display = 'none';
+    }
+  });
+}
+
+export async function loadModels(): Promise {
+  const api = state.get(KEYS.API);
+  if (!api) return;
+
+  try {
+    const data = await api.listModels();
+    modelSelectEl.innerHTML = '';
+
+    if (!data.models || data.models.length === 0) {
+      modelSelectEl.innerHTML = '';
+      badgeThinkEl.style.display = 'none'; badgeVisionEl.style.display = 'none';
+      setThinkAvailable(false); setVisionAvailable(false);
+      return;
+    }
+
+    data.models
+      .sort((a, b) => {
+        const nameA = a.name.toLowerCase(), nameB = b.name.toLowerCase();
+        if (nameA !== nameB) return nameA.localeCompare(nameB);
+        return (a.size || 0) - (b.size || 0);
+      })
+      .forEach(m => {
+        const opt = document.createElement('option');
+        opt.value = m.name;
+        const diskSize = formatSize(m.size || 0);
+        opt.textContent = diskSize ? `${m.name} · ${diskSize}` : m.name;
+        modelSelectEl.appendChild(opt);
+      });
+
+    const defaultModel = state.get('_defaultModel', '');
+    if (defaultModel) modelSelectEl.value = defaultModel;
+
+    if (modelSelectEl.value) {
+      await checkModelCapability(modelSelectEl.value);
+    }
+
+    filterEmbedModels(data.models);
+  } catch (err) {
+    console.error('[ModelBar] 加载模型失败:', err);
+    modelSelectEl.innerHTML = '';
+    badgeThinkEl.style.display = 'none'; badgeVisionEl.style.display = 'none';
+    setThinkAvailable(false); setVisionAvailable(false);
+  }
+}
+
+async function filterEmbedModels(models: Array<{ name: string }>): Promise {
+  const api = state.get(KEYS.API);
+  if (!api) return;
+
+  for (const m of models) {
+    try {
+      const info = await api.showModel(m.name);
+      const caps = info.capabilities || [];
+      const isCompletion = caps.includes('completion');
+      modelCapabilityCache.set(m.name, {
+        think: caps.includes('thinking'),
+        vision: caps.includes('vision'),
+        completion: isCompletion,
+      });
+      if (!isCompletion) {
+        const opt = modelSelectEl.querySelector(`option[value="${CSS.escape(m.name)}"]`);
+        if (opt) opt.remove();
+      }
+    } catch { /* ignore */ }
+  }
+
+  if (!modelSelectEl.value && modelSelectEl.options.length > 0) {
+    modelSelectEl.value = modelSelectEl.options[0].value;
+    state.set('_defaultModel', modelSelectEl.value);
+    const db = state.get(KEYS.DB);
+    if (db) await db.saveSetting('selectedModel', modelSelectEl.value);
+    await checkModelCapability(modelSelectEl.value);
+  }
+}
+
+async function checkModelCapability(modelName: string): Promise {
+  if (modelCapabilityCache.has(modelName)) {
+    applyCapability(modelName, modelCapabilityCache.get(modelName)!);
+    return;
+  }
+
+  const api = state.get(KEYS.API);
+  if (!api) return;
+
+  try {
+    const info = await api.showModel(modelName);
+    const capabilities = info.capabilities || [];
+    const caps = {
+      think: capabilities.includes('thinking'),
+      vision: capabilities.includes('vision'),
+      completion: capabilities.includes('completion'),
+    };
+    modelCapabilityCache.set(modelName, caps);
+    applyCapability(modelName, caps);
+  } catch (err) {
+    console.warn('[ModelBar] 获取模型能力失败:', err);
+    const fallback = { think: false, vision: false, completion: true };
+    modelCapabilityCache.set(modelName, fallback);
+    applyCapability(modelName, fallback);
+  }
+}
+
+function applyCapability(_modelName: string, caps: { think: boolean; vision: boolean }): void {
+  setThinkAvailable(caps.think);
+  setVisionAvailable(caps.vision);
+  badgeThinkEl.style.display = caps.think ? '' : 'none';
+  badgeVisionEl.style.display = caps.vision ? '' : 'none';
+}
+
+function setThinkAvailable(available: boolean): void {
+  if (available) {
+    thinkCheckbox.disabled = false;
+    thinkWrap.title = 'Think 模式：启用深度推理';
+    thinkWrap.classList.remove('unavailable');
+  } else {
+    thinkCheckbox.checked = false;
+    thinkCheckbox.disabled = true;
+    thinkWrap.title = '当前模型不支持 Think 模式';
+    thinkWrap.classList.add('unavailable');
+  }
+}
+
+function setVisionAvailable(available: boolean): void {
+  if (!btnAttachImg) return;
+  if (available) {
+    btnAttachImg.disabled = false;
+    btnAttachImg.title = '上传图片';
+    btnAttachImg.classList.remove('disabled');
+  } else {
+    btnAttachImg.disabled = true;
+    btnAttachImg.title = '当前模型不支持图片分析';
+    btnAttachImg.classList.add('disabled');
+  }
+}
+
+export function isVisionAvailable(): boolean {
+  return btnAttachImg && !btnAttachImg.disabled;
+}
+
+export function getSelectedModel(): string {
+  return modelSelectEl.value;
+}
+
+export function setSelectedModel(modelName: string): void {
+  modelSelectEl.value = modelName;
+  modelSelectEl.dispatchEvent(new Event('change'));
+}
+
+export function isThinkEnabled(): boolean {
+  return thinkCheckbox.checked && !thinkCheckbox.disabled;
+}
diff --git a/src/renderer/components/preset-bar.ts b/src/renderer/components/preset-bar.ts
new file mode 100644
index 0000000..0fdac69
--- /dev/null
+++ b/src/renderer/components/preset-bar.ts
@@ -0,0 +1,187 @@
+/**
+ * PresetBar - 预设栏组件
+ */
+
+import { state, KEYS } from '../state/state.js';
+import {
+  getPresets, getActivePresetId, activatePreset,
+  createPreset, updatePreset, deletePreset
+} from '../services/preset-manager.js';
+import { showToast } from './toast.js';
+import type { Preset } from '../types.js';
+
+let presetBarEl: HTMLElement;
+let presetListEl: HTMLElement;
+let editingPresetId: string | null = null;
+
+function escapeHtml(str: string): string {
+  const map: Record = { '&': '&', '<': '<', '>': '>', '"': '"', "'": ''' };
+  return String(str).replace(/[&<>"']/g, c => map[c]);
+}
+
+export function initPresetBar(): void {
+  const modelBar = document.querySelector('.model-bar');
+  if (!modelBar) return;
+
+  const bar = document.createElement('div');
+  bar.className = 'preset-bar';
+  bar.innerHTML = `
+    

+    
+  `;
+  modelBar.after(bar);
+
+  presetBarEl = bar;
+  presetListEl = bar.querySelector('#presetList')!;
+
+  bar.querySelector('#btnAddPreset')!.addEventListener('click', () => openPresetModal());
+
+  state.on('activePresetId', renderPresetBar);
+  state.on('presets', renderPresetBar);
+
+  renderPresetBar();
+}
+
+function renderPresetBar(): void {
+  if (!presetListEl) return;
+
+  const presets = getPresets();
+  const activeId = getActivePresetId();
+
+  presetListEl.innerHTML = '';
+
+  for (const preset of presets) {
+    const chip = document.createElement('button');
+    chip.className = 'preset-chip' + (preset.id === activeId ? ' active' : '');
+    chip.title = preset.systemPrompt ? preset.systemPrompt.slice(0, 100) : '无系统提示词';
+    chip.innerHTML = `${preset.icon}${escapeHtml(preset.name)}`;
+
+    chip.addEventListener('click', () => handlePresetClick(preset.id));
+    chip.addEventListener('contextmenu', (e) => {
+      if (!preset.builtIn) {
+        e.preventDefault();
+        editingPresetId = preset.id;
+        openPresetModal(preset);
+      }
+    });
+
+    presetListEl.appendChild(chip);
+  }
+}
+
+async function handlePresetClick(presetId: string): Promise {
+  const currentId = getActivePresetId();
+  if (presetId === currentId) return;
+
+  await activatePreset(presetId);
+
+  const preset = getPresets().find(p => p.id === presetId);
+  if (preset) {
+    showToast(`已切换到 ${preset.icon} ${preset.name}`, 'success', 2000);
+  }
+}
+
+function openPresetModal(editPreset?: Preset): void {
+  const modal = document.querySelector('#presetModal') as HTMLElement;
+  const titleEl = modal.querySelector('#presetModalTitle')!;
+  const nameInput = modal.querySelector('#inputPresetName') as HTMLInputElement;
+  const iconInput = modal.querySelector('#inputPresetIcon') as HTMLInputElement;
+  const spInput = modal.querySelector('#inputPresetSystemPrompt') as HTMLTextAreaElement;
+  const tempInput = modal.querySelector('#inputPresetTemp') as HTMLInputElement;
+  const tempVal = modal.querySelector('#presetTempValue')!;
+  const ctxInput = modal.querySelector('#inputPresetNumCtx') as HTMLInputElement;
+  const thinkCheck = modal.querySelector('#togglePresetThink') as HTMLInputElement;
+  const btnSave = modal.querySelector('#btnSavePreset') as HTMLButtonElement;
+  const btnDelete = modal.querySelector('#btnDeletePreset') as HTMLElement;
+
+  if (editPreset && editPreset.id) {
+    editingPresetId = editPreset.id;
+    titleEl.textContent = '✏️ 编辑预设';
+    nameInput.value = editPreset.name;
+    iconInput.value = editPreset.icon;
+    spInput.value = editPreset.systemPrompt;
+    tempInput.value = String(editPreset.temperature ?? 0.7);
+    tempVal.textContent = (editPreset.temperature ?? 0.7).toFixed(1);
+    ctxInput.value = String(editPreset.numCtx || 24576);
+    thinkCheck.checked = editPreset.think ?? false;
+    btnDelete.style.display = editPreset.builtIn ? 'none' : '';
+    btnSave.textContent = '保存';
+  } else {
+    editingPresetId = null;
+    titleEl.textContent = '✨ 新建预设';
+    nameInput.value = '';
+    iconInput.value = '🤖';
+    spInput.value = '';
+    tempInput.value = '0.7';
+    tempVal.textContent = '0.7';
+    ctxInput.value = '24576';
+    thinkCheck.checked = false;
+    btnDelete.style.display = 'none';
+    btnSave.textContent = '创建';
+  }
+
+  modal.style.display = '';
+  nameInput.focus();
+
+  tempInput.oninput = () => {
+    tempVal.textContent = parseFloat(tempInput.value).toFixed(1);
+  };
+}
+
+export function initPresetModal(): void {
+  const modal = document.querySelector('#presetModal') as HTMLElement;
+  if (!modal) return;
+
+  modal.querySelector('#btnClosePresetModal')!.addEventListener('click', () => {
+    modal.style.display = 'none';
+  });
+  modal.addEventListener('click', (e) => {
+    if (e.target === modal) modal.style.display = 'none';
+  });
+
+  modal.querySelector('#btnSavePreset')!.addEventListener('click', async () => {
+    const name = (modal.querySelector('#inputPresetName') as HTMLInputElement).value.trim();
+    if (!name) { showToast('请输入预设名称', 'warning'); return; }
+
+    const data = {
+      name,
+      icon: (modal.querySelector('#inputPresetIcon') as HTMLInputElement).value.trim() || '🤖',
+      systemPrompt: (modal.querySelector('#inputPresetSystemPrompt') as HTMLTextAreaElement).value.trim(),
+      temperature: parseFloat((modal.querySelector('#inputPresetTemp') as HTMLInputElement).value) || 0.7,
+      numCtx: parseInt((modal.querySelector('#inputPresetNumCtx') as HTMLInputElement).value) || 24576,
+      think: (modal.querySelector('#togglePresetThink') as HTMLInputElement).checked
+    };
+
+    if (editingPresetId) {
+      await updatePreset(editingPresetId, data);
+      showToast('预设已更新', 'success', 2000);
+      if (editingPresetId === getActivePresetId()) {
+        await activatePreset(editingPresetId);
+      }
+    } else {
+      const created = await createPreset(data);
+      await activatePreset(created.id);
+      showToast(`已创建并激活 ${data.icon} ${data.name}`, 'success', 2000);
+    }
+
+    modal.style.display = 'none';
+    editingPresetId = null;
+  });
+
+  modal.querySelector('#btnDeletePreset')!.addEventListener('click', async () => {
+    if (!editingPresetId) return;
+    const preset = getPresets().find(p => p.id === editingPresetId);
+    if (!preset) return;
+
+    if (confirm(`确定删除预设 "${preset.icon} ${preset.name}" ？`)) {
+      await deletePreset(editingPresetId);
+      showToast('预设已删除', 'info', 2000);
+      modal.style.display = 'none';
+      editingPresetId = null;
+    }
+  });
+}
diff --git a/src/renderer/components/settings-modal.ts b/src/renderer/components/settings-modal.ts
new file mode 100644
index 0000000..2a7084e
--- /dev/null
+++ b/src/renderer/components/settings-modal.ts
@@ -0,0 +1,179 @@
+/**
+ * SettingsModal - 设置面板组件
+ */
+
+import { state, KEYS } from '../state/state.js';
+import { debounce } from '../utils/utils.js';
+import { encryptData, decryptData, isMetonaFile } from '../services/crypto.js';
+import { updateConnectionInfo, updateRunningModels } from './header.js';
+import { loadModels } from './model-bar.js';
+import { showToast } from './toast.js';
+import { OllamaAPI } from '../api/ollama.js';
+import { ChatDB } from '../db/chat-db.js';
+import type { ChatSession } from '../types.js';
+
+let settingsModalEl: HTMLElement;
+
+export function initSettingsModal(): void {
+  settingsModalEl = document.querySelector('#settingsModal')!;
+
+  document.querySelector('#btnSettings')!.addEventListener('click', openSettingsModal);
+  document.querySelector('#btnCloseSettings')!.addEventListener('click', closeSettingsModal);
+  settingsModalEl.addEventListener('click', (e) => {
+    if (e.target === settingsModalEl) closeSettingsModal();
+  });
+
+  const saveServerUrl = debounce(async () => {
+    const url = (document.querySelector('#inputServerUrl') as HTMLInputElement).value.trim();
+    if (!url) return;
+    const db = state.get(KEYS.DB);
+    const api = new OllamaAPI(url);
+    state.set(KEYS.API, api);
+    if (db) await db.saveSetting('serverUrl', url);
+    updateConnectionInfo();
+    loadModels();
+  }, 500);
+  document.querySelector('#inputServerUrl')!.addEventListener('input', saveServerUrl);
+
+  document.querySelector('#toggleSystemPrompt')!.addEventListener('change', async (e) => {
+    const db = state.get(KEYS.DB);
+    state.set(KEYS.SYSTEM_PROMPT_ENABLED, (e.target as HTMLInputElement).checked);
+    (document.querySelector('#inputSystemPrompt') as HTMLTextAreaElement).disabled = !(e.target as HTMLInputElement).checked;
+    if (db) await db.saveSetting('systemPromptEnabled', (e.target as HTMLInputElement).checked);
+  });
+
+  const saveSystemPrompt = debounce(async () => {
+    const db = state.get(KEYS.DB);
+    const val = (document.querySelector('#inputSystemPrompt') as HTMLTextAreaElement).value.trim();
+    state.set(KEYS.SYSTEM_PROMPT, val);
+    if (db) await db.saveSetting('systemPrompt', val);
+  }, 500);
+  document.querySelector('#inputSystemPrompt')!.addEventListener('input', saveSystemPrompt);
+
+  const saveNumCtx = debounce(async () => {
+    const db = state.get(KEYS.DB);
+    const val = (document.querySelector('#inputNumCtx') as HTMLInputElement).value.trim();
+    const numCtx = val ? parseInt(val) : 24576;
+    state.set(KEYS.NUM_CTX, numCtx);
+    if (db) await db.saveSetting('numCtx', numCtx);
+  }, 500);
+  document.querySelector('#inputNumCtx')!.addEventListener('input', saveNumCtx);
+
+  const tempSlider = document.querySelector('#inputTemperature') as HTMLInputElement;
+  const tempDisplay = document.querySelector('#tempValue')!;
+  tempSlider.addEventListener('input', () => {
+    tempDisplay.textContent = parseFloat(tempSlider.value).toFixed(1);
+  });
+  const saveTemperature = debounce(async () => {
+    const db = state.get(KEYS.DB);
+    const val = parseFloat(tempSlider.value);
+    state.set('temperature', val);
+    if (db) await db.saveSetting('temperature', val);
+  }, 300);
+  tempSlider.addEventListener('change', saveTemperature);
+
+  document.querySelector('#btnReleaseVRAM')!.addEventListener('click', async () => {
+    const api = state.get(KEYS.API);
+    const model = (document.querySelector('#modelSelect') as HTMLSelectElement).value;
+    try {
+      await api!.chat({ model: model || 'any', messages: [], keep_alive: 0 } as any);
+      showToast('显存已释放', 'success');
+      updateRunningModels();
+    } catch (err) {
+      showToast(`释放失败: ${(err as Error).message}`, 'error');
+    }
+  });
+
+  document.querySelector('#btnClearAllHistory')!.addEventListener('click', async () => {
+    const db = state.get(KEYS.DB);
+    if (confirm('确定清空所有历史记录？此操作不可恢复！')) {
+      await db!.clearAll();
+      (document.querySelector('#btnNewChat') as HTMLElement).click();
+      showToast('已清空所有历史记录', 'success');
+    }
+  });
+
+  document.querySelector('#btnExportAll')!.addEventListener('click', exportAllSessions);
+
+  const importFileInput = document.querySelector('#importFileInput') as HTMLInputElement;
+  document.querySelector('#btnImportSessions')!.addEventListener('click', () => importFileInput.click());
+  importFileInput.addEventListener('change', (e) => {
+    if ((e.target as HTMLInputElement).files!.length > 0) {
+      importSessions((e.target as HTMLInputElement).files![0]);
+      (e.target as HTMLInputElement).value = '';
+    }
+  });
+}
+
+export function openSettingsModal(): void {
+  settingsModalEl.style.display = '';
+  (document.querySelector('#inputServerUrl') as HTMLInputElement).value = state.get(KEYS.API)?.baseUrl || '';
+  updateConnectionInfo();
+  updateRunningModels();
+}
+
+export function closeSettingsModal(): void {
+  settingsModalEl.style.display = 'none';
+}
+
+async function exportAllSessions(): Promise {
+  const db = state.get(KEYS.DB);
+  if (!db) return;
+  const sessions = await db.getAllSessions();
+  if (sessions.length === 0) {
+    showToast('没有可导出的会话', 'warning');
+    return;
+  }
+
+  const backup = {
+    app: 'Metona Ollama Client',
+    version: 1,
+    exportedAt: new Date().toISOString(),
+    count: sessions.length,
+    sessions
+  };
+
+  try {
+    const blob = await encryptData(backup);
+    const ts = new Date().toISOString().slice(0, 10);
+    const a = document.createElement('a');
+    a.href = URL.createObjectURL(blob);
+    a.download = `metona-backup-${ts}.metona`;
+    a.click();
+    showToast(`已导出 ${sessions.length} 个会话（已加密）`, 'success');
+  } catch (err) {
+    console.error('[Settings] 导出失败:', err);
+    showToast(`导出失败: ${(err as Error).message}`, 'error');
+  }
+}
+
+async function importSessions(file: File): Promise {
+  const db = state.get(KEYS.DB);
+  if (!db) return;
+
+  if (!isMetonaFile(file)) {
+    showToast('仅支持导入 .metona 格式文件', 'error');
+    return;
+  }
+
+  try {
+    const buffer = await file.arrayBuffer();
+    const data = await decryptData(buffer);
+
+    let sessions: ChatSession[];
+    if (Array.isArray(data)) {
+      sessions = data as ChatSession[];
+    } else if ((data as any).sessions && Array.isArray((data as any).sessions)) {
+      sessions = (data as any).sessions;
+    } else {
+      showToast('文件内容格式错误：未找到会话数据', 'error');
+      return;
+    }
+
+    const result = await db.importSessions(sessions);
+    showToast(`导入完成：${result.imported} 个会话${result.skipped > 0 ? `，跳过 ${result.skipped} 个` : ''}`, 'success', 4000);
+  } catch (err) {
+    console.error('[Settings] 导入失败:', err);
+    showToast(`导入失败: ${(err as Error).message}`, 'error');
+  }
+}
diff --git a/src/renderer/components/toast.ts b/src/renderer/components/toast.ts
new file mode 100644
index 0000000..135cc2e
--- /dev/null
+++ b/src/renderer/components/toast.ts
@@ -0,0 +1,24 @@
+/**
+ * Toast - 通知组件
+ */
+
+let toastContainer: HTMLElement | null = null;
+
+export function initToast(): void {
+  toastContainer = document.querySelector('#toastContainer');
+}
+
+export function showToast(text: string, type: 'info' | 'success' | 'warning' | 'error' = 'info', duration = 3000): void {
+  if (!toastContainer) return;
+
+  const iconMap: Record = { success: '✓', error: '✗', warning: '⚠', info: 'ℹ' };
+  const toast = document.createElement('div');
+  toast.className = `toast ${type}`;
+  toast.innerHTML = `${iconMap[type] || 'ℹ'}${text}`;
+  toastContainer.appendChild(toast);
+
+  setTimeout(() => {
+    toast.classList.add('removing');
+    toast.addEventListener('animationend', () => toast.remove());
+  }, duration);
+}
diff --git a/src/renderer/db/chat-db.ts b/src/renderer/db/chat-db.ts
new file mode 100644
index 0000000..180a46e
--- /dev/null
+++ b/src/renderer/db/chat-db.ts
@@ -0,0 +1,154 @@
+/**
+ * ChatDB - IndexedDB 封装层
+ */
+
+import type { ChatSession } from '../types.js';
+
+export class ChatDB {
+  private dbName: string;
+  private version: number;
+  private db: IDBDatabase | null = null;
+
+  constructor(dbName = 'metona-ollama', version = 1) {
+    this.dbName = dbName;
+    this.version = version;
+  }
+
+  async init(): Promise {
+    return new Promise((resolve, reject) => {
+      const request = indexedDB.open(this.dbName, this.version);
+      request.onerror = () => {
+        console.error('[ChatDB] 数据库打开失败:', request.error);
+        reject(request.error);
+      };
+      request.onsuccess = () => {
+        this.db = request.result;
+        console.log('[ChatDB] 数据库已连接');
+        resolve();
+      };
+      request.onupgradeneeded = (event) => {
+        const db = (event.target as IDBOpenDBRequest).result;
+        if (!db.objectStoreNames.contains('sessions')) {
+          const sessionStore = db.createObjectStore('sessions', { keyPath: 'id' });
+          sessionStore.createIndex('updatedAt', 'updatedAt', { unique: false });
+          sessionStore.createIndex('model', 'model', { unique: false });
+        }
+        if (!db.objectStoreNames.contains('settings')) {
+          db.createObjectStore('settings', { keyPath: 'key' });
+        }
+      };
+    });
+  }
+
+  private _ensureDB(): void {
+    if (!this.db) throw new Error('数据库未初始化，请先调用 init()');
+  }
+
+  private _tx(storeName: string, mode: IDBTransactionMode = 'readonly'): IDBObjectStore {
+    this._ensureDB();
+    const tx = this.db!.transaction(storeName, mode);
+    return tx.objectStore(storeName);
+  }
+
+  async saveSession(session: ChatSession): Promise {
+    return new Promise((resolve, reject) => {
+      const store = this._tx('sessions', 'readwrite');
+      const request = store.put(session);
+      request.onsuccess = () => resolve(session.id);
+      request.onerror = () => reject(request.error);
+    });
+  }
+
+  async getSession(id: string): Promise {
+    return new Promise((resolve, reject) => {
+      const store = this._tx('sessions');
+      const request = store.get(id);
+      request.onsuccess = () => resolve(request.result || null);
+      request.onerror = () => reject(request.error);
+    });
+  }
+
+  async getAllSessions(): Promise {
+    return new Promise((resolve, reject) => {
+      const store = this._tx('sessions');
+      const request = store.getAll();
+      request.onsuccess = () => resolve(request.result || []);
+      request.onerror = () => reject(request.error);
+    });
+  }
+
+  async deleteSession(id: string): Promise {
+    return new Promise((resolve, reject) => {
+      const store = this._tx('sessions', 'readwrite');
+      const request = store.delete(id);
+      request.onsuccess = () => resolve();
+      request.onerror = () => reject(request.error);
+    });
+  }
+
+  async clearAll(): Promise {
+    return new Promise((resolve, reject) => {
+      const store = this._tx('sessions', 'readwrite');
+      const request = store.clear();
+      request.onsuccess = () => resolve();
+      request.onerror = () => reject(request.error);
+    });
+  }
+
+  async importSessions(sessions: ChatSession[]): Promise<{ imported: number; skipped: number }> {
+    return new Promise((resolve, reject) => {
+      const tx = this.db!.transaction('sessions', 'readwrite');
+      const store = tx.objectStore('sessions');
+      let imported = 0;
+      let skipped = 0;
+
+      tx.oncomplete = () => resolve({ imported, skipped });
+      tx.onerror = () => reject(tx.error);
+
+      for (const session of sessions) {
+        if (!session.id || !Array.isArray(session.messages)) {
+          skipped++;
+          continue;
+        }
+        const getRequest = store.get(session.id);
+        getRequest.onsuccess = () => {
+          if (getRequest.result) {
+            skipped++;
+          } else {
+            store.put(session);
+            imported++;
+          }
+        };
+      }
+    });
+  }
+
+  async getSessionsByTimeRange(startTime: number, endTime: number): Promise {
+    return new Promise((resolve, reject) => {
+      const store = this._tx('sessions');
+      const index = store.index('updatedAt');
+      const range = IDBKeyRange.bound(startTime, endTime);
+      const request = index.getAll(range);
+      request.onsuccess = () => resolve(request.result || []);
+      request.onerror = () => reject(request.error);
+    });
+  }
+
+  async saveSetting(key: string, value: unknown): Promise {
+    return new Promise((resolve, reject) => {
+      const store = this._tx('settings', 'readwrite');
+      const request = store.put({ key, value });
+      request.onsuccess = () => resolve();
+      request.onerror = () => reject(request.error);
+    });
+  }
+
+  async getSetting(key: string, defaultValue: T | null = null): Promise {
+    return new Promise((resolve, reject) => {
+      const store = this._tx('settings');
+      const request = store.get(key);
+      request.onsuccess = () => resolve(request.result ? request.result.value : defaultValue);
+      request.onerror = () => reject(request.error);
+    });
+  }
+}
diff --git a/src/renderer/index.html b/src/renderer/index.html
new file mode 100644
index 0000000..9e1ef0d
--- /dev/null
+++ b/src/renderer/index.html
@@ -0,0 +1,379 @@
+
+
+
+    
+    
+    
+    
+    
+    Metona Ollama
+
+
+

+
+    
+    

+        

+            
+            Metona Ollama
+            v2.0.0
+            
+        

+        

+            

+                
+                未连接
+            

+            
+            
+            
+            
+        

+    

+
+    
+    

+        

+            
+                
+                
+            
+        

+        

+            
+            
+                
+            
+        

+        

+            
+            
+            
+        

+    

+
+    
+    

+        

+            

+                
+                    
+                    
+                    
+                    
+                    
+                    
+                
+            

+            
开始对话

+            
选择一个模型，输入消息开始聊天

+        

+        
+        
+    

+
+    
+    
+
+    
+    

+        
+        
+        

+            
+            
+            
+            
+            
+            
+            
+        

+    

+

+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+

+
+
+
+
+
diff --git a/src/renderer/main.ts b/src/renderer/main.ts
new file mode 100644
index 0000000..7adcfb8
--- /dev/null
+++ b/src/renderer/main.ts
@@ -0,0 +1,243 @@
+/**
+ * App - 主入口模块
+ * 负责初始化所有组件、协调事件流、管理生命周期
+ */
+
+import '../styles/style.css';
+import './types.js';
+
+import { ChatDB } from './db/chat-db.js';
+import { OllamaAPI } from './api/ollama.js';
+import { state, KEYS } from './state/state.js';
+import { generateId } from './utils/utils.js';
+
+// 组件
+import { initToast, showToast } from './components/toast.js';
+import { initLightbox, closeLightbox } from './components/lightbox.js';
+import { initHeader, checkConnection } from './components/header.js';
+import { initModelBar, loadModels, setSelectedModel } from './components/model-bar.js';
+import { initChatArea, renderMessages, clearMessages, enableAutoScroll } from './components/chat-area.js';
+import { initInputArea } from './components/input-area.js';
+import { initSettingsModal, closeSettingsModal } from './components/settings-modal.js';
+import { initHistoryModal, closeHistoryModal } from './components/history-modal.js';
+import { initKBModal } from './components/kb-modal.js';
+import { initPresetBar, initPresetModal } from './components/preset-bar.js';
+import { initPresetManager } from './services/preset-manager.js';
+import { initVectorStore } from './services/rag.js';
+import type { ChatSession } from './types.js';
+
+function initHelpModal(): void {
+  const helpModal = document.querySelector('#helpModal') as HTMLElement;
+  document.querySelector('#btnHelp')!.addEventListener('click', () => {
+    helpModal.style.display = '';
+  });
+  document.querySelector('#btnCloseHelp')!.addEventListener('click', () => {
+    helpModal.style.display = 'none';
+  });
+  helpModal.addEventListener('click', (e) => {
+    if (e.target === helpModal) helpModal.style.display = 'none';
+  });
+}
+
+function setupDesktopIntegration(): void {
+  const bridge = window.__metonaBridge;
+  if (!bridge || !bridge.isDesktop) return;
+
+  console.log('[Desktop Integration] 初始化桌面集成...');
+
+  bridge.onMenuAction((action: string) => {
+    switch (action) {
+      case 'new-chat': document.querySelector('#btnNewChat')?.dispatchEvent(new Event('click')); break;
+      case 'import': document.querySelector('#btnImportSessions')?.dispatchEvent(new Event('click')); break;
+      case 'export': document.querySelector('#btnExportAll')?.dispatchEvent(new Event('click')); break;
+      case 'help': document.querySelector('#btnHelp')?.dispatchEvent(new Event('click')); break;
+    }
+  });
+
+  bridge.onTrayAction((action: string) => {
+    switch (action) {
+      case 'new-chat': document.querySelector('#btnNewChat')?.dispatchEvent(new Event('click')); break;
+    }
+  });
+
+  // 标题更新
+  window.addEventListener('metona:model-changed', ((e: CustomEvent) => {
+    if (e.detail?.model) {
+      document.title = `${e.detail.model} - Metona Ollama`;
+    } else {
+      document.title = 'Metona Ollama';
+    }
+  }) as EventListener);
+
+  // 桌面端快捷键
+  document.addEventListener('keydown', (e) => {
+    if (e.ctrlKey && e.key === 'n') {
+      e.preventDefault();
+      document.querySelector('#btnNewChat')?.dispatchEvent(new Event('click'));
+    }
+  });
+
+  console.log('[Desktop Integration] 桌面集成完成 ✓');
+}
+
+console.log('[Metona] TypeScript + Electron v2.0.0 ' + new Date().toISOString());
+
+function createNewSession(): ChatSession {
+  const selectedModel = (document.querySelector('#modelSelect') as HTMLSelectElement)?.value || '';
+  const defaultModel = selectedModel || state.get('_defaultModel', '');
+  return {
+    id: generateId(),
+    title: '新会话',
+    model: defaultModel,
+    messages: [],
+    createdAt: Date.now(),
+    updatedAt: Date.now()
+  };
+}
+
+async function startNewSession(): Promise {
+  const db = state.get(KEYS.DB);
+  const currentSession = state.get(KEYS.CURRENT_SESSION);
+  if (db && currentSession && currentSession.messages.length > 0) {
+    currentSession.updatedAt = Date.now();
+    await db.saveSession(currentSession);
+  }
+
+  const api = state.get(KEYS.API);
+  const model = currentSession?.model || state.get('_defaultModel', '');
+  if (api && model) {
+    try {
+      await api.chat({ model, messages: [], keep_alive: 0 } as any);
+    } catch (e) {
+      console.warn('[App] 释放显存失败:', e);
+    }
+  }
+
+  const session = createNewSession();
+  state.set(KEYS.CURRENT_SESSION, session);
+  state.set(KEYS.IS_HISTORY_VIEW, false);
+
+  (document.querySelector('#historyBar') as HTMLElement).style.display = 'none';
+  (document.querySelector('#inputArea') as HTMLElement).style.display = '';
+
+  clearMessages();
+  enableAutoScroll();
+  renderMessages();
+  (document.querySelector('#chatInput') as HTMLElement)?.focus();
+}
+
+async function init(): Promise {
+  let db: ChatDB | undefined;
+  let api: OllamaAPI;
+
+  try {
+    db = new ChatDB();
+    await db.init();
+    state.set(KEYS.DB, db);
+
+    const serverUrl = await db.getSetting('serverUrl', 'http://127.0.0.1:11434');
+    api = new OllamaAPI(serverUrl);
+    state.set(KEYS.API, api);
+
+    state.set(KEYS.CURRENT_SESSION, createNewSession());
+    state.set(KEYS.IS_STREAMING, false);
+    state.set(KEYS.IS_HISTORY_VIEW, false);
+    state.set(KEYS.NUM_CTX, 24576);
+
+    initToast();
+    initLightbox();
+    initHeader();
+    initModelBar();
+    initChatArea();
+    initInputArea();
+    initSettingsModal();
+    initHistoryModal();
+    initKBModal();
+    initPresetBar();
+    initPresetModal();
+    initHelpModal();
+    setupDesktopIntegration();
+
+    bindGlobalEvents();
+
+    await checkConnection();
+    await loadModels();
+    await initVectorStore();
+    await initPresetManager();
+
+    const savedModel = await db.getSetting('selectedModel', '');
+    if (savedModel) {
+      setSelectedModel(savedModel);
+      state.set('_defaultModel', savedModel);
+      await db.saveSetting('selectedModel', savedModel);
+    }
+
+    const systemPromptEnabled = await db.getSetting('systemPromptEnabled', false);
+    const systemPrompt = await db.getSetting('systemPrompt', '');
+    const numCtx = await db.getSetting('numCtx', 24576);
+    const temperature = await db.getSetting('temperature', 0.7);
+
+    state.set(KEYS.SYSTEM_PROMPT_ENABLED, systemPromptEnabled);
+    state.set(KEYS.SYSTEM_PROMPT, systemPrompt);
+    state.set(KEYS.NUM_CTX, numCtx);
+    state.set('temperature', temperature);
+
+    (document.querySelector('#toggleSystemPrompt') as HTMLInputElement).checked = systemPromptEnabled;
+    (document.querySelector('#inputSystemPrompt') as HTMLTextAreaElement).disabled = !systemPromptEnabled;
+    (document.querySelector('#inputSystemPrompt') as HTMLTextAreaElement).value = systemPrompt;
+    (document.querySelector('#inputNumCtx') as HTMLInputElement).value = String(numCtx);
+    (document.querySelector('#inputTemperature') as HTMLInputElement).value = String(temperature);
+    document.querySelector('#tempValue')!.textContent = parseFloat(temperature).toFixed(1);
+
+    (document.querySelector('#chatInput') as HTMLElement)?.focus();
+
+    console.log('[App] 初始化完成');
+  } catch (err) {
+    console.error('[App] 初始化失败:', err);
+    if (!api!) {
+      api = new OllamaAPI();
+      state.set(KEYS.API, api);
+    }
+    state.set(KEYS.CURRENT_SESSION, createNewSession());
+    bindGlobalEvents();
+    initToast();
+    initLightbox();
+    initHeader();
+    initModelBar();
+    initChatArea();
+    initInputArea();
+    initSettingsModal();
+    initHistoryModal();
+    initPresetBar();
+    initPresetModal();
+    setupDesktopIntegration();
+    checkConnection().then(loadModels);
+  }
+}
+
+function bindGlobalEvents(): void {
+  document.querySelector('#btnNewChat')?.addEventListener('click', startNewSession);
+
+  document.addEventListener('keydown', (e) => {
+    if (e.key === 'Escape') {
+      closeSettingsModal();
+      closeHistoryModal();
+      closeLightbox();
+      (document.querySelector('#helpModal') as HTMLElement).style.display = 'none';
+      (document.querySelector('#kbModal') as HTMLElement).style.display = 'none';
+    }
+  });
+
+  window.addEventListener('error', (e) => {
+    console.error('[App] 未捕获错误:', e.error || e.message);
+    showToast(`发生错误: ${e.message}`, 'error', 5000);
+  });
+
+  window.addEventListener('unhandledrejection', (e) => {
+    console.error('[App] 未处理 Promise 拒绝:', e.reason);
+    const msg = e.reason?.message || String(e.reason);
+    showToast(`操作失败: ${msg}`, 'error', 5000);
+  });
+}
+
+init();
diff --git a/src/renderer/services/crypto.ts b/src/renderer/services/crypto.ts
new file mode 100644
index 0000000..f335d51
--- /dev/null
+++ b/src/renderer/services/crypto.ts
@@ -0,0 +1,163 @@
+/**
+ * Crypto - Metona 会话加密模块
+ */
+
+const MAGIC = new TextEncoder().encode('METONA1\0');
+const PASSPHRASE = 'metona-ollama-v2';
+const PBKDF2_ITERATIONS = 100000;
+
+const SECURE = !!(globalThis.crypto && globalThis.crypto.subtle);
+
+async function sha256(data: Uint8Array): Promise {
+  if (SECURE) {
+    const buf = await crypto.subtle.digest('SHA-256', data);
+    return new Uint8Array(buf);
+  }
+  return sha256js(data);
+}
+
+function sha256js(message: Uint8Array): Uint8Array {
+  const K = new Uint32Array([
+    0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5, 0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5,
+    0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3, 0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174,
+    0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc, 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da,
+    0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7, 0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967,
+    0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13, 0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85,
+    0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3, 0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070,
+    0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5, 0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3,
+    0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208, 0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2
+  ]);
+
+  const bytes = message instanceof Uint8Array ? message : new Uint8Array(message);
+  const bitLen = bytes.length * 8;
+  const paddedLen = Math.ceil((bytes.length + 9) / 64) * 64;
+  const padded = new Uint8Array(paddedLen);
+  padded.set(bytes);
+  padded[bytes.length] = 0x80;
+  const view = new DataView(padded.buffer);
+  view.setUint32(paddedLen - 4, bitLen, false);
+
+  let h0 = 0x6a09e667, h1 = 0xbb67ae85, h2 = 0x3c6ef372, h3 = 0xa54ff53a;
+  let h4 = 0x510e527f, h5 = 0x9b05688c, h6 = 0x1f83d9ab, h7 = 0x5be0cd19;
+
+  const w = new Uint32Array(64);
+
+  for (let offset = 0; offset < paddedLen; offset += 64) {
+    for (let i = 0; i < 16; i++) w[i] = view.getUint32(offset + i * 4, false);
+    for (let i = 16; i < 64; i++) {
+      const s0 = (w[i - 15] >>> 7 | w[i - 15] << 25) ^ (w[i - 15] >>> 18 | w[i - 15] << 14) ^ (w[i - 15] >>> 3);
+      const s1 = (w[i - 2] >>> 17 | w[i - 2] << 15) ^ (w[i - 2] >>> 19 | w[i - 2] << 13) ^ (w[i - 2] >>> 10);
+      w[i] = (w[i - 16] + s0 + w[i - 7] + s1) >>> 0;
+    }
+    let a = h0, b = h1, c = h2, d = h3, e = h4, f = h5, g = h6, h = h7;
+    for (let i = 0; i < 64; i++) {
+      const S1 = (e >>> 6 | e << 26) ^ (e >>> 11 | e << 21) ^ (e >>> 25 | e << 7);
+      const ch = (e & f) ^ (~e & g);
+      const temp1 = (h + S1 + ch + K[i] + w[i]) >>> 0;
+      const S0 = (a >>> 2 | a << 30) ^ (a >>> 13 | a << 19) ^ (a >>> 22 | a << 10);
+      const maj = (a & b) ^ (a & c) ^ (b & c);
+      const temp2 = (S0 + maj) >>> 0;
+      h = g; g = f; f = e;
+      e = (d + temp1) >>> 0;
+      d = c; c = b; b = a;
+      a = (temp1 + temp2) >>> 0;
+    }
+    h0 = (h0 + a) >>> 0; h1 = (h1 + b) >>> 0; h2 = (h2 + c) >>> 0; h3 = (h3 + d) >>> 0;
+    h4 = (h4 + e) >>> 0; h5 = (h5 + f) >>> 0; h6 = (h6 + g) >>> 0; h7 = (h7 + h) >>> 0;
+  }
+
+  const result = new Uint8Array(32);
+  const rv = new DataView(result.buffer);
+  rv.setUint32(0, h0, false); rv.setUint32(4, h1, false);
+  rv.setUint32(8, h2, false); rv.setUint32(12, h3, false);
+  rv.setUint32(16, h4, false); rv.setUint32(20, h5, false);
+  rv.setUint32(24, h6, false); rv.setUint32(28, h7, false);
+  return result;
+}
+
+async function deriveKeyBytes(salt: Uint8Array): Promise {
+  const passBytes = new TextEncoder().encode(PASSPHRASE);
+  const input = new Uint8Array(passBytes.length + salt.length);
+  input.set(passBytes);
+  input.set(salt, passBytes.length);
+
+  if (SECURE) {
+    const keyMaterial = await crypto.subtle.importKey('raw', passBytes, 'PBKDF2', false, ['deriveKey']);
+    const key = await crypto.subtle.deriveKey(
+      { name: 'PBKDF2', salt, iterations: PBKDF2_ITERATIONS, hash: 'SHA-256' },
+      keyMaterial,
+      { name: 'AES-GCM', length: 256 },
+      true,
+      ['encrypt', 'decrypt']
+    );
+    const raw = await crypto.subtle.exportKey('raw', key);
+    return new Uint8Array(raw);
+  }
+
+  let key = input;
+  for (let i = 0; i < 10000; i++) {
+    key = await sha256(key);
+  }
+  return key;
+}
+
+function xorBytes(data: Uint8Array, keyBytes: Uint8Array): Uint8Array {
+  const out = new Uint8Array(data.length);
+  for (let i = 0; i < data.length; i++) {
+    out[i] = data[i] ^ keyBytes[i % keyBytes.length];
+  }
+  return out;
+}
+
+export async function encryptData(data: unknown): Promise {
+  const json = new TextEncoder().encode(JSON.stringify(data));
+  const salt = crypto.getRandomValues(new Uint8Array(16));
+  const iv = crypto.getRandomValues(new Uint8Array(12));
+  const keyBytes = await deriveKeyBytes(salt);
+
+  let payload: Uint8Array;
+  if (SECURE) {
+    const key = await crypto.subtle.importKey('raw', keyBytes, 'AES-GCM', false, ['encrypt']);
+    const ciphertext = await crypto.subtle.encrypt({ name: 'AES-GCM', iv }, key, json);
+    payload = new Uint8Array(ciphertext);
+  } else {
+    const lenBytes = new Uint32Array([json.length]);
+    const withLen = new Uint8Array(4 + json.length);
+    withLen.set(new Uint8Array(lenBytes.buffer));
+    withLen.set(json, 4);
+    payload = xorBytes(withLen, keyBytes);
+  }
+
+  const flag = new Uint8Array([SECURE ? 1 : 0]);
+  return new Blob([MAGIC, salt, iv, flag, payload]);
+}
+
+export async function decryptData(buffer: ArrayBuffer): Promise {
+  const data = new Uint8Array(buffer);
+  for (let i = 0; i < 8; i++) {
+    if (data[i] !== MAGIC[i]) throw new Error('不是有效的 .metona 文件');
+  }
+
+  const salt = data.slice(8, 24);
+  const iv = data.slice(24, 36);
+  const mode = data[36];
+  const payload = data.slice(37);
+  const keyBytes = await deriveKeyBytes(salt);
+
+  let jsonBytes: Uint8Array;
+  if (mode === 1) {
+    const key = await crypto.subtle.importKey('raw', keyBytes, 'AES-GCM', false, ['decrypt']);
+    const decrypted = await crypto.subtle.decrypt({ name: 'AES-GCM', iv }, key, payload);
+    jsonBytes = new Uint8Array(decrypted);
+  } else {
+    const withLen = xorBytes(payload, keyBytes);
+    const len = new DataView(withLen.buffer).getUint32(0, true);
+    jsonBytes = withLen.slice(4, 4 + len);
+  }
+
+  return JSON.parse(new TextDecoder().decode(jsonBytes));
+}
+
+export function isMetonaFile(file: File): boolean {
+  return file.name.endsWith('.metona');
+}
diff --git a/src/renderer/services/document-processor.ts b/src/renderer/services/document-processor.ts
new file mode 100644
index 0000000..81ac8a3
--- /dev/null
+++ b/src/renderer/services/document-processor.ts
@@ -0,0 +1,74 @@
+/**
+ * DocumentProcessor - 文档分块处理
+ */
+
+export function chunkText(text: string, { maxChunkSize = 1500, overlap = 200 } = {}): string[] {
+  if (!text || text.trim().length === 0) return [];
+
+  const paragraphs = text.split(/\n\s*\n/).filter(p => p.trim());
+  const chunks: string[] = [];
+  let current = '';
+
+  for (const para of paragraphs) {
+    const trimmed = para.trim();
+    if (!trimmed) continue;
+
+    if (trimmed.length > maxChunkSize) {
+      if (current) {
+        chunks.push(current.trim());
+        current = '';
+      }
+      const sentences = splitSentences(trimmed);
+      let sentenceBuf = '';
+      for (const sent of sentences) {
+        if ((sentenceBuf + sent).length > maxChunkSize && sentenceBuf) {
+          chunks.push(sentenceBuf.trim());
+          sentenceBuf = overlap > 0 ? sentenceBuf.slice(-overlap) + sent : sent;
+        } else {
+          sentenceBuf += sent;
+        }
+      }
+      if (sentenceBuf.trim()) {
+        current = sentenceBuf;
+      }
+      continue;
+    }
+
+    if ((current + '\n\n' + trimmed).length > maxChunkSize && current) {
+      chunks.push(current.trim());
+      if (overlap > 0 && current.length > overlap) {
+        current = current.slice(-overlap) + '\n\n' + trimmed;
+      } else {
+        current = trimmed;
+      }
+    } else {
+      current = current ? current + '\n\n' + trimmed : trimmed;
+    }
+  }
+
+  if (current.trim()) {
+    chunks.push(current.trim());
+  }
+
+  return chunks;
+}
+
+function splitSentences(text: string): string[] {
+  const parts = text.split(/(?<=[。！？.!?])\s*/);
+  return parts.filter(p => p.trim()).map(p => p.trim() + ' ');
+}
+
+export function extractDocument(content: string, filename: string): { text: string; filename: string } {
+  return { text: content, filename };
+}
+
+export function createChunkMetadata(chunk: string, index: number, docId: string, filename: string) {
+  return {
+    id: `${docId}_chunk_${index}`,
+    docId,
+    filename,
+    chunkIndex: index,
+    text: chunk,
+    charCount: chunk.length
+  };
+}
diff --git a/src/renderer/services/preset-manager.ts b/src/renderer/services/preset-manager.ts
new file mode 100644
index 0000000..49b1280
--- /dev/null
+++ b/src/renderer/services/preset-manager.ts
@@ -0,0 +1,179 @@
+/**
+ * PresetManager - Agent 预设管理
+ */
+
+import { state, KEYS } from '../state/state.js';
+import { generateId } from '../utils/utils.js';
+import type { Preset, ChatDB } from '../types.js';
+
+const PRESETS_KEY = 'agentPresets';
+const ACTIVE_PRESET_KEY = 'activePresetId';
+
+const BUILT_IN_PRESETS: Preset[] = [
+  { id: '_default', name: '默认', icon: '💬', systemPrompt: '', temperature: 0.7, numCtx: 24576, think: false, builtIn: true, createdAt: 0, updatedAt: 0 },
+  { id: '_translator', name: '翻译官', icon: '🌐', systemPrompt: '你是一位专业翻译官。你的任务是将用户输入的内容准确翻译为目标语言。\n\n规则：\n1. 自动识别源语言，翻译为用户指定的目标语言（如未指定则翻译为中文）\n2. 保持原文的格式、语气和风格\n3. 专有名词保留原文并给出通用译名\n4. 对于有多种含义的词语，结合上下文选择最合适的翻译\n5. 直接输出翻译结果，不需要额外解释（除非用户要求）', temperature: 0.3, numCtx: 16384, think: false, builtIn: true, createdAt: 0, updatedAt: 0 },
+  { id: '_code_review', name: '代码审查', icon: '🔍', systemPrompt: '你是一位资深代码审查专家。对用户提交的代码进行全面审查。\n\n审查维度：\n1. **Bug 与逻辑错误** — 潜在的运行时错误、边界条件、空指针等\n2. **安全性** — SQL注入、XSS、敏感信息泄露等安全隐患\n3. **性能** — 时间/空间复杂度、不必要的计算、内存泄漏\n4. **可读性** — 命名规范、代码结构、注释质量\n5. **最佳实践** — 设计模式、语言惯用法、框架约定\n\n输出格式：\n- 按严重程度排列问题（严重 → 轻微）\n- 每个问题给出：位置、问题描述、修复建议、改进后的代码\n- 最后给出整体评价和改进建议', temperature: 0.2, numCtx: 32768, think: true, builtIn: true, createdAt: 0, updatedAt: 0 },
+  { id: '_writer', name: '写作助手', icon: '✍️', systemPrompt: '你是一位才华横溢的写作助手。擅长多种文体和写作风格。\n\n能力范围：\n1. 文章撰写 — 议论文、说明文、散文、故事\n2. 文案创作 — 广告文案、产品描述、社交媒体文案\n3. 内容润色 — 修改语法、优化措辞、提升表达力\n4. 风格调整 — 正式/口语/文艺/简洁等多种风格\n5. 创意写作 — 小说、诗歌、剧本、对话\n\n工作方式：\n- 仔细理解用户的写作需求（读者、用途、风格偏好）\n- 如需信息不全，主动询问确认\n- 提供多种版本供选择\n- 解释重要的写作决策', temperature: 0.9, numCtx: 24576, think: false, builtIn: true, createdAt: 0, updatedAt: 0 },
+  { id: '_analyst', name: '数据分析师', icon: '📊', systemPrompt: '你是一位专业的数据分析师。擅长从数据中提取洞察并给出可执行的建议。\n\n分析方法：\n1. 数据概览 — 数据量、字段类型、缺失值、异常值\n2. 统计分析 — 描述性统计、相关性分析、趋势分析\n3. 可视化建议 — 推荐合适的图表类型和展示方式\n4. 洞察提取 — 关键发现、模式识别、因果推断\n5. 行动建议 — 基于数据的具体可执行建议\n\n输出格式：\n- 先给出核心结论（Executive Summary）\n- 再展开详细分析过程\n- 使用表格和列表组织数据\n- 给出代码（Python/SQL）时附带注释', temperature: 0.4, numCtx: 32768, think: true, builtIn: true, createdAt: 0, updatedAt: 0 },
+  { id: '_tutor', name: '学习导师', icon: '🎓', systemPrompt: '你是一位耐心且善于启发的学习导师。用苏格拉底式教学法帮助用户深入理解知识。\n\n教学原则：\n1. **先问后答** — 通过引导性问题帮助用户自己找到答案\n2. **由浅入深** — 从基础概念开始，逐步构建知识体系\n3. **类比教学** — 用生活中的类比解释抽象概念\n4. **实践导向** — 每个知识点配一个动手练习\n5. **鼓励探索** — 提供延伸阅读方向和思考题', temperature: 0.6, numCtx: 24576, think: true, builtIn: true, createdAt: 0, updatedAt: 0 }
+];
+
+let presets: Preset[] = [];
+let activePresetId: string | null = null;
+
+export async function initPresetManager(): Promise {
+  const db = state.get(KEYS.DB);
+
+  let userPresets: Preset[] = [];
+  if (db) {
+    userPresets = await db.getSetting(PRESETS_KEY, []);
+  }
+
+  presets = [...BUILT_IN_PRESETS, ...userPresets];
+
+  if (db) {
+    activePresetId = await db.getSetting(ACTIVE_PRESET_KEY, '_default');
+  } else {
+    activePresetId = '_default';
+  }
+
+  state.set('presets', presets);
+  state.set('activePresetId', activePresetId);
+
+  const activePreset = presets.find(p => p.id === activePresetId);
+  if (activePreset && activePreset.id !== '_default') {
+    applyPresetToState(activePreset, false);
+  }
+}
+
+export function getPresets(): Preset[] {
+  return presets;
+}
+
+export function getActivePreset(): Preset {
+  return presets.find(p => p.id === activePresetId) || presets[0];
+}
+
+export function getActivePresetId(): string | null {
+  return activePresetId;
+}
+
+export async function activatePreset(presetId: string): Promise {
+  const preset = presets.find(p => p.id === presetId);
+  if (!preset) return;
+
+  activePresetId = presetId;
+  state.set('activePresetId', presetId);
+  applyPresetToState(preset, true);
+
+  const db = state.get(KEYS.DB);
+  if (db) {
+    await db.saveSetting(ACTIVE_PRESET_KEY, presetId);
+  }
+}
+
+function applyPresetToState(preset: Preset, saveToDb: boolean): void {
+  const db = state.get(KEYS.DB);
+
+  if (preset.systemPrompt) {
+    state.set(KEYS.SYSTEM_PROMPT_ENABLED, true);
+    state.set(KEYS.SYSTEM_PROMPT, preset.systemPrompt);
+  } else {
+    state.set(KEYS.SYSTEM_PROMPT_ENABLED, false);
+    state.set(KEYS.SYSTEM_PROMPT, '');
+  }
+
+  if (preset.numCtx) state.set(KEYS.NUM_CTX, preset.numCtx);
+  state.set('temperature', preset.temperature ?? 0.7);
+  state.set('thinkEnabled', preset.think ?? false);
+
+  syncPresetToUI(preset);
+
+  if (saveToDb && db) {
+    db.saveSetting('systemPromptEnabled', !!preset.systemPrompt);
+    db.saveSetting('systemPrompt', preset.systemPrompt || '');
+    db.saveSetting('numCtx', preset.numCtx || 24576);
+    db.saveSetting('temperature', preset.temperature ?? 0.7);
+  }
+}
+
+function syncPresetToUI(preset: Preset): void {
+  const toggleSP = document.querySelector('#toggleSystemPrompt');
+  const inputSP = document.querySelector('#inputSystemPrompt');
+  if (toggleSP) toggleSP.checked = !!preset.systemPrompt;
+  if (inputSP) { inputSP.disabled = !preset.systemPrompt; inputSP.value = preset.systemPrompt || ''; }
+
+  const inputCtx = document.querySelector('#inputNumCtx');
+  if (inputCtx) inputCtx.value = String(preset.numCtx || 24576);
+
+  const tempSlider = document.querySelector('#inputTemperature');
+  const tempDisplay = document.querySelector('#tempValue');
+  if (tempSlider) tempSlider.value = String(preset.temperature ?? 0.7);
+  if (tempDisplay) tempDisplay.textContent = (preset.temperature ?? 0.7).toFixed(1);
+
+  const thinkCheckbox = document.querySelector('#toggleThink');
+  if (thinkCheckbox) {
+    const modelSupportsThink = !thinkCheckbox.disabled;
+    thinkCheckbox.checked = modelSupportsThink && (preset.think ?? false);
+  }
+}
+
+export async function createPreset(data: { name: string; icon: string; systemPrompt: string; temperature: number; numCtx: number; think: boolean }): Promise {
+  const preset: Preset = {
+    id: `preset_${generateId()}`,
+    name: data.name || '新预设',
+    icon: data.icon || '🤖',
+    systemPrompt: data.systemPrompt || '',
+    temperature: data.temperature ?? 0.7,
+    numCtx: data.numCtx ?? 24576,
+    think: data.think ?? false,
+    createdAt: Date.now(),
+    updatedAt: Date.now()
+  };
+
+  presets.push(preset);
+  state.set('presets', [...presets]);
+  await saveUserPresets();
+  return preset;
+}
+
+export async function updatePreset(presetId: string, updates: Partial): Promise {
+  const idx = presets.findIndex(p => p.id === presetId);
+  if (idx === -1) return;
+  if (presets[idx].builtIn) return;
+
+  presets[idx] = { ...presets[idx], ...updates, updatedAt: Date.now() };
+  state.set('presets', [...presets]);
+
+  if (activePresetId === presetId) {
+    applyPresetToState(presets[idx], true);
+  }
+
+  await saveUserPresets();
+}
+
+export async function deletePreset(presetId: string): Promise {
+  const idx = presets.findIndex(p => p.id === presetId);
+  if (idx === -1) return;
+  if (presets[idx].builtIn) return;
+
+  presets.splice(idx, 1);
+  state.set('presets', [...presets]);
+
+  if (activePresetId === presetId) {
+    await activatePreset('_default');
+  }
+
+  await saveUserPresets();
+}
+
+async function saveUserPresets(): Promise {
+  const db = state.get(KEYS.DB);
+  if (!db) return;
+
+  const userPresets = presets
+    .filter(p => !p.builtIn)
+    .map(({ builtIn, ...rest }) => rest);
+
+  await db.saveSetting(PRESETS_KEY, userPresets);
+}
diff --git a/src/renderer/services/rag.ts b/src/renderer/services/rag.ts
new file mode 100644
index 0000000..de9c3c0
--- /dev/null
+++ b/src/renderer/services/rag.ts
@@ -0,0 +1,145 @@
+/**
+ * RAG - 检索增强生成管线
+ */
+
+import { state, KEYS } from '../state/state.js';
+import { VectorStore } from './vector-store.js';
+import { chunkText, createChunkMetadata } from './document-processor.js';
+import type { OllamaAPI, SearchResult, VectorItem } from '../types.js';
+
+let vectorStore: VectorStore | null = null;
+
+export async function initVectorStore(): Promise {
+  if (vectorStore) return vectorStore;
+  vectorStore = new VectorStore();
+  await vectorStore.init();
+  return vectorStore;
+}
+
+export function getVectorStore(): VectorStore | null {
+  return vectorStore;
+}
+
+export async function embedText(text: string, model: string): Promise {
+  const api = state.get(KEYS.API);
+  if (!api) throw new Error('Ollama API 未连接');
+
+  const result = await api.embed(model, text);
+  if (result.embedding) return result.embedding;
+  if (result.embeddings && result.embeddings[0]) return result.embeddings[0];
+  throw new Error('嵌入向量返回格式异常');
+}
+
+export async function embedBatch(texts: string[], model: string, onProgress?: (done: number, total: number) => void): Promise {
+  const results: number[][] = [];
+  const batchSize = 5;
+  for (let i = 0; i < texts.length; i += batchSize) {
+    const batch = texts.slice(i, i + batchSize);
+    const embeddings = await Promise.all(batch.map(t => embedText(t, model)));
+    results.push(...embeddings);
+    if (onProgress) onProgress(Math.min(i + batchSize, texts.length), texts.length);
+  }
+  return results;
+}
+
+export async function addDocumentToKB(
+  colId: string, filename: string, content: string, embedModel: string,
+  onProgress?: (done: number, total: number, msg: string) => void
+): Promise<{ docId: string; chunkCount: number }> {
+  const vs = await initVectorStore();
+
+  const textChunks = chunkText(content);
+  if (textChunks.length === 0) throw new Error('文档内容为空，无法处理');
+
+  const docId = `doc_${Date.now()}_${Math.random().toString(36).slice(2, 7)}`;
+
+  if (onProgress) onProgress(0, textChunks.length, '正在生成向量...');
+  const embeddings = await embedBatch(textChunks, embedModel, (done, total) => {
+    if (onProgress) onProgress(done, total, '正在生成向量...');
+  });
+
+  const vectors: VectorItem[] = textChunks.map((chunk, i) => {
+    const meta = createChunkMetadata(chunk, i, docId, filename);
+    return {
+      ...meta,
+      collectionId: colId,
+      embedding: embeddings[i]
+    };
+  });
+
+  if (onProgress) onProgress(textChunks.length, textChunks.length, '正在保存...');
+  await vs.addVectors(vectors);
+
+  const col = await vs.getCollection(colId);
+  if (col) {
+    col.docCount = (col.docCount || 0) + 1;
+    col.chunkCount = (col.chunkCount || 0) + textChunks.length;
+    col.embeddingModel = embedModel;
+    await vs.updateCollection(col);
+  }
+
+  return { docId, chunkCount: textChunks.length };
+}
+
+export async function removeDocumentFromKB(colId: string, docId: string): Promise {
+  const vs = await initVectorStore();
+  const allVectors = await vs.getVectorsByCollection(colId);
+  const docVectors = allVectors.filter(v => v.docId === docId);
+
+  await vs.deleteVectorsByDocument(colId, docId);
+
+  const col = await vs.getCollection(colId);
+  if (col) {
+    col.chunkCount = Math.max(0, (col.chunkCount || 0) - docVectors.length);
+    col.docCount = Math.max(0, (col.docCount || 0) - 1);
+    await vs.updateCollection(col);
+  }
+}
+
+export async function getDocumentsInCollection(colId: string): Promise> {
+  const vs = await initVectorStore();
+  const vectors = await vs.getVectorsByCollection(colId);
+  const docMap = new Map();
+  for (const v of vectors) {
+    if (!docMap.has(v.docId)) {
+      docMap.set(v.docId, { docId: v.docId, filename: v.filename, chunkCount: 0 });
+    }
+    docMap.get(v.docId)!.chunkCount++;
+  }
+  return Array.from(docMap.values());
+}
+
+export async function retrieveContext(query: string, colId: string, topK = 5): Promise<{ context: string; results: SearchResult[] }> {
+  const vs = await initVectorStore();
+  const col = await vs.getCollection(colId);
+  if (!col) throw new Error('知识库集合不存在');
+
+  const embedModel = col.embeddingModel;
+  if (!embedModel) throw new Error('未配置嵌入模型');
+
+  const queryEmbedding = await embedText(query, embedModel);
+  const results = await vs.search(colId, queryEmbedding, topK);
+  if (results.length === 0) return { context: '', results: [] };
+
+  const contextParts = results.map((r, i) =>
+    `[来源 ${i + 1}: ${r.filename}]\n${r.text}`
+  );
+  const context = contextParts.join('\n\n---\n\n');
+
+  return { context, results };
+}
+
+export function buildRagSystemPrompt(context: string, originalSystemPrompt = ''): string {
+  const ragPrompt = `你是一个知识库问答助手。以下是检索到的相关文档片段，请基于这些内容回答用户的问题。如果检索到的内容无法回答问题，请如实说明。
+
+=== 检索到的相关内容 ===
+${context}
+=== 内容结束 ===
+
+请基于以上内容回答用户的问题。引用时请注明来源编号（如"来源 1"）。`;
+
+  if (originalSystemPrompt) {
+    return originalSystemPrompt + '\n\n' + ragPrompt;
+  }
+  return ragPrompt;
+}
diff --git a/src/renderer/services/vector-store.ts b/src/renderer/services/vector-store.ts
new file mode 100644
index 0000000..c482773
--- /dev/null
+++ b/src/renderer/services/vector-store.ts
@@ -0,0 +1,368 @@
+/**
+ * VectorStore - 向量存储与相似度检索
+ */
+
+import type { VectorCollection, VectorItem, SearchResult } from '../types.js';
+
+const MIN_IVF_SIZE = 200;
+const DEFAULT_K = 20;
+const DEFAULT_NPROBE = 5;
+const KMEANS_ITERS = 10;
+
+interface IVFIndex {
+  centroids: number[][];
+  invertedLists: Map;
+  collectionId?: string;
+  version?: string;
+}
+
+export class VectorStore {
+  private dbName: string;
+  private db: IDBDatabase | null = null;
+  private _indexCache = new Map();
+  private _vectorCache = new Map>();
+
+  constructor(dbName = 'metona-ollama-vectors') {
+    this.dbName = dbName;
+  }
+
+  async init(): Promise {
+    return new Promise((resolve, reject) => {
+      const req = indexedDB.open(this.dbName, 2);
+      req.onerror = () => reject(req.error);
+      req.onsuccess = () => { this.db = req.result; resolve(); };
+      req.onupgradeneeded = (e) => {
+        const db = (e.target as IDBOpenDBRequest).result;
+        if (!db.objectStoreNames.contains('vectors')) {
+          const store = db.createObjectStore('vectors', { keyPath: 'id' });
+          store.createIndex('collectionId', 'collectionId', { unique: false });
+        }
+        if (!db.objectStoreNames.contains('collections')) {
+          db.createObjectStore('collections', { keyPath: 'id' });
+        }
+        if (!db.objectStoreNames.contains('indexes')) {
+          db.createObjectStore('indexes', { keyPath: 'collectionId' });
+        }
+      };
+    });
+  }
+
+  private _tx(store: string, mode: IDBTransactionMode = 'readonly'): IDBObjectStore {
+    return this.db!.transaction(store, mode).objectStore(store);
+  }
+
+  async createCollection(name: string, embeddingModel = ''): Promise {
+    const col: VectorCollection = {
+      id: `kb_${Date.now()}_${Math.random().toString(36).slice(2, 7)}`,
+      name, embeddingModel,
+      docCount: 0, chunkCount: 0,
+      createdAt: Date.now(), updatedAt: Date.now()
+    };
+    return new Promise((resolve, reject) => {
+      const req = this._tx('collections', 'readwrite').put(col);
+      req.onsuccess = () => resolve(col);
+      req.onerror = () => reject(req.error);
+    });
+  }
+
+  async getCollections(): Promise {
+    return new Promise((resolve, reject) => {
+      const req = this._tx('collections').getAll();
+      req.onsuccess = () => resolve(req.result || []);
+      req.onerror = () => reject(req.error);
+    });
+  }
+
+  async getCollection(id: string): Promise {
+    return new Promise((resolve, reject) => {
+      const req = this._tx('collections').get(id);
+      req.onsuccess = () => resolve(req.result || null);
+      req.onerror = () => reject(req.error);
+    });
+  }
+
+  async updateCollection(col: VectorCollection): Promise {
+    col.updatedAt = Date.now();
+    return new Promise((resolve, reject) => {
+      const req = this._tx('collections', 'readwrite').put(col);
+      req.onsuccess = () => resolve();
+      req.onerror = () => reject(req.error);
+    });
+  }
+
+  async deleteCollection(colId: string): Promise {
+    const vectors = await this.getVectorsByCollection(colId);
+    await new Promise((resolve, reject) => {
+      const tx = this.db!.transaction(['vectors', 'collections', 'indexes'], 'readwrite');
+      const vStore = tx.objectStore('vectors');
+      for (const v of vectors) vStore.delete(v.id);
+      tx.objectStore('collections').delete(colId);
+      tx.objectStore('indexes').delete(colId);
+      tx.oncomplete = () => resolve();
+      tx.onerror = () => reject(tx.error);
+    });
+    this._indexCache.delete(colId);
+    this._vectorCache.delete(colId);
+  }
+
+  async addVectors(items: VectorItem[]): Promise {
+    if (items.length === 0) return;
+    await new Promise((resolve, reject) => {
+      const tx = this.db!.transaction('vectors', 'readwrite');
+      const store = tx.objectStore('vectors');
+      for (const item of items) store.put(item);
+      tx.oncomplete = () => resolve();
+      tx.onerror = () => reject(tx.error);
+    });
+    const colId = items[0].collectionId;
+    if (!this._vectorCache.has(colId)) {
+      this._vectorCache.set(colId, new Map());
+    }
+    const cache = this._vectorCache.get(colId)!;
+    for (const item of items) cache.set(item.id, item);
+    this._indexCache.delete(colId);
+  }
+
+  async getVectorsByCollection(colId: string): Promise {
+    if (this._vectorCache.has(colId)) {
+      return Array.from(this._vectorCache.get(colId)!.values());
+    }
+    const vectors = await new Promise((resolve, reject) => {
+      const idx = this._tx('vectors').index('collectionId');
+      const req = idx.getAll(colId);
+      req.onsuccess = () => resolve(req.result || []);
+      req.onerror = () => reject(req.error);
+    });
+    const cache = new Map();
+    for (const v of vectors) cache.set(v.id, v);
+    this._vectorCache.set(colId, cache);
+    return vectors;
+  }
+
+  async deleteVectorsByDocument(colId: string, docId: string): Promise {
+    const vectors = await this.getVectorsByCollection(colId);
+    const docVectors = vectors.filter(v => v.docId === docId);
+    await new Promise((resolve, reject) => {
+      const tx = this.db!.transaction('vectors', 'readwrite');
+      const store = tx.objectStore('vectors');
+      for (const v of docVectors) store.delete(v.id);
+      tx.oncomplete = () => resolve();
+      tx.onerror = () => reject(tx.error);
+    });
+    if (this._vectorCache.has(colId)) {
+      const cache = this._vectorCache.get(colId)!;
+      for (const v of docVectors) cache.delete(v.id);
+    }
+    this._indexCache.delete(colId);
+  }
+
+  async search(colId: string, queryEmbedding: number[], topK = 5): Promise {
+    const vectors = await this.getVectorsByCollection(colId);
+    if (vectors.length === 0) return [];
+
+    if (vectors.length < MIN_IVF_SIZE) {
+      return this._bruteForceSearch(vectors, queryEmbedding, topK);
+    }
+
+    const index = await this._getIndex(colId, vectors);
+    if (!index) {
+      return this._bruteForceSearch(vectors, queryEmbedding, topK);
+    }
+    return this._ivfSearch(vectors, index, queryEmbedding, topK);
+  }
+
+  private _bruteForceSearch(vectors: VectorItem[], queryEmbedding: number[], topK: number): SearchResult[] {
+    return vectors
+      .map(v => ({ ...v, score: VectorStore.cosineSimilarity(queryEmbedding, v.embedding) }))
+      .sort((a, b) => b.score - a.score)
+      .slice(0, topK);
+  }
+
+  private _ivfSearch(vectors: VectorItem[], index: IVFIndex, queryEmbedding: number[], topK: number): SearchResult[] {
+    const { centroids, invertedLists } = index;
+    const clusterScores = centroids.map((c, i) => ({
+      id: i,
+      score: VectorStore.cosineSimilarity(queryEmbedding, c)
+    }));
+    clusterScores.sort((a, b) => b.score - a.score);
+
+    const nprobe = Math.min(DEFAULT_NPROBE, centroids.length);
+    const targetClusters = clusterScores.slice(0, nprobe);
+
+    const candidateIds = new Set();
+    for (const { id: clusterId } of targetClusters) {
+      const list = invertedLists.get(clusterId);
+      if (list) for (const id of list) candidateIds.add(id);
+    }
+
+    const vectorMap = new Map();
+    for (const v of vectors) vectorMap.set(v.id, v);
+
+    const candidates: VectorItem[] = [];
+    for (const id of candidateIds) {
+      const v = vectorMap.get(id);
+      if (v) candidates.push(v);
+    }
+
+    return candidates
+      .map(v => ({ ...v, score: VectorStore.cosineSimilarity(queryEmbedding, v.embedding) }))
+      .sort((a, b) => b.score - a.score)
+      .slice(0, topK);
+  }
+
+  private async _getIndex(colId: string, vectors: VectorItem[]): Promise {
+    if (this._indexCache.has(colId)) {
+      const cached = this._indexCache.get(colId)!;
+      if (cached.version === this._indexVersion(vectors)) return cached;
+    }
+
+    const saved = await new Promise } | null>((resolve, reject) => {
+      const req = this._tx('indexes').get(colId);
+      req.onsuccess = () => resolve(req.result || null);
+      req.onerror = () => reject(req.error);
+    });
+
+    if (saved && saved.version === this._indexVersion(vectors)) {
+      if (!(saved.invertedLists instanceof Map)) {
+        saved.invertedLists = new Map(Object.entries(saved.invertedListsObj || {}));
+      }
+      this._indexCache.set(colId, saved);
+      return saved;
+    }
+
+    console.log(`[VectorStore] 构建 IVF 索引: ${colId} (${vectors.length} 向量)`);
+    const index = this._buildIVFIndex(vectors);
+    index.collectionId = colId;
+    index.version = this._indexVersion(vectors);
+
+    const toSave = {
+      collectionId: index.collectionId,
+      version: index.version,
+      centroids: index.centroids,
+      invertedListsObj: Object.fromEntries(index.invertedLists)
+    };
+    await new Promise((resolve, reject) => {
+      const req = this._tx('indexes', 'readwrite').put(toSave);
+      req.onsuccess = () => resolve();
+      req.onerror = () => reject(req.error);
+    });
+
+    this._indexCache.set(colId, index);
+    return index;
+  }
+
+  private _indexVersion(vectors: VectorItem[]): string {
+    if (vectors.length === 0) return '0';
+    return `${vectors.length}_${vectors[0]?.id || ''}_${vectors[vectors.length - 1]?.id || ''}`;
+  }
+
+  private _buildIVFIndex(vectors: VectorItem[]): IVFIndex {
+    const N = vectors.length;
+    const dim = vectors[0].embedding.length;
+    const K = Math.max(2, Math.min(DEFAULT_K, Math.floor(N / 10)));
+
+    const centroids = this._kmeansPPInit(vectors, K, dim);
+    const assignments = new Array(N);
+
+    for (let iter = 0; iter < KMEANS_ITERS; iter++) {
+      for (let i = 0; i < N; i++) {
+        let bestCluster = 0;
+        let bestScore = -Infinity;
+        for (let k = 0; k < K; k++) {
+          const score = VectorStore.cosineSimilarity(vectors[i].embedding, centroids[k]);
+          if (score > bestScore) { bestScore = score; bestCluster = k; }
+        }
+        assignments[i] = bestCluster;
+      }
+
+      const newCentroids = Array.from({ length: K }, () => new Array(dim).fill(0));
+      const counts = new Array(K).fill(0);
+
+      for (let i = 0; i < N; i++) {
+        const k = assignments[i];
+        counts[k]++;
+        const emb = vectors[i].embedding;
+        for (let d = 0; d < dim; d++) newCentroids[k][d] += emb[d];
+      }
+
+      for (let k = 0; k < K; k++) {
+        if (counts[k] > 0) {
+          for (let d = 0; d < dim; d++) newCentroids[k][d] /= counts[k];
+          this._normalize(newCentroids[k]);
+        } else {
+          newCentroids[k] = [...vectors[Math.floor(Math.random() * N)].embedding];
+        }
+      }
+
+      let converged = true;
+      for (let k = 0; k < K; k++) {
+        if (VectorStore.cosineSimilarity(centroids[k], newCentroids[k]) < 0.999) {
+          converged = false;
+          break;
+        }
+      }
+
+      for (let k = 0; k < K; k++) centroids[k] = newCentroids[k];
+      if (converged) break;
+    }
+
+    const invertedLists = new Map();
+    for (let i = 0; i < N; i++) {
+      const k = assignments[i];
+      if (!invertedLists.has(k)) invertedLists.set(k, []);
+      invertedLists.get(k)!.push(vectors[i].id);
+    }
+
+    return { centroids, invertedLists };
+  }
+
+  private _kmeansPPInit(vectors: VectorItem[], K: number, dim: number): number[][] {
+    const centroids: number[][] = [];
+    const first = Math.floor(Math.random() * vectors.length);
+    centroids.push([...vectors[first].embedding]);
+
+    for (let k = 1; k < K; k++) {
+      const dists = vectors.map(v => {
+        let minDist = Infinity;
+        for (const c of centroids) {
+          const sim = VectorStore.cosineSimilarity(v.embedding, c);
+          const dist = 1 - sim;
+          if (dist < minDist) minDist = dist;
+        }
+        return minDist;
+      });
+
+      const total = dists.reduce((s, d) => s + d, 0);
+      if (total === 0) {
+        centroids.push([...vectors[Math.floor(Math.random() * vectors.length)].embedding]);
+        continue;
+      }
+
+      let r = Math.random() * total;
+      for (let i = 0; i < vectors.length; i++) {
+        r -= dists[i];
+        if (r <= 0) { centroids.push([...vectors[i].embedding]); break; }
+      }
+    }
+    return centroids;
+  }
+
+  private _normalize(vec: number[]): void {
+    let norm = 0;
+    for (let i = 0; i < vec.length; i++) norm += vec[i] * vec[i];
+    norm = Math.sqrt(norm);
+    if (norm > 0) for (let i = 0; i < vec.length; i++) vec[i] /= norm;
+  }
+
+  static cosineSimilarity(a: number[], b: number[]): number {
+    if (!a || !b || a.length !== b.length) return 0;
+    let dot = 0, normA = 0, normB = 0;
+    for (let i = 0; i < a.length; i++) {
+      dot += a[i] * b[i];
+      normA += a[i] * a[i];
+      normB += b[i] * b[i];
+    }
+    const denom = Math.sqrt(normA) * Math.sqrt(normB);
+    return denom === 0 ? 0 : dot / denom;
+  }
+}
diff --git a/src/renderer/state/state.ts b/src/renderer/state/state.ts
new file mode 100644
index 0000000..65df6d5
--- /dev/null
+++ b/src/renderer/state/state.ts
@@ -0,0 +1,151 @@
+/**
+ * State - 轻量级响应式状态管理
+ */
+
+import type { StateKey, ChatSession, ChatDB, OllamaAPI, Preset } from '../types.js';
+
+function shallowEqual(a: unknown, b: unknown): boolean {
+  if (a === b) return true;
+  if (a == null || b == null) return a === b;
+  if (typeof a !== 'object' || typeof b !== 'object') return false;
+  if (Array.isArray(a) && Array.isArray(b)) {
+    if (a.length !== b.length) return false;
+    for (let i = 0; i < a.length; i++) {
+      if (a[i] !== b[i]) return false;
+    }
+    return true;
+  }
+  if (Array.isArray(a) !== Array.isArray(b)) return false;
+  const keysA = Object.keys(a as object);
+  const keysB = Object.keys(b as object);
+  if (keysA.length !== keysB.length) return false;
+  for (const key of keysA) {
+    if (!Object.prototype.hasOwnProperty.call(b, key) || (a as Record)[key] !== (b as Record)[key]) return false;
+  }
+  return true;
+}
+
+type Listener = (value: unknown, old: unknown) => void;
+
+class AppState {
+  private _state: Record = {};
+  private _listeners = new Map>();
+  private _batching = false;
+  private _batchQueue: Set | null = null;
+
+  set(key: string, value: unknown): void {
+    const old = this._state[key];
+    this._state[key] = value;
+    if (!shallowEqual(old, value)) {
+      if (this._batching) {
+        this._batchQueue!.add(key);
+      } else {
+        this._notify(key, value, old);
+      }
+    }
+  }
+
+  update(key: string, updater: (old: unknown) => unknown): void {
+    const old = this._state[key];
+    const value = updater(old);
+    this._state[key] = value;
+    if (!shallowEqual(old, value)) {
+      if (this._batching) {
+        this._batchQueue!.add(key);
+      } else {
+        this._notify(key, value, old);
+      }
+    }
+  }
+
+  setIn(key: string, path: (string | number)[], value: unknown): void {
+    if (!path || path.length === 0) {
+      this.set(key, value);
+      return;
+    }
+    const old = this._state[key];
+    if (old == null || typeof old !== 'object') {
+      console.warn(`[State] setIn 失败: ${key} 不是对象`);
+      return;
+    }
+    const newRoot = Array.isArray(old) ? [...(old as unknown[])] : { ...(old as Record) };
+    let current: Record = newRoot as Record;
+    for (let i = 0; i < path.length - 1; i++) {
+      const segment = path[i];
+      const next = current[segment as string];
+      if (next == null || typeof next !== 'object') {
+        const isIndex = typeof path[i + 1] === 'number';
+        current[segment as string] = isIndex ? [] : {};
+      } else {
+        current[segment as string] = Array.isArray(next) ? [...next] : { ...(next as Record) };
+      }
+      current = current[segment as string] as Record;
+    }
+    current[path[path.length - 1] as string] = value;
+    this._state[key] = newRoot;
+    if (!shallowEqual(old, newRoot)) {
+      if (this._batching) {
+        this._batchQueue!.add(key);
+      } else {
+        this._notify(key, newRoot, old);
+      }
+    }
+  }
+
+  batch(fn: () => void): void {
+    this._batching = true;
+    this._batchQueue = new Set();
+    try {
+      fn();
+    } finally {
+      const keys = this._batchQueue;
+      this._batching = false;
+      this._batchQueue = null;
+      for (const k of keys) {
+        this._notify(k, this._state[k], undefined);
+      }
+    }
+  }
+
+  private _notify(key: string, value: unknown, old: unknown): void {
+    if (!this._listeners.has(key)) return;
+    for (const cb of this._listeners.get(key)!) {
+      try { cb(value, old); } catch (e) {
+        console.error(`[State] 监听器错误 (${key}):`, e);
+      }
+    }
+  }
+
+  get(key: string, defaultValue?: T): T {
+    return (key in this._state ? this._state[key] : defaultValue) as T;
+  }
+
+  on(key: string, callback: Listener): () => void {
+    if (!this._listeners.has(key)) {
+      this._listeners.set(key, new Set());
+    }
+    this._listeners.get(key)!.add(callback);
+    return () => this._listeners.get(key)?.delete(callback);
+  }
+
+  init(initial: Record): void {
+    Object.assign(this._state, initial);
+  }
+}
+
+export const state = new AppState();
+
+export const KEYS = {
+  DB: 'db',
+  API: 'api',
+  CURRENT_SESSION: 'currentSession',
+  IS_STREAMING: 'isStreaming',
+  IS_HISTORY_VIEW: 'isHistoryView',
+  PENDING_IMAGES: 'pendingImages',
+  ABORT_CONTROLLER: 'abortController',
+  SYSTEM_PROMPT: 'systemPrompt',
+  SYSTEM_PROMPT_ENABLED: 'systemPromptEnabled',
+  NUM_CTX: 'numCtx',
+  HISTORY_PAGE: 'historyPage',
+  HISTORY_SEARCH: 'historySearchQuery',
+} as const;
diff --git a/src/renderer/styles/style.css b/src/renderer/styles/style.css
new file mode 100644
index 0000000..9198df5
--- /dev/null
+++ b/src/renderer/styles/style.css
@@ -0,0 +1,2183 @@
+/* ═══════════════════════════════════════════════════════════════
+   Metona Ollama — Windows 11 Fluent Design 暗色主题
+   Mica 材质 · Segoe UI Variable · WinUI 3 控件风格
+   ═══════════════════════════════════════════════════════════════ */
+
+/* ── CSS 变量 ── */
+:root {
+    /* Windows 11 暗色调色板 */
+    --bg-solid: #202020;
+    --bg-card: #2d2d2d;
+    --bg-card-hover: #323232;
+    --bg-layer: #383838;
+    --bg-layer-alt: #2a2a2a;
+    --bg-smoke: rgba(0, 0, 0, 0.3);
+    --bg-mica: rgba(32, 32, 32, 0.72);
+    --bg-acrylic: rgba(32, 32, 32, 0.8);
+
+    --border-subtle: rgba(255, 255, 255, 0.06);
+    --border-default: rgba(255, 255, 255, 0.08);
+    --border-strong: rgba(255, 255, 255, 0.12);
+    --border-focus: #60CDFF;
+
+    --text-primary: #FFFFFF;
+    --text-secondary: #999999;
+    --text-tertiary: #666666;
+    --text-disabled: #505050;
+
+    --accent: #60CDFF;
+    --accent-hover: #7AD8FF;
+    --accent-subtle: rgba(96, 205, 255, 0.06);
+    --accent-subtle-hover: rgba(96, 205, 255, 0.1);
+
+    --critical: #F1707B;
+    --critical-bg: rgba(241, 112, 123, 0.06);
+    --success: #6CCB5F;
+    --success-bg: rgba(108, 203, 95, 0.06);
+    --caution: #FCE100;
+    --caution-bg: rgba(252, 225, 0, 0.06);
+
+    /* 圆角 — Windows 11 标准 */
+    --radius-control: 4px;
+    --radius-sm: 8px;
+    --radius-md: 8px;
+    --radius-lg: 12px;
+    --radius-xl: 16px;
+
+    /* 阴影 — Fluent Design 深度 */
+    --shadow-flyout: 0 8px 16px rgba(0, 0, 0, 0.14);
+    --shadow-dialog: 0 24px 48px rgba(0, 0, 0, 0.18);
+    --shadow-tooltip: 0 4px 8px rgba(0, 0, 0, 0.14);
+
+    /* 字体 */
+    --font: 'Segoe UI Variable', 'Segoe UI', system-ui, -apple-system, sans-serif;
+    --font-mono: 'Cascadia Mono', 'Cascadia Code', 'Consolas', monospace;
+
+    --transition: 167ms cubic-bezier(0, 0, 0, 1);
+    --transition-fast: 83ms cubic-bezier(0, 0, 0, 1);
+}
+
+/* ── 全局重置 ── */
+*, *::before, *::after {
+    margin: 0;
+    padding: 0;
+    box-sizing: border-box;
+}
+
+html, body {
+    height: 100%;
+    overflow: hidden;
+    background: var(--bg-solid);
+    color: var(--text-primary);
+    font-family: var(--font);
+    font-size: 14px;
+    line-height: 1.5;
+    -webkit-font-smoothing: antialiased;
+    -moz-osx-font-smoothing: grayscale;
+}
+
+#app {
+    display: flex;
+    flex-direction: column;
+    height: 100vh;
+}
+
+/* ═══ 顶部导航 ═══ */
+.app-header {
+    display: flex;
+    align-items: center;
+    justify-content: space-between;
+    padding: 8px 16px;
+    background: var(--bg-mica);
+    backdrop-filter: saturate(180%) blur(20px);
+    -webkit-backdrop-filter: saturate(180%) blur(20px);
+    border-bottom: 1px solid var(--border-subtle);
+    flex-shrink: 0;
+    z-index: 10;
+}
+
+.header-left {
+    display: flex;
+    align-items: center;
+    gap: 10px;
+    min-width: 0;
+    flex: 1;
+}
+
+.logo {
+    font-size: 20px;
+    flex-shrink: 0;
+}
+
+.app-title {
+    font-size: 14px;
+    font-weight: 600;
+    color: var(--text-primary);
+    white-space: nowrap;
+}
+
+.app-version {
+    font-size: 10px;
+    font-weight: 600;
+    color: var(--text-secondary);
+    background: var(--bg-layer);
+    border: 1px solid var(--border-default);
+    border-radius: 12px;
+    padding: 1px 8px;
+    white-space: nowrap;
+    user-select: none;
+}
+
+.header-right {
+    display: flex;
+    align-items: center;
+    gap: 4px;
+}
+
+/* ── 连接状态 ── */
+.conn-status {
+    display: flex;
+    align-items: center;
+    gap: 6px;
+    padding: 4px 10px;
+    border-radius: var(--radius-control);
+    font-size: 12px;
+    color: var(--text-secondary);
+}
+
+.status-dot {
+    width: 8px;
+    height: 8px;
+    border-radius: 50%;
+    transition: var(--transition);
+}
+
+.status-label {
+    white-space: nowrap;
+}
+
+.conn-status.connected .status-dot {
+    background: var(--success);
+    box-shadow: 0 0 4px var(--success);
+}
+
+.conn-status.disconnected .status-dot {
+    background: var(--critical);
+}
+
+.conn-status.pending .status-dot {
+    background: var(--caution);
+    animation: blink 1s ease-in-out infinite;
+}
+
+@keyframes blink {
+    0%, 100% { opacity: 1; }
+    50% { opacity: 0.4; }
+}
+
+/* ── 图标按钮 (WinUI 3 风格) ── */
+.icon-btn {
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    width: 36px;
+    height: 36px;
+    border: none;
+    background: transparent;
+    color: var(--text-secondary);
+    border-radius: var(--radius-control);
+    cursor: pointer;
+    transition: var(--transition);
+    position: relative;
+}
+
+.icon-btn::before {
+    content: '';
+    position: absolute;
+    inset: 0;
+    border-radius: var(--radius-control);
+    background: currentColor;
+    opacity: 0;
+    transition: var(--transition);
+}
+
+.icon-btn:hover::before {
+    opacity: 0.06;
+}
+
+.icon-btn:active::before {
+    opacity: 0.04;
+}
+
+.icon-btn:hover {
+    color: var(--text-primary);
+}
+
+.icon-btn:active {
+    transform: scale(0.97);
+}
+
+.icon-btn svg {
+    width: 18px;
+    height: 18px;
+    position: relative;
+    z-index: 1;
+}
+
+.icon-btn.disabled,
+.icon-btn:disabled {
+    opacity: 0.36;
+    cursor: not-allowed;
+}
+
+/* 图片按钮禁用时保留 pointer-events 以显示 tooltip 和 cursor */
+#btnAttachImg.disabled {
+    pointer-events: auto;
+}
+
+#btnAttachImg.disabled:hover {
+    opacity: 0.3;
+    background: rgba(241, 112, 123, 0.08);
+}
+
+.icon-btn.sm {
+    width: 28px;
+    height: 28px;
+}
+
+.icon-btn.sm svg {
+    width: 14px;
+    height: 14px;
+}
+
+.icon-btn.danger:hover {
+    color: var(--critical);
+}
+
+.help-btn {
+    margin-left: 2px;
+    opacity: 0.5;
+}
+
+.help-btn:hover {
+    opacity: 1;
+}
+
+/* ═══ 模型选择栏 ═══ */
+.model-bar {
+    display: flex;
+    align-items: center;
+    gap: 10px;
+    padding: 8px 16px;
+    background: var(--bg-layer-alt);
+    border-bottom: 1px solid var(--border-subtle);
+    flex-shrink: 0;
+}
+
+.model-bar-icon {
+    width: 28px;
+    height: 28px;
+    border-radius: var(--radius-control);
+    background: var(--accent-subtle);
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    flex-shrink: 0;
+}
+
+.model-bar-icon svg {
+    width: 14px;
+    height: 14px;
+    color: var(--accent);
+}
+
+.model-select-wrap {
+    position: relative;
+    flex: 1;
+    min-width: 0;
+    display: flex;
+    align-items: center;
+}
+
+.model-select {
+    width: 100%;
+    padding: 6px 32px 6px 12px;
+    background: var(--bg-layer);
+    border: 1px solid var(--border-default);
+    border-radius: var(--radius-control);
+    color: var(--text-primary);
+    font-size: 13px;
+    font-family: var(--font);
+    outline: none;
+    cursor: pointer;
+    transition: var(--transition);
+    appearance: none;
+    -webkit-appearance: none;
+}
+
+.model-select:focus {
+    border-color: var(--border-focus);
+    box-shadow: 0 0 0 1px var(--border-focus);
+}
+
+.model-select:hover {
+    border-color: var(--border-strong);
+}
+
+.model-select option {
+    background: var(--bg-card);
+    color: var(--text-primary);
+}
+
+.model-select-arrow {
+    position: absolute;
+    right: 8px;
+    top: 50%;
+    transform: translateY(-50%);
+    pointer-events: none;
+    color: var(--text-tertiary);
+}
+
+.model-select-arrow svg {
+    width: 14px;
+    height: 14px;
+}
+
+.model-badges {
+    display: flex;
+    gap: 6px;
+    flex-shrink: 0;
+}
+
+.model-badge {
+    font-size: 11px;
+    font-weight: 500;
+    white-space: nowrap;
+    padding: 3px 8px;
+    border-radius: var(--radius-control);
+    border: 1px solid;
+}
+
+.think-badge {
+    color: var(--accent);
+    background: var(--accent-subtle);
+    border-color: rgba(96, 205, 255, 0.15);
+}
+
+.vision-badge {
+    color: var(--success);
+    background: var(--success-bg);
+    border-color: rgba(108, 203, 95, 0.15);
+}
+
+.rag-badge {
+    color: #B388FF;
+    background: rgba(179, 136, 255, 0.06);
+    border-color: rgba(179, 136, 255, 0.15);
+}
+
+/* ── 预设栏 ── */
+.preset-bar {
+    display: flex;
+    align-items: center;
+    gap: 8px;
+    padding: 6px 16px;
+    background: var(--bg-layer-alt);
+    border-bottom: 1px solid var(--border-subtle);
+    flex-shrink: 0;
+}
+
+.preset-list {
+    display: flex;
+    gap: 6px;
+    flex: 1;
+    overflow-x: auto;
+    overflow-y: hidden;
+    scrollbar-width: none;
+    -ms-overflow-style: none;
+    padding: 2px 0;
+}
+
+.preset-list::-webkit-scrollbar { display: none; }
+
+.preset-chip {
+    display: flex;
+    align-items: center;
+    gap: 5px;
+    padding: 4px 12px;
+    border-radius: var(--radius-control);
+    border: 1px solid var(--border-default);
+    background: var(--bg-layer);
+    color: var(--text-secondary);
+    font-size: 12px;
+    font-family: var(--font);
+    white-space: nowrap;
+    cursor: pointer;
+    transition: var(--transition);
+    flex-shrink: 0;
+    user-select: none;
+}
+
+.preset-chip:hover {
+    background: var(--bg-card-hover);
+    border-color: var(--border-strong);
+    color: var(--text-primary);
+}
+
+.preset-chip.active {
+    background: var(--accent-subtle);
+    border-color: var(--accent);
+    color: var(--accent);
+    font-weight: 600;
+}
+
+.preset-chip.active:hover {
+    background: var(--accent-subtle-hover);
+}
+
+.preset-chip-icon {
+    font-size: 13px;
+    line-height: 1;
+}
+
+.preset-chip-name {
+    line-height: 1;
+}
+
+.preset-add-btn {
+    width: 28px;
+    height: 28px;
+    border-radius: var(--radius-control);
+    border: 1px dashed var(--border-default);
+    background: transparent;
+    color: var(--text-tertiary);
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    cursor: pointer;
+    transition: var(--transition);
+    flex-shrink: 0;
+}
+
+.preset-add-btn:hover {
+    border-color: var(--accent);
+    color: var(--accent);
+    background: var(--accent-subtle);
+}
+
+.preset-add-btn svg {
+    width: 14px;
+    height: 14px;
+}
+
+/* ── 预设模态框 ── */
+.preset-name-row {
+    display: flex;
+    gap: 8px;
+    align-items: center;
+}
+
+.preset-icon-input {
+    width: 52px !important;
+    text-align: center;
+    font-size: 16px;
+    flex-shrink: 0;
+    padding: 6px 4px !important;
+}
+
+.preset-temp-slider {
+    width: 100%;
+    -webkit-appearance: none;
+    appearance: none;
+    height: 4px;
+    border-radius: 2px;
+    background: var(--bg-layer);
+    outline: none;
+    margin: 8px 0;
+}
+
+.preset-temp-slider::-webkit-slider-thumb {
+    -webkit-appearance: none;
+    width: 16px;
+    height: 16px;
+    border-radius: 50%;
+    background: var(--accent);
+    cursor: pointer;
+    box-shadow: 0 0 0 4px transparent;
+    transition: box-shadow var(--transition);
+}
+
+.preset-temp-slider::-webkit-slider-thumb:hover {
+    box-shadow: 0 0 0 3px var(--accent-subtle);
+}
+
+.preset-temp-slider::-moz-range-thumb {
+    width: 16px;
+    height: 16px;
+    border-radius: 50%;
+    background: var(--accent);
+    cursor: pointer;
+    border: none;
+}
+
+.preset-modal-actions {
+    display: flex;
+    gap: 8px;
+    align-items: center;
+    margin-top: 16px;
+    padding-top: 12px;
+    border-top: 1px solid var(--border-subtle);
+}
+
+/* ── Think 按钮 ── */
+.think-toggle {
+    display: flex;
+    align-items: center;
+    cursor: pointer;
+    flex-shrink: 0;
+    user-select: none;
+}
+
+.think-toggle input { display: none; }
+
+.think-btn {
+    width: 36px;
+    height: 36px;
+    border-radius: var(--radius-control);
+    background: var(--bg-layer);
+    border: 1px solid var(--border-default);
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    transition: var(--transition);
+    color: var(--text-tertiary);
+}
+
+.think-btn svg {
+    width: 18px;
+    height: 18px;
+}
+
+.think-toggle:not(.unavailable):hover .think-btn {
+    border-color: var(--border-strong);
+    color: var(--text-secondary);
+}
+
+.think-toggle input:checked + .think-btn {
+    background: var(--accent-subtle);
+    border-color: var(--accent);
+    color: var(--accent);
+    box-shadow: 0 0 12px rgba(96, 205, 255, 0.4), 0 0 4px rgba(96, 205, 255, 0.2);
+}
+
+.think-toggle input:checked + .think-btn:hover {
+    background: var(--accent-subtle-hover);
+    box-shadow: 0 0 18px rgba(96, 205, 255, 0.55), 0 0 6px rgba(96, 205, 255, 0.3);
+}
+
+.think-toggle.unavailable .think-btn {
+    opacity: 0.36;
+    cursor: not-allowed;
+}
+
+.think-toggle.unavailable:hover .think-btn {
+    opacity: 0.3;
+    background: rgba(241, 112, 123, 0.08);
+}
+
+/* ── 开关控件 (WinUI ToggleSwitch) ── */
+.toggle-label {
+    display: flex;
+    align-items: center;
+    gap: 8px;
+    font-size: 12px;
+    color: var(--text-secondary);
+    cursor: pointer;
+    user-select: none;
+    white-space: nowrap;
+}
+
+.toggle-label input { display: none; }
+
+.toggle-slider {
+    position: relative;
+    width: 40px;
+    height: 20px;
+    background: var(--bg-layer);
+    border: 1px solid var(--border-default);
+    border-radius: 10px;
+    transition: var(--transition);
+}
+
+.toggle-slider::after {
+    content: '';
+    position: absolute;
+    top: 2px;
+    left: 2px;
+    width: 14px;
+    height: 14px;
+    background: var(--text-secondary);
+    border-radius: 50%;
+    transition: var(--transition);
+}
+
+.toggle-label input:checked + .toggle-slider {
+    background: var(--accent);
+    border-color: var(--accent);
+}
+
+.toggle-label input:checked + .toggle-slider::after {
+    transform: translateX(20px);
+    background: var(--bg-solid);
+}
+
+/* ═══ 聊天区域 ═══ */
+.chat-area {
+    flex: 1;
+    overflow-y: auto;
+    overflow-x: hidden;
+    padding: 16px;
+    scroll-behavior: smooth;
+}
+
+.chat-area::-webkit-scrollbar {
+    width: 8px;
+}
+
+.chat-area::-webkit-scrollbar-track {
+    background: transparent;
+}
+
+.chat-area::-webkit-scrollbar-thumb {
+    background: var(--border-default);
+    border-radius: 4px;
+}
+
+.chat-area::-webkit-scrollbar-thumb:hover {
+    background: var(--border-strong);
+}
+
+/* ── 回到底部按钮 ── */
+.scroll-to-bottom {
+    position: sticky;
+    bottom: 16px;
+    float: right;
+    margin-right: 4px;
+    display: flex;
+    align-items: center;
+    gap: 6px;
+    padding: 6px 14px;
+    border: 1px solid var(--border-default);
+    background: var(--bg-card);
+    backdrop-filter: blur(20px);
+    border-radius: var(--radius-control);
+    color: var(--text-secondary);
+    font-size: 12px;
+    font-family: var(--font);
+    cursor: pointer;
+    z-index: 5;
+    box-shadow: var(--shadow-flyout);
+    transition: var(--transition);
+    animation: fadeSlideUp 167ms ease;
+}
+
+.scroll-to-bottom:hover {
+    background: var(--bg-card-hover);
+    border-color: var(--border-strong);
+    color: var(--text-primary);
+}
+
+.scroll-to-bottom:active {
+    transform: scale(0.98);
+}
+
+.scroll-to-bottom svg {
+    width: 14px;
+    height: 14px;
+}
+
+@keyframes fadeSlideUp {
+    from { opacity: 0; transform: translateY(8px); }
+    to { opacity: 1; transform: translateY(0); }
+}
+
+/* ── 空状态 ── */
+.empty-state {
+    display: flex;
+    flex-direction: column;
+    align-items: center;
+    justify-content: center;
+    height: 100%;
+    gap: 12px;
+    color: var(--text-tertiary);
+}
+
+.empty-icon svg {
+    width: 80px;
+    height: 80px;
+    opacity: 0.3;
+    color: var(--text-tertiary);
+}
+
+.empty-state h2 {
+    font-size: 20px;
+    font-weight: 600;
+    color: var(--text-primary);
+}
+
+.empty-state p {
+    font-size: 14px;
+    color: var(--text-tertiary);
+}
+
+/* ── 消息气泡 ── */
+.messages {
+    display: flex;
+    flex-direction: column;
+    gap: 12px;
+    max-width: 780px;
+    margin: 0 auto;
+}
+
+.message {
+    display: flex;
+    gap: 12px;
+    animation: fadeSlideUp 167ms ease;
+}
+
+.msg-avatar {
+    flex-shrink: 0;
+    width: 32px;
+    height: 32px;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    font-size: 16px;
+    border-radius: var(--radius-control);
+    background: var(--bg-layer);
+    border: 1px solid var(--border-subtle);
+}
+
+.msg-body {
+    flex: 1;
+    min-width: 0;
+}
+
+.msg-role {
+    font-size: 12px;
+    font-weight: 600;
+    color: var(--text-tertiary);
+    margin-bottom: 4px;
+    display: flex;
+    align-items: center;
+    gap: 8px;
+}
+
+.model-tag {
+    display: inline-block;
+    font-size: 11px;
+    font-weight: 600;
+    color: var(--accent);
+    background: var(--accent-subtle);
+    border: 1px solid rgba(96, 205, 255, 0.15);
+    border-radius: var(--radius-control);
+    padding: 1px 8px;
+    line-height: 1.5;
+    white-space: nowrap;
+}
+
+.message.user .msg-body {
+    background: var(--bg-layer);
+    border: 1px solid var(--border-subtle);
+    border-radius: var(--radius-md);
+    padding: 10px 14px;
+}
+
+.message.assistant .msg-body {
+    background: var(--bg-card);
+    border: 1px solid var(--border-subtle);
+    border-radius: var(--radius-md);
+    padding: 10px 14px;
+}
+
+.msg-content {
+    font-size: 14px;
+    line-height: 1.65;
+    word-break: break-word;
+}
+
+.msg-content pre {
+    background: var(--bg-solid);
+    border: 1px solid var(--border-default);
+    border-radius: var(--radius-control);
+    padding: 12px 14px;
+    overflow-x: auto;
+    font-family: var(--font-mono);
+    font-size: 13px;
+    margin: 8px 0;
+}
+
+.msg-content code {
+    background: rgba(255, 255, 255, 0.06);
+    padding: 1px 5px;
+    border-radius: 3px;
+    font-family: var(--font-mono);
+    font-size: 0.9em;
+}
+
+.msg-content pre code {
+    background: none;
+    padding: 0;
+}
+
+.msg-content p { margin-bottom: 8px; }
+.msg-content p:last-child { margin-bottom: 0; }
+
+/* 思考块 */
+.think-block {
+    margin-bottom: 8px;
+    border: 1px solid rgba(252, 225, 0, 0.12);
+    border-radius: var(--radius-control);
+    overflow: hidden;
+}
+
+.think-header {
+    display: flex;
+    align-items: center;
+    gap: 6px;
+    padding: 6px 10px;
+    background: var(--caution-bg);
+    color: var(--caution);
+    font-size: 12px;
+    cursor: pointer;
+    user-select: none;
+}
+
+.think-header .chevron {
+    margin-left: auto;
+    transition: transform var(--transition);
+}
+
+.think-header .chevron.expanded {
+    transform: rotate(180deg);
+}
+
+.think-content {
+    padding: 8px 12px;
+    background: rgba(252, 225, 0, 0.02);
+}
+
+.think-content pre {
+    font-size: 12px;
+    color: var(--text-secondary);
+    white-space: pre-wrap;
+    word-break: break-word;
+    margin: 0;
+    background: none;
+    border: none;
+    padding: 0;
+}
+
+/* 打字光标 */
+.typing-cursor {
+    display: inline-block;
+    width: 2px;
+    height: 1em;
+    background: var(--accent);
+    animation: caretBlink 1s step-end infinite;
+    vertical-align: text-bottom;
+    margin-left: 1px;
+}
+
+@keyframes caretBlink {
+    0%, 100% { opacity: 1; }
+    50% { opacity: 0; }
+}
+
+/* ═══ Loading 动画 ═══ */
+.loading-dots {
+    display: inline-flex;
+    align-items: center;
+    gap: 5px;
+    padding: 8px 0;
+}
+
+.loading-dots span {
+    width: 6px;
+    height: 6px;
+    border-radius: 50%;
+    background: var(--text-tertiary);
+    animation: dotPulse 1.4s ease-in-out infinite;
+}
+
+.loading-dots span:nth-child(1) { animation-delay: 0s; }
+.loading-dots span:nth-child(2) { animation-delay: 0.2s; }
+.loading-dots span:nth-child(3) { animation-delay: 0.4s; }
+
+@keyframes dotPulse {
+    0%, 80%, 100% { transform: scale(0.6); opacity: 0.3; }
+    40% { transform: scale(1); opacity: 1; }
+}
+
+.loading-text {
+    font-size: 12px;
+    color: var(--text-tertiary);
+    animation: loadingFade 1.5s ease-in-out infinite;
+}
+
+@keyframes loadingFade {
+    0%, 100% { opacity: 0.4; }
+    50% { opacity: 0.8; }
+}
+
+/* 消息图片 */
+.msg-images {
+    display: flex;
+    flex-wrap: wrap;
+    gap: 8px;
+    margin-top: 8px;
+}
+
+.msg-img {
+    max-width: 200px;
+    max-height: 200px;
+    border-radius: var(--radius-control);
+    border: 1px solid var(--border-subtle);
+    object-fit: cover;
+}
+
+.msg-img[data-lightbox] {
+    cursor: zoom-in;
+    transition: var(--transition);
+}
+
+.msg-img[data-lightbox]:hover {
+    opacity: 0.85;
+}
+
+/* 文件 chip */
+.msg-files {
+    display: flex;
+    flex-wrap: wrap;
+    gap: 6px;
+    margin-top: 8px;
+}
+
+.msg-files .file-chip {
+    background: var(--accent-subtle);
+    border-color: rgba(96, 205, 255, 0.12);
+}
+
+/* 统计信息 */
+.msg-stats {
+    display: flex;
+    gap: 12px;
+    margin-top: 6px;
+    font-size: 11px;
+    color: var(--text-tertiary);
+}
+
+/* RAG 知识库来源 */
+.rag-sources {
+    margin-top: 8px;
+    padding: 8px 12px;
+    background: var(--accent-subtle);
+    border: 1px solid rgba(96, 205, 255, 0.1);
+    border-radius: var(--radius-control);
+    font-size: 12px;
+}
+
+.rag-sources-header {
+    color: var(--accent);
+    font-weight: 600;
+    margin-bottom: 4px;
+    font-size: 11px;
+}
+
+.rag-source-item {
+    display: flex;
+    justify-content: space-between;
+    align-items: center;
+    padding: 3px 0;
+    color: var(--text-tertiary);
+}
+
+.rag-source-item + .rag-source-item {
+    border-top: 1px solid var(--border-subtle);
+}
+
+.rag-source-name {
+    color: var(--text-secondary);
+    overflow: hidden;
+    text-overflow: ellipsis;
+    white-space: nowrap;
+}
+
+.rag-source-score {
+    color: var(--success);
+    font-weight: 500;
+    margin-left: 8px;
+    flex-shrink: 0;
+}
+
+/* ═══ 输入区域 ═══ */
+.input-area {
+    flex-shrink: 0;
+    padding: 10px 16px 14px;
+    background: var(--bg-mica);
+    backdrop-filter: saturate(180%) blur(20px);
+    -webkit-backdrop-filter: saturate(180%) blur(20px);
+    border-top: 1px solid var(--border-subtle);
+}
+
+.image-preview {
+    display: flex;
+    gap: 8px;
+    padding: 8px 0;
+    flex-wrap: wrap;
+}
+
+.preview-thumb {
+    position: relative;
+    width: 56px;
+    height: 56px;
+    border-radius: var(--radius-control);
+    overflow: hidden;
+    border: 1px solid var(--border-default);
+}
+
+.preview-thumb img {
+    width: 100%;
+    height: 100%;
+    object-fit: cover;
+}
+
+.remove-img {
+    position: absolute;
+    top: 2px;
+    right: 2px;
+    width: 18px;
+    height: 18px;
+    border: none;
+    background: var(--critical);
+    color: white;
+    border-radius: 50%;
+    font-size: 12px;
+    line-height: 1;
+    cursor: pointer;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+}
+
+/* 文件预览 */
+.file-preview {
+    display: flex;
+    flex-wrap: wrap;
+    gap: 6px;
+    padding: 8px 0;
+}
+
+.file-chip {
+    display: flex;
+    align-items: center;
+    gap: 6px;
+    padding: 4px 10px;
+    border-radius: var(--radius-control);
+    background: var(--accent-subtle);
+    border: 1px solid rgba(96, 205, 255, 0.12);
+    font-size: 12px;
+    line-height: 1;
+    transition: var(--transition);
+    animation: fadeSlideUp 167ms ease;
+}
+
+.file-chip:hover {
+    background: var(--accent-subtle-hover);
+    border-color: rgba(96, 205, 255, 0.2);
+}
+
+.file-icon {
+    font-size: 13px;
+    flex-shrink: 0;
+}
+
+.file-name {
+    font-weight: 600;
+    color: var(--text-primary);
+    max-width: 160px;
+    overflow: hidden;
+    text-overflow: ellipsis;
+    white-space: nowrap;
+}
+
+.file-size {
+    color: var(--text-tertiary);
+    flex-shrink: 0;
+}
+
+.remove-file {
+    background: none;
+    border: none;
+    color: var(--text-tertiary);
+    cursor: pointer;
+    font-size: 14px;
+    line-height: 1;
+    padding: 0 2px;
+    border-radius: 3px;
+    transition: var(--transition);
+}
+
+.remove-file:hover {
+    color: var(--critical);
+    background: var(--critical-bg);
+}
+
+.input-row {
+    display: flex;
+    align-items: flex-end;
+    gap: 8px;
+}
+
+.attach-btn {
+    flex-shrink: 0;
+}
+
+.chat-input {
+    flex: 1;
+    padding: 8px 12px;
+    background: var(--bg-layer);
+    border: 1px solid var(--border-default);
+    border-radius: var(--radius-control);
+    color: var(--text-primary);
+    font-family: var(--font);
+    font-size: 14px;
+    resize: none;
+    outline: none;
+    min-height: 36px;
+    max-height: 120px;
+    line-height: 1.5;
+    transition: var(--transition);
+}
+
+.chat-input:focus {
+    border-color: var(--border-focus);
+    box-shadow: 0 0 0 1px var(--border-focus);
+}
+
+.chat-input::placeholder {
+    color: var(--text-disabled);
+}
+
+.send-btn {
+    flex-shrink: 0;
+    width: 36px;
+    height: 36px;
+    border: none;
+    border-radius: var(--radius-control);
+    background: var(--accent);
+    color: #1a1a1a;
+    cursor: pointer;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    transition: var(--transition);
+}
+
+.send-btn:hover {
+    background: var(--accent-hover);
+}
+
+.send-btn:active {
+    transform: scale(0.96);
+}
+
+.send-btn.disabled {
+    opacity: 0.36;
+    cursor: not-allowed;
+    pointer-events: none;
+}
+
+.send-btn svg {
+    width: 16px;
+    height: 16px;
+}
+
+.send-btn.stop-btn {
+    background: var(--critical);
+    color: white;
+}
+
+.send-btn.stop-btn:hover {
+    opacity: 0.9;
+}
+
+.spinner {
+    width: 16px;
+    height: 16px;
+    border: 2px solid rgba(255, 255, 255, 0.3);
+    border-top-color: white;
+    border-radius: 50%;
+    animation: spin 0.8s linear infinite;
+}
+
+@keyframes spin {
+    to { transform: rotate(360deg); }
+}
+
+/* ═══ 历史只读提示栏 ═══ */
+.history-view-bar {
+    display: flex;
+    align-items: center;
+    gap: 10px;
+    padding: 6px 16px;
+    background: rgba(96, 205, 255, 0.04);
+    border-top: 1px solid rgba(96, 205, 255, 0.1);
+    font-size: 13px;
+    color: var(--accent);
+    flex-shrink: 0;
+}
+
+/* ═══ 模态框 (WinUI ContentDialog 风格) ═══ */
+.modal-overlay {
+    position: fixed;
+    inset: 0;
+    background: rgba(0, 0, 0, 0.5);
+    backdrop-filter: blur(16px);
+    -webkit-backdrop-filter: blur(16px);
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    z-index: 100;
+    animation: overlayIn 167ms ease;
+    padding: 20px;
+}
+
+@keyframes overlayIn {
+    from { opacity: 0; }
+    to { opacity: 1; }
+}
+
+.modal {
+    background: var(--bg-card);
+    border: 1px solid var(--border-default);
+    border-radius: var(--radius-lg);
+    box-shadow: var(--shadow-dialog);
+    width: 100%;
+    max-width: 480px;
+    max-height: 80vh;
+    display: flex;
+    flex-direction: column;
+    animation: dialogIn 200ms cubic-bezier(0, 0, 0, 1);
+    overflow: hidden;
+}
+
+@keyframes dialogIn {
+    from { opacity: 0; transform: scale(0.96) translateY(8px); }
+    to { opacity: 1; transform: scale(1) translateY(0); }
+}
+
+.modal-lg {
+    max-width: 860px;
+    width: 96vw;
+    max-height: 85vh;
+}
+
+.modal-header {
+    display: flex;
+    align-items: center;
+    justify-content: space-between;
+    padding: 16px 20px;
+    border-bottom: 1px solid var(--border-subtle);
+    flex-shrink: 0;
+}
+
+.modal-header h3 {
+    font-size: 16px;
+    font-weight: 600;
+    color: var(--text-primary);
+}
+
+.modal-body {
+    padding: 16px 20px;
+    overflow-y: auto;
+    flex: 1;
+}
+
+/* ── 设置项 ── */
+.setting-group {
+    margin-bottom: 16px;
+    padding-bottom: 16px;
+    border-bottom: 1px solid var(--border-subtle);
+}
+
+.setting-group:last-child {
+    border-bottom: none;
+    margin-bottom: 0;
+}
+
+.setting-label {
+    display: flex;
+    align-items: center;
+    font-size: 13px;
+    font-weight: 600;
+    color: var(--text-secondary);
+    margin-bottom: 6px;
+}
+
+.setting-input {
+    width: 100%;
+    padding: 8px 10px;
+    background: var(--bg-layer);
+    border: 1px solid var(--border-default);
+    border-radius: var(--radius-control);
+    color: var(--text-primary);
+    font-size: 13px;
+    font-family: var(--font);
+    outline: none;
+    margin-bottom: 6px;
+    transition: var(--transition);
+}
+
+.setting-input:focus {
+    border-color: var(--border-focus);
+    box-shadow: 0 0 0 1px var(--border-focus);
+}
+
+.setting-input::placeholder {
+    color: var(--text-disabled);
+}
+
+/* ── 按钮 (WinUI Button 风格) ── */
+.btn {
+    display: inline-flex;
+    align-items: center;
+    justify-content: center;
+    padding: 6px 16px;
+    border: 1px solid transparent;
+    border-radius: var(--radius-control);
+    font-size: 13px;
+    font-weight: 400;
+    font-family: var(--font);
+    cursor: pointer;
+    transition: var(--transition);
+    gap: 6px;
+    position: relative;
+    outline: none;
+}
+
+.btn::before {
+    content: '';
+    position: absolute;
+    inset: 0;
+    border-radius: inherit;
+    background: currentColor;
+    opacity: 0;
+    transition: var(--transition);
+}
+
+.btn:hover::before { opacity: 0.06; }
+.btn:active::before { opacity: 0.04; }
+
+.btn:active {
+    transform: scale(0.98);
+}
+
+.btn-primary {
+    background: var(--accent);
+    color: #1a1a1a;
+    border-color: transparent;
+}
+
+.btn-primary:hover {
+    background: var(--accent-hover);
+}
+
+.btn-primary::before { display: none; }
+
+.btn-outline {
+    background: var(--bg-layer);
+    border: 1px solid var(--border-default);
+    color: var(--text-secondary);
+}
+
+.btn-outline:hover {
+    border-color: var(--border-strong);
+    color: var(--text-primary);
+}
+
+.btn-danger {
+    background: var(--critical-bg);
+    border: 1px solid rgba(241, 112, 123, 0.15);
+    color: var(--critical);
+}
+
+.btn-danger:hover {
+    background: rgba(241, 112, 123, 0.1);
+}
+
+.btn-sm {
+    padding: 4px 10px;
+    font-size: 12px;
+}
+
+/* ── 连接信息 ── */
+.connection-info {
+    display: flex;
+    align-items: center;
+    gap: 10px;
+    margin-bottom: 8px;
+}
+
+.status-badge {
+    padding: 3px 10px;
+    border-radius: var(--radius-control);
+    font-size: 12px;
+    font-weight: 500;
+}
+
+.status-badge.success {
+    background: var(--success-bg);
+    color: var(--success);
+    border: 1px solid rgba(108, 203, 95, 0.15);
+}
+
+.status-badge.error {
+    background: var(--critical-bg);
+    color: var(--critical);
+    border: 1px solid rgba(241, 112, 123, 0.15);
+}
+
+.status-badge.warning {
+    background: var(--caution-bg);
+    color: var(--caution);
+    border: 1px solid rgba(252, 225, 0, 0.15);
+}
+
+.server-version {
+    font-size: 12px;
+    color: var(--text-tertiary);
+    font-family: var(--font-mono);
+}
+
+.cors-hint {
+    padding: 10px;
+    background: var(--caution-bg);
+    border: 1px solid rgba(252, 225, 0, 0.1);
+    border-radius: var(--radius-control);
+    margin-top: 8px;
+}
+
+.cors-hint p {
+    font-size: 12px;
+    color: var(--caution);
+    margin-bottom: 6px;
+}
+
+.cors-hint code {
+    display: block;
+    padding: 8px;
+    background: var(--bg-solid);
+    border-radius: 3px;
+    font-family: var(--font-mono);
+    font-size: 12px;
+    color: var(--accent);
+    user-select: all;
+}
+
+/* ── 运行中的模型 ── */
+.running-models {
+    display: flex;
+    flex-direction: column;
+    gap: 6px;
+    margin-bottom: 10px;
+}
+
+.running-model {
+    display: flex;
+    align-items: center;
+    gap: 10px;
+    padding: 8px 10px;
+    background: var(--bg-layer);
+    border-radius: var(--radius-control);
+    border: 1px solid var(--border-subtle);
+}
+
+.running-model .model-name {
+    flex: 1;
+    font-size: 13px;
+    font-weight: 500;
+}
+
+.running-model .model-vram {
+    font-size: 12px;
+    color: var(--text-tertiary);
+    font-family: var(--font-mono);
+}
+
+.text-muted {
+    color: var(--text-tertiary);
+    font-size: 13px;
+}
+
+/* ── 历史记录模态框加宽 ── */
+#historyModal .modal {
+    max-width: 680px;
+    max-height: 88vh;
+}
+
+/* ── 历史记录 ── */
+.history-list {
+    display: flex;
+    flex-direction: column;
+    gap: 2px;
+}
+
+.history-search-wrap {
+    position: relative;
+    margin-bottom: 10px;
+}
+
+.history-search-input {
+    width: 100%;
+    padding: 8px 32px 8px 12px;
+    background: var(--bg-layer);
+    border: 1px solid var(--border-default);
+    border-radius: var(--radius-control);
+    color: var(--text-primary);
+    font-size: 13px;
+    font-family: var(--font);
+    outline: none;
+    transition: var(--transition);
+}
+
+.history-search-input::placeholder {
+    color: var(--text-disabled);
+}
+
+.history-search-input:focus {
+    border-color: var(--border-focus);
+    box-shadow: 0 0 0 1px var(--border-focus);
+}
+
+.history-search-clear {
+    position: absolute;
+    right: 6px;
+    top: 50%;
+    transform: translateY(-50%);
+    background: none;
+    border: none;
+    color: var(--text-tertiary);
+    cursor: pointer;
+    font-size: 14px;
+    padding: 4px;
+    line-height: 1;
+}
+
+.history-search-clear:hover {
+    color: var(--text-primary);
+}
+
+.history-item {
+    display: flex;
+    align-items: center;
+    gap: 10px;
+    padding: 10px 10px;
+    border-radius: var(--radius-control);
+    transition: var(--transition);
+}
+
+.history-item:hover {
+    background: var(--bg-layer);
+}
+
+.history-info {
+    flex: 1;
+    min-width: 0;
+    cursor: pointer;
+}
+
+.history-title {
+    font-size: 13px;
+    font-weight: 500;
+    white-space: nowrap;
+    overflow: hidden;
+    text-overflow: ellipsis;
+}
+
+.history-meta {
+    display: flex;
+    gap: 10px;
+    font-size: 11px;
+    color: var(--text-tertiary);
+    margin-top: 2px;
+}
+
+.history-actions {
+    display: flex;
+    gap: 2px;
+    flex-shrink: 0;
+}
+
+/* ── 历史分页 ── */
+.history-pagination {
+    display: flex;
+    align-items: center;
+    justify-content: space-between;
+    padding: 10px 0 4px;
+    border-top: 1px solid var(--border-subtle);
+    margin-top: 8px;
+}
+
+.page-info {
+    font-size: 12px;
+    color: var(--text-tertiary);
+}
+
+.page-buttons {
+    display: flex;
+    align-items: center;
+    gap: 4px;
+}
+
+.page-btn {
+    min-width: 30px;
+    height: 30px;
+    border: 1px solid var(--border-default);
+    background: var(--bg-layer);
+    color: var(--text-secondary);
+    border-radius: var(--radius-control);
+    font-size: 12px;
+    cursor: pointer;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    transition: var(--transition);
+}
+
+.page-btn:hover:not(.disabled):not(.active) {
+    border-color: var(--border-strong);
+    color: var(--text-primary);
+}
+
+.page-btn.active {
+    background: var(--accent-subtle);
+    border-color: var(--accent);
+    color: var(--accent);
+    font-weight: 600;
+}
+
+.page-btn.disabled {
+    opacity: 0.3;
+    cursor: not-allowed;
+}
+
+.page-ellipsis {
+    color: var(--text-disabled);
+    font-size: 12px;
+    padding: 0 2px;
+}
+
+/* ═══ Lightbox ═══ */
+.lightbox-overlay {
+    position: fixed;
+    inset: 0;
+    background: rgba(0, 0, 0, 0.75);
+    backdrop-filter: blur(20px);
+    -webkit-backdrop-filter: blur(20px);
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    z-index: 300;
+    cursor: zoom-out;
+    animation: overlayIn 167ms ease;
+}
+
+.lightbox-img {
+    max-width: 90vw;
+    max-height: 90vh;
+    border-radius: var(--radius-md);
+    box-shadow: var(--shadow-dialog);
+    object-fit: contain;
+    cursor: default;
+}
+
+.lightbox-close {
+    position: fixed;
+    top: 16px;
+    right: 20px;
+    width: 36px;
+    height: 36px;
+    border: 1px solid var(--border-default);
+    background: var(--bg-card);
+    color: var(--text-primary);
+    font-size: 16px;
+    border-radius: var(--radius-control);
+    cursor: pointer;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    transition: var(--transition);
+    z-index: 301;
+}
+
+.lightbox-close:hover {
+    background: var(--bg-card-hover);
+}
+
+/* ═══ 帮助弹框 ═══ */
+#helpModal .modal {
+    max-width: 600px;
+    max-height: 85vh;
+}
+
+.help-section {
+    margin-bottom: 16px;
+    padding: 12px 14px;
+    background: var(--bg-layer);
+    border-radius: var(--radius-control);
+    border-left: 2px solid var(--border-strong);
+    transition: border-color var(--transition);
+}
+
+.help-section:hover {
+    border-left-color: var(--accent);
+}
+
+.help-section:last-child {
+    margin-bottom: 0;
+}
+
+.help-section h4 {
+    font-size: 14px;
+    font-weight: 600;
+    margin-bottom: 8px;
+    color: var(--text-primary);
+}
+
+.help-section ul,
+.help-section ol {
+    padding-left: 18px;
+    font-size: 13px;
+    color: var(--text-secondary);
+    line-height: 1.7;
+}
+
+.help-section li {
+    margin-bottom: 3px;
+}
+
+.help-section code {
+    background: rgba(255, 255, 255, 0.06);
+    color: var(--accent);
+    padding: 1px 6px;
+    border-radius: 3px;
+    font-size: 12px;
+}
+
+.help-section kbd {
+    background: var(--bg-layer);
+    border: 1px solid var(--border-default);
+    border-bottom-width: 2px;
+    border-radius: 3px;
+    padding: 1px 6px;
+    font-size: 12px;
+    font-family: inherit;
+    color: var(--text-primary);
+}
+
+.help-shortcuts {
+    width: 100%;
+    font-size: 13px;
+    border-collapse: collapse;
+    border-radius: var(--radius-control);
+    overflow: hidden;
+    border: 1px solid var(--border-default);
+}
+
+.help-shortcuts td {
+    padding: 6px 10px;
+    border-bottom: 1px solid var(--border-subtle);
+}
+
+.help-shortcuts tr:last-child td {
+    border-bottom: none;
+}
+
+.help-shortcuts td:first-child {
+    width: 140px;
+    text-align: center;
+    background: var(--bg-layer);
+}
+
+.help-shortcuts tr:hover td {
+    background: var(--bg-layer-alt);
+}
+
+/* ═══ 知识库管理 ═══ */
+#kbModal .modal {
+    max-width: 95vw;
+    width: 1100px;
+    max-height: 88vh;
+}
+
+#kbModal .modal-body {
+    padding: 16px 20px;
+    overflow: hidden;
+    display: flex;
+    flex-direction: column;
+}
+
+.kb-layout {
+    display: flex;
+    gap: 16px;
+    flex: 1;
+    min-height: 0;
+    overflow: hidden;
+}
+
+.kb-sidebar {
+    width: 240px;
+    flex-shrink: 0;
+    display: flex;
+    flex-direction: column;
+    gap: 8px;
+    min-height: 0;
+    overflow: hidden;
+    padding-right: 16px;
+    border-right: 1px solid var(--border-subtle);
+}
+
+.kb-new-collection {
+    display: flex;
+    gap: 6px;
+}
+
+.kb-new-collection .setting-input {
+    flex: 1;
+    margin-bottom: 0;
+    font-size: 13px;
+    padding: 6px 10px;
+}
+
+.kb-collection-list {
+    flex: 1;
+    overflow-y: auto;
+    display: flex;
+    flex-direction: column;
+    gap: 2px;
+    min-height: 0;
+}
+
+.kb-collection-item {
+    display: flex;
+    align-items: center;
+    justify-content: space-between;
+    padding: 10px 12px;
+    border-radius: var(--radius-control);
+    cursor: pointer;
+    transition: var(--transition);
+}
+
+.kb-collection-item:hover {
+    background: var(--bg-layer);
+}
+
+.kb-collection-item.active {
+    background: var(--accent-subtle);
+    border: 1px solid rgba(96, 205, 255, 0.12);
+}
+
+.kb-col-info {
+    display: flex;
+    flex-direction: column;
+    gap: 2px;
+    min-width: 0;
+}
+
+.kb-col-name {
+    font-size: 13px;
+    font-weight: 500;
+    white-space: nowrap;
+    overflow: hidden;
+    text-overflow: ellipsis;
+}
+
+.kb-col-stats {
+    font-size: 11px;
+    color: var(--text-tertiary);
+}
+
+.kb-col-delete {
+    opacity: 0;
+    transition: opacity var(--transition);
+}
+
+.kb-collection-item:hover .kb-col-delete {
+    opacity: 1;
+}
+
+.kb-main {
+    flex: 1;
+    display: flex;
+    flex-direction: column;
+    gap: 10px;
+    min-width: 0;
+    min-height: 0;
+    overflow: hidden;
+}
+
+.kb-toolbar {
+    display: flex;
+    align-items: center;
+    gap: 8px;
+    flex-shrink: 0;
+    flex-wrap: wrap;
+    padding: 8px 12px;
+    background: var(--bg-layer);
+    border-radius: var(--radius-control);
+    border: 1px solid var(--border-subtle);
+}
+
+.kb-embed-select {
+    flex: 1;
+    min-width: 0;
+    max-width: 200px;
+    padding: 5px 8px;
+    font-size: 12px;
+    background: var(--bg-layer-alt);
+    color: var(--text-primary);
+    border: 1px solid var(--border-default);
+    border-radius: var(--radius-control);
+    outline: none;
+    cursor: pointer;
+    font-family: var(--font);
+}
+
+.kb-embed-select:focus {
+    border-color: var(--border-focus);
+}
+
+.kb-rag-toggle {
+    display: flex;
+    align-items: center;
+    gap: 6px;
+    margin-left: auto;
+    white-space: nowrap;
+    padding-left: 8px;
+    border-left: 1px solid var(--border-subtle);
+}
+
+.kb-progress {
+    display: inline-flex;
+    align-items: center;
+    gap: 6px;
+    font-size: 12px;
+    color: var(--text-tertiary);
+    padding: 3px 8px;
+    background: var(--accent-subtle);
+    border-radius: var(--radius-control);
+}
+
+.kb-doc-list {
+    flex: 1;
+    overflow-y: auto;
+    display: flex;
+    flex-direction: column;
+    gap: 2px;
+    min-height: 0;
+}
+
+.kb-doc-item {
+    display: flex;
+    align-items: center;
+    gap: 10px;
+    padding: 10px 12px;
+    border-radius: var(--radius-control);
+    transition: var(--transition);
+}
+
+.kb-doc-item:hover {
+    background: var(--bg-layer);
+}
+
+.kb-doc-icon {
+    font-size: 16px;
+    flex-shrink: 0;
+}
+
+.kb-doc-info {
+    flex: 1;
+    display: flex;
+    flex-direction: column;
+    gap: 1px;
+    min-width: 0;
+}
+
+.kb-doc-name {
+    font-size: 13px;
+    white-space: nowrap;
+    overflow: hidden;
+    text-overflow: ellipsis;
+}
+
+.kb-doc-meta {
+    font-size: 11px;
+    color: var(--text-tertiary);
+}
+
+.kb-doc-delete {
+    opacity: 0;
+    transition: opacity var(--transition);
+}
+
+.kb-doc-item:hover .kb-doc-delete {
+    opacity: 1;
+}
+
+/* ── 移动端响应式 ── */
+@media (max-width: 640px) {
+    .kb-layout {
+        flex-direction: column;
+    }
+
+    .kb-sidebar {
+        width: 100%;
+        max-height: 160px;
+        border-right: none;
+        padding-right: 0;
+        padding-bottom: 10px;
+        border-bottom: 1px solid var(--border-subtle);
+    }
+
+    .kb-main {
+        min-height: 180px;
+    }
+
+    .modal-lg {
+        max-height: 92vh;
+    }
+}
+
+/* ═══ Toast 通知 ═══ */
+.toast-container {
+    position: fixed;
+    top: 56px;
+    right: 16px;
+    z-index: 200;
+    display: flex;
+    flex-direction: column;
+    gap: 6px;
+    pointer-events: none;
+}
+
+.toast {
+    display: flex;
+    align-items: center;
+    gap: 8px;
+    padding: 10px 14px;
+    border-radius: var(--radius-control);
+    background: var(--bg-card);
+    border: 1px solid var(--border-default);
+    box-shadow: var(--shadow-flyout);
+    font-size: 13px;
+    color: var(--text-primary);
+    pointer-events: auto;
+    animation: toastIn 167ms ease;
+    max-width: 320px;
+}
+
+.toast.removing {
+    animation: toastOut 167ms ease forwards;
+}
+
+.toast-icon {
+    font-size: 14px;
+    flex-shrink: 0;
+}
+
+.toast.success { border-left: 3px solid var(--success); }
+.toast.error { border-left: 3px solid var(--critical); }
+.toast.warning { border-left: 3px solid var(--caution); }
+.toast.info { border-left: 3px solid var(--accent); }
+
+@keyframes toastIn {
+    from { opacity: 0; transform: translateX(24px); }
+    to { opacity: 1; transform: translateX(0); }
+}
+
+@keyframes toastOut {
+    from { opacity: 1; transform: translateX(0); }
+    to { opacity: 0; transform: translateX(24px); }
+}
+
+/* ═══ 响应式 ═══ */
+@media (min-width: 768px) {
+    .app-header { padding: 8px 24px; }
+    .model-bar { padding: 8px 24px; }
+    .chat-area { padding: 20px 24px; }
+    .messages { max-width: 820px; }
+    .input-area { padding: 10px 24px 16px; }
+    .modal { max-width: 500px; }
+}
+
+@media (min-width: 1024px) {
+    .messages { max-width: 900px; }
+}
+
+/* ── 选中文本 ── */
+::selection {
+    background: rgba(96, 205, 255, 0.3);
+}
+
+/* ── 链接 ── */
+.msg-content a {
+    color: var(--accent);
+    text-decoration: none;
+}
+
+.msg-content a:hover {
+    text-decoration: underline;
+}
+
+.msg-content .blocked-link {
+    color: var(--critical);
+    text-decoration: line-through;
+    cursor: not-allowed;
+    opacity: 0.7;
+}
+
+/* ── 列表 ── */
+.msg-content ul, .msg-content ol {
+    padding-left: 20px;
+    margin: 8px 0;
+}
+
+.msg-content li { margin-bottom: 3px; }
+
+/* ── 表格 ── */
+.msg-content table {
+    width: 100%;
+    border-collapse: collapse;
+    margin: 8px 0;
+    font-size: 13px;
+}
+
+.msg-content th, .msg-content td {
+    padding: 6px 10px;
+    border: 1px solid var(--border-default);
+    text-align: left;
+}
+
+.msg-content th {
+    background: var(--bg-layer);
+    font-weight: 600;
+}
+
+/* ── 引用块 ── */
+.msg-content blockquote {
+    border-left: 2px solid var(--border-strong);
+    padding-left: 12px;
+    margin: 8px 0;
+    color: var(--text-secondary);
+}
diff --git a/src/renderer/types.d.ts b/src/renderer/types.d.ts
new file mode 100644
index 0000000..2ac288b
--- /dev/null
+++ b/src/renderer/types.d.ts
@@ -0,0 +1,250 @@
+// ── Ollama API 类型 ──
+
+export interface OllamaMessage {
+  role: 'user' | 'assistant' | 'system';
+  content: string;
+  images?: string[];
+  thinking?: string;
+  reasoning_content?: string;
+}
+
+export interface OllamaChatParams {
+  model: string;
+  messages: OllamaMessage[];
+  stream?: boolean;
+  think?: boolean;
+  system?: string;
+  keep_alive?: number | string;
+  options?: {
+    num_ctx?: number;
+    temperature?: number;
+    [key: string]: unknown;
+  };
+}
+
+export interface OllamaStreamChunk {
+  model?: string;
+  message?: {
+    role: string;
+    content?: string;
+    thinking?: string;
+    reasoning_content?: string;
+  };
+  done?: boolean;
+  eval_count?: number;
+  total_duration?: number;
+}
+
+export interface OllamaModelInfo {
+  name: string;
+  size?: number;
+  digest?: string;
+  modified_at?: string;
+}
+
+export interface OllamaModelDetail {
+  capabilities?: string[];
+  [key: string]: unknown;
+}
+
+export interface OllamaVersionResponse {
+  version: string;
+}
+
+export interface OllamaModelsResponse {
+  models: OllamaModelInfo[];
+}
+
+export interface OllamaPsResponse {
+  models?: Array<{
+    name: string;
+    size_vram?: number;
+    [key: string]: unknown;
+  }>;
+}
+
+export interface OllamaEmbedResponse {
+  embedding?: number[];
+  embeddings?: number[][];
+}
+
+// ── 会话类型 ──
+
+export interface ChatFile {
+  name: string;
+  language?: string;
+  size?: number;
+}
+
+export interface FileContent {
+  language: string;
+  content: string;
+}
+
+export interface RagSource {
+  filename: string;
+  score: number;
+  text: string;
+}
+
+export interface ChatMessage {
+  role: 'user' | 'assistant';
+  content: string;
+  timestamp: number;
+  model?: string;
+  think?: string;
+  eval_count?: number;
+  total_duration?: number;
+  images?: string[];
+  files?: ChatFile[];
+  _fileContents?: FileContent[];
+  ragSources?: RagSource[];
+  stopped?: boolean;
+}
+
+export interface ChatSession {
+  id: string;
+  title: string;
+  model: string;
+  messages: ChatMessage[];
+  createdAt: number;
+  updatedAt: number;
+}
+
+// ── 预设类型 ──
+
+export interface Preset {
+  id: string;
+  name: string;
+  icon: string;
+  systemPrompt: string;
+  temperature: number;
+  numCtx: number;
+  think: boolean;
+  builtIn?: boolean;
+  createdAt: number;
+  updatedAt: number;
+}
+
+// ── 知识库类型 ──
+
+export interface VectorCollection {
+  id: string;
+  name: string;
+  embeddingModel: string;
+  docCount: number;
+  chunkCount: number;
+  createdAt: number;
+  updatedAt: number;
+}
+
+export interface VectorItem {
+  id: string;
+  collectionId: string;
+  docId: string;
+  filename: string;
+  chunkIndex: number;
+  text: string;
+  charCount: number;
+  embedding: number[];
+}
+
+export interface SearchResult extends VectorItem {
+  score: number;
+}
+
+export interface DocInfo {
+  docId: string;
+  filename: string;
+  chunkCount: number;
+}
+
+// ── 桌面 Bridge 类型 ──
+
+export interface MetonaDesktopAPI {
+  isDesktop: boolean;
+  info: () => Promise;
+  dialog: {
+    openFile: (options?: FileFilterOptions) => Promise;
+    saveFile: (options?: SaveFileOptions) => Promise;
+  };
+  fs: {
+    readFile: (filePath: string) => Promise<{ success: boolean; content?: string; name?: string; error?: string }>;
+    writeFile: (filePath: string, content: string) => Promise<{ success: boolean; error?: string }>;
+  };
+  notify: (title: string, body: string) => void;
+  window: {
+    minimize: () => void;
+    maximize: () => void;
+    close: () => void;
+  };
+  openExternal: (url: string) => void;
+  onMenuAction: (callback: (action: string) => void) => void;
+  onTrayAction: (callback: (action: string) => void) => void;
+  removeAllListeners: (channel: string) => void;
+}
+
+export interface AppInfo {
+  version: string;
+  platform: string;
+  arch: string;
+  electronVersion: string;
+  userDataPath: string;
+}
+
+export interface FileFilterOptions {
+  filters?: Array<{ name: string; extensions: string[] }>;
+}
+
+export interface SaveFileOptions {
+  defaultPath?: string;
+  filters?: Array<{ name: string; extensions: string[] }>;
+}
+
+// ── 桌面 Bridge 接口 ──
+
+export interface DesktopBridge {
+  isDesktop: boolean;
+  getInfo: () => Promise<{ platform: string; version: string; arch?: string; electronVersion?: string; userDataPath?: string }>;
+  openFile: (filters?: Array<{ name: string; extensions: string[] }>) => Promise;
+  saveFile: (options?: SaveFileOptions) => Promise;
+  readFile: (filePath: string) => Promise<{ success: boolean; content?: string; name?: string; error?: string }>;
+  writeFile: (filePath: string, content: string) => Promise<{ success: boolean; error?: string }>;
+  notify: (title: string, body: string) => void;
+  minimize: () => void;
+  maximize: () => void;
+  close: () => void;
+  openExternal: (url: string) => void;
+  onMenuAction: (callback: (action: string) => void) => void;
+  onTrayAction: (callback: (action: string) => void) => void;
+  off: (channel: string) => void;
+}
+
+// ── State Keys ──
+
+export type StateKey =
+  | 'db'
+  | 'api'
+  | 'currentSession'
+  | 'isStreaming'
+  | 'isHistoryView'
+  | 'pendingImages'
+  | 'abortController'
+  | 'systemPrompt'
+  | 'systemPromptEnabled'
+  | 'numCtx'
+  | 'historyPage'
+  | 'historySearchQuery'
+  | 'temperature'
+  | 'thinkEnabled'
+  | 'presets'
+  | 'activePresetId';
+
+// ── Window global 声明 ──
+
+declare global {
+  interface Window {
+    metonaDesktop?: MetonaDesktopAPI;
+    __metonaBridge?: DesktopBridge;
+  }
+}
diff --git a/src/renderer/utils/marked-config.ts b/src/renderer/utils/marked-config.ts
new file mode 100644
index 0000000..f4e488a
--- /dev/null
+++ b/src/renderer/utils/marked-config.ts
@@ -0,0 +1,83 @@
+/**
+ * Markdown 渲染器配置
+ */
+
+import { SAFE_URI_SCHEMES } from './sanitizer.js';
+
+// 简化的 Markdown 解析器（内联，不依赖外部 marked 库）
+// 支持基本 GFM 语法：标题、粗体、斜体、代码块、链接、列表、表格
+
+function parseMarkdown(md: string): string {
+  if (!md) return '';
+  let html = escapeForMd(md);
+
+  // 代码块 ```...```
+  html = html.replace(/```(\w*)\n([\s\S]*?)```/g, (_m, lang, code) => {
+    return `
${code.trim()}
`;
+  });
+
+  // 行内代码
+  html = html.replace(/`([^`]+)`/g, '$1');
+
+  // 标题
+  html = html.replace(/^######\s+(.+)$/gm, '
$1
');
+  html = html.replace(/^#####\s+(.+)$/gm, '
$1
');
+  html = html.replace(/^####\s+(.+)$/gm, '
$1
');
+  html = html.replace(/^###\s+(.+)$/gm, '
$1
');
+  html = html.replace(/^##\s+(.+)$/gm, '
$1
');
+  html = html.replace(/^#\s+(.+)$/gm, '
$1
');
+
+  // 粗体+斜体
+  html = html.replace(/\*\*\*(.+?)\*\*\*/g, '$1');
+  // 粗体
+  html = html.replace(/\*\*(.+?)\*\*/g, '$1');
+  // 斜体
+  html = html.replace(/\*(.+?)\*/g, '$1');
+  // 删除线
+  html = html.replace(/~~(.+?)~~/g, '$1');
+
+  // 链接 [text](url)
+  html = html.replace(/\[([^\]]+)\]\(([^)]+)\)/g, (_m, text, href) => {
+    try {
+      const safe = SAFE_URI_SCHEMES.has(new URL(href, 'https://placeholder').protocol);
+      if (!safe) return `${text}`;
+    } catch { /* allow relative */ }
+    return `${text}`;
+  });
+
+  // 图片 ![alt](url)
+  html = html.replace(/!\[([^\]]*)\]\(([^)]+)\)/g, '$1');
+
+  // 引用块
+  html = html.replace(/^>\s+(.+)$/gm, '
$1
');
+
+  // 水平线
+  html = html.replace(/^---+$/gm, '
');
+
+  // 无序列表
+  html = html.replace(/^[\-\*]\s+(.+)$/gm, '
  • $1
    • ');
+  html = html.replace(/((?:
  • .*<\/li>\n?)+)/g, '
      $1
    ');
+
+  // 有序列表
+  html = html.replace(/^\d+\.\s+(.+)$/gm, '
  • $1
    • ');
+
+  // 换行
+  html = html.replace(/\n\n/g, '
    ');
+  html = html.replace(/\n/g, '
    ');
+
+  // 包裹在 p 标签中
+  if (!html.startsWith('<')) {
+    html = '
    ' + html + '
    ';
+  }
+
+  return html;
+}
+
+function escapeForMd(str: string): string {
+  return str
+    .replace(/&/g, '&')
+    .replace(//g, '>');
+}
+
+export { parseMarkdown as marked };
diff --git a/src/renderer/utils/sanitizer.ts b/src/renderer/utils/sanitizer.ts
new file mode 100644
index 0000000..cf51362
--- /dev/null
+++ b/src/renderer/utils/sanitizer.ts
@@ -0,0 +1,74 @@
+/**
+ * Sanitizer - HTML 净化器
+ */
+
+export const SAFE_URI_SCHEMES = new Set(['http:', 'https:', 'mailto:', 'tel:', 'ftp:', 'ftps:', 'xmpp:']);
+export const SAFE_DATA_TYPES = new Set(['image/png', 'image/jpeg', 'image/gif', 'image/webp', 'image/svg+xml']);
+
+const ALLOWED_TAGS = new Set([
+  'a', 'abbr', 'b', 'blockquote', 'br', 'code', 'del', 'details', 'div',
+  'dl', 'dt', 'dd', 'em', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'hr',
+  'i', 'img', 'ins', 'kbd', 'li', 'ol', 'p', 'pre', 'q', 'rp', 'rt',
+  'ruby', 's', 'samp', 'small', 'span', 'strike', 'strong', 'sub',
+  'summary', 'sup', 'table', 'tbody', 'td', 'tfoot', 'th', 'thead',
+  'tr', 'u', 'ul', 'var', 'input',
+]);
+
+const ALLOWED_ATTRS = new Set([
+  'href', 'src', 'alt', 'title', 'width', 'height', 'align',
+  'target', 'rel', 'class', 'id', 'type', 'checked', 'disabled',
+  'start', 'value', 'scope', 'rowspan', 'colspan', 'lang',
+]);
+
+const DANGEROUS_PREFIXES = ['on', 'xlink:href', 'xmlns:'];
+
+export function sanitize(html: string): string {
+  try {
+    const template = document.createElement('template');
+    template.innerHTML = html;
+    const root = template.content;
+
+    const walker = document.createTreeWalker(root, NodeFilter.SHOW_COMMENT);
+    const comments: Comment[] = [];
+    while (walker.nextNode()) comments.push(walker.currentNode as Comment);
+    comments.forEach(c => c.remove());
+
+    const elements = [...root.querySelectorAll('*')];
+    for (const el of elements) {
+      if (!el.parentNode) continue;
+      const tag = el.tagName.toLowerCase();
+
+      if (!ALLOWED_TAGS.has(tag)) {
+        while (el.firstChild) el.parentNode.insertBefore(el.firstChild, el);
+        el.remove();
+        continue;
+      }
+
+      for (const attr of [...el.attributes]) {
+        const name = attr.name.toLowerCase();
+        if (DANGEROUS_PREFIXES.some(p => name.startsWith(p))) {
+          el.removeAttribute(attr.name);
+          continue;
+        }
+        if (!ALLOWED_ATTRS.has(name)) {
+          el.removeAttribute(attr.name);
+          continue;
+        }
+        if ((name === 'href' || name === 'src' || name === 'action') && attr.value) {
+          const val = attr.value.trim().toLowerCase();
+          if (/^(javascript|vbscript|data|file):/i.test(val)) {
+            const mimeMatch = val.match(/^data:([^;,]+)/i);
+            if (!mimeMatch || !SAFE_DATA_TYPES.has(mimeMatch[1].toLowerCase())) {
+              el.removeAttribute(attr.name);
+            }
+          }
+        }
+      }
+    }
+
+    return root.innerHTML;
+  } catch (e) {
+    console.warn('[Sanitizer] 净化失败:', e);
+    return html;
+  }
+}
diff --git a/src/renderer/utils/utils.ts b/src/renderer/utils/utils.ts
new file mode 100644
index 0000000..82ff153
--- /dev/null
+++ b/src/renderer/utils/utils.ts
@@ -0,0 +1,115 @@
+/**
+ * Utils - 通用工具函数
+ */
+
+/** 生成唯一 ID */
+export function generateId(): string {
+  return `${Date.now()}-${Math.random().toString(36).substr(2, 9)}`;
+}
+
+/** 格式化时间戳 */
+export function formatTime(ts: number): string {
+  const d = new Date(ts);
+  const pad = (n: number): string => String(n).padStart(2, '0');
+  return `${d.getFullYear()}-${pad(d.getMonth() + 1)}-${pad(d.getDate())} ${pad(d.getHours())}:${pad(d.getMinutes())}`;
+}
+
+/** 截断文本 */
+export function truncate(str: string, len = 50): string {
+  if (!str) return '';
+  return str.length > len ? str.substring(0, len) + '...' : str;
+}
+
+/** 防抖 */
+export function debounce unknown>(fn: T, ms = 300): (...args: Parameters) => void {
+  let timer: ReturnType;
+  return (...args: Parameters) => {
+    clearTimeout(timer);
+    timer = setTimeout(() => fn(...args), ms);
+  };
+}
+
+/** 格式化字节大小 */
+export function formatSize(bytes: number): string {
+  if (!bytes) return '';
+  const units = ['B', 'KB', 'MB', 'GB', 'TB'];
+  let i = 0;
+  let size = bytes;
+  while (size >= 1024 && i < units.length - 1) {
+    size /= 1024;
+    i++;
+  }
+  return `${size.toFixed(1)} ${units[i]}`;
+}
+
+/** HTML 转义 */
+export function escapeHtml(str: string): string {
+  const map: Record = { '&': '&', '<': '<', '>': '>', '"': '"', "'": ''' };
+  return String(str).replace(/[&<>"']/g, (c) => map[c]);
+}
+
+/** 下载文件 */
+export function downloadFile(filename: string, content: string, type: string): void {
+  const blob = new Blob([content], { type: type + ';charset=utf-8' });
+  const url = URL.createObjectURL(blob);
+  const a = document.createElement('a');
+  a.href = url;
+  a.download = filename;
+  a.click();
+  URL.revokeObjectURL(url);
+}
+
+/** File → Base64（去前缀） */
+export function fileToBase64(file: File): Promise {
+  return new Promise((resolve, reject) => {
+    const reader = new FileReader();
+    reader.onload = () => {
+      const result = reader.result as string;
+      const base64 = result.split(',')[1];
+      resolve(base64);
+    };
+    reader.onerror = reject;
+    reader.readAsDataURL(file);
+  });
+}
+
+/** File → 文本内容 */
+export function fileToText(file: File): Promise {
+  return new Promise((resolve, reject) => {
+    const reader = new FileReader();
+    reader.onload = () => resolve(reader.result as string);
+    reader.onerror = reject;
+    reader.readAsText(file);
+  });
+}
+
+/** 根据文件名检测语言标识（用于 Markdown 代码块） */
+export function detectLanguage(filename: string): string {
+  const ext = filename.split('.').pop()?.toLowerCase() || '';
+  const map: Record = {
+    py: 'python', pyw: 'python', pyi: 'python',
+    js: 'javascript', mjs: 'javascript', cjs: 'javascript',
+    ts: 'typescript', tsx: 'tsx', jsx: 'jsx',
+    java: 'java', class: 'java',
+    c: 'c', h: 'c',
+    cpp: 'cpp', cc: 'cpp', cxx: 'cpp', hpp: 'cpp',
+    go: 'go', rs: 'rust', rb: 'ruby', php: 'php',
+    sh: 'bash', bash: 'bash', zsh: 'bash', fish: 'bash',
+    sql: 'sql', html: 'html', htm: 'html', css: 'css',
+    json: 'json', jsonl: 'json',
+    xml: 'xml', svg: 'svg',
+    yaml: 'yaml', yml: 'yaml', toml: 'toml',
+    ini: 'ini', cfg: 'ini', conf: 'ini',
+    md: 'markdown', markdown: 'markdown', rst: 'rst',
+    txt: '', csv: 'csv', tsv: 'csv', log: '',
+    swift: 'swift', kt: 'kotlin', kts: 'kotlin',
+    scala: 'scala', lua: 'lua', pl: 'perl', r: 'r',
+    m: 'matlab', mm: 'objectivec',
+    cs: 'csharp', fs: 'fsharp', vb: 'vbnet',
+    ex: 'elixir', exs: 'elixir', erl: 'erlang',
+    hs: 'haskell', clj: 'clojure', lisp: 'lisp',
+    dockerfile: 'dockerfile', makefile: 'makefile',
+    diff: 'diff', patch: 'diff',
+  };
+  return map[ext] ?? ext;
+}
diff --git a/tsconfig.json b/tsconfig.json
new file mode 100644
index 0000000..86464f5
--- /dev/null
+++ b/tsconfig.json
@@ -0,0 +1,30 @@
+{
+  "compilerOptions": {
+    "target": "ES2022",
+    "module": "ESNext",
+    "moduleResolution": "bundler",
+    "strict": true,
+    "esModuleInterop": true,
+    "skipLibCheck": true,
+    "forceConsistentCasingInFileNames": true,
+    "resolveJsonModule": true,
+    "isolatedModules": true,
+    "noUnusedLocals": false,
+    "noUnusedParameters": false,
+    "noImplicitReturns": true,
+    "noFallthroughCasesInSwitch": true,
+    "declaration": true,
+    "declarationMap": true,
+    "sourceMap": true,
+    "outDir": "dist",
+    "rootDir": "src",
+    "baseUrl": ".",
+    "paths": {
+      "@main/*": ["src/main/*"],
+      "@renderer/*": ["src/renderer/*"]
+    },
+    "lib": ["ES2022", "DOM", "DOM.Iterable"]
+  },
+  "include": ["src/**/*.ts", "src/**/*.d.ts"],
+  "exclude": ["node_modules", "dist", "release"]
+}