feat: 文件对话框全部改用 Electron 原生对话框

- input-area.ts: 图片/文件上传改用 dialog.showOpenDialog（通过 IPC）
- settings-modal.ts: 导入改用原生打开对话框，导出改用原生保存对话框
- kb-modal.ts: 知识库文档上传改用原生打开对话框
- ipc.ts/preload.ts/types.d.ts: writeFile 增加 encoding 参数支持二进制写入
- index.html: 移除 4 个无用的 <input type="file"> 元素
- 清理死代码: fileToBase64, fileToText, isMetonaFile

src/main/ipc.ts

@@ -46,9 +46,9 @@ export function setupIPC(): void {
     }
   });
 
-  ipcMain.handle('fs:writeFile', async (_, filePath: string, content: string) => {
+  ipcMain.handle('fs:writeFile', async (_, filePath: string, content: string, encoding?: string) => {
     try {
-      await fs.promises.writeFile(filePath, content, 'utf-8');
+      await fs.promises.writeFile(filePath, content, (encoding as BufferEncoding) || 'utf-8');
       return { success: true };
     } catch (err) {
       return { success: false, error: (err as Error).message };

src/main/preload.ts

@@ -13,7 +13,7 @@ contextBridge.exposeInMainWorld('metonaDesktop', {
   },
   fs: {
     readFile: (filePath: string) => ipcRenderer.invoke('fs:readFile', filePath),
-    writeFile: (filePath: string, content: string) => ipcRenderer.invoke('fs:writeFile', filePath, content)
+    writeFile: (filePath: string, content: string, encoding?: string) => ipcRenderer.invoke('fs:writeFile', filePath, content, encoding)
   },
   tool: {
     execute: (toolName: string, args: Record<string, unknown>) => ipcRenderer.invoke('tool:execute', toolName, args),

src/renderer/components/input-area.ts

@@ -3,7 +3,7 @@
  */
 
 import { state, KEYS } from '../state/state.js';
-import { fileToBase64, fileToText, detectLanguage, truncate, escapeHtml, formatSize } from '../utils/utils.js';
+import { detectLanguage, truncate, escapeHtml, formatSize } from '../utils/utils.js';
 import { getSelectedModel, isThinkEnabled, isVisionAvailable, isToolCallingSupported } from './model-bar.js';
 import {
   renderMessages, appendAssistantPlaceholder, appendSystemMessage,
@@ -21,8 +21,6 @@ import type { ChatSession, ChatMessage, OllamaStreamChunk, RagSource, FileConten
 
 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 }> = [];
@@ -50,18 +48,20 @@ function getFileIcon(filename: string): string {
   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() || '';
+function isTextFile(name: string): boolean {
+  const lower = name.toLowerCase();
+  if (lower === 'dockerfile' || lower === 'makefile') return true;
+  const ext = lower.split('.').pop() || '';
   return TEXT_EXTENSIONS.has(ext);
 }
 
+function getBridge(): any {
+  return (window as any).metonaDesktop;
+}
+
 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')!;
 
@@ -82,22 +82,30 @@ export function initInputArea(): void {
 
   chatInputEl.addEventListener('input', autoResizeTextarea);
 
-  document.querySelector('#btnAttachImg')!.addEventListener('click', () => {
+  // ── 图片上传：原生文件对话框 ──
+  document.querySelector('#btnAttachImg')!.addEventListener('click', async () => {
     if (!isVisionAvailable()) {
       showToast('当前模型不支持图片分析', 'warning');
       return;
     }
-    fileInputEl.click();
+    const bridge = getBridge();
+    if (!bridge) return;
+    const paths = await bridge.dialog.openFile({
+      filters: [{ name: '图片', extensions: ['png', 'jpg', 'jpeg', 'gif', 'webp', 'bmp', 'svg'] }]
     });
-  fileInputEl.addEventListener('change', (e) => {
-    handleImageSelect((e.target as HTMLInputElement).files!);
-    (e.target as HTMLInputElement).value = '';
+    if (!paths || paths.length === 0) return;
+    await handleImagePaths(paths);
   });
 
-  document.querySelector('#btnAttachFile')!.addEventListener('click', () => textFileInputEl.click());
-  textFileInputEl.addEventListener('change', (e) => {
-    handleTextFileSelect((e.target as HTMLInputElement).files!);
-    (e.target as HTMLInputElement).value = '';
+  // ── 文件上传：原生文件对话框 ──
+  document.querySelector('#btnAttachFile')!.addEventListener('click', async () => {
+    const bridge = getBridge();
+    if (!bridge) return;
+    const paths = await bridge.dialog.openFile({
+      filters: [{ name: '文本/代码', extensions: Array.from(TEXT_EXTENSIONS) }]
+    });
+    if (!paths || paths.length === 0) return;
+    await handleTextFilePaths(paths);
   });
 
   imagePreviewEl.addEventListener('click', (e) => {
@@ -122,23 +130,32 @@ function autoResizeTextarea(): void {
   chatInputEl.style.height = Math.min(chatInputEl.scrollHeight, 120) + 'px';
 }
 
-async function handleImageSelect(files: FileList): Promise<void> {
+async function handleImagePaths(paths: string[]): Promise<void> {
+  const bridge = getBridge();
   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`);
+  for (const filePath of paths) {
+    const name = filePath.split(/[/\\]/).pop() || filePath;
+    try {
+      const result = await bridge.fs.readFile(filePath);
+      if (!result.success) {
+        appendSystemMessage(`❌ 读取 ${name} 失败: ${result.error}`);
         continue;
       }
-    try {
-      const base64 = await fileToBase64(file);
-      pendingImages.push({ name: file.name, base64 });
-      logInfo(`图片已添加: ${file.name}`, formatSize(file.size));
-      renderImagePreviews();
+      // IPC 返回的 content 是 UTF-8 字符串，转为 base64
+      const binary = Uint8Array.from(atob(result.content as string), c => c.charCodeAt(0));
+      const base64 = btoa(String.fromCharCode(...binary));
+      if (binary.length > maxSize) {
+        appendSystemMessage(`⚠️ 图片 ${name} 超过 20MB 限制`);
+        continue;
+      }
+      pendingImages.push({ name, base64 });
+      logInfo(`图片已添加: ${name}`, formatSize(binary.length));
     } catch (err) {
       console.error('[InputArea] 图片读取失败:', err);
+      appendSystemMessage(`❌ 读取 ${name} 失败`);
     }
   }
+  renderImagePreviews();
 }
 
 function renderImagePreviews(): void {
@@ -156,28 +173,36 @@ function renderImagePreviews(): void {
   `).join('');
 }
 
-async function handleTextFileSelect(files: FileList): Promise<void> {
-  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`);
+async function handleTextFilePaths(paths: string[]): Promise<void> {
+  const bridge = getBridge();
+  for (const filePath of paths) {
+    const name = filePath.split(/[/\\]/).pop() || filePath;
+    if (!isTextFile(name)) {
+      appendSystemMessage(`⚠️ ${name} 不是支持的文本/代码文件`);
       continue;
     }
     try {
-      const content = await fileToText(file);
-      pendingFiles.push({ name: file.name, content, language: detectLanguage(file.name), size: file.size });
-      logInfo(`文件已添加: ${file.name}`, formatSize(file.size));
+      const result = await bridge.fs.readFile(filePath);
+      if (!result.success) {
+        appendSystemMessage(`❌ 读取 ${name} 失败: ${result.error}`);
+        continue;
+      }
+      const content = result.content as string;
+      const size = new TextEncoder().encode(content).length;
+      if (size > MAX_FILE_SIZE) {
+        appendSystemMessage(`⚠️ ${name} 超过 500KB 限制（${formatSize(size)}）`);
+        continue;
+      }
+      if (pendingFiles.some(f => f.name === name)) {
+        appendSystemMessage(`ℹ️ ${name} 已添加`);
+        continue;
+      }
+      pendingFiles.push({ name, content, language: detectLanguage(name), size });
+      logInfo(`文件已添加: ${name}`, formatSize(size));
       renderFilePreviews();
     } catch (err) {
       console.error('[InputArea] 文件读取失败:', err);
-      appendSystemMessage(`❌ 读取 ${file.name} 失败`);
+      appendSystemMessage(`❌ 读取 ${name} 失败`);
     }
   }
 }

src/renderer/components/kb-modal.ts

@@ -8,7 +8,7 @@ import {
   removeDocumentFromKB, getDocumentsInCollection, retrieveContext,
   buildRagSystemPrompt
 } from '../services/rag.js';
-import { fileToText, formatSize, escapeHtml, truncate } from '../utils/utils.js';
+import { formatSize, escapeHtml, truncate } from '../utils/utils.js';
 import { showToast } from './toast.js';
 import { showConfirm } from './prompt-modal.js';
 import { OllamaAPI } from '../api/ollama.js';
@@ -31,11 +31,16 @@ export function initKBModal(): void {
 
   document.querySelector('#btnNewCollection')!.addEventListener('click', createCollection);
 
-  document.querySelector('#btnUploadDoc')!.addEventListener('click', () => {
+  document.querySelector('#btnUploadDoc')!.addEventListener('click', async () => {
     if (!currentColId) { showToast('请先选择一个知识库集合', 'warning'); return; }
-    (document.querySelector('#kbFileInput') as HTMLInputElement).click();
+    const bridge = (window as any).metonaDesktop;
+    if (!bridge) return;
+    const paths = await bridge.dialog.openFile({
+      filters: [{ name: '文档', extensions: ['txt', 'md', 'py', 'js', 'ts', 'java', 'go', 'rs', 'cpp', 'c', 'h', 'hpp', 'rb', 'php', 'sh', 'html', 'css', 'json', 'yaml', 'yml', 'toml', 'xml', 'sql', 'csv'] }]
+    });
+    if (!paths || paths.length === 0) return;
+    await handleDocUpload(paths);
   });
-  document.querySelector('#kbFileInput')!.addEventListener('change', handleDocUpload);
 
   document.querySelector('#toggleRAG')!.addEventListener('change', (e) => {
     ragEnabled = (e.target as HTMLInputElement).checked;
@@ -216,47 +221,56 @@ async function createCollection(): Promise<void> {
   await refreshDocList();
 }
 
-async function handleDocUpload(e: Event): Promise<void> {
-  const fileArr = Array.from((e.target as HTMLInputElement).files || []);
-  (e.target as HTMLInputElement).value = '';
-
-  if (fileArr.length === 0) return;
+async function handleDocUpload(paths: string[]): Promise<void> {
+  if (paths.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 bridge = (window as any).metonaDesktop;
   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');
+  for (const filePath of paths) {
+    const name = filePath.split(/[/\\]/).pop() || filePath;
+
+    try {
+      progressEl.style.display = '';
+      progressTextEl.textContent = `正在处理 ${name}...`;
+
+      const result = await bridge.fs.readFile(filePath);
+      if (!result.success) {
+        showToast(`${name} 读取失败: ${result.error}`, 'error');
+        failCount++;
+        continue;
+      }
+      const content = result.content as string;
+      const size = new TextEncoder().encode(content).length;
+
+      if (size > 5 * 1024 * 1024) {
+        showToast(`${name} 超过 5MB 限制`, 'warning');
         failCount++;
         continue;
       }
 
-    try {
-      progressEl.style.display = '';
-      progressTextEl.textContent = `正在处理 ${file.name}...`;
-
-      const content = await fileToText(file);
-      const result = await addDocumentToKB(
-        currentColId!, file.name, content, embedModel,
+      const kbResult = await addDocumentToKB(
+        currentColId!, name, content, embedModel,
         (done, total, msg) => {
-          progressTextEl.textContent = `${file.name}: ${msg} (${done}/${total})`;
+          progressTextEl.textContent = `${name}: ${msg} (${done}/${total})`;
         }
       );
 
-      showToast(`${file.name} 已添加到知识库（${result.chunkCount} 个分块）`, 'success');
-      logRAG(`文档上传: ${file.name}`, `${result.chunkCount} 个分块`);
+      showToast(`${name} 已添加到知识库（${kbResult.chunkCount} 个分块）`, 'success');
+      logRAG(`文档上传: ${name}`, `${kbResult.chunkCount} 个分块`);
       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');
-      logError(`RAG 文档处理失败: ${file.name}`, (err as Error).message);
+      const fileName = filePath.split(/[/\\]/).pop() || filePath;
+      showToast(`${fileName} 处理失败: ${(err as Error).message}`, 'error');
+      logError(`RAG 文档处理失败: ${fileName}`, (err as Error).message);
       failCount++;
     }
   }

src/renderer/components/settings-modal.ts

@@ -4,7 +4,7 @@
 
 import { state, KEYS } from '../state/state.js';
 import { debounce } from '../utils/utils.js';
-import { encryptData, decryptData, isMetonaFile } from '../services/crypto.js';
+import { encryptData, decryptData } from '../services/crypto.js';
 import { setMemoryEnabled } from '../services/memory-manager.js';
 import { setToolEnabled } from '../services/tool-registry.js';
 import { logSetting, logInfo, logWarn, logError, logSuccess } from '../services/log-service.js';
@@ -108,13 +108,15 @@ export function initSettingsModal(): void {
 
   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 = '';
-    }
+  // ── 导入会话：原生文件对话框 ──
+  document.querySelector('#btnImportSessions')!.addEventListener('click', async () => {
+    const bridge = (window as any).metonaDesktop;
+    if (!bridge) return;
+    const paths = await bridge.dialog.openFile({
+      filters: [{ name: 'Metona 备份', extensions: ['metona'] }]
+    });
+    if (!paths || paths.length === 0) return;
+    await importSessions(paths[0]);
   });
 
   // ── Tool Calling 设置 ──
@@ -198,10 +200,35 @@ async function exportAllSessions(): Promise<void> {
   try {
     const blob = await encryptData(backup);
     const ts = new Date().toISOString().slice(0, 10);
+
+    // ── 原生保存对话框 ──
+    const bridge = (window as any).metonaDesktop;
+    if (bridge) {
+      const filePath = await bridge.dialog.saveFile({
+        defaultPath: `metona-backup-${ts}.metona`,
+        filters: [{ name: 'Metona 备份', extensions: ['metona'] }]
+      });
+      if (!filePath) return;
+      // blob → ArrayBuffer → base64 字符串，通过 base64 编码写入二进制文件
+      const buffer = await blob.arrayBuffer();
+      const bytes = new Uint8Array(buffer);
+      let binary = '';
+      for (let i = 0; i < bytes.length; i++) binary += String.fromCharCode(bytes[i]);
+      const b64 = btoa(binary);
+      const result = await bridge.fs.writeFile(filePath, b64, 'base64');
+      if (!result.success) {
+        showToast(`导出失败: ${result.error}`, 'error');
+        logError('导出失败', result.error);
+        return;
+      }
+    } else {
+      // 回退：浏览器下载
       const a = document.createElement('a');
       a.href = URL.createObjectURL(blob);
       a.download = `metona-backup-${ts}.metona`;
       a.click();
+    }
+
     showToast(`已导出 ${sessions.length} 个会话（已加密）`, 'success');
     logSuccess(`导出完成: ${sessions.length} 个会话`);
   } catch (err) {
@@ -211,19 +238,29 @@ async function exportAllSessions(): Promise<void> {
   }
 }
 
-async function importSessions(file: File): Promise<void> {
+async function importSessions(filePath: string): Promise<void> {
   const db = state.get<ChatDB | null>(KEYS.DB);
   if (!db) return;
 
-  if (!isMetonaFile(file)) {
+  const fileName = filePath.split(/[/\\]/).pop() || filePath;
+  if (!fileName.endsWith('.metona')) {
     showToast('仅支持导入 .metona 格式文件', 'error');
     return;
   }
 
   try {
-    const buffer = await file.arrayBuffer();
-    const data = await decryptData(buffer);
-    logInfo('导入会话', `文件: ${file.name}`);
+    const bridge = (window as any).metonaDesktop;
+    const result = await bridge.fs.readFile(filePath);
+    if (!result.success) {
+      showToast(`读取文件失败: ${result.error}`, 'error');
+      return;
+    }
+    // IPC 返回 base64 编码的二进制，转 ArrayBuffer
+    const binary = atob(result.content as string);
+    const bytes = new Uint8Array(binary.length);
+    for (let i = 0; i < binary.length; i++) bytes[i] = binary.charCodeAt(i);
+    const data = await decryptData(bytes.buffer);
+    logInfo('导入会话', `文件: ${fileName}`);
 
     let sessions: ChatSession[];
     if (Array.isArray(data)) {

src/renderer/index.html

@@ -141,8 +141,6 @@
                     <polyline points="10 9 9 9 8 9"/>
                 </svg>
             </button>
-            <input type="file" id="fileInput" accept="image/*" multiple style="display:none;">
-            <input type="file" id="textFileInput" accept=".txt,.md,.log,.csv,.py,.pyw,.js,.mjs,.cjs,.ts,.tsx,.jsx,.java,.c,.h,.cpp,.cc,.hpp,.go,.rs,.rb,.php,.sh,.bash,.zsh,.sql,.html,.htm,.css,.json,.jsonl,.xml,.svg,.yaml,.yml,.toml,.ini,.cfg,.conf,.swift,.kt,.kts,.scala,.lua,.r,.m,.cs,.fs,.ex,.exs,.erl,.hs,.clj,.lisp,.diff,.patch,Dockerfile,Makefile,.rst,.tsv,.vb,.pl,.mm,.pyi,.fsharp,.makefile,.dockerfile" multiple style="display:none;">
             <textarea class="chat-input" id="chatInput" placeholder="输入消息..." rows="1"></textarea>
             <label class="think-toggle" id="thinkToggleWrap" title="Think 模式未可用">
                 <input type="checkbox" id="toggleThink" disabled>
@@ -264,7 +262,6 @@
                 <div style="display:flex;gap:8px;flex-wrap:wrap;">
                     <button class="btn btn-outline" id="btnExportAll">📦 导出全部会话</button>
                     <button class="btn btn-outline" id="btnImportSessions">📥 导入会话</button>
-                    <input type="file" id="importFileInput" accept=".metona" style="display:none;">
                     <button class="btn btn-danger" id="btnClearAllHistory">清空所有历史</button>
                 </div>
                 <p class="text-muted" style="margin-top:6px;font-size:11px;">导出格式为 JSON，可备份后在其他设备导入恢复。</p>
@@ -344,7 +341,6 @@
                 <div class="kb-main">
                     <div class="kb-toolbar">
                         <button class="btn btn-sm btn-outline" id="btnUploadDoc">📄 上传文档</button>
-                        <input type="file" id="kbFileInput" accept=".txt,.md,.py,.js,.ts,.java,.go,.rs,.cpp,.c,.h,.hpp,.rb,.php,.sh,.html,.css,.json,.yaml,.yml,.toml,.xml,.sql,.csv" multiple style="display:none;">
                         <span id="kbProgress" style="display:none;" class="kb-progress">
                             <span class="spinner"></span>
                             <span id="kbProgressText">处理中...</span>

src/renderer/services/crypto.ts

@@ -158,6 +158,3 @@ export async function decryptData(buffer: ArrayBuffer): Promise<unknown> {
   return JSON.parse(new TextDecoder().decode(jsonBytes));
 }
 
-export function isMetonaFile(file: File): boolean {
-  return file.name.endsWith('.metona');
-}

src/renderer/types.d.ts

@@ -198,7 +198,7 @@ export interface MetonaDesktopAPI {
   };
   fs: {
     readFile: (filePath: string) => Promise<{ success: boolean; content?: string; name?: string; error?: string }>;
-    writeFile: (filePath: string, content: string) => Promise<{ success: boolean; error?: string }>;
+    writeFile: (filePath: string, content: string, encoding?: string) => Promise<{ success: boolean; error?: string }>;
   };
   tool: {
     execute: (toolName: string, args: Record<string, unknown>) => Promise<ToolResult>;

src/renderer/utils/utils.ts

@@ -59,30 +59,6 @@ export function downloadFile(filename: string, content: string, type: string): v
   URL.revokeObjectURL(url);
 }
 
-/** File → Base64（去前缀） */
-export function fileToBase64(file: File): Promise<string> {
-  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<string> {
-  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() || '';