v0.16.7: 引擎修复 + 工具面板统一 + AGENT.md 改为仅工作空间加载

核心引擎修复:
- 状态转换表补全 THINKING/PARSING/EXECUTING -> COMPRESSING，修复紧急压缩成为死代码的 P1 问题
- 新增跨轮次死循环检测器（软性提示 + 硬性熔断），防止模型陷入重复工具调用死循环
- handleCompressing 空响应回到 THINKING 而非 REFLECTING，避免错误终止
- executeHooks 添加 .catch() 防止未处理的 Promise 拒绝
- ALWAYS_PARALLEL 移除 git 和 browser_evaluate（有副作用的工具不应并行）
- thinking fallback：content 为空但有 thinking 时，用 [推理过程] 作为 content 保留上下文
- 8个写类工具添加专用格式化器（含 success + message 字段）
- 清理死代码：3个未使用函数 + 3个未使用 import

工具面板统一:
- 10个工具独立下拉框统一为1个全局执行模式选择器
- FIFO 队列防止并行 showToolConfirm 导致静默取消
- delete_file 支持 paths 数组参数批量删除

工具定义与实现一致性修复:
- run_command 移除未使用的 timeout 参数，描述改为"超时可配置"
- list_directory 添加 2000 条截断逻辑 + filter_extension 参数
- calculator 正则移除 ^ 字符（parser 用 ** 替代）
- search_files/tree/web_search/fetch_top 描述与实现对齐

消息传递修复:
- trimByTokenLimit 改为原子组选择（assistant+tool_calls 与后续 tool 消息作为一组）
- 历史工具结果复用 formatToolResultForModel，与当前格式一致

AGENT.md 加载策略变更:
- 删除内置 AGENT.md 文件
- 仅从工作空间加载：有则注入，无则跳过

其他修复:
- 修复初始化失败 "Cannot convert undefined or null to object"（saveSetting null 导致 JSON.parse 陷阱）
- 修复工作空间命令行标签页 idle 状态残留导致样式错乱

版本号: 0.16.5 -> 0.16.7

src/renderer/services/tool-registry.ts

@@ -59,6 +59,7 @@ export const TOOL_DEFINITIONS: ToolDefinition[] = [
           recursive: { type: 'boolean', description: 'List recursively. Default: false.' },
           max_depth: { type: 'integer', description: 'Max recursion depth. Default: 3.' },
           include_hidden: { type: 'boolean', description: 'Include hidden files. Default: false.' },
+          filter_extension: { type: 'string', description: 'Filter files by extension (e.g. ".txt"). Only files matching this extension are returned. Default: no filter.' },
           offset: { type: 'integer', description: 'Skip first N entries for pagination. Default: 0.' }
         }
       }
@@ -77,7 +78,7 @@ export const TOOL_DEFINITIONS: ToolDefinition[] = [
           query: { type: 'string', description: 'Search query (glob, text, or regex).' },
           search_type: { type: 'string', enum: ['filename', 'content', 'both'], description: 'Search target. Default: both.' },
           case_sensitive: { type: 'boolean', description: 'Case sensitive. Default: false.' },
-          max_results: { type: 'integer', description: 'Max results. Default: 50.' },
+          max_results: { type: 'integer', description: 'Max results. Default: 0 (no limit).' },
           file_extensions: { type: 'array', items: { type: 'string' }, description: 'Filter extensions, e.g. [".ts", ".js"]' },
           use_regex: { type: 'boolean', description: 'Treat query as regular expression. Default: false.' }
         }
@@ -102,12 +103,12 @@ export const TOOL_DEFINITIONS: ToolDefinition[] = [
     type: 'function',
     function: {
       name: 'delete_file',
-      description: 'Delete a file or directory. Returns deleted item count and total size. Use recursive=true for non-empty directories.',
+      description: 'Delete a file or directory. Supports batch deletion via paths parameter. At least one of path or paths must be provided. Returns deleted item count and total size. Use recursive=true for non-empty directories.',
       parameters: {
         type: 'object',
-        required: ['path'],
         properties: {
-          path: { type: 'string', description: 'Path to delete.' },
+          path: { type: 'string', description: 'Single path to delete. Use this for deleting one file/directory.' },
+          paths: { type: 'array', items: { type: 'string' }, description: 'Multiple paths to delete in batch. Use this when deleting multiple files at once.' },
           recursive: { type: 'boolean', description: 'Recursive delete for directories. Returns filesDeleted count and total deletedSize.' }
         }
       }
@@ -117,7 +118,7 @@ export const TOOL_DEFINITIONS: ToolDefinition[] = [
     type: 'function',
     function: {
       name: 'run_command',
-      description: 'Execute a shell command via workspace. No timeout limit — runs until the process exits. Requires user confirmation. Output is streamed in real-time through the workspace process.',
+      description: 'Execute a shell command via workspace. Timeout configurable (default 300s for general, 600s for long-running). cwd defaults to workspace directory. Requires user confirmation. Output is streamed in real-time through the workspace process.',
       parameters: {
         type: 'object',
         required: ['command'],
@@ -219,7 +220,7 @@ export const TOOL_DEFINITIONS: ToolDefinition[] = [
         required: ['path'],
         properties: {
           path: { type: 'string', description: 'Root directory path.' },
-          max_depth: { type: 'integer', description: 'Max depth. Default: 3.' },
+          max_depth: { type: 'integer', description: 'Max depth. Default: 5.' },
           include_hidden: { type: 'boolean', description: 'Include hidden files. Default: false.' }
         }
       }
@@ -717,6 +718,13 @@ export function setRunCommandMode(mode: ToolMode): void {
   setToolMode('run_command', mode);
 }
 
+/** 初始化全局工具模式（从数据库加载） */
+export function initGlobalToolMode(mode: ToolMode): void {
+  for (const toolName of MODE_TOOLS) {
+    setToolMode(toolName, mode);
+  }
+}
+
 let enabledTools: Set<string> = new Set([
   'read_file', 'list_directory', 'search_files',
   'write_file', 'create_directory', 'delete_file',