refactor: 用 StopFailure 事件替代定时轮询，移除空闲检测定时器

- 移除 heartbeat 空闲检测机制（PreToolUse 空 matcher）
- 新增 StopFailure hooks 处理 API 错误中断场景
- PostToolUse 仅保留 Edit（Write 通过 PreToolUse 快照实现）
- 移除 extension.ts 中 idleTimer/idleCooldown/heartbeatWatcher
- 更新 README hooks 配置文档
- 添加 MIT LICENSE

README.md

@@ -22,13 +22,25 @@
 ```json
 {
   "hooks": {
-    "PostToolUse": [
+    "PreToolUse": [
       {
-        "matcher": "Write|Edit",
+        "matcher": "Write",
         "hooks": [
           {
             "type": "command",
-            "command": "node -e \"const fs=require('fs'),p=require('path'),d=p.join(process.env.CLAUDE_PLUGIN_ROOT||'.','.claude','hooks');let b='';process.stdin.on('data',c=>b+=c);process.stdin.on('end',()=>{try{const j=JSON.parse(b);const e={type:'edit',filePath:j.tool_input?.file_path||j.tool_response?.filePath||'',content:j.tool_input?.content||'',oldString:j.tool_input?.old_string||'',newString:j.tool_input?.new_string||'',timestamp:Date.now(),toolName:j.tool_name};fs.mkdirSync(d,{recursive:true});const t=p.join(d,'pending.json'),tmp=t+'.tmp';fs.writeFileSync(tmp,JSON.stringify(e));fs.renameSync(tmp,t)}catch{}})\"",
+            "command": "node -e \"const fs=require('fs'),p=require('path');let b='';process.stdin.on('data',c=>b+=c);process.stdin.on('end',()=>{try{const j=JSON.parse(b);const fp=j.tool_input?.file_path;if(!fp)return;const d=p.join(process.env.CLAUDE_PLUGIN_ROOT||'.','.claude','hooks');fs.mkdirSync(d,{recursive:true});let oc='';try{oc=fs.readFileSync(fp,'utf-8')}catch(e){}const s={originalContent:oc,timestamp:Date.now()};const f=p.join(d,'pre-write-snapshot.json'),tmp=f+'.tmp';fs.writeFileSync(tmp,JSON.stringify(s));fs.renameSync(tmp,f)}catch(e){}})\"",
+            "timeout": 5
+          }
+        ]
+      }
+    ],
+    "PostToolUse": [
+      {
+        "matcher": "Edit",
+        "hooks": [
+          {
+            "type": "command",
+            "command": "node -e \"const fs=require('fs'),p=require('path'),d=p.join(process.env.CLAUDE_PLUGIN_ROOT||'.','.claude','hooks');let b='';process.stdin.on('data',c=>b+=c);process.stdin.on('end',()=>{try{const j=JSON.parse(b);const e={type:'edit',filePath:j.tool_input?.file_path||'',content:j.tool_input?.content||'',oldString:j.tool_input?.old_string||'',newString:j.tool_input?.new_string||'',timestamp:Date.now(),toolName:'Edit'};fs.mkdirSync(d,{recursive:true});const t=p.join(d,'pending.json'),tmp=t+'.tmp';fs.writeFileSync(tmp,JSON.stringify(e));fs.renameSync(tmp,t)}catch{}})\"",
             "timeout": 5
           }
         ]
@@ -44,20 +56,40 @@
           }
         ]
       }
+    ],
+    "StopFailure": [
+      {
+        "hooks": [
+          {
+            "type": "command",
+            "command": "node -e \"const fs=require('fs'),p=require('path'),d=p.join(process.env.CLAUDE_PLUGIN_ROOT||'.','.claude','hooks');try{fs.mkdirSync(d,{recursive:true});const t=p.join(d,'pending.json'),tmp=t+'.tmp';fs.writeFileSync(tmp,JSON.stringify({type:'stopFailure',filePath:'',content:'',oldString:'',newString:'',timestamp:Date.now(),toolName:'StopFailure'}));fs.renameSync(tmp,t)}catch{}\"",
+            "timeout": 5
+          }
+        ]
+      }
     ]
   }
 }
 ```
 
+### Hooks 说明
+
+| Hook | 匹配器 | 作用 |
+| --- | --- | --- |
+| **PreToolUse** | `Write` | 写入前保存文件原始内容快照，用于 diff 对比 |
+| **PostToolUse** | `Edit` | 记录编辑信息（oldString/newString），用于精确 diff |
+| **Stop** | — | Claude 正常完成响应 → 触发变更总览 |
+| **StopFailure** | — | API 错误导致中断 → 触发变更总览 |
+
 ## 命令
 
-| 命令                              | 快捷键           | 功能                                     |
-| --------------------------------- | ---------------- | ---------------------------------------- |
+| 命令 | 快捷键 | 功能 |
+| --- | --- | --- |
 | `AI Diff: 显示所有变更文件列表` | `Ctrl+Shift+D` | QuickPick 总览 + Accept All / Reject All |
-| `AI Diff: 下一个变更`           | `Alt+↓`       | 跳转下一个 pending 文件                  |
-| `AI Diff: 上一个变更`           | `Alt+↑`       | 跳转上一个 pending 文件                  |
-| `AI Diff: 接受所有变更`         | `Ctrl+Shift+A` | Accept All                               |
-| `AI Diff: 拒绝所有变更`         | `Ctrl+Shift+R` | Reject All                               |
+| `AI Diff: 下一个变更` | `Alt+↓` | 跳转下一个 pending 文件 |
+| `AI Diff: 上一个变更` | `Alt+↑` | 跳转上一个 pending 文件 |
+| `AI Diff: 接受所有变更` | `Ctrl+Shift+A` | Accept All |
+| `AI Diff: 拒绝所有变更` | `Ctrl+Shift+R` | Reject All |
 
 Diff 编辑器打开后，状态栏右侧自动出现 **Accept / Reject / 接受全部** 按钮。