fix: Diff打开后立即触发状态栏刷新 + 临时文件只在Accept/Reject时删除

- showFileDiff/showEditDiff 末尾调用 onDiffAction 通知状态栏切换 Diff 模式
- deleteSessionFiles 独立方法，只在 Accept/Reject 时调用
- clearSession 仅清除会话状态，不删文件（手动关 Diff 后可重新打开）

src/render/diffViewer.ts

@@ -3,8 +3,9 @@
  *
  * 关键:
  * 1. 临时文件（非 untitled）避免保存提示
- * 2. Accept/Reject 后自动推进到下一个 pending 文件
- * 3. 状态栏按钮在 Diff 模式下可见
+ * 2. ★ 临时文件只在 Accept/Reject 后删除，手动关闭 Diff 不影响
+ * 3. Accept/Reject 后自动推进到下一个 pending 文件
+ * 4. 状态栏按钮在 Diff 模式下可见
  */
 
 import * as vscode from 'vscode';
@@ -63,6 +64,9 @@ export class DiffViewer {
       this.activeSession!.afterUri,
       `${fileName} — AI ${toolLabel} #${editRecord.id.slice(0, 6)} · 状态栏操作`
     );
+
+    // ★ 通知外部刷新状态栏（切换到 Diff 模式显示 Accept/Reject 按钮）
+    this.onDiffAction?.();
   }
 
   async showFileDiff(fileChange: FileChange): Promise<void> {
@@ -86,6 +90,9 @@ export class DiffViewer {
       this.activeSession!.afterUri,
       `${fileName} — ${fileChange.edits.length} 次 AI 编辑 · 状态栏操作`
     );
+
+    // ★ 通知外部刷新状态栏（切换到 Diff 模式显示 Accept/Reject 按钮）
+    this.onDiffAction?.();
   }
 
   async showCurrentFileDiff(): Promise<void> {
@@ -103,6 +110,8 @@ export class DiffViewer {
 
   // ---- Diff 界面操作 (Bug 1 修复: 自动推进) ----
 
+  // ★ Accept/Reject 后删除临时文件 + 关闭 Diff
+
   async acceptCurrentDiff(): Promise<void> {
     if (!this.activeSession) return;
     const { fileId, editId } = this.activeSession;
@@ -114,10 +123,9 @@ export class DiffViewer {
     }
 
     vscode.window.showInformationMessage('AI Diff: 已接受 ✓');
+    this.deleteSessionFiles();  // ★ Accept 后才删
     await this.closeDiff();
     this.onDiffAction?.();
-
-    // ★ Bug 1 修复: 自动推进到下一个待处理文件
     this.advanceToNext(fileId);
   }
 
@@ -132,14 +140,12 @@ export class DiffViewer {
     }
 
     vscode.window.showInformationMessage('AI Diff: 已拒绝 ✗');
+    this.deleteSessionFiles();  // ★ Reject 后才删
     await this.closeDiff();
     this.onDiffAction?.();
-
-    // ★ Bug 1 修复: 自动推进
     this.advanceToNext(fileId);
   }
 
-  /** ★ 接受当前文件的所有编辑 (Diff 界面 Accept All) */
   async acceptAllFromDiff(): Promise<void> {
     if (!this.activeSession) return;
     const { fileId } = this.activeSession;
@@ -147,6 +153,7 @@ export class DiffViewer {
     if (ok) {
       vscode.window.showInformationMessage('AI Diff: 已接受此文件全部 ✓');
     }
+    this.deleteSessionFiles();  // ★ AcceptAll 后才删
     await this.closeDiff();
     this.onDiffAction?.();
     this.advanceToNext(fileId);
@@ -209,15 +216,19 @@ export class DiffViewer {
     });
   }
 
+  /** ★ 删除当前会话的临时文件（只在 Accept/Reject 时调用） */
+  private deleteSessionFiles(): void {
+    if (!this.activeSession) return;
+    [this.activeSession.beforeTmpPath, this.activeSession.afterTmpPath].forEach(p => {
+      try { if (fs.existsSync(p)) fs.unlinkSync(p); } catch { /* ok */ }
+    });
+    this.tmpFiles = this.tmpFiles.filter(
+      f => f !== this.activeSession!.beforeTmpPath && f !== this.activeSession!.afterTmpPath
+    );
+  }
+
+  /** 清除会话状态（不删文件！手动关闭 Diff 后不影响重新打开） */
   private clearSession(): void {
-    if (this.activeSession) {
-      [this.activeSession.beforeTmpPath, this.activeSession.afterTmpPath].forEach(p => {
-        try { if (fs.existsSync(p)) fs.unlinkSync(p); } catch { /* ok */ }
-      });
-      this.tmpFiles = this.tmpFiles.filter(
-        f => f !== this.activeSession!.beforeTmpPath && f !== this.activeSession!.afterTmpPath
-      );
-    }
     this.activeSession = null;
     if (this.closeListener) { this.closeListener.dispose(); this.closeListener = null; }
   }