feat(ui): add collapsible persistent sidebar

src/hooks/useKeyboardShortcuts.ts

@@ -9,6 +9,7 @@
  * - Ctrl+1~9: 跳转到指定索引标签
  * - Ctrl+W: 关闭当前标签
  * - F11: 全屏切换
+ * - Ctrl/Cmd+B: 折叠/展开侧栏
  * - Ctrl+Shift+N: 新建标签
  * - Ctrl+Shift+P: 打开命令面板
  * - Ctrl+N: 新建会话
@@ -125,6 +126,7 @@ function shouldFireInInput(e: KeyboardEvent): boolean {
     KeybindingAction.TAB_PREV,
     KeybindingAction.TAB_GOTO_N,
     KeybindingAction.VIEW_FULLSCREEN,
+    KeybindingAction.VIEW_TOGGLE_SIDEBAR,
     KeybindingAction.TOOLS_COMMAND_PALETTE,
   ]
 
@@ -202,6 +204,13 @@ export function useKeyboardShortcuts(): void {
         return
       }
 
+      // ---- Ctrl/Cmd+B: 折叠侧栏 ----
+      if (matchesKeySequence(e, keys[KeybindingAction.VIEW_TOGGLE_SIDEBAR])) {
+        e.preventDefault()
+        window.dispatchEvent(new CustomEvent('opsxshell:toggle-sidebar'))
+        return
+      }
+
       // ---- 以下快捷键在输入框中不触发 (除非 fireInInput=true) ----
       if (isInputElement(e) && !shouldFireInInput(e)) {
         return