fix: 修复 buddy 命令 ESC 关闭后进入永久 loading 状态

CancelRequestHandler 先于 BuddyPanel 的 ESC handler 拦截按键，
仅清除面板但未 resolve processSlashCommand 中的 Promise，
导致 queryGuard 卡在 dispatching 状态。通过在 setToolJSX
中增加 onDismiss 回调，在面板被外部清除时同步 resolve Promise。

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/utils/handlePromptSubmit.ts

@@ -313,6 +313,15 @@ export async function handlePromptSubmit(
           shouldHidePromptInput: false,
           isLocalJSXCommand: true,
           isImmediate: true,
+          onDismiss: () => {
+            if (doneWasCalled) return
+            doneWasCalled = true
+            setToolJSX({
+              jsx: null,
+              shouldHidePromptInput: false,
+              clearLocalJSX: true,
+            })
+          },
         })
       }
       return

src/utils/processUserInput/processSlashCommand.tsx

@@ -839,6 +839,13 @@ async function getMessagesForSlashCommand(
                 showSpinner: false,
                 isLocalJSXCommand: true,
                 isImmediate: command.immediate === true,
+                // When the panel is dismissed externally (ESC via CancelRequestHandler),
+                // resolve the Promise so executeUserInput doesn't hang forever.
+                onDismiss: () => {
+                  if (doneWasCalled) return
+                  doneWasCalled = true
+                  void resolve({ messages: [], shouldQuery: false, command })
+                },
               })
             })
             .catch(e => {