feat: 支持 PreToolUse 事件，AskUserQuestion 触发通知

- handler.go 添加 PreToolUse 事件处理，提取 AskUserQuestion 的 question 字段作为通知内容
- README.md 更新 hooks 配置示例、支持事件文档和测试命令

handler.go

@@ -49,6 +49,8 @@ func (h *HookHandler) HandleHook(w http.ResponseWriter, r *http.Request) {
 		title, message, priority = h.handleNotification(event)
 	case "Stop":
 		title, message, priority = h.handleStop(event)
+	case "PreToolUse":
+		title, message, priority = h.handlePreToolUse(event)
 	default:
 		log.Printf("ignored event: %s", event.HookEventName)
 		w.WriteHeader(http.StatusOK)
@@ -90,6 +92,24 @@ func (h *HookHandler) handleNotification(event ClaudeCodeHookEvent) (title, mess
 	return title, message, priority
 }
 
+func (h *HookHandler) handlePreToolUse(event ClaudeCodeHookEvent) (title, message string, priority int) {
+	switch event.ToolName {
+	case "AskUserQuestion":
+		title = "Claude Code - 等待回答"
+		if question, ok := event.ToolInput["question"].(string); ok && question != "" {
+			message = "Claude 向你提问: " + question
+		} else {
+			message = "Claude 向你提出了一个问题，等待你的回答"
+		}
+		priority = 6
+	default:
+		title = "Claude Code - 工具调用"
+		message = fmt.Sprintf("Claude 正在使用 %s", event.ToolName)
+		priority = 4
+	}
+	return title, message, priority
+}
+
 func (h *HookHandler) handleStop(event ClaudeCodeHookEvent) (title, message string, priority int) {
 	if event.StopHookActive {
 		// Avoid infinite loop: Stop hook triggered too many times