fix(growth,kernel,runtime,desktop): 50 轮功能链路审计 7 项断链修复

P0 修复:
- B-MEM-2: 跨会话记忆丢失 — 添加 IdentityRecall 查询意图检测，
  身份类查询绕过 FTS5/LIKE 文本搜索，直接按 scope 检索全部偏好+知识记忆；
  缓存 GrowthIntegration 到 Kernel 避免每次请求重建空 scorer
- B-HAND-1: Hands 未触发 — 创建 HandTool wrapper 实现 Tool trait，
  在 create_tool_registry() 中注册所有已启用 Hands 为 LLM 可调用工具

P1 修复:
- B-SCHED-4: 一次性定时未拦截 — 添加 RE_ONE_SHOT_TODAY 正则匹配
  "下午3点半提醒我..."类无日期前缀的同日触发模式
- B-CHAT-2: 工具调用循环 — ToolErrorMiddleware 添加连续失败计数器，
  3 次连续失败后自动 AbortLoop 防止无限重试
- B-CHAT-5: Stream 竞态 — cancelStream 后添加 500ms cancelCooldown，
  防止后端 active-stream 检查竞态

desktop/src/store/chat/streamStore.ts

@@ -113,6 +113,8 @@ interface ChatStoreAccess {
 
 export interface StreamState {
   isStreaming: boolean;
+  /** Brief cooldown after cancelStream — prevents race with backend active-stream check */
+  cancelCooldown: boolean;
   isLoading: boolean;
   chatMode: ChatModeType;
   suggestions: string[];
@@ -201,6 +203,7 @@ export const useStreamStore = create<StreamState>()(
   persist(
     (set, get) => ({
   isStreaming: false,
+  cancelCooldown: false,
   isLoading: false,
   chatMode: 'thinking' as ChatModeType,
   suggestions: [],
@@ -230,7 +233,7 @@ export const useStreamStore = create<StreamState>()(
   // ── Core: sendMessage ──
 
   sendMessage: async (content: string) => {
-    if (get().isStreaming) return;
+    if (get().isStreaming || get().cancelCooldown) return;
     if (!_chat) {
       log.warn('sendMessage called before chatStore injection');
       return;
@@ -678,9 +681,12 @@ export const useStreamStore = create<StreamState>()(
     }
 
     // 4. Reset streaming state and clear sessionKey so next send gets a fresh session
-    set({ isStreaming: false, activeRunId: null });
+    set({ isStreaming: false, activeRunId: null, cancelCooldown: true });
     useConversationStore.setState({ sessionKey: null });
     log.info('Stream cancelled by user');
+
+    // 5. Brief cooldown to prevent race with backend active-stream check
+    setTimeout(() => set({ cancelCooldown: false }), 500);
   },
 
   // ── Agent Stream Listener ──