refactor(phase-11): extract specialized stores from gatewayStore

Decompose monolithic gatewayStore.ts (1660 lines) into focused stores:

- connectionStore.ts (444 lines) - WebSocket, auth, local gateway
- agentStore.ts (256 lines) - Clones, usage stats, plugins
- handStore.ts (498 lines) - Hands, triggers, approvals
- workflowStore.ts (255 lines) - Workflows, runs
- configStore.ts (537 lines) - QuickConfig, channels, skills

Each store uses client injection pattern for loose coupling.
Coordinator layer to be added in next commit.

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

docs/SYSTEM_ANALYSIS.md

@@ -560,4 +560,19 @@ ZCLAW 是基于 **OpenFang** (Rust Agent OS) 的 AI Agent 桌面客户端，核
     * ✅ chatStore 测试通过 (11/11)
     * ✅ gatewayStore 测试通过 (17/17)
 
-*下一步: Phase 11 Store 重构*
+*Phase 11 进行中 🔄 (2026-03-15)* - Store 重构分解
+  * 新 Store 文件:
+    * ✅ `connectionStore.ts` (444 行) - WebSocket 连接、认证、本地 Gateway
+    * ✅ `agentStore.ts` (256 行) - Clones、使用统计、插件状态
+    * ✅ `handStore.ts` (498 行) - Hands、Triggers、Approvals
+    * ✅ `workflowStore.ts` (255 行) - Workflows、WorkflowRuns
+    * ✅ `configStore.ts` (537 行) - QuickConfig、Channels、Skills、Models
+  * Store 行数: gatewayStore 1660 → 5 个子 Store (平均 358 行)
+  * 待完成:
+    * 🔄 创建协调层 (coordinator)
+    * 🔄 更新组件导入
+  * 代码质量:
+    * ✅ TypeScript 类型检查通过
+
+*下一步: Phase 11 协调层创建*
+