docs(state): record phase 13 context session

.planning/STATE.md

@@ -1,16 +1,16 @@
 ---
 gsd_state_version: 1.0
-milestone: v1.6
-milestone_name: 语义分段改进
-status: in_progress
-stopped_at: Planning Phase 13
-last_updated: "2026-03-21T16:30:00.000Z"
+milestone: v1.4
+milestone_name: Zhihu Anti-Crawler
+status: planning
+stopped_at: Phase 13 context gathered
+last_updated: "2026-03-21T16:14:07.594Z"
 last_activity: 2026-03-21 — Roadmap created for v1.6
 progress:
-  total_phases: 3
-  completed_phases: 0
-  total_plans: 0
-  completed_plans: 0
+  total_phases: 15
+  completed_phases: 10
+  total_plans: 31
+  completed_plans: 30
   percent: 0
 ---
 
@@ -100,8 +100,8 @@ None.
 
 ## Session Continuity
 
-Last session: 2026-03-21
-Stopped at: Roadmap created for v1.6
-Resume file: None
+Last session: 2026-03-21T16:14:07.592Z
+Stopped at: Phase 13 context gathered
+Resume file: .planning/phases/13-llm/13-CONTEXT.md
 
 **Next step:** `/gsd:plan-phase 13` - 开始 Phase 13 的详细规划