docs: phase 3 completion tracking and handoff cleanup

- record phase 3 completion state and session continuity
- consume one-shot HANDOFF.json
- fix duplicate blocked count in 01-UAT.md

.gsd/dispatch-isolation-sentinel.json

@@ -1 +1 @@
-{"isolation":"none","harness_flag":null,"phase":"02","plan":null,"written_at":1788938482625}
+{"isolation":"harness-worktree","harness_flag":"isolation=\"worktree\"","phase":"03","plan":null,"written_at":1789138005150}

.planning/HANDOFF.json

@@ -1,40 +0,0 @@
-{
-  "version": "1.0",
-  "timestamp": "2026-09-11T15:14:49.010Z",
-  "phase": "03",
-  "phase_name": "data-completion",
-  "phase_dir": ".planning/phases/03-data-completion",
-  "plan": 18,
-  "task": 3,
-  "total_tasks": 3,
-  "status": "paused",
-  "completed_tasks": [
-    {"id": 1, "name": "Own event registrations as explicit classes", "status": "done", "commit": "cb716f6"},
-    {"id": 2, "name": "Move event registration assembly out of the barrel", "status": "done", "commit": "0dc30aa"},
-    {"id": 3, "name": "Cover event registration ownership and barrel purity", "status": "done", "commit": "a69130c"}
-  ],
-  "remaining_tasks": [
-    {"id": 19, "name": "Multiline JSDoc and style correction", "status": "not_started"}
-  ],
-  "blockers": [
-    {
-      "description": "User requested a pause after Plan 03-18 completed, before executing Plan 03-19.",
-      "type": "human_action",
-      "workaround": "Resume with /gsd-resume-work or run /gsd-execute-phase 3 to execute the remaining Plan 03-19."
-    }
-  ],
-  "async_jobs": [],
-  "human_actions_pending": [],
-  "decisions": [
-    {"decision": "event/index.ts and data-state/src/index.ts are export-only; no imports or registration assembly remain in barrels.", "rationale": "CORR-03-12 requires barrels to stop executing registration logic.", "phase": "03"},
-    {"decision": "Eight explicit registration classes own their stable EventBuiltinName and callable func; registrations.ts is the sole deterministic assembler used by CoreState.", "rationale": "CORR-03-13 replaces module-factory registrations with explicit class-based ownership.", "phase": "03"},
-    {"decision": "eventTouchFront and its invocation/target resolution moved to the hero event layer; event.ts retains only the two Statement[] insertion operations.", "rationale": "Front-touch is hero-owned; the approved eight-name order and semantics stay unchanged.", "phase": "03"},
-    {"decision": "Ran prettier --write on plan-owned files and patched the temporary scope-guard script for Windows PowerShell 5.1.", "rationale": "Rule 3 blocking fixes for the CRLF/Prettier gate and the unavailable pwsh; no repository code affected.", "phase": "03"}
-  ],
-  "uncommitted_files": [
-    " M .gsd/dispatch-isolation-sentinel.json",
-    " M .planning/phases/01-event/01-UAT.md"
-  ],
-  "next_action": "Run /gsd-resume-work, then execute Plan 03-19 (wave 12) via /gsd-execute-phase 3. Plan 03-19 depends on 03-18 and shares event/replay files, so it must run sequentially.",
-  "context_notes": "Plan 03-18 completed all 3 tasks and was committed (summary at .planning/phases/03-data-completion/03-18-SUMMARY.md). CORR-03-12 and CORR-03-13 are closed. Plan 03-19 (CORR-03-14, multiline JSDoc/style) is the last remaining plan for Phase 3. After 03-19, the execute-phase tail gates + verifier must run. Note the project-wide state inconsistency (ROADMAP/STATE previously claimed Phase 3 complete while 03-18/03-19 were outstanding). Preserve the two uncommitted working-tree files and user-owned @shouldReplay decorator placement."
-}

.planning/STATE.md

@@ -5,8 +5,8 @@ milestone_name: milestone
 current_phase: 4
 current_phase_name: 渲染适配与双布局
 status: planning
-stopped_at: Completed 03-19-PLAN.md
-last_updated: "2026-09-12T05:39:17.815Z"
+stopped_at: Phase 3 complete — session stopped by user; next is Phase 4 discuss/plan
+last_updated: "2026-09-12T05:40:08.183Z"
 last_activity: 2026-09-12
 last_activity_desc: Phase 03 complete, transitioned to Phase 4
 progress:
@@ -156,6 +156,6 @@ None yet.
 
 ## Session Continuity
 
-Last session: 2026-09-12T05:28:03.477Z
-Stopped at: Completed 03-19-PLAN.md
+Last session: 2026-09-12T05:40:08.149Z
+Stopped at: Phase 3 complete — session stopped by user; next is Phase 4 discuss/plan
 Resume file: None

.planning/phases/01-event/01-UAT.md

@@ -3,7 +3,7 @@ status: partial
 phase: 01-event
 source: 01-01-SUMMARY.md, 01-02-SUMMARY.md, 01-03-SUMMARY.md, 01-04-SUMMARY.md, 01-05-SUMMARY.md, 01-06-SUMMARY.md, 01-07-SUMMARY.md, 01-08-SUMMARY.md, 01-09-SUMMARY.md, 01-10-SUMMARY.md, 01-11-SUMMARY.md, 01-12-SUMMARY.md, 01-13-SUMMARY.md
 started: 2026-09-09T05:10:00Z
-updated: "2026-09-10T00:00:00Z"
+updated: "2026-09-11T00:00:00Z"
 ---
 
 ## Current Test
@@ -215,7 +215,6 @@ issues: 0
 pending: 0
 skipped: 0
 blocked: 1
-blocked: 1
 
 ## Gaps