docs(20-02): complete template hint quick-fill plan

- Task 1 committed: DocumentPageClient fields fetch + selectedFieldHint derivation + PreparePanel hint chip
- Awaiting human-verify checkpoint (Task 2)

.planning/STATE.md

@@ -2,15 +2,15 @@
 gsd_state_version: 1.0
 milestone: v1.1
 milestone_name: Smart Document Preparation
-status: executing
-stopped_at: Completed 20-01-PLAN.md — apply template and portal nav
-last_updated: "2026-04-06T20:52:20.693Z"
+status: verifying
+stopped_at: Completed 20-02 Task 1 — awaiting human verify checkpoint (Task 2)
+last_updated: "2026-04-06T20:55:04.742Z"
 last_activity: 2026-04-06
 progress:
   total_phases: 22
-  completed_phases: 20
+  completed_phases: 21
   total_plans: 65
-  completed_plans: 63
+  completed_plans: 64
   percent: 98
 ---
 
@@ -26,7 +26,7 @@ See: .planning/PROJECT.md (updated 2026-04-03)
 
 Phase: 20 (apply-template-and-portal-nav) — EXECUTING
 Plan: 2 of 2
-Status: Ready to execute
+Status: Phase complete — ready for verification
 Last activity: 2026-04-06
 
 ## Note on v1.1
@@ -109,6 +109,7 @@ Progress: [██████████████░] 98% (19/22 phases comp
 | Phase 19-template-editor-ui P03 | 1 | 1 tasks | 0 files |
 | Phase 19 P03 | <1 | 1 tasks | 0 files |
 | Phase 20-apply-template-and-portal-nav P01 | 2 | 2 tasks | 2 files |
+| Phase 20-apply-template-and-portal-nav P02 | 2 | 1 tasks | 2 files |
 
 ## Accumulated Context
 
@@ -205,6 +206,7 @@ Recent decisions affecting v1.1 work:
 - [Phase 19-03]: All five TMPL requirements (TMPL-05 through TMPL-09) verified by human in a single 9-step live browser test
 - [Phase 20-apply-template-and-portal-nav]: documentTemplateId branch in POST /api/documents returns early so all existing paths unchanged; fresh crypto.randomUUID per field ensures snapshot independence
 - [Phase 20-apply-template-and-portal-nav]: My Templates tab lazy-fetches /api/templates on first click via docTemplatesLoaded flag to avoid unnecessary network requests
+- [Phase 20-apply-template-and-portal-nav]: Fields fetched on mount and aiPlacementKey change so hint stays current after AI auto-place; selectedFieldHint passed as optional prop to PreparePanel for backwards compatibility
 
 ### v1.2 Pre-decisions (from research)
 
@@ -240,6 +242,6 @@ None yet.
 
 ## Session Continuity
 
-Last session: 2026-04-06T20:52:20.690Z
-Stopped at: Completed 20-01-PLAN.md — apply template and portal nav
+Last session: 2026-04-06T20:55:04.738Z
+Stopped at: Completed 20-02 Task 1 — awaiting human verify checkpoint (Task 2)
 Resume file: None