docs(21-03): complete card navigation rewire and panel removal plan

- SUMMARY.md with 2 tasks, 10 files modified, 3 deviations documented
- STATE.md updated with position, decisions, metrics
- Requirements DETAIL-04, DETAIL-05 marked complete

.planning/REQUIREMENTS.md

@@ -63,8 +63,8 @@ Requirements for this milestone. Each maps to roadmap phases.
 - [ ] **DETAIL-01**: Clicking a collection item navigates to a full detail page (`/items/:id`) showing all item data
 - [ ] **DETAIL-02**: Clicking a catalog search result navigates to a public detail page (`/global-items/:id`) with "Add to Collection" button
 - [ ] **DETAIL-03**: Item detail page has edit mode toggle for modifying personal fields (notes, category, quantity, purchase price)
-- [ ] **DETAIL-04**: Thread candidates navigate to detail pages instead of opening slide-out panels
+- [x] **DETAIL-04**: Thread candidates navigate to detail pages instead of opening slide-out panels
-- [ ] **DETAIL-05**: Slide-out panels for items and candidates are removed from the application
+- [x] **DETAIL-05**: Slide-out panels for items and candidates are removed from the application
 
 ### Tags
 
@@ -184,8 +184,8 @@ Which phases cover which requirements. Updated during roadmap creation.
 | DETAIL-01 | Phase 21 | Pending |
 | DETAIL-02 | Phase 21 | Pending |
 | DETAIL-03 | Phase 21 | Pending |
-| DETAIL-04 | Phase 21 | Pending |
+| DETAIL-04 | Phase 21 | Complete |
-| DETAIL-05 | Phase 21 | Pending |
+| DETAIL-05 | Phase 21 | Complete |
 
 **Coverage:**
 - v2.0 requirements: 45 total

.planning/STATE.md

@@ -3,14 +3,14 @@ gsd_state_version: 1.0
 milestone: v1.3
 milestone_name: Research & Decision Tools
 status: planning
-stopped_at: Completed 20-02-PLAN.md
+stopped_at: Completed 21-03-PLAN.md
-last_updated: "2026-04-06T06:17:39.050Z"
+last_updated: "2026-04-06T13:14:25.653Z"
 last_activity: 2026-04-06
 progress:
-  total_phases: 14
+  total_phases: 15
   completed_phases: 13
   total_plans: 38
-  completed_plans: 36
+  completed_plans: 37
   percent: 0
 ---
 
@@ -58,6 +58,9 @@ Key decisions made during v2.0 planning:
 - [Phase 20]: Created tags table in schema (was missing, needed for GET /api/tags endpoint)
 - [Phase 20]: FAB visible on all authenticated routes, not just collection gear tab
 - [Phase 20]: Add button on catalog search cards is a stub (Phase 21 wires actual flow)
+- [Phase 21]: Preserved currentThreadId derivation in __root.tsx for CandidateDeleteDialog
+- [Phase 21]: CollectionView empty state Add button rewired to catalog search overlay
+- [Phase 21]: ItemForm/CandidateForm decoupled from UIStore with onClose prop pattern
 
 ### Pending Todos
 
@@ -68,6 +71,7 @@ None active.
 | # | Description | Date | Commit | Directory |
 |---|-------------|------|--------|-----------|
 | 260406-j44 | Comprehensive dev seed script for bikepacking gear data | 2026-04-06 | — | [260406-j44-comprehensive-dev-seed-script-for-bikepa](./quick/260406-j44-comprehensive-dev-seed-script-for-bikepa/) |
+| Phase 21 P03 | 6min | 2 tasks | 10 files |
 
 ### Blockers/Concerns
 
@@ -76,6 +80,6 @@ None active.
 
 ## Session Continuity
 
-Last session: 2026-04-06T06:12:00.000Z
+Last session: 2026-04-06T13:14:25.651Z
-Stopped at: Completed 20-02-PLAN.md
+Stopped at: Completed 21-03-PLAN.md
 Resume file: None

.planning/phases/21-item-catalog-detail-pages/21-03-SUMMARY.md

@@ -0,0 +1,143 @@
+---
+phase: 21-item-catalog-detail-pages
+plan: 03
+subsystem: ui
+tags: [react, tanstack-router, navigation, panel-removal, uistore]
+
+requires:
+  - phase: 21-item-catalog-detail-pages
+    provides: "Item detail page at /items/:id (Plan 01), Candidate detail page at /threads/:threadId/candidates/:candidateId (Plan 02)"
+provides:
+  - "All card components navigate to detail pages instead of opening panels"
+  - "Slide-out panels removed from root layout"
+  - "UIStore cleaned of all panel-related state"
+affects: [phase-22]
+
+tech-stack:
+  added: []
+  patterns:
+    - "Card click navigation via useNavigate instead of UIStore panel state"
+    - "Catalog search card click closes overlay then navigates to detail page"
+
+key-files:
+  created: []
+  modified:
+    - src/client/components/ItemCard.tsx
+    - src/client/components/CandidateCard.tsx
+    - src/client/components/CandidateListItem.tsx
+    - src/client/components/CatalogSearchOverlay.tsx
+    - src/client/routes/__root.tsx
+    - src/client/stores/uiStore.ts
+    - src/client/components/CollectionView.tsx
+    - src/client/components/ItemForm.tsx
+    - src/client/components/CandidateForm.tsx
+    - src/client/routes/threads/$threadId.tsx
+
+key-decisions:
+  - "Preserved currentThreadId derivation in __root.tsx for CandidateDeleteDialog dependency"
+  - "CollectionView empty state Add button now opens catalog search instead of removed add panel"
+  - "ItemForm and CandidateForm migrated to onClose prop pattern instead of UIStore panel close"
+
+patterns-established:
+  - "Navigation-first pattern: card clicks navigate to detail pages, no more slide-out panels"
+  - "Form onClose prop: forms accept optional onClose callback instead of coupling to UIStore"
+
+requirements-completed: [DETAIL-04, DETAIL-05]
+
+duration: 6min
+completed: 2026-04-06
+---
+
+# Phase 21 Plan 03: Card Navigation Rewire & Panel Removal Summary
+
+**All card components rewired from slide-out panels to detail page navigation, panels removed from root layout, UIStore cleaned of panel state**
+
+## Performance
+
+- **Duration:** 6 min
+- **Started:** 2026-04-06T13:04:59Z
+- **Completed:** 2026-04-06T13:11:00Z
+- **Tasks:** 2
+- **Files modified:** 10
+
+## Accomplishments
+- ItemCard, CandidateCard, CandidateListItem all navigate to detail pages on click using TanStack Router useNavigate
+- CatalogSearchOverlay cards navigate to /global-items/:id (closing overlay first), with Add button using stopPropagation
+- Slide-out panel JSX and imports completely removed from __root.tsx
+- UIStore cleaned of 11 panel-related properties/actions while preserving all dialog, FAB, and catalog search state
+- All downstream references (CollectionView, ItemForm, CandidateForm, thread page) updated to remove dead panel references
+
+## Task Commits
+
+Each task was committed atomically:
+
+1. **Task 1: Rewire card click handlers to navigate to detail pages** - `1f79c5c` (feat)
+2. **Task 2: Remove slide-out panels from root layout and clean UIStore** - `4c79735` (feat)
+
+## Files Created/Modified
+- `src/client/components/ItemCard.tsx` - Navigate to /items/$itemId instead of openEditPanel
+- `src/client/components/CandidateCard.tsx` - Navigate to /threads/$threadId/candidates/$candidateId
+- `src/client/components/CandidateListItem.tsx` - Navigate to candidate detail page
+- `src/client/components/CatalogSearchOverlay.tsx` - Card click navigates to /global-items/$globalItemId
+- `src/client/routes/__root.tsx` - Removed both SlideOutPanel instances and all panel state reads
+- `src/client/stores/uiStore.ts` - Removed panel state/actions, kept dialogs and other state
+- `src/client/components/CollectionView.tsx` - Empty state button uses catalog search instead of add panel
+- `src/client/components/ItemForm.tsx` - Replaced closePanel with onClose prop
+- `src/client/components/CandidateForm.tsx` - Replaced closeCandidatePanel with onClose prop, removed UIStore import
+- `src/client/routes/threads/$threadId.tsx` - Replaced openCandidateAddPanel with local state
+
+## Decisions Made
+- Preserved currentThreadId derivation block in __root.tsx because CandidateDeleteDialog depends on it (checker flagged this)
+- CollectionView empty state Add button rewired to open catalog search overlay rather than the removed add panel
+- ItemForm and CandidateForm given onClose prop to decouple from UIStore panel actions (forms still exist on disk per plan requirement)
+
+## Deviations from Plan
+
+### Auto-fixed Issues
+
+**1. [Rule 3 - Blocking] Updated CollectionView.tsx to remove dead openAddPanel reference**
+- **Found during:** Task 2 (panel cleanup)
+- **Issue:** CollectionView referenced openAddPanel which was removed from UIStore
+- **Fix:** Replaced with openCatalogSearch("collection") to maintain "Add Item" functionality via catalog
+- **Files modified:** src/client/components/CollectionView.tsx
+- **Verification:** grep confirms no dead references remain
+- **Committed in:** 4c79735 (Task 2 commit)
+
+**2. [Rule 3 - Blocking] Updated threads/$threadId.tsx to remove dead openCandidateAddPanel reference**
+- **Found during:** Task 2 (panel cleanup)
+- **Issue:** Thread page referenced openCandidateAddPanel which was removed from UIStore
+- **Fix:** Replaced with local useState (Plan 02 already restructured this file with a proper modal)
+- **Files modified:** src/client/routes/threads/$threadId.tsx
+- **Verification:** grep confirms no dead references remain
+- **Committed in:** 4c79735 (Task 2 commit)
+
+**3. [Rule 3 - Blocking] Updated ItemForm.tsx and CandidateForm.tsx to remove dead panel close references**
+- **Found during:** Task 2 (panel cleanup)
+- **Issue:** Forms referenced closePanel/closeCandidatePanel which were removed from UIStore
+- **Fix:** Added onClose prop to both forms, replaced store calls with onClose?.()
+- **Files modified:** src/client/components/ItemForm.tsx, src/client/components/CandidateForm.tsx
+- **Verification:** grep confirms no dead references remain
+- **Committed in:** 4c79735 (Task 2 commit)
+
+---
+
+**Total deviations:** 3 auto-fixed (3 blocking)
+**Impact on plan:** All auto-fixes necessary to prevent broken references after panel state removal. No scope creep.
+
+## Issues Encountered
+None
+
+## User Setup Required
+None - no external service configuration required.
+
+## Known Stubs
+None - all navigation targets exist (created by Plans 01 and 02), no placeholder data.
+
+## Next Phase Readiness
+- All cards navigate to detail pages, panel-to-page migration complete
+- Phase 21 complete: item detail pages, candidate detail pages, and navigation rewiring all done
+- Ready for Phase 22 (next milestone work)
+
+---
+*Phase: 21-item-catalog-detail-pages*
+*Completed: 2026-04-06*