---
phase: 21-item-catalog-detail-pages
plan: 01
subsystem: ui
tags: [react, tanstack-router, detail-page, edit-mode, collection]

requires:
  - phase: 20-fab-full-screen-catalog-search
    provides: "Global item hooks, catalog search overlay, FAB menu"
provides:
  - "Private item detail page at /items/:id with edit mode toggle"
  - "Enhanced catalog detail page at /global-items/:id with Add to Collection stub"
affects: [21-02, 21-03, phase-22]

tech-stack:
  added: []
  patterns:
    - "Detail page edit mode via local useState toggle"
    - "Form state initialized from item data on edit enter"

key-files:
  created:
    - src/client/routes/items/$itemId.tsx
  modified:
    - src/client/routes/global-items/$globalItemId.tsx

key-decisions:
  - "Used type assertion for imageUrl on item data (API enriches but TS interface lacks field)"
  - "Edit mode uses local form state initialized on toggle, not controlled by UIStore"

patterns-established:
  - "Detail page pattern: hero image, name, spec badges, content sections, metadata footer"
  - "Edit mode pattern: enterEditMode initializes form from data, Save calls mutation with onSuccess exit"

requirements-completed: [DETAIL-01, DETAIL-02, DETAIL-03]

duration: 4min
completed: 2026-04-06
---

# Phase 21 Plan 01: Detail Pages Summary

**Private item detail page with edit mode toggle at /items/:id, and enhanced catalog detail page with Add to Collection stub button**

## Performance

- **Duration:** 4 min
- **Started:** 2026-04-06T12:57:54Z
- **Completed:** 2026-04-06T13:02:13Z
- **Tasks:** 2
- **Files modified:** 2

## Accomplishments
- Full item detail page at `/items/:id` with hero image (or category icon placeholder), name, weight/price/category badges, notes, product link, and metadata
- Edit mode toggle: read-only gallery view by default, inline editable fields with Save/Cancel when Edit clicked
- Catalog detail page enhanced with image placeholder when no image, and "Add to Collection" stub button

## Task Commits

Each task was committed atomically:

1. **Task 1: Create private item detail page with edit mode toggle** - `3228bca` (feat)
2. **Task 2: Enhance catalog detail page with Add to Collection button** - `408025b` (feat)

## Files Created/Modified
- `src/client/routes/items/$itemId.tsx` - Private item detail page with edit mode, duplicate, delete, back nav
- `src/client/routes/global-items/$globalItemId.tsx` - Enhanced with image placeholder and Add to Collection stub button

## Decisions Made
- Used type assertion to access `imageUrl` field that API enriches via `withImageUrl` but isn't in the TypeScript `ItemWithCategory` interface
- Edit mode managed via local `useState<boolean>` rather than UIStore, keeping state scoped to the page

## Deviations from Plan

None - plan executed exactly as written.

## Known Stubs

| File | Line | Stub | Reason |
|------|------|------|--------|
| `src/client/routes/global-items/$globalItemId.tsx` | 133 | "Add to Collection" button logs to console | Actual add-from-catalog flow wired in Phase 22 (per D-10) |

## Issues Encountered
None

## User Setup Required
None - no external service configuration required.

## Next Phase Readiness
- Both detail pages exist and are ready for Plan 03 to rewire card click handlers to navigate here
- Plan 02 (candidate detail page) can proceed independently
- Phase 22 will wire the Add to Collection button to actual functionality

---
*Phase: 21-item-catalog-detail-pages*
*Completed: 2026-04-06*
