---
phase: 01-foundation-and-collection
plan: 03
subsystem: ui
tags: [react, tanstack-query, zustand, tailwind, combobox, slide-out-panel, crud-ui]

requires:
  - phase: 01-foundation-and-collection/01
    provides: Project scaffold, shared types, TanStack Router routes
  - phase: 01-foundation-and-collection/02
    provides: Item/category/totals API endpoints, image upload endpoint
provides:
  - Complete collection UI with card grid grouped by category
  - Slide-out panel for add/edit items with all fields
  - Category picker combobox with search and inline creation
  - Confirm delete dialog
  - Image upload component with preview
  - Sticky totals bar with global weight/cost/count
  - TanStack Query hooks for items, categories, and totals
  - Zustand UI store for panel and dialog state
  - API fetch wrapper with error handling
affects: [01-04]

tech-stack:
  added: []
  patterns: [tanstack-query-hooks, zustand-ui-store, fetch-wrapper, combobox-aria, slide-out-panel]

key-files:
  created:
    - src/client/lib/api.ts
    - src/client/lib/formatters.ts
    - src/client/hooks/useItems.ts
    - src/client/hooks/useCategories.ts
    - src/client/hooks/useTotals.ts
    - src/client/stores/uiStore.ts
    - src/client/components/TotalsBar.tsx
    - src/client/components/CategoryHeader.tsx
    - src/client/components/ItemCard.tsx
    - src/client/components/ConfirmDialog.tsx
    - src/client/components/ImageUpload.tsx
    - src/client/components/CategoryPicker.tsx
    - src/client/components/SlideOutPanel.tsx
    - src/client/components/ItemForm.tsx
  modified:
    - src/client/routes/__root.tsx
    - src/client/routes/index.tsx

key-decisions:
  - "ItemForm converts dollar input to cents for API (display dollars, store cents)"
  - "CategoryPicker uses native ARIA combobox pattern with keyboard navigation"
  - "Empty state encourages adding first item with prominent CTA button"

patterns-established:
  - "API wrapper: all fetch calls go through apiGet/apiPost/apiPut/apiDelete/apiUpload in lib/api.ts"
  - "Query hooks: each data domain has a hook file with query + mutation hooks that handle cache invalidation"
  - "UI store: Zustand store manages panel mode, editing item ID, and confirm dialog state"
  - "Component composition: Root layout owns panel/dialog/FAB, collection page owns grid and grouping"

requirements-completed: [COLL-01, COLL-02, COLL-03, COLL-04]

duration: 3min
completed: 2026-03-14
---

# Phase 1 Plan 03: Frontend Collection UI Summary

**Card grid collection view with slide-out CRUD panel, category picker combobox, confirm delete, image upload, and sticky totals bar**

## Performance

- **Duration:** 3 min
- **Started:** 2026-03-14T21:43:16Z
- **Completed:** 2026-03-14T21:46:30Z
- **Tasks:** 2
- **Files modified:** 16

## Accomplishments

- Complete gear collection UI with items displayed as cards grouped by category
- Slide-out panel for add/edit with all item fields including image upload and category picker
- Category management via inline combobox creation and header edit/delete actions
- Sticky totals bar showing global item count, weight, and cost
- Delete confirmation dialog preventing accidental deletions
- Loading skeleton and empty state with onboarding CTA

## Task Commits

Each task was committed atomically:

1. **Task 1: Data hooks, utilities, UI store, and foundational components** - `b099a47` (feat)
2. **Task 2: Slide-out panel, item form, category picker, and collection page** - `12fd14f` (feat)

## Files Created/Modified

- `src/client/lib/api.ts` - Fetch wrapper with error handling and multipart upload
- `src/client/lib/formatters.ts` - Weight (grams) and price (cents to dollars) formatters
- `src/client/hooks/useItems.ts` - TanStack Query hooks for item CRUD with cache invalidation
- `src/client/hooks/useCategories.ts` - TanStack Query hooks for category CRUD
- `src/client/hooks/useTotals.ts` - TanStack Query hook for computed totals
- `src/client/stores/uiStore.ts` - Zustand store for panel mode and confirm dialog state
- `src/client/components/TotalsBar.tsx` - Sticky bar with global item count, weight, cost
- `src/client/components/CategoryHeader.tsx` - Category group header with subtotals and edit/delete
- `src/client/components/ItemCard.tsx` - Item card with image, name, and tag chips
- `src/client/components/ConfirmDialog.tsx` - Modal delete confirmation with destructive action
- `src/client/components/ImageUpload.tsx` - File upload with type/size validation and preview
- `src/client/components/CategoryPicker.tsx` - ARIA combobox with search, select, and inline create
- `src/client/components/SlideOutPanel.tsx` - Right slide-out panel with backdrop and animation
- `src/client/components/ItemForm.tsx` - Full item form with validation and dollar-to-cents conversion
- `src/client/routes/__root.tsx` - Root layout with TotalsBar, panel, dialog, and floating add button
- `src/client/routes/index.tsx` - Collection page with category-grouped card grid and empty state

## Decisions Made

- ItemForm converts dollar input to cents before sending to API (user sees $12.34, API receives 1234)
- CategoryPicker implements native ARIA combobox pattern with arrow key navigation and escape to close
- Empty collection state shows a friendly message with prominent "Add your first item" button

## Deviations from Plan

None - plan executed exactly as written.

## Issues Encountered

None.

## User Setup Required

None - no external service configuration required.

## Next Phase Readiness

- Complete collection UI ready for end-to-end testing with backend
- All CRUD operations wire through to Plan 02's API endpoints
- Ready for Plan 01-04 (onboarding wizard)

## Self-Check: PASSED

All 16 files verified present. Both task commits verified in git log (`b099a47`, `12fd14f`).

---
*Phase: 01-foundation-and-collection*
*Completed: 2026-03-14*
