docs(03): create phase plan

Phase 03: Images
- 4 plan(s) in 3 wave(s)
- Wave 1: 03-01 (foundation)
- Wave 2: 03-02, 03-03 (parallel - upload + camera)
- Wave 3: 03-04 (integration + verification)
- Ready for execution

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

.planning/ROADMAP.md

@@ -68,12 +68,13 @@ Plans:
   3. User can view attached images inline with entry
   4. User can remove image attachments from an entry
   5. Images are stored on filesystem (not in database)
-**Plans**: TBD
+**Plans**: 4 plans
 
 Plans:
-- [ ] 03-01: TBD
-- [ ] 03-02: TBD
-- [ ] 03-03: TBD
+- [ ] 03-01-PLAN.md — Database schema, file storage, thumbnail generation, and API endpoints
+- [ ] 03-02-PLAN.md — File upload form action and ImageUpload component with drag-drop
+- [ ] 03-03-PLAN.md — CameraCapture component with getUserMedia and preview/confirm flow
+- [ ] 03-04-PLAN.md — EntryCard integration with gallery, lightbox, and delete functionality
 
 ### Phase 4: Tags & Organization
 **Goal**: Users can organize entries with tags and quick access features
@@ -136,7 +137,7 @@ Phases execute in numeric order: 1 -> 2 -> 3 -> 4 -> 5 -> 6
 |-------|----------------|--------|-----------|
 | 1. Foundation | 2/2 | Complete ✓ | 2026-01-29 |
 | 2. Core CRUD | 4/4 | Complete ✓ | 2026-01-29 |
-| 3. Images | 0/3 | Not started | - |
+| 3. Images | 0/4 | Ready | - |
 | 4. Tags & Organization | 0/3 | Not started | - |
 | 5. Search | 0/3 | Not started | - |
 | 6. Deployment | 0/2 | Not started | - |