docs(03-02): complete file upload plan

Tasks completed: 3/3
- Add uploadImage form action with thumbnail generation
- Create ImageUpload component with drag-drop
- Integrate upload into QuickCapture

SUMMARY: .planning/phases/03-images/03-02-SUMMARY.md

.planning/STATE.md

@@ -32,11 +32,9 @@ Progress: [████████░░] 75%
 | 03-images | 3 | 6 min | 2 min |
 
 **Recent Trend:**
-- Last 5 plans: 02-03 (3 min), 02-04 (5 min), 03-01 (4 min), 03-02 (~0 min*), 03-03 (2 min)
+- Last 5 plans: 02-03 (3 min), 02-04 (5 min), 03-01 (4 min), 03-02 (2 min), 03-03 (2 min)
 - Trend: Stable
 
-*03-02 executed outside this session
-
 *Updated after each plan completion*
 
 ## Accumulated Context
@@ -63,6 +61,9 @@ Recent decisions affecting current work:
 - Thumbnails always JPEG regardless of original format (03-01)
 - EXIF rotation via sharp.rotate() before resize (03-01)
 - Immutable cache headers for images (03-01)
+- Fetch to form action for programmatic upload control (03-02)
+- Optimistic preview using URL.createObjectURL (03-02)
+- Create entry first, then upload image with entryId (03-02)
 - JPEG at 0.9 quality for camera captures (03-03)
 - Default back camera for mobile paper note photos (03-03)
 - Stop camera stream after capture to save battery (03-03)
@@ -83,4 +84,4 @@ Resume file: None
 
 ---
 *State initialized: 2026-01-29*
-*Last updated: 2026-01-29 after 03-03 completion*
+*Last updated: 2026-01-29 after 03-02 completion (all phase 03 plans complete)*