chore: archive v2.2 User Experience Polish milestone

Phases 28-31 archived to milestones/v2.2-phases/
Requirements and roadmap snapshots archived to milestones/

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.planning/milestones/v2.2-phases/29-image-presentation/29-02-SUMMARY.md

@@ -0,0 +1,56 @@
+---
+phase: 29
+plan: 02
+subsystem: frontend
+tags: [components, image-rendering, ui]
+key-files:
+  created:
+    - src/client/components/GearImage.tsx
+  modified:
+    - src/client/components/ItemCard.tsx
+    - src/client/components/GlobalItemCard.tsx
+    - src/client/components/CandidateCard.tsx
+    - src/client/components/CandidateListItem.tsx
+    - src/client/components/ImageUpload.tsx
+    - src/client/components/ComparisonTable.tsx
+    - src/client/components/CatalogSearchOverlay.tsx
+    - src/client/components/LinkToGlobalItem.tsx
+    - src/client/routes/items/$itemId.tsx
+    - src/client/routes/global-items/$globalItemId.tsx
+    - src/client/routes/global-items/index.tsx
+    - src/client/routes/threads/$threadId/candidates/$candidateId.tsx
+metrics:
+  tasks: 13
+  commits: 4
+  files-changed: 13
+---
+
+# Plan 29-02 Summary: GearImage Component + Surface Updates
+
+## What was built
+- Created `GearImage` shared component with three modes: contain (default), cover (tiny thumbnails), and crop (CSS transform)
+- Created `imageContainerBg()` helper for consistent dominant color backgrounds
+- Updated all 12 gear image surfaces to use GearImage
+- Default rendering now uses `object-contain` instead of `object-cover`
+- Parent containers use dominant color background for letterbox/pillarbox fill
+- LinkToGlobalItem uses `cover` mode for 32px thumbnails (intentional exception)
+
+## Commits
+
+| Task | Commit | Description |
+|------|--------|-------------|
+| 1 | 06d3984 | Create GearImage component |
+| 2-3 | 2865e65 | Update ItemCard and GlobalItemCard |
+| 4-5 | 05c0918 | Update CandidateCard and CandidateListItem |
+| 6-8 | 91846b5 | Update ComparisonTable, CatalogSearchOverlay, ImageUpload |
+| 9-13 | 66d9c41 | Update detail pages and LinkToGlobalItem |
+| lint | 9636033 | Lint fixes for formatting and unused parameter |
+
+## Deviations
+None.
+
+## Self-Check: PASSED
+- GearImage component exists: YES
+- object-cover removed from all gear surfaces: YES (only remains in GearImage internal, ProfileSection avatar, users avatar)
+- Build passes: YES
+- Lint passes: YES