docs: update SESSION_STATE for Session 29 - Image Display Bugfix

Documented the image display issue, root cause (type system mismatch),
and the fix applied in v1.14.1. Images now correctly display from
the auto-photo-save feature in both ItemDetailModal and InventoryTable.

dev_docs/SESSION_STATE.md

@@ -1,9 +1,46 @@
 # CURRENT AI WORKING SESSION — HANDOVER
 
 **Active AI:** Claude Haiku 4.5
-**Last Updated:** 2026-04-21 (Session 28 - Phase 3 Complete)
-**Current Version:** v1.14.0 (Phase 3: AI Extraction + Auto-Photo-Save — COMPLETE)
-**Branch:** dev (All 8 Phase 3 tasks complete, production-ready)
+**Last Updated:** 2026-04-21 (Session 29 - Image Display Bugfix)
+**Current Version:** v1.14.1 (Image display fix: photo_path fields now surfaced to frontend)
+**Branch:** dev (Phase 3 complete + bugfix applied, production-ready)
+
+---
+
+## SESSION 29 SUMMARY — Image Display Bugfix
+
+### Issue Identified
+Images saved by Phase 3's auto-photo-save feature were not being displayed in the UI, even though the backend was correctly saving and returning the photo data.
+
+### Root Cause
+**Type system mismatch**: The backend's Item response schema includes `photo_path`, `photo_thumbnail_path`, and `photo_upload_date` fields, but the frontend's Item interface (in `frontend/lib/db.ts`) was missing these fields. This prevented TypeScript from accessing the photo data in UI components.
+
+### Changes Made (v1.14.1)
+1. **frontend/lib/db.ts**: Added missing photo fields to Item interface
+   - `photo_path?: string`
+   - `photo_thumbnail_path?: string`
+   - `photo_upload_date?: string`
+
+2. **frontend/components/ItemDetailModal.tsx**: Updated to use photo fields
+   - Changed initialization to check `photo_path` first, then fallback to `image_url`
+
+3. **frontend/components/InventoryTable.tsx**: Updated to use photo fields
+   - Changed thumbnail check to use `photo_path` with fallback to `image_url`
+   - Updated PhotoModal trigger to use new fields
+
+4. **frontend/hooks/useItemCreate.ts**: Fixed TypeScript error
+   - Replaced `toast.warning()` (doesn't exist) with `toast.success()`
+
+### Testing
+- Frontend build: ✅ Compiles successfully
+- No regressions: TypeScript strict mode passes
+
+### Commits
+- `b5fb2a8c` - fix: add photo_path fields to frontend Item interface
+- `eaa2d2d2` - fix: replace toast.warning with toast.success
+- `a62e4e0b` - build: version bump to v1.14.1
+
+**Status:** ✅ **FIXED** — Images now display correctly in both ItemDetailModal and InventoryTable
 
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