feat: pass extracted image and image_processing metadata to item creation

- Updated confirmSingleItem() to include extractedImageBlob and imageProcessing
- Updated confirmAllItems() to pass image data for bulk item creation
- Each extracted item now carries its own image_processing metadata
- All items in bulk creation share the same extracted image blob
- Added 12 comprehensive tests verifying data is passed correctly
- All 465 frontend tests passing, zero regressions

.claude/settings.local.json

@@ -92,7 +92,9 @@
       "Bash(grep -E \"\\\\.\\(tsx|ts|jsx|js\\)$\")",
       "Bash(pkill -9 -f uvicorn)",
       "Bash(grep -E \"\\\\.\\(py|txt\\)$\")",
-      "Bash(npx vitest *)"
+      "Bash(npx vitest *)",
+      "Bash(sed -i 's/jest\\\\.fn\\(\\)/vi.fn\\(\\)/g' tests/hooks/useAIExtraction.test.ts)",
+      "Bash(sed -i 's/as jest\\\\.Mock/as any/g' tests/hooks/useAIExtraction.test.ts)"
     ]
   }
 }