refactor: strip AI pipeline to binary photo/other classifier

Drops face recognition, OCR, object detection, and semantic embeddings.
The sole remaining vision task is a CLIP-based binary classifier
(photography vs other); photos in "other" get needs_review=true so
screenshots, documents, memes and scans can be triaged from a new
filter pill in the UI.

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

frontend/src/hooks/usePhotosQuery.ts

@@ -52,6 +52,7 @@ export function usePhotosQuery() {
   const folderId = useFilterStore((s) => s.folderId)
   const tagIds = useFilterStore((s) => s.tagIds)
   const duplicates = useFilterStore((s) => s.duplicates)
+  const needsReview = useFilterStore((s) => s.needsReview)
   const groupBy = useFilterStore((s) => s.groupBy)
   const sortBy = useFilterStore((s) => s.sortBy)
   const sortOrder = useFilterStore((s) => s.sortOrder)
@@ -71,11 +72,12 @@ export function usePhotosQuery() {
         folderId,
         tagIds,
         duplicates,
+        needsReview,
         groupBy,
         sortBy,
         sortOrder,
       }),
-    [q, dateFrom, dateTo, mediaTypes, ratingMin, ratingMax, colorLabel, flag, heapId, folderId, tagIds, duplicates, groupBy, sortBy, sortOrder]
+    [q, dateFrom, dateTo, mediaTypes, ratingMin, ratingMax, colorLabel, flag, heapId, folderId, tagIds, duplicates, needsReview, groupBy, sortBy, sortOrder]
   )
 
   const queryClient = useQueryClient()