Client accept/reject votes with keyboard-driven culling

- verdicts table (per link, like ratings), PUT verdict endpoint, typed Verdict enum
- share page: thumbs up/down, verdict filter with counts, view-scoped selection bar
- lightbox: per-page shortcut table (P/X/U, 1-5/0, S), ? help overlay, action
  toast when a keyboard vote auto-advances
- shared useLightbox hook; single keydown subscription reading live state via ref
- album view: per-link thumbs and vote counts; share list shows accept/reject totals
- feedback queries deduped and run concurrently; verdict counts in one scan

frontend/src/useSelection.js

@@ -23,7 +23,10 @@ export default function useSelection(photos) {
       return next
     })
 
-  const selectAll = () => setSelected(new Set(photos.map((p) => p.id)))
+  // Adds `list` (the caller's currently visible photos) to the selection —
+  // additive, so selecting all of one filtered view keeps picks from another.
+  const selectAll = (list) =>
+    setSelected((prev) => new Set([...prev, ...list.map((p) => p.id)]))
   const clear = () => setSelected(new Set())
   const selectedBytes = photos.reduce((sum, p) => sum + (selected.has(p.id) ? p.size_bytes : 0), 0)
   const totalBytes = photos.reduce((sum, p) => sum + p.size_bytes, 0)