fix(ui): native inputs/checkboxes, QR fallback, focus + report modal cleanup

- N23 RoomServerACL: raw text input -> folds Input; raw checkbox -> folds Checkbox
- N24 PolicyListViewer: raw room-id input -> folds Input (Critical variant on error)
- N25 ExportRoomHistory: raw <input type="date"> x2 -> folds Input
- N26 RoomShareInvite: QR <img> gets loading="lazy" + onError fallback card
  ("QR code unavailable") instead of a broken-image icon
- N27 GifPicker: FocusTrap returnFocusOnDeactivate:false (matches EmojiBoard)
- N76 Report modals: drop redundant Cancel button (dismiss via header x /
  click-outside, like MessageReportItem)
- N5 ReadReceiptAvatars: hover/focus moved to co-located css :hover/:focus-visible
  (removed JS onMouseEnter/Leave .style mutation)

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/app/components/GifPicker.tsx

@@ -103,6 +103,7 @@ export function GifPicker({ apiKey, onSelect, requestClose }: GifPickerProps) {
     <FocusTrap
       focusTrapOptions={{
         initialFocus: false,
+        returnFocusOnDeactivate: false,
         onDeactivate: requestClose,
         clickOutsideDeactivates: true,
         allowOutsideClick: true,