fix(privacy): "Remove Photo Metadata" also covers emoji/sticker packs and badges (#332)

Custom emoji and sticker images, pack avatars and power-level badge
images were uploaded with their EXIF intact (GPS location, timestamp),
although they are published to every member of the room or space. Route
those three pickers through a new useStrippedFilePicker, which applies
the same stripImageMetadata as attachments and avatars.

Fixes #332

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017PCb59uY3UKqDqt7B6hzd5

src/app/components/image-pack-view/PackMeta.tsx

@@ -19,7 +19,7 @@ import { nameInitials } from '../../utils/common';
 import { BreakWord } from '../../styles/Text.css';
 import { LINKIFY_OPTS } from '../../plugins/react-custom-html-parser';
 import { ContainerColor } from '../../styles/ContainerColor.css';
-import { useFilePicker } from '../../hooks/useFilePicker';
+import { useStrippedFilePicker } from '../../hooks/useStrippedFilePicker';
 import { useObjectURL } from '../../hooks/useObjectURL';
 import { createUploadAtom, UploadSuccess } from '../../state/upload';
 import { CompactUploadCardRenderer } from '../upload-card';
@@ -111,7 +111,7 @@ export function ImagePackProfileEdit({ meta, onCancel, onSave }: ImagePackProfil
     return undefined;
   }, [imageFile]);
 
-  const pickFile = useFilePicker(setImageFile, false);
+  const pickFile = useStrippedFilePicker(setImageFile, false);
 
   const handleRemoveUpload = useCallback(() => {
     setImageFile(undefined);