Update icons, screenshots, and UX improvements

- Refactor icon picker to use full Ionicons set dynamically
- Add date sort toggle to My Answers screen
- Fix match deduplication and show total count on home
- Clear stale data when switching chats
- Update app store screenshots
- Bump build number to 25

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

apps/mobile/src/store/index.ts

@@ -5,4 +5,4 @@ export { usePacksStore } from "./packsStore";
 export { useMessageStore } from "./messageStore";
 export { useSubscriptionStore } from "./subscriptionStore";
 export { useResponsesStore, groupResponses } from "./responsesStore";
-export type { ResponseWithQuestion, UpdateResponseResult, GroupByOption } from "./responsesStore";
+export type { ResponseWithQuestion, UpdateResponseResult, GroupByOption, DateSortOrder } from "./responsesStore";