android: redesign chats search as fullscreen telegram-like flow

android/CHANGELOG.md

@@ -567,3 +567,13 @@
   - create group/channel -> open management panel,
   - saved -> open saved chat if present,
   - unsupported items show clear feedback instead of silent no-op.
+
+### Step 90 - Fullscreen chats search redesign (Telegram-like)
+- Reworked chats search mode into a fullscreen flow:
+  - top rounded search field with inline clear button,
+  - horizontal category chips (`Chats`, `Channels`, `Apps`, `Posts`),
+  - dedicated recent avatars row for the active category.
+- Added search-mode content states:
+  - empty query -> `Recent` list block (history-style chat rows),
+  - non-empty query -> local matches + `Global search` and `Messages` sections.
+- Kept search action in chats top bar; while search mode is active, app bar switches to back-navigation + empty title (content drives the page).