feat: improve media viewer and push delivery stability

- add unified Android media viewer with swipe navigation, pinch-to-zoom and swipe-to-dismiss\n- move circle videos out of media gallery and surface them in voice/chat info flows\n- align web chat info handling for circle videos and media viewer exclusions\n- stabilize realtime and tablet chat shell updates already staged in this batch\n- fix Celery push delivery loop handling so FCM jobs can read tokens reliably in worker processes

android/app/src/main/res/values-ru/strings.xml

@@ -28,6 +28,9 @@
     <string name="chats_dialog_delete_selected_title">Удалить выбранные чаты</string>
     <string name="chats_dialog_delete_selected_body">Вы уверены, что хотите удалить выбранные чаты?</string>
     <string name="chats_dialog_delete_for_all">Удалить для всех (где доступно)</string>
+    <string name="tablet_chat_placeholder_title">Выберите чат</string>
+    <string name="tablet_chat_placeholder_body">Откройте диалог из левой колонки, и он появится здесь.</string>
+    <string name="tablet_chat_placeholder_hint">Открытый чат остаётся справа, а список слева всегда под рукой.</string>
 
     <string name="filter_all">Все</string>
     <string name="filter_people">Люди</string>
@@ -158,6 +161,7 @@
     <string name="chat_picker_tab_stickers">Стикеры</string>
     <string name="chat_playback_subtitle_voice">Голосовое сообщение • %1$s</string>
     <string name="chat_playback_subtitle_audio">Аудио • %1$s</string>
+    <string name="chat_playback_subtitle_circle">Видеокружок • %1$s</string>
     <string name="chat_user_fallback_with_id">Пользователь #%1$d</string>
     <string name="chat_member_role_with_id">%1$s • id %2$d</string>
     <string name="chat_member_id">id %1$d</string>
@@ -332,4 +336,5 @@
     <string name="account_info_recovery_codes_regenerated">Коды восстановления перегенерированы.</string>
     <string name="account_error_invalid_credentials">Неверные учетные данные.</string>
     <string name="account_error_unauthorized">Не авторизовано.</string>
+    <string name="chat_audio_strip_video_note">Видеокружок</string>
 </resources>

android/app/src/main/res/values/strings.xml

@@ -68,6 +68,9 @@
     <string name="chats_dialog_delete_selected_title">Delete selected chats</string>
     <string name="chats_dialog_delete_selected_body">Are you sure you want to delete selected chats?</string>
     <string name="chats_dialog_delete_for_all">Delete for all (where allowed)</string>
+    <string name="tablet_chat_placeholder_title">Choose a chat</string>
+    <string name="tablet_chat_placeholder_body">Select a conversation from the left column to open it here.</string>
+    <string name="tablet_chat_placeholder_hint">Your current chat stays open here while the list remains visible.</string>
 
     <string name="common_cancel">Cancel</string>
     <string name="common_confirm">Confirm</string>
@@ -158,6 +161,7 @@
     <string name="chat_picker_tab_stickers">Stickers</string>
     <string name="chat_playback_subtitle_voice">Voice message • %1$s</string>
     <string name="chat_playback_subtitle_audio">Audio • %1$s</string>
+    <string name="chat_playback_subtitle_circle">Video note • %1$s</string>
     <string name="chat_user_fallback_with_id">User #%1$d</string>
     <string name="chat_member_role_with_id">%1$s • id %2$d</string>
     <string name="chat_member_id">id %1$d</string>
@@ -332,4 +336,5 @@
     <string name="account_info_recovery_codes_regenerated">Recovery codes regenerated.</string>
     <string name="account_error_invalid_credentials">Invalid credentials.</string>
     <string name="account_error_unauthorized">Unauthorized.</string>
+    <string name="chat_audio_strip_video_note">Video note</string>
 </resources>