feat(group_chat): combined chats list with unread badges and live-update recovery

[harshal-2304]

• Chats list — chat icon with green unread dot on the Connect app bar, plus a /chats screen: avatar, name, day label, Sender: message preview, unread badge. Group rooms only, sorted by recency.
• Live-update recovery — a foreground chat push for the open thread triggers a refetch, and replaces the socket if it turns up a message the socket never delivered. Fixes messages only appearing after leaving and re-entering the room.
• Mark read on send — sending moves last_read_at, so you no longer see your own message badged as unread after exiting.

[greptile-apps]

Greptile Summary

The PR adds a group-chat inbox with unread indicators and foreground-push recovery for open threads, plus marks sent messages as read.

• Adds the /chats route, localized empty states, room tiles, sorting, previews, unread badges, and Connect app-bar entry.
• Adds paginated room-list state refreshed by lifecycle and foreground push events.
• Adds foreground-push thread refetching and socket replacement when the refreshed thread appears to contain missed activity.
• Updates the send path to advance room read state.

Confidence Score: 0/5

The PR is not safe to merge because group chats can remain unreachable, concurrent refreshes can corrupt pagination, and foreground-push recovery can make incorrect socket replacement decisions.

The previously reported pagination defects remain in the current implementation: filtered empty or short pages have no automatic continuation path, refresh can merge stale load-more data against reset offsets, and superseded requests can strand loading state. The socket recovery path also still infers delivery from a generic newest-message change, allowing healthy connections to be replaced and degraded connections to be retained.

Files Needing Attention: lib/features/group_chat/presentation/providers/chat_rooms_providers.dart, lib/features/group_chat/presentation/screens/chats_screen.dart, lib/features/group_chat/presentation/screens/group_chat_screen.dart

Important Files Changed

Filename	Overview
lib/features/group_chat/presentation/providers/chat_rooms_providers.dart	Adds shared paginated group-room state, but the previously reported filtered-page reachability and refresh/load-more race defects remain outstanding.
lib/features/group_chat/presentation/screens/group_chat_screen.dart	Adds push-backed thread recovery and mark-read-on-send, but the previously reported socket-health classification defects remain outstanding.
lib/features/group_chat/presentation/screens/chats_screen.dart	Adds the chats list and refresh UI, while its scroll-only pagination trigger contributes to the outstanding inability to reach group rooms behind filtered pages.
lib/features/group_chat/presentation/utils/chat_rooms_list.dart	Adds group filtering, ordering, unread, push-targeting, and preview helpers; its message-identity-free push targeting feeds the outstanding recovery ambiguity.
lib/features/connect/presentation/screens/connect_screen.dart	Adds the chats action and unread dot backed by the shared room provider.
lib/core/config/router/app_router.dart	Registers the new top-level chats screen route.
lib/core/config/router/app_routes.dart	Defines the /chats route constant.
lib/features/group_chat/presentation/widgets/chat_room_tile.dart	Renders group identity, date, message preview, avatar, and unread count for each chat row.
test/features/group_chat/presentation/utils/chat_rooms_list_test.dart	Covers the room-list utility behavior added by the PR.

Sequence Diagram

sequenceDiagram
  participant User
  participant Connect
  participant Rooms as Chat rooms provider
  participant API
  participant Thread as Group chat screen
  participant Push
  participant Socket
  User->>Connect: Open community hub
  Connect->>Rooms: Watch rooms and unread state
  Rooms->>API: List chat rooms
  API-->>Rooms: Mixed paginated rooms
  Rooms-->>Connect: Group rooms and unread dot
  User->>Thread: Open group chat
  Socket-->>Thread: Live chat events
  Push-->>Thread: Foreground chat push
  Thread->>API: Refresh current thread
  Thread->>Socket: Replace connection when recovery check indicates missed activity

Loading

_{Reviews (4): Last reviewed commit: "fix(group_chat): mark room as read immed..." | Re-trigger Greptile}

[greptile-apps]

Filtered pagination stops early

If the server places the first group room after more than five consecutive direct-message-only pages, _pagePastDirectRooms exhausts this fixed budget while hasMore remains true. The empty screen has no scroll-driven loadMore path, so existing group chats and their unread indicator remain hidden.

Knowledge Base Used: Community connection and AI assistance

Prompt To Fix With AI

This is a comment left during a code review.
Path: lib/features/group_chat/presentation/providers/chat_rooms_providers.dart
Line: 89-90

Comment:
**Filtered pagination stops early**

If the server places the first group room after more than five consecutive direct-message-only pages, `_pagePastDirectRooms` exhausts this fixed budget while `hasMore` remains true. The empty screen has no scroll-driven `loadMore` path, so existing group chats and their unread indicator remain hidden.

**Knowledge Base Used:** [Community connection and AI assistance](https://app.greptile.com/webuddhist/-/custom-context/knowledge-base/openpecha/webuddhist-app/-/docs/community-connect-and-ai.md)

---

For each issue above, determine whether it is valid and should be fixed. If so, fix it directly.

[greptile-apps]

Retry strands pagination state

If the user retries while the automatic direct-room walk has a loadMore request in flight, loadInitial advances the generation without resetting isLoadingMore. The superseded request then returns without clearing that flag, permanently blocking later pagination and leaving deeper group rooms unreachable.

Knowledge Base Used: Community connection and AI assistance

Prompt To Fix With AI

This is a comment left during a code review.
Path: lib/features/group_chat/presentation/providers/chat_rooms_providers.dart
Line: 227-232

Comment:
**Retry strands pagination state**

If the user retries while the automatic direct-room walk has a `loadMore` request in flight, `loadInitial` advances the generation without resetting `isLoadingMore`. The superseded request then returns without clearing that flag, permanently blocking later pagination and leaving deeper group rooms unreachable.

**Knowledge Base Used:** [Community connection and AI assistance](https://app.greptile.com/webuddhist/-/custom-context/knowledge-base/openpecha/webuddhist-app/-/docs/community-connect-and-ai.md)

---

For each issue above, determine whether it is valid and should be fixed. If so, fix it directly.