Auto-join space rooms when accepting space invites

[KallynGowdy]

Description

When a user accepts an invite to a space, automatically join all joinable rooms within that space in the background. This improves the user experience by populating the space with its child rooms without requiring manual joins.

Changes:

• Added joinSpaceRooms.ts utility module that:

  • Fetches the space hierarchy using paginated requests
  • Filters out already-joined rooms, the space itself, and unjoinable rooms (invite/knock/private join rules)
  • Joins remaining rooms with rate limiting (3 concurrent requests) using advertised via servers
  • Gracefully handles failures without throwing (space join already succeeded)

• Updated Invites.tsx to call joinSpaceRooms() after accepting a space invite

• Updated CommunityList.tsx to call joinSpaceRooms() after joining a community space

• Added comprehensive unit tests for getSpaceRoomsToJoin() covering:

  • Correct filtering and ordering of rooms
  • Via server extraction from space.child events
  • Deduplication and join state handling

Test Plan:

Added unit tests in joinSpaceRooms.test.ts covering the room filtering and via server logic. Run npm test to verify.

Fixes #

https://claude.ai/code/session_01SW3Ebb16smU9Xmr7hRTgg2