v0.26.1

Patch Changes

• Remove the unused platform-owned conversation, directory, and inbox stack,
  including its hooks, schemas, routes, bindings, Durable Object class, and
  dead client platform context/WebSocket helpers.

  Make the bundled messaging feature honest and smaller by supporting public
  channels only, confirming membership writes, and removing duplicate multi-chat,
  DM, private-group, invitation, and unread-state implementations. Remove the
  overbuilt sidebar feature and reduce search to a controlled inline component
  plus local ranking.

  Make generated Playwright runs own their test server and refuse busy ports
  (port_in_use, after a bounded grace for a server still shutting down), gate
  suite readiness on the auth plane, settle screenshots before capture (with
  opt-in --wait-for-selector), add the router hydration fallback, bound deploy
  JSON progress, and label app usage as account-wide.

  Migration for existing apps: removed deepspace exports include
  useConversation, the client/directory hooks (useConversations,
  useCommunities, usePosts), the client platform context
  (PlatformProvider, usePlatformWS), ChannelInvitation,
  CHANNEL_INVITATIONS_SCHEMA, CONVERSATION_SCHEMAS, VOTING_SCHEMAS,
  DIRECTORY_SCHEMAS, and the messaging display utils
  (formatMessageTime, groupReactionsForMessage, parseMessageMetadata, …).
  Apps that installed the pre-0.27 messaging feature should delete the copied
  chat-multi/ components, ChatMultiPage, and useMultiChannel (they import
  the removed exports), and drop channel-invitations from their schemas. The
  bundled channels schema now admits only type: 'public': existing
  private/dm rows keep reading but fail validation on writes that echo the
  old value — delete those rows or keep an app-local schema that still declares
  them.