After the chat refactoring moved state management to @multica/hooks,
the Zustand stores (useConnectionStore, useMessagesStore, useAutoConnect)
are no longer imported by any application code. This removes them along
with their unused dependencies (zustand, uuid, react).
- Delete connection-store.ts, messages.ts, use-auto-connect.ts
- Extract Message/ToolStatus types into types.ts (preserves UI imports)
- Remove saveConnection/loadConnection/clearConnection from connection.ts
- Drop zustand, uuid, react deps from package.json
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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