T3 Code Android v0.3.0

Reliable chat list and background run sync

• Fixes the shell list collapsing to one chat, or none, after the server's project-enrichment snapshot arrived. The Go core now merges project metadata without replacing the thread list.
• Adds optional background sync in Settings. A foreground service keeps the shell and active thread streams alive while the app is closed and updates the same SQLite history.
• Sends a completion notification with the thread title and the final assistant paragraph. Failed runs show the failure reason.
• Sends question and approval notifications when an agent is blocked, and opens the exact thread when tapped.
• Adds proper user-input answers in the app: single choice, multi-select, custom answers, dismiss, and the server's not-resumable state.
• Preserves user-input questions through the Go core so they are available offline and in cached projections.
• Bundles Go core v0.2.0 (shell snapshot merge, user-input forwarding, dismiss support).