T3 Code Android v0.2.12

Canonical on-device history

• Replaces per-thread JSON snapshots with a SQLite store keyed by environment and thread.
• Stores messages, turn items, requests and runs individually by stable id, so updates replace rows instead of duplicating the transcript.
• Reopens paint the saved timeline immediately and resume from the stored sequence, replaying only missed events.
• Falls back to full snapshots when the server cannot replay, and detects sequence gaps before advancing the resume cursor.
• Migrates the 0.2.11 JSON shell and thread snapshots lazily, so the first launch after upgrading still paints saved chats.
• Prunes to the newest 80 threads per environment and bounds expanded older history.