- Extract _resolve_message_context() to deduplicate ~40 lines of
mention/thread/DM gating logic between text and media handlers
- Move mautrix.types imports to module level (16 scattered local
imports consolidated)
- Parse mention/thread env vars once in __init__ instead of per-message
- Cache _is_bot_mentioned() result instead of calling 3x per event
- Consolidate send_emote/send_notice into shared _send_simple_message()
- Use _is_dm_room() in get_chat_info() instead of inline duplication
- Add _CRYPTO_PICKLE_PATH constant (was duplicated in 2 locations)
- Fix fragile event_ts extraction (double getattr, None safety)
- Clean up leaked aiohttp session on auth failure paths
- Remove redundant trailing _track_thread() calls
bc8b93812c