- Implemented aggressive room-wide background caching engine in LauncherBackgroundSync.svelte.
- Added inc_file_li and inc_all_file_li support to Event and Event Location object loaders for total room coverage.
- Switched to proven V1 download path (/hosted_file/) to resolve V3 CRUD binary delivery issues.
- Optimized Electron bridge with download locking and flat-hash storage matching legacy 'perfect' logic.
- Standardized all Electron IPC methods and parameters to snake_case.
- Added visual sync progress indicator for room caching status.