- ProjectDataSource<RealEngine> reads the real bin tree (roots/
children via the facade folder/footage enumeration)
- AppEngine::import_footage implemented (facade project_import_footage,
last_error surfaced); double-click opens in the source viewer
- dragging files onto the browser imports them (also fixes a real gpui
bug: ExternalPaths arrives as the bare type, not Arc-wrapped, so
drops never fired)
- tests: real-engine import->browser listing, widget drop routing,
facade folder enumeration failure matrix
Mike-Solar
693e2df5eb