Start from an outcome, then reveal every connector control when you need it.
Verify the detail panel's loading, content, and capability-aware preview states.
Steps
Open readme.md in the file list.
Watch the preview resolve below the file glyph.
Confirm the detail panel never claims that preview is unsupported.
Expected result
The in-memory Markdown content appears with one coherent preview status.
Data
Everything runs on an in-memory mock connector — drop whole folders, paste screenshots (Cmd+V), watch the concurrency queue and quota meter, rename, move, and delete freely.