gui: raise the approval card and drop the header path

The window title kept the filesystem path as a permanent subtitle.
Show the workspace and its agents instead, and keep the path on hover.

The approval bar was a flat tint with three equal answers. It is now
a card (inset hairline plus a shade drop that stays inside the pane)
and Allow once is the only suggested action.
acc6e36d00Lucenx9 committed on 10/3/2026, 2:03:04 PMparente55dcc9

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