0469e9dab5
the scroll-triggered mini-preview from the last commit solved the wrong problem — it never showed in practice (images are generally as tall or taller than the short project texts, so the gap it needed never opened), and wasnt what was actually wanted: the existing left-column preview pane should keep responding to hover even once a file is locked, only reverting to the locked file once the mouse leaves the list. lock now only gates the is-selected styling, the ● locked indicator, and the click-to-navigate semantics on the portfolio index — not what the pane displays.