Replace the last stale screenshot with a live recording

[revtex]

record.png was the one image #49 deliberately left alone. Replacing it honestly needed Spotify playing into a real recording — the cover art, the moving level meter and the running clock are the whole point of the shot, and FakeSpotify only changes a window title, so none of it can be staged. It stayed at four tabs while the app has five, in the first image anyone sees.

The replacement is a real session, captured by @revtex.

What it fixes

• Five tabs. The nav strip now matches the app, consistently across all four images.
• It demonstrates what it used to assert. A track finished earlier in the session sits in the list below with its length and the button that opens the folder it landed in — the paragraph below the image describes exactly this, and previously nothing in the picture showed it.
• The Save path is the worked example. Gregory Alan Isakov\(2009) This Empty Northern Hemisphere\12 If I Go, I'm Goin.mp3 is what {artist}\({year}) {album}\{track:00} {title} produces, which is the template the Advanced section points at when it says "the Save path in the first screenshot".

Captions

Both the alt text and the italic line under the image said eighteen seconds, because the old shot did. The clock reads twelve now, so both say twelve. The italic line also picks up the length and the folder button, since the shot finally shows them.

Image handling

Two pixels trimmed from each edge, where the window's transparent margin had picked up what was behind it — measured, not guessed: the outer two rows and columns read 24–128 against the window's own 12, and after the trim every edge matches the profile of the three images captured over a black backdrop in #49. Nothing inside the window was touched. Final size 1532x1046.

Verification

• .\build.ps1 -VerifyFormat — clean.
• No user name or absolute path appears in the image; both file paths in it are relative to the recordings folder.

no-changelog: nothing about the shipped application changed.