feat(gallery): white-ink default, 85ms base rate, ID badges as anchors

The split-flap's default skin becomes the white ink, listed first in the chip row, with the kit cream one click away. The base flap rate moves to 85ms, and the probe pins both defaults so a drive-by change can't silently flip them.

Every card's ID badge is now a real anchor to its own card, so a click deep-links the URL and a right-click copies it. One shared rule keeps the badge look.

The refactor sweep for extraction-readiness closes out: the flip duration and the ms clamp each live in one place, grid normalization is one helper shared by setText and the silent first paint (which now records itself as the last commanded grid, ending the null fallback), the state declarations sit above everything that references them (the same declared-later shape that caused a load crash earlier in the branch), and a stale two-skin comment caught up with the four skins. Behavior-preserving: all 79 probe checks stay green.

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