feat(gallery): bring the 12 waybar-bound builders to the extraction barHEADmain

Each builder now carries a contract comment in the splitFlap shape (opts, handle, where its CSS lives). I prefixed every batch-owned class with dupre- so page chrome can't collide with instrument internals. The audit's C1 moves to 14/111, the .txt collision is gone, and .on clears as its owners' batches land.

jewels also gets a real handle. Its state lived only in classList/--jc, so nothing could read or drive the lamps (a dead end for the waybar port). I moved state into the builder, made the DOM a paint of it, and added get/set.

lampRow and outputWell consume the shared lamp class, so they map their state fragments to the prefixed names internally. Their opts APIs are unchanged.

audit-extraction.mjs is the report-only grader for the bar (contract comments, page-styled internals, page reach-ins). It gates nothing until the sweep reaches 100%.

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