feat(gallery): bring the well-through-response ten to the extraction barHEADmain

outputWell, toast, annunciator, tapeCounter, freqScale, patchBay, dataMatrix, warningFlag, seg14, and responseGraph each get the contract comment. The six DOM builders take dupre- prefixes across their markup and CSS blocks. patchBay's live jack and the annunciator's master caution adopt the kit-wide dupre-hot and dupre-on modifiers, and the annunciator board takes dupre-warn and dupre-fault. freqScale reuses the shared scoped dupre-tick and dupre-mk (as the tuner and dualknob do) and compounds its unit label to dupre-fs-band, since dupre-band is the EQ's. The four SVG-stage builders style through the shared .rsvg stage and inline attributes, so they get the SVG-built contract comment and no prefixes.

The annunciator documented a 0..2 state per cell but painted an undefined class on an out-of-range initial state or set(). It now clamps at build and at set. Two probe checks cover the batch: one fails red without that clamp, one drives each renamed DOM builder through its handle to catch a class-name mismatch the exception scan can't see.

Extraction audit: 104/111 contract comments.

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