feat(gallery): add R08-R11 from hi-fi and cockpit references

Four more reference-batch widgets as inline SVG, from pasted hardware references (a hi-fi chrome level window, aviation instrument clusters, and a vintage altimeter):

- R08 chrome MIN/MAX indicator: polished ring, brushed metal dome, cog hub, dark pointer sweeping MIN to MAX.
- R09 black-face aviation gauge: amber ticks and numerals on black, painted green/amber/red zone arcs per the airspeed-indicator scheme, glowing amber needle.
- R10 data matrix readout: a lit amber data block with labeled fields; click cycles SYS/NET/TIME pages, and the TIME page runs off the real clock.
- R11 warning flag window: a striped barber-pole slides into the window when tripped, the mechanical alarm idiom as distinct from a lamp.

I verified all four in headless Chrome: both meters track drags, the pages cycle, the flag trips and clears, no console exceptions. The gallery is at 64 cards.

0 files changed, 0 insertions, 0 deletions