art: pixellab volume batch -- 48 props + 5 tilesets + 10 characters (2026-07-19) (#708)

Fill the visually-empty office/lab with in-world pixel-art, generated via the
pixellab MCP and grounded in the locked style (warm-grime + heavy-outline heft +
deeper shadow, view-locked; muted teal-olive-slate palette, amber-only accent) from
the 2026-07-17 overnight sweep + PALETTE_AND_DOOM_INTENSITY.

- 48 office/lab props (map objects, transparent bg): desks/chairs/monitors/PCs/
  servers/printers/filing/whiteboards/plants/kitchen/break-room/decor, in
  scummy/decent/mega tiers where relevant. Includes a doom-curve monitor.
- 5 seamless Wang tilesets (png atlas + json metadata): concrete/lino/carpet floors,
  scummy/decent walls. (Floors/walls done as tilesets, not map objects -- fixes the
  prior mistake.)
- 10 characters (8 rotations each): 8 office workers/founder/researcher/genius +
  2 cats (tabby, black).

Saved to art_source/ (tracked) where the review tool picks them up. MANIFEST.md
lists everything + params + re-roll candidates. ~96 pixellab generations spent.

Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>

Author: PipFoweraker