Round 7: zero-text frames, escaped/curly titles, plan-driven banner crops

The consultant's review of the shipped set found two defects, both ours, and both fixed
at the source rather than in the output:

1. The banner/thumb crop re-framing detected only the glowing core of the object. Column
   brightness measures 2-6 levels above the background on dark glass, so it boxed 8 % of
   the frame for an object group spanning 35 %+. The detector is now a background-plane
   deviation plus the largest connected components (`plan_banner_crops.py`, detector in
   `probe_band_crop.py`), 0 % false-positive on the frame's own negative space, stable
   across thresholds. The crop plan is frozen as `banner-plan.json` and consumed by the
   renderer; a thin subject is centred at 53.5 % of the banner width with the shortfall
   filled by the art's own edge pixels, one row at a time (a single averaged fill left a
   visible tonal step, tried and rejected). Measured on the delivered 72: 0 clipped,
   silhouette median 47.0 %, centre median 53.5 % (`verify_banner_crops.py`).

2. `art-meta.json` pinned two slugs to the hand-accepted sample frames — the very frames
   that carried the HUD readouts — which also kept them out of the crop plan. Pins removed.

Prompt side: 9 frames still printed glyphs at the consultant's bar (>=12 px and >=2
characters). Every offending noun is measured and now asserted against: a literal `marked
at 28` printed "28"; `storefront kiosk` printed "PRINATA"; `voucher card` printed
"Voucher"; `market booths` printed "10MARKET"; `glass button` printed "OC"; `gateway pylon`
printed "GATELY". 50 forbidden words, 0 hits across 72 captions, and all 9 frames
re-rendered clean.

Also: YAML escapes are honoured in the frontmatter reader and straight quotes become
curly ones (the ZH cards shipped a literal backslash), the evidence line is capped at 65
characters, and the light theme gives dark artwork a hairline border plus a soft shadow
(consultant option A) so it reads as a dark display case instead of a black slab.

OCR gate at the consultant's bar: 72/72 frames clean (16 carry sub-threshold single
glyphs, exempt as geometry noise).

scripts/og-gen/captions/one-prometheus-for-unraid-synology-and-a-vps.json

@@ -1 +1 @@
-{"high_level_description":"A dark-mode 3D cyber-bento concept art and technical blueprint schematic of a single piece of industrial hardware. The main high-detail 3D focal subject is positioned strictly on the right side of the canvas, leaving expansive clean dark negative space across the entire left side.","style_description":{"aesthetics":"modern dark cyber-bento, industrial precision, sleek machined surfaces, raytraced ambient occlusion","lighting":"volumetric studio rim lighting in royal cobalt blue (#4d82ff) with emerald green (#4ade80) status nodes and gold (#f5c24a) telemetry glints and subtle cyan glow","medium":"3d_render","art_style":"octane render, matte obsidian hardware, frosted acrylic glass, technical blueprint vector lines","color_palette":["#0B0F19","#111827","#1E293B","#4ADE80","#F5C24A","#4D82FF"]},"compositional_deconstruction":{"background":"Deep midnight obsidian slate background (#0b0f19 to #111827) fading into pure clean negative space across the entire left 60% of the horizontal canvas, with faint technical blueprint grid crosshairs and delicate vector coordinate lines.","elements":[{"type":"obj","bbox":[150,550,850,945],"desc":"A single radiant central telemetry beacon sending precision laser monitoring vectors to three distinct hexagonal platform nodes, illuminating transparent storage volumes with holographic metrics. Clean unbranded matte surfaces, blank panels, no printed markings. Razor-sharp detail, no text, no letters, no watermark."}]}}
+{"high_level_description":"A dark-mode 3D cyber-bento product render of a single piece of industrial hardware, photographed on a seamless dark backdrop. The main high-detail 3D focal subject is positioned on the right side of the canvas, leaving clean dark negative space across the left side.","style_description":{"aesthetics":"modern dark cyber-bento, industrial precision, sleek machined surfaces, raytraced ambient occlusion","lighting":"volumetric studio rim lighting in royal cobalt blue (#4d82ff) with emerald green (#4ade80) status nodes and gold (#f5c24a) telemetry glints and subtle cyan glow","medium":"3d_render","art_style":"octane render, matte obsidian hardware, frosted acrylic glass, precise machined surface detail","color_palette":["#0B0F19","#111827","#1E293B","#4ADE80","#F5C24A","#4D82FF"]},"compositional_deconstruction":{"background":"Deep midnight obsidian slate background (#0b0f19 to #111827) fading into pure clean negative space across the entire left 60% of the horizontal canvas, with a soft rim vignette and faint volumetric haze.","elements":[{"type":"obj","bbox":[150,550,850,945],"desc":"A single radiant central telemetry beacon sending precision laser monitoring vectors to three distinct hexagonal platform nodes, illuminating transparent storage volumes with holographic metrics. Clean unbranded matte surfaces, blank panels, no printed markings. Razor-sharp detail, no text, no letters, no watermark."}]}}