[m1ngsama]

Prompt's pages leave most of a large window empty. This adds ASCII pictures that fill the space, gain detail as the window grows, and degrade with the terminal's capabilities. The base is #97 and should move to main once #97 and #92 merge.

Decision for review: src/core/pixel-art-fine.ts and the new "Picture Detail" setting add an opt-in tier of Unicode blocks (off by default). Drop both if Prompt should stay ASCII-only.

Tiers. Pictures use the finest tier the terminal supports:

Tier	When	Drawing
Fine	truecolor, Unicode, and Settings → Picture Detail → Fine	blocks and Braille with smooth colour
Color	colour on	ASCII characters in colour; a faint background tint only in truecolor
Tone	no colour or NO_COLOR	ASCII characters whose density follows brightness

LANG=C stays ASCII. Nothing is drawn below 30 columns by 7 rows, so a full 80×24 page is unchanged.

Pictures

• Home, Schedule, Docs: a landscape spans the width below the content when 8 or more rows are free, and sits beside it otherwise. Home shows a seascape that follows the local time, with the moon at its real phase. Schedule shows ridges with one trail tick per week. Docs shows a growing bookcase with a cat.
• Home (beside), About: a shaded moon at today's phase and a banded gas giant. Each cell's brightness comes from the sphere's surface normal, not from a bitmap. The fine tier draws them as smooth half blocks.
• Empty states: a crescent moon among stars for no events, and a magnifier for no search results, both six rows tall.
• Home on a day without classes: a cup of tea with drifting steam, in the 16 to 29 columns beside the content where the full landscape does not fit.
• Loading: a small planet with a moon circling it, one step per frame, on Home, Schedule, Docs, and Events. Reduced-motion terminals see a still frame.
• Load errors on Events and Docs: a transmitter with dim waves and a red cross beside the message. The hint, and any URL in it, stays on its own full-width line.
• Settings: the emblem at the largest size that fits. Events: the next event's icon beside the heatmap, and an icon beside each event title in the details view.

Algorithms. Cells are matched against measured glyph coverage, and brightness error is diffused to neighbouring cells in serpentine Floyd–Steinberg order, as in the libcaca study, so gradients mix densities instead of banding. Flat areas choose only among density-ramp glyphs (.:-=+*#%@), so the mixing reads as shading, not noise. Planets are lit by their surface normals, as in donut.c, with normals bumped by fractal and Worley noise height fields; the textures turn over time while loading.

scripts/generate-art.mjs regenerates the static bitmaps and shaded emblems; scripts/generate-glyphs.mjs measures the ink coverage of each ASCII character. Landscapes are generated at runtime and cached per window size and five-minute step. The package grows from 130,040 to about 154,000 bytes compressed, with no new dependencies.

Validation: npm run check (1,161 tests, package check, audit with zero vulnerabilities). Checked in a pseudoterminal at 80×24, 110×28, 150×42, with and without LANG=C and NO_COLOR. The fine tier was checked on the About page only.