feat(fonts): MonoLisa 3.000 — Code everywhere, Text registered

[MarkusNeusinger]

Summary

• Switches anyplot.ai from MonoLisa 2.017 to 3.000. The v3 webfonts (70 Unicode-range subsets per family, variable wght + GRAD) are uploaded to gs://anyplot-static/fonts/v3/{code,text}/, the four variable TTFs to fonts/v3/desktop/. app/src/styles/fonts.css is now generated from the order page's builder CSS by automation/scripts/monolisa_fonts_css.py, so the next font update is a re-run.
• Absorbs the two v2 → v3 breaking changes: the script italic is ss01 (the old ss02 now means "alt i r"), and coding ligatures moved from liga to dlig, which tokens.css re-enables on pre/code/kbd/samp so code blocks look as before. CSS families are 'MonoLisa Code' and 'MonoLisa Text' (new --text token, unused by default — nothing is fetched for it).
• OG-image renderer: loads the v3 Code TTFs, sets only the wght axis of the now two-axis font (_set_variable_weight, unit-tested), caches under /tmp/anyplot-fonts/v3, draws the tagline with ss01. Docs (style guide §4/§5.1, seo.md), design-sync CSS/notes and the changelog fragment follow.

Deploy order: the v3 objects are already in the bucket (CORS verified for anyplot.ai + localhost), so this PR is safe to deploy in either order. The v2 objects stay in the bucket until the cutover is verified live; their removal is a separate, explicitly authorized step.

Plan

~/.claude/plans/ich-m-chte-die-seite-merry-meerkat.md (Phase A)

Test plan

• /verify-frontend: landing + /ternary-basic/python/bokeh at 1440×900 and 390×844, light and dark — fonts load from fonts/v3/code/ (all 200), — any library. and <em> render as script (ss01), == in the code block renders as a ligature (dlig), no console errors, no horizontal overflow at 390 px
• create_home_og_image light + dark rendered locally with the v3 TTFs: bold wordmark (wght applied on the two-axis font) and script tagline
• uv run pytest tests/unit (1932 passed), ruff check + format, mypy api core
• cd app && yarn lint && yarn fm:check && yarn type-check && yarn test && yarn build
• uv run python -m tools.changelog check --base origin/main
• After merge: Cloud Build deploy-app + deploy-api (europe-west4) green, then live check on anyplot.ai (network tab shows fonts/v3/…, script italic, code ligatures, OG endpoint)

🤖 Generated with Claude Code

[Copilot]

🟡 Changes recommended

The untested generator and several documentation and deployment-contract inconsistencies should be corrected before approval.

Get a fresh assessment by requesting another Copilot review.

Pull request overview

Migrates web and OG-image typography from MonoLisa 2.017 to MonoLisa 3.000.

Changes:

• Registers MonoLisa Code and Text v3 webfonts through generated CSS.
• Updates OpenType features, font tokens, caching, and OG rendering.
• Updates tests, design-sync configuration, documentation, and changelog.

File summaries

File	Description
.gitignore	Ignores additional proprietary font formats.
.design-sync/NOTES.md	Updates font-fetch instructions.
.design-sync/conventions.md	Documents v3 typography conventions.
api/main.py	Updates shaping diagnostics terminology.
app/.designsync-fonts/monolisa.css	Registers v3 desktop font families.
app/index.html	Preloads v3 Code subsets.
app/src/main.tsx	Updates the font import description.
app/src/sections/landing/HeroSection.tsx	Uses the v3 script feature.
app/src/styles/fonts.css	Defines generated v3 webfont subsets.
app/src/styles/tokens.css	Adds v3 families and coding ligatures.
app/src/theme/tokens.ts	Exposes Code and Text stacks.
automation/scripts/monolisa_fonts_css.py	Generates the webfont stylesheet.
changelog.d/monolisa-v3.md	Records the migration.
core/images.py	Loads and configures v3 OG fonts.
docs/reference/seo.md	Documents OG font rendering.
docs/reference/style-guide.md	Updates typography guidance.
tests/unit/core/test_images.py	Tests v3 paths, axes, and shaping.

Review details

• Files reviewed: 16/17 changed files
• Comments generated: 6
• Review effort level: Balanced (auto)

Note

Copilot is running an experiment and ran this review at Balanced.

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[MarkusNeusinger]

Copilot round 1, all six applied in 966749f: unit tests for the generator (tests/unit/automation/scripts/test_monolisa_fonts_css.py, 10 cases), preload comment in app/index.html now describes the swap face, generated header says "anyplot.ai + localhost", changelog fragment states that v2 removal is a separate authorized step, ss02 → ss01 in the core/images.py docstring and api/Dockerfile, style-guide skeleton mirrors the three real preloads. The same commit merges origin/main (font-cache rework from #11828) into the branch.

[codecov]

Codecov Report

❌ Patch coverage is 87.05882% with 11 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
automation/scripts/monolisa_fonts_css.py	85.91%	10 Missing ⚠️
core/images.py	92.85%	1 Missing ⚠️

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