Make text-zone auto-fit respect every language

[flocom]

Summary

Follow-up to #77. The text-zone auto-fit shrank each language independently, so a longer translation (e.g. German/French) could overflow the zone even when the edited language fit perfectly — the zone wasn't respected across languages.

Fix

Adds a "Same size for all languages" mode to the Text zone (on by default):

• The font is reduced to the size that fits the most-constrained project language (the longest), then applied uniformly to all languages.
• The text now stays inside the zone — entirely and without breaking a word — in every language, with consistent sizing.
• Languages without text impose no constraint.
• The toggle can be turned off to restore independent per-language fitting.

Implementation

• app.js: split computeZoneFit into a per-language zoneFitForText + a uniform pass that takes the minimum scale over state.projectLanguages; textZone.uniform flag added to defaults + normalization; toggle wiring and UI sync.
• index.html / styles.css: "Same size for all languages" toggle.

Verification

• node --check app.js passes.
• Dev server serves the updated UI (toggle present).
• Extended standalone algorithm tests (11/11): the shared scale makes both a short (EN) and a long (DE) translation fit the zone, and equals the most-constrained language's scale.

Behaviour note: with the toggle on (default), editing a short language now shows the text at the size that fits the longest language (so possibly smaller than before) — that is what guarantees the zone is respected everywhere.

🤖 Generated with Claude Code

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Generated by Claude Code