[sefakerem]

What & why

Adds Turkish (tr) as a fourth UI language, next to English, Simplified Chinese and Arabic, so Turkish speakers can use the app in their own language.

• src/renderer/src/i18n/locales/tr.json: all 1170 keys, same key tree as en.json.
• src/renderer/src/i18n/index.ts: registers tr (import, LANGUAGES entry "Türkçe", left-to-right, resources, supportedLngs).
• test/turkish-ui.test.cjs: the same structural checks the Arabic locale has: registration, identical key tree, no English left behind (with an allowlist for product names, paths, pure format strings and words that are the same in Turkish, such as "terminal" and "Model"), every {{variable}} kept, inline tags and arrays kept.
• Pixel heading font (press-start-2p-latin-400.woff2): the latin subset had no İ Ğ ğ Ş ş, so Turkish headings fell back per glyph to a CJK system face ("DİL" read "D:L", "Bağlantılar" read "Ba;lantılar"). Re-cut the subset from the upstream OFL Press Start 2P file with those five code points added (4.4 KB, smaller than before; same OFL license, attribution updated in LICENSE.txt). A new test in test/bundled-fonts.test.cjs reads the woff2 cmap and checks every Turkish letter; it fails on the old file. Inter and JetBrains Mono still fall back to the system sans/mono for these five letters, which looks the same at body sizes.
• Office floor speech bubbles: the demo loop (store/mockEvents.ts) wrote English literals ("heading back to desk", "running tests", "fetching docs", "updating the todo board", …) into the demo agents' action and assistant text. They now come from a new demoFloor key tree, translated in en, zh-CN, ar and tr. Bubbles of real agents are built from their live tool calls and are not changed here.

Type of change

• Bug fix
• New feature
• Refactor / cleanup
• Docs
• Build / CI

Evidence

Both sides are the built renderer (out/renderer) in Chrome at 1440×900, same mock roster, same light theme. Before = main at 4d30bc4 with English; After = this branch with Turkish picked. In the Settings shots the language <select> is shown expanded as a list so every option is visible.

Before

Office floor on main (English):

Settings → General → Language on main: English, 简体中文, العربية. No Turkish.

After

Office floor on this branch with Turkish selected:

Settings → General → Language on this branch: "Türkçe" is selected, the Settings UI is in Turkish, and the pixel headings now render "DİL", "BİLDİRİMLER" and "Bağlantılar" correctly. The floor bubbles in the shot above are Turkish too ("panoya gidiyor", "PixelPanel.tsx düzenleniyor").

How I tested it

• OS: macOS (Darwin 25.3)
• Steps:
  • node --test test/turkish-ui.test.cjs test/arabic-ui.test.cjs test/i18n-god-name.test.cjs test/hooks-notification.test.cjs: 36/36 pass. test/bundled-fonts.test.cjs: 10/10 pass.
  • tsc --noEmit -p tsconfig.web.json: no errors.
  • Checked the ar and zh-CN floor and Settings once in the built renderer: bubbles translated, nothing else changed.
  • npm run test:focused: no new failures. The same 106 files fail with and without this change on my machine, because local node_modules is missing typescript.
  • tsc --noEmit -p tsconfig.web.json (temporary TypeScript install): no errors in i18n code. The only error is the missing vite/client types, for the same reason as above.
  • 30 random keys checked by hand for meaning and placeholders.

The tests check coverage and shape, not translation quality. A native-speaker read in the app is welcome.

Checklist

• Before and after evidence is attached above, under both headings.
• npm run typecheck passes. (not run in full locally, see above)
• npm run test:focused passes. (no new failures, see above)
• npm run build succeeds.
• This PR is one change. Unrelated fixes belong in their own PR.
• I read the diff myself before opening this, and there is no debug output, commented-out code, or unrelated formatting churn in it.
• Any new UI derives from DESIGN.md / tokens.ts — no ad-hoc colors, spacing, or fonts.
• If I added art, it's my own or compatibly licensed, and listed in ATTRIBUTION.md. (no art added)

🤖 Generated with Claude Code

[github-actions]

✅ Evidence received. Before and after are both attached. Thanks — this is what makes a PR reviewable in one pass.