chore(main): release 2.0.0

[github-actions]

🤖 I have created a release beep boop

2.0.0 (2026-07-26)

⚠ BREAKING CHANGES

• complete rewrite; legacy flat storage keys are migrated non-destructively to the new settings object on first run.

Features

• add a display-language selector and localize the website into Hindi and Chinese (ceafab0)
• add comprehensive Vitest test suite with 96% coverage (c6c7718)
• add dark mode with a light/dark/system theme to the extension and website (90a3bfc)
• fold store zips into builds, declare AMO data collection, extend lint gates (a3f7649)
• providers: add OpenAI-compatible server provider (82eb595)
• rebuild as Cloud Speech for Chrome with multi-provider TTS (3cda6cf)
• rename to Cloud Speech, add Firefox support, and unify store builds (89f1a4b)
• validate credentials client-side and harden sync, reading, and picker flows (674597a)
• web: rework the extra-models guide around LiteLLM, fix dev-mode reset (45f0f19)

Bug Fixes

• add type assertions for Chrome storage API (09e41e6)
• avoid #i18n in the background module graph (3f15c1c)
• correct TypeScript types in test files (ae2c942)
• dev: keep the web dev server foreground and stop it with the orchestrator (60aa0dd)
• drop code_quality ruleset rule the rulesets API rejects (2d2b63c)
• gate merges on CodeQL warnings as well as errors (1ebb1cd)
• ignore unused variables starting with underscore (e1bc84d)
• install missing @testing-library/react dependency (116ff75)
• popup: drop the inline error text on unavailable voices (398bd47)
• providers: reject transient custom-server failures instead of masking them (a46f4ae)
• resolve all ESLint errors and update pre-commit hook (1d6f98e)
• resolve CodeQL alerts in tag stripping and dev shell commands (9109d68)
• settings: only claim previous credentials were kept when some existed (b69e76f)

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