Update Bun to 1.4 and refresh dependencies

[bartekplus]

Summary

• pin Bun 1.4.0 across package metadata, CI, release builds, and contributor docs
• update all compatible direct and transitive dependencies and regenerate bun.lock
• apply formatting changes required by Prettier 3.9
• retain Puppeteer 24.40.0 because Puppeteer 25.9 with Firefox 154 breaks privileged extension-page automation under WebDriver BiDi

Validation

• bun install --frozen-lockfile
• bun run check
• bun run test — 1,562 passed
• bun run build
• bun run build --platform=firefox
• bun run test:e2e --platform=chrome — 26 passed
• bun run test:e2e --platform=firefox — 26 passed
• bun run test:e2e:full --platform=chrome — 65 passed, 7 expected skips
• bun run test:e2e:full --platform=firefox — 65 passed, 7 expected skips
• bun run check:e2e:coverage

[chatgpt-codex-connector]

Codex Review Summary

This comment shows the latest Codex review activity on this pull request.

Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-08-30T14:04:35.048927Z	2c087e9	PR opened

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