[A-EDev]

Summary

• isTauriEnv() waits up to 100 ms for Tauri's bridge and reads window after each 10 ms pause. When a test file finishes during that wait, jsdom is torn down, the next read throws, and Vitest reports an unhandled rejection that fails the run although every test passed. That is what failed Quality checks on main after fix(i18n): mirror the layout in right-to-left languages and keep foreign titles in order #548 (run 42837153459, started from musicAudioSettings.test.ts).
• The loop now stops and answers false when window is gone. A co-located test covers it.

Related issue

Change type

• Bug fix
• Feature
• Refactor or maintenance
• Documentation
• Build, packaging, or CI

Validation

• pnpm test: 386 files, 2287 tests passed, no unhandled errors. The new test fails without the fix ("promise rejected TypeError") and passes with it.
• pnpm build: passed
• cargo fmt --manifest-path src-tauri/Cargo.toml --all -- --check: clean
• cargo clippy --manifest-path src-tauri/Cargo.toml --all-targets --all-features: exit 0 (no Rust changes)
• cargo test --manifest-path src-tauri/Cargo.toml --all-targets --all-features: 1680 passed, 0 failed
• I smoke-tested the affected desktop behavior.

Screenshots or recordings

Risk and compatibility

• No change in the app: inside Tauri window never goes away. No changelog entry, since nothing changes for users.

• No new secrets, private data, telemetry, or broad Tauri permissions were introduced.

• User-facing documentation was updated where needed.

• Dependency and lockfile changes are intentional and limited to this PR.

• Breaking changes and upgrade steps are clearly documented.

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