[SandObserver]

Summary

• Replace درون‌ریزی and برون‌بری with وارد کردن and خروجی across the 12 Persian strings that carry them, matching the wording Immich ships for the same two actions.
• Settle one word per concept: ویجت for widget across 7 strings plus 3 widget-catalogue hints, and فایل for file across 2 strings plus the system-summary filesystem slot labels.
• Translate the literal Import left inside toast.importNoChange.
• Reword importForeign.willAdd and willCreate, which read as adjectives rather than as the action about to be taken.
• Add a REJECTED gate to i18n-coverage.test.mjs that fails on any superseded term, in the dashboard catalogue and in every widget catalogue, so a bulk retranslation cannot reintroduce one.
• Record the Persian glossary in docs/i18n.md beside the existing term table, with the sources it was taken from.

Testing
All green: 1081 frontend tests, 1334 backend tests at 94.35% lines, lint, format, both typechecks, the cache-busting check, and the Docker build. Added 1 test, verified to fail by reintroducing a rejected term before reverting.

Checklist

• Stays within the project constraints: one container, no runtime dependencies, no build step (see CONTRIBUTING.md).
• Tests added or updated for new logic, and the full suite, lint, and typechecks pass.
• Docs updated if behavior or configuration changed.
• CHANGELOG.md updated under Unreleased if the change is user-visible.