* refactor(i18n): migrate app copy to domain namespaces
- Replace the monolithic dialogs catalog with 16 flat product-domain catalogs
- Preserve every translated locale value while moving all 356 messages
- Expose narrow domain composables and retain useI18n as a compatibility aggregate
- Document namespace ownership and admission rules
* fix(i18n): complete migrated locale coverage
- Translate exposed MCP automation, code editor, credential, and media placeholders
- Restore missing German, Spanish, French, Italian, Polish, and Russian diacritics
- Preserve technical product terms and interpolation placeholders
* fix(i18n): polish remaining locale wording
- Correct the mixed-language German code source label
- Preserve stock_photo and Pexels semantics in German and Polish
- Improve Italian MCP and code-editor grammar
- Use the standard Russian term for MCP endpoint
* fix(i18n): migrate diagnostics copy after rebase
- Add a diagnostics domain for newly merged usage and telemetry settings
- Keep settings navigation labels in the settings domain
- Preserve translated diagnostics catalogs from current master
* style(app): format rebased settings components
* refactor(i18n): simplify domain message keys
- Remove redundant domain prefixes from settings, diagnostics, automation, and integration catalogs
- Move feature-specific actions out of the common namespace
- Preserve current-master language picker and diagnostics copy across every locale
- Update consumers to concise semantic keys
* fix(app): preserve font and updater contracts
- Restore browser and abort-aware font loading from current master
- Remove the unused parameter helper from common messages
- Update updater tests for semantic domain keys
* fix(i18n): finish semantic diagnostics access
* refactor(i18n): derive active MCP status message
* fix(i18n): preserve rendering settings after rebase
- Add a rendering domain for tiled canvas preferences
- Preserve the current-master language and rendering settings UI
- Move every translated renderer preference out of the retired dialogs catalog
* fix(i18n): polish reviewed locale semantics
* test(i18n): enforce translation completeness baseline
- Fail on interpolation placeholder drift and suspicious mixed-script values
- Reject new source-identical translations while tracking existing debt explicitly
- Report translated-message coverage for every supported locale
- Require baseline cleanup when existing placeholders are translated
* refactor(i18n): baseline reviewed mixed-script messages
- Replace brittle product-vocabulary exceptions with Unicode script detection
- Track reviewed mixed-script messages by stable locale and message identity
- Reject new entries and stale baseline debt without hardcoded terminology
* fix(fig): resolve relocated stroke test helper
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