Merge origin/main into m3/nvenc-hevc-main10

Export panel: the HEVC profile labels go through tl! with Spanish entries.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

ROADMAP.md

@@ -209,4 +209,4 @@ Status: ✅ done · 🟡 in progress · ⬜ not started. Estimates are remaining
 
 ### Interface localization
 
-Edit > Language switches English/Japanese/Spanish/Portuguese (Brazilian) and persists in UI state. Commands `app.language.english`, `app.language.japanese`, `app.language.spanish` and `app.language.portuguese` are reachable through the control channel. Core native/in-window menu labels are translated; untranslated labels use English. Japanese text uses the Japanese fonts from [craft-fonts](https://github.com/storytold/craft-fonts) when FilmCraft is built with them (`CRAFT_FONTS_DIR`; all official releases, including the web build), otherwise a Japanese font already installed on the system; with neither, switching to Japanese is refused with a message. Dialog/panel translation coverage remains open. Existing vertical text support is preserved.
+Edit > Language switches English/Japanese/Spanish/Portuguese (Brazilian) and persists across restarts through `general.interfaceLanguage` (also available in Settings > General). Until a language is chosen, System Language (the default) follows the operating system's or browser's preferred languages and falls back to English. Commands `app.language.english`, `app.language.japanese`, `app.language.spanish` and `app.language.portuguese` are reachable through the control channel. Translations live in one catalog per language (`crates/ui-egui/src/i18n/<code>.tsv`); UI code wraps its strings in `tl!("…")` / `tlf!("…{name}", name)`, and names that come from registries (effects and their parameters, settings, commands, panels, workspaces, presets) are translated where they are drawn. **Spanish covers the whole interface**: menus, panels, dialogs, the Settings pages, the Effects/Effect Controls registry, the Keyboard Shortcuts dialog and status messages; tests fail when a `tl!` literal, a menu label or a registry name has no Spanish entry. Searches match the displayed labels as well as English sources. Japanese and Brazilian Portuguese cover the core menus; untranslated labels use English. Engine error messages, the control channel, the CLI and MCP stay in English. Japanese text uses the Japanese fonts from [craft-fonts](https://github.com/storytold/craft-fonts) when FilmCraft is built with them (`CRAFT_FONTS_DIR`; all official releases, including the web build), otherwise a Japanese font already installed on the system; with neither, switching to Japanese is refused with a message. Existing vertical text support is preserved.