Swedish interface translation (sv)

Adds Swedish (Svenska) as an interface language in the menu, panel and
effect catalogs, written from the English source. The effect rows are
partial like Japanese and Georgian: an effect without a Swedish row draws
its English name, so a new effect does not block other PRs (#2244).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

docs/gaps.md

@@ -327,8 +327,8 @@ Issues #41–#47 (all from the Linux AppImage 0.1.1, 5 October): panning the vie
 
 - Localisation of the interface ([localization-parity.md](localization-parity.md)): since 6–12
   October the menus are translated into Japanese, Simplified and Traditional Chinese, Ukrainian,
-  Spanish, Brazilian Portuguese, Russian, French, German, Czech and Georgian, and the panel catalog covers
-  Japanese, both Chinese, Ukrainian, Brazilian Portuguese, Czech and Georgian. Next: effect and parameter
+  Spanish, Brazilian Portuguese, Russian, French, German, Czech, Georgian and Swedish, and the panel catalog covers
+  Japanese, both Chinese, Ukrainian, Brazilian Portuguese, Czech, Georgian and Swedish. Next: effect and parameter
   names, the remaining panel strings (Spanish, Russian, French, German), Korean and Italian, and
   native-speaker review of all of them.
 - Accessibility (keyboard navigation, screen readers, contrast), user documentation and

docs/localization-parity.md

@@ -27,10 +27,10 @@ interface; Arabic and Hebrew text *in layers* is supported through its Middle Ea
   Chinese (998), Traditional Chinese (951, after #2244 pruned the table), Ukrainian (524),
   Brazilian Portuguese (695), Czech (518) and Spanish (513); counted at this tree. Georgian has
   the Simplified Chinese catalog's 694 rows, plus 191 for panels converted to the catalog since
-  (885 in all).
+  (885 in all). Swedish (added later) also has one.
 - **Effect names:** `crates/ui-egui/src/i18n/effects.rs`, keyed by **effect id**, in Simplified
-  Chinese (307 rows, one per effect in the registry), Japanese (297 of the 307 ids) and Georgian
-  (307 rows, plus its 21 categories). The registry's
+  Chinese (307 rows, one per effect in the registry), Japanese (297 of the 307 ids), Georgian
+  (307 rows, plus its 21 categories) and Swedish (307 rows, plus its 21 categories). The registry's
   English name stays the effect's identity: `effect.list`, `effect.apply {"effect": …}`, scripts
   and expressions match on it, and the property tree stores it as the effect group's name. Only
   the drawing — the Effect menu, Effect Controls, the Timeline and Effects & Presets — goes
@@ -88,7 +88,7 @@ counted, so the true percentages are slightly lower.
 | Korean | `ko` | 0 | — | Hangul fallback probe added (#599, closed); not checked on macOS here | no | none | 9–13 h + review |
 | Vietnamese | `vi` | 0 | — | Latin with stacked diacritics; untested | no | none (After Effects: none) | 8–12 h + review |
 
-Other languages EffectCraft ships (5):
+Other languages EffectCraft ships (6):
 
 | Language | Code | UI strings translated | Status | To `full` |
 |---|---|---|---|---|
@@ -97,6 +97,7 @@ Other languages EffectCraft ships (5):
 | Polish | `pl` | 1,325 (≈ 34%): menus 630 rows, panels 695 | partial; unwrapped UI, effects and engine text still in English; AI-drafted, native review welcome | Remaining strings + native review |
 | Czech | `cs` | 1,147 (≈ 29%): menus 629 rows, panels 518 | Existing catalog entries covered; unwrapped UI, effects and engine text still in English; AI-assisted, not yet native-speaker proofread | Remaining strings + independent native review |
 | Georgian | `ka` | 1,514 (≈ 39%): menus 629 rows, panels 885 (the Simplified Chinese catalog's 694 plus 191 Georgian-only rows: form dialogs, context menus, column headers), effect names 307 + 21 categories; native-speaker reviewed | partial | 5–8 h |
+| Swedish | `sv` | menus 630 rows, panels 723, effect names 307 and categories 21; added after the measurement above | Settings, Edit menu and Match System (`sv-*` locales) offer it; parameter and engine text still in English; not yet native-speaker reviewed | Remaining strings + native review |
 
 Russian (`ru`) has a menu catalog (630 rows, ≈ 15%); After Effects also ships Italian, which EffectCraft does not (8–12 h).
 

docs/preferences.md

@@ -30,7 +30,7 @@ Commands (CLI, MCP, control channel):
 
 ### Settings that change behaviour
 
-- `general.language`: interface language (`system` / `en` / `ja` / `zh-hans` / `zh-hant` / `uk` / `es` / `pt-br` / `ka`), Settings ▸ General ▸ Language; menu labels change immediately. `system` (Match System, the default) follows the operating system's interface language where EffectCraft has a translation and is English otherwise: a Simplified Chinese locale (`zh`, `zh-CN`, `zh_CN.UTF-8`, `zh-Hans-CN`, `zh-SG`) selects `zh-hans`, a Traditional one (`zh-TW`, `zh-HK`, `zh-Hant`, `zh_MO`) selects `zh-hant`, a Ukrainian one (`uk`, `uk-UA`, `uk_UA.UTF-8`) selects `uk`, a Spanish one (`es`, `es-ES`, `es_MX.UTF-8`) selects `es`, a Portuguese one (`pt`, `pt-BR`, `pt_PT.UTF-8`) selects `pt-br`, a Georgian one (`ka`, `ka-GE`, `ka_GE.UTF-8`) selects `ka`; the browser build follows `?lang=` in the address, then the browser's languages (`navigator.languages`). Choose **Español** or **Português (Brasil)** for Spanish or Brazilian Portuguese menus (panels stay in English for now); choose **Українська** for Ukrainian menus and cataloged panel, dialog, button and tooltip text; Ukrainian uses the bundled UI fonts. Native Japanese, Simplified and Traditional Chinese UI uses installed system fonts; the web host must supply a Japanese font. The same setting picks the CJK fallback for the interface *and* the Han preference of the text engine, so the composition's own text is drawn with the same language's glyph forms (the text engine's preference is process-global); swapping the language reinstalls the fonts, so it applies without a restart. Two catalogs back the text: the menus are keyed by `(command, English label)` (`crates/ui-egui/src/i18n.rs`), and the rest of the interface - panels, dialogs, buttons, tooltips - is keyed by its English source string (`crates/ui-egui/src/i18n/ui.rs`, with rows for Japanese, Simplified and Traditional Chinese and Ukrainian), where a panel writes `tr("Rename")`, or `tr_args("Proxy Use: {}", &[&quality])` when the row carries a value. A row that is missing falls back to English, so a new string shows up untranslated rather than empty; the `missing_translations_report` test lists what each language lacks, and the tests in `ui.rs` fail on an unused row.
+- `general.language`: interface language (`system` / `en` / `ja` / `zh-hans` / `zh-hant` / `uk` / `es` / `pt-br` / `ka` / `sv`), Settings ▸ General ▸ Language; menu labels change immediately. `system` (Match System, the default) follows the operating system's interface language where EffectCraft has a translation and is English otherwise: a Simplified Chinese locale (`zh`, `zh-CN`, `zh_CN.UTF-8`, `zh-Hans-CN`, `zh-SG`) selects `zh-hans`, a Traditional one (`zh-TW`, `zh-HK`, `zh-Hant`, `zh_MO`) selects `zh-hant`, a Ukrainian one (`uk`, `uk-UA`, `uk_UA.UTF-8`) selects `uk`, a Spanish one (`es`, `es-ES`, `es_MX.UTF-8`) selects `es`, a Portuguese one (`pt`, `pt-BR`, `pt_PT.UTF-8`) selects `pt-br`, a Georgian one (`ka`, `ka-GE`, `ka_GE.UTF-8`) selects `ka`, a Swedish one (`sv`, `sv-SE`, `sv_SE.UTF-8`) selects `sv`; the browser build follows `?lang=` in the address, then the browser's languages (`navigator.languages`). Choose **Español** or **Português (Brasil)** for Spanish or Brazilian Portuguese menus (panels stay in English for now); choose **Українська** for Ukrainian menus and cataloged panel, dialog, button and tooltip text; Ukrainian uses the bundled UI fonts. Choose **Svenska** for Swedish menus, panels and effect names. Native Japanese, Simplified and Traditional Chinese UI uses installed system fonts; the web host must supply a Japanese font. The same setting picks the CJK fallback for the interface *and* the Han preference of the text engine, so the composition's own text is drawn with the same language's glyph forms (the text engine's preference is process-global); swapping the language reinstalls the fonts, so it applies without a restart. Two catalogs back the text: the menus are keyed by `(command, English label)` (`crates/ui-egui/src/i18n.rs`), and the rest of the interface - panels, dialogs, buttons, tooltips - is keyed by its English source string (`crates/ui-egui/src/i18n/ui.rs`, with rows for Japanese, Simplified and Traditional Chinese and Ukrainian), where a panel writes `tr("Rename")`, or `tr_args("Proxy Use: {}", &[&quality])` when the row carries a value. A row that is missing falls back to English, so a new string shows up untranslated rather than empty; the `missing_translations_report` test lists what each language lacks, and the tests in `ui.rs` fail on an unused row.
 - `general.undoLevels`: Levels of Undo
 - `general.pathPointSize`: Path Point and Handle Size
 - `general.recentItems`: Recent Projects Shown