8582e956c9
Extends the studio's 2-color palette to the full 4-color brand theme (accent / secondary / background / text) matching the Remotion SceneColors, so the studio's colour state maps 1:1 to the scene engine. - studio-store: add sceneSecondaryColor + sceneTextColor + their setters + an applySceneTheme(accent,secondary,background,text) action (sets all four + recolours canvas layers: bg→background, overlays→secondary, shapes→accent, text→text explicitly); persist both new fields in hydrate + getSceneDataForSave. - studio-scene-data: carry sceneSecondaryColor + sceneTextColor through VideoPersistedSceneData / build / parse (with defaults). - ColorsCustomTab: 6 one-click theme presets (Warm/Berry/Midnight/Ocean/Sunset/ Mono) + 4 manual colour inputs + Apply. - i18n: secondaryColor/textColor/themePresets/applyTheme(+preset) in fa + en. Verified with `npm run build`. NOTE: the theme persists in scene_data and recolours the canvas; wiring the 4 colours all the way to a FlexStory render's saved_shared_colors depends on the studio-svc shared-colour sync (a small follow-up). Block-FIELD editing remains the Phase 4 follow-up. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>