chore: upgrade i18next 26, prettier 3, fontsource-variable, domhandler 6, lint-staged 17

- i18next 23->26 + react-i18next 15->17
- prettier 2->3, reformat all files
- replace @fontsource/inter with @fontsource-variable/inter 5, update import path
- domhandler 5->6 (aligns with transitive deps)
- lint-staged 16->17

src/app/hooks/media/useMediaPlaybackRate.ts

@@ -8,7 +8,7 @@ export type MediaPlaybackRateControl = {
 };
 
 export const useMediaPlaybackRate = (
-  getTargetElement: () => HTMLMediaElement | null
+  getTargetElement: () => HTMLMediaElement | null,
 ): MediaPlaybackRateData & MediaPlaybackRateControl => {
   const [rate, setRate] = useState(1.0);
 
@@ -18,7 +18,7 @@ export const useMediaPlaybackRate = (
       if (!targetEl) return;
       targetEl.playbackRate = playbackRate;
     },
-    [getTargetElement]
+    [getTargetElement],
   );
 
   useEffect(() => {