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/plugins/call/CallControlState.ts

@@ -14,7 +14,7 @@ export class CallControlState {
     video: boolean,
     sound: boolean,
     screenshare = false,
-    spotlight = false
+    spotlight = false,
   ) {
     this.microphone = microphone;
     this.video = video;