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/components/message/placeholder/CompactPlaceholder.tsx

@@ -23,5 +23,5 @@ export const CompactPlaceholder = as<'div', { variant?: ContainerColor }>(
         <LinePlaceholder variant={variant} style={{ maxWidth: toRem(msgSize) }} />
       </CompactLayout>
     );
-  }
+  },
 );

src/app/components/message/placeholder/DefaultPlaceholder.tsx

@@ -35,5 +35,5 @@ export const DefaultPlaceholder = as<'div', { variant?: ContainerColor }>(
         </Box>
       </ModernLayout>
     );
-  }
+  },
 );

src/app/components/message/placeholder/LinePlaceholder.tsx

@@ -11,5 +11,5 @@ export const LinePlaceholder = as<'div', css.LinePlaceholderVariants>(
       {...props}
       ref={ref}
     />
-  )
+  ),
 );