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/markdown/block/runner.ts

@@ -14,7 +14,7 @@ export const runBlockRule = (
   text: string,
   rule: BlockMDRule,
   parse: BlockMDParser,
-  parseInline?: (txt: string) => string
+  parseInline?: (txt: string) => string,
 ): string | undefined => {
   const matchResult = rule.match(text);
   if (matchResult) {

src/app/plugins/markdown/block/type.ts

@@ -18,7 +18,7 @@ export type BlockMDParser = (text: string, parseInline?: (txt: string) => string
  */
 export type BlockMatchConverter = (
   match: MatchResult,
-  parseInline?: (txt: string) => string
+  parseInline?: (txt: string) => string,
 ) => string;
 
 /**