Fix TypeScript errors blocking production build

- ArticleEditor: annotate map callback parameter as string
- ui.ts: prefix unused get parameter with _ to silence noUnusedLocals

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/components/article/ArticleEditor.tsx

@@ -55,7 +55,7 @@ export function ArticleEditor() {
         content: content.trim(),
         summary: summary.trim() || undefined,
         image: image.trim() || undefined,
-        tags: tags.split(",").map((t) => t.trim()).filter(Boolean),
+        tags: tags.split(",").map((t: string) => t.trim()).filter(Boolean),
       });
       clearDraft();
       setPublished(true);