Fix all ESLint errors: remove unused imports, replace any types

- Remove ~60 unused imports and variables across 88 files
- Replace ~80 `any` type annotations with proper types (unknown,
  Record<string, unknown>, or specific types)
- Prefix unused callback args with underscore
- Fix unescaped JSX entities
- Lint now passes cleanly (0 errors, 2 intentional img warnings)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/components/shared/detail-layout.tsx

@@ -37,7 +37,7 @@ export function DetailLayout({
   function handleTabChange(tabId: string) {
     const params = new URLSearchParams(searchParams.toString());
     params.set('tab', tabId);
-    router.replace(`${pathname}?${params.toString()}` as any, { scroll: false });
+    router.replace(`${pathname}?${params.toString()}`, { scroll: false });
   }
 
   if (isLoading) {