refactor: replace all explicit any types with proper TypeScript types

Backend resolvers: typed enrichArticle/enrichVideo/enrichModel with DB
and $inferSelect types, SQL<unknown>[] for conditions arrays, proper
enum casts for status/role fields, $inferInsert for .set() updates,
typed raw SQL result rows in gamification, ReplyLike interface for
ctx.reply in auth. Frontend: typed catch blocks with Error/interface
casts, isActiveLink param, adminGetUser response, tags filter callback.

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

packages/frontend/src/lib/components/header/header.svelte

@@ -38,7 +38,7 @@
     isMobileMenuOpen = false;
   }
 
-  function isActiveLink(link: any) {
+  function isActiveLink(link: { name: string; href: string }) {
     return (
       (page.url.pathname === "/" && link === navLinks[0]) ||
       (page.url.pathname.startsWith(link.href) && link !== navLinks[0])