Fix authentication state persistence and admin role display

- Implement complete authentication system with JWT token validation
- Add auth provider with persistent login state across page refreshes
- Create multilingual login/register forms with Material-UI components
- Fix token validation using raw SQL queries to bypass Prisma sync issues
- Add comprehensive error handling for expired/invalid tokens
- Create profile and settings pages with full i18n support
- Add proper user role management (admin/user) with database sync
- Implement secure middleware with CSRF protection and auth checks
- Add debug endpoints for troubleshooting authentication issues
- Fix Zustand store persistence for authentication state

🤖 Generated with [Claude Code](https://claude.ai/code)

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

lib/vector-search.ts

@@ -36,7 +36,20 @@ async function resolveVectorTable(language: string): Promise<{ table: string; ex
        ) AS exists`,
       [VECTOR_SCHEMA, `bv_${lang}_${ab}`]
     )
-    return { table, exists: Boolean(check.rows?.[0]?.exists) }
+    let exists = Boolean(check.rows?.[0]?.exists)
+    if (!exists) {
+      // Fallback: use any table for this language
+      const anyTbl = await client.query(
+        `SELECT table_name FROM information_schema.tables
+         WHERE table_schema = $1 AND table_name LIKE $2
+         ORDER BY table_name LIMIT 1`,
+        [VECTOR_SCHEMA, `bv_${lang}_%`]
+      )
+      if (anyTbl.rows?.[0]?.table_name) {
+        return { table: `${VECTOR_SCHEMA}."${anyTbl.rows[0].table_name}"`, exists: true }
+      }
+    }
+    return { table, exists }
   } finally {
     client.release()
   }