debug: add detailed error logging for trainers fetch

- Add console logs to debug Supabase connection
- Improve error message handling for non-Error objects
- Add client-side logging for Supabase configuration

admin-web/lib/supabase.ts

@@ -1,13 +1,19 @@
 import { createClient } from '@supabase/supabase-js'
 
-const supabaseUrl = process.env.NEXT_PUBLIC_SUPABASE_URL === 'your_supabase_project_url' 
-  ? 'http://localhost:54321' 
-  : (process.env.NEXT_PUBLIC_SUPABASE_URL || 'http://localhost:54321')
-const supabaseKey = process.env.NEXT_PUBLIC_SUPABASE_ANON_KEY === 'your_supabase_anon_key'
-  ? 'placeholder-key'
-  : (process.env.NEXT_PUBLIC_SUPABASE_ANON_KEY || 'placeholder-key')
+const supabaseUrl = process.env.NEXT_PUBLIC_SUPABASE_URL || 'http://localhost:54321'
+const supabaseKey = process.env.NEXT_PUBLIC_SUPABASE_ANON_KEY || 'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpc3MiOiJzdXBhYmFzZS1kZW1vIiwicm9sZSI6ImFub24iLCJleHAiOjE5ODM4MTI5OTZ9.CRXP1A7WOeoJeXxjNni43kdQwgnWNReilDMblYTn_I0'
 
-export const supabase = createClient(supabaseUrl, supabaseKey)
+if (typeof window !== 'undefined') {
+  console.log('Supabase URL:', supabaseUrl)
+  console.log('Supabase Key configured:', !!supabaseKey)
+}
+
+export const supabase = createClient(supabaseUrl, supabaseKey, {
+  auth: {
+    autoRefreshToken: true,
+    persistSession: true,
+  },
+})
 
 export const isSupabaseConfigured = () => {
   const url = process.env.NEXT_PUBLIC_SUPABASE_URL