refactor: simplify UserContext and supabaseClient

- Refactored UserContext.tsx (67 lines simplified)
- Simplified supabaseClient.ts (82 lines reduced)
- Updated .env.development for local dev

src/supabaseClient.ts

@@ -4,65 +4,35 @@ import { logger } from './debugConfig';
 const supabaseUrl = import.meta.env.VITE_SUPABASE_URL;
 const supabaseAnonKey = import.meta.env.VITE_SUPABASE_ANON_KEY;
 
-logger.info('supabase-client', '🔄 Supabase configuration', {
-  url: supabaseUrl,
-  key: supabaseAnonKey,
-});
-
 if (!supabaseUrl || !supabaseAnonKey) {
-  logger.error('supabase-client', '❌ Missing Supabase configuration', {
-    hasUrl: !!supabaseUrl,
-    hasKey: !!supabaseAnonKey,
-  });
   throw new Error('Missing Supabase configuration');
 }
 
-// Lazy-loaded Supabase client instance for non-auth operations
-let supabaseInstance: SupabaseClient | null = null;
-
-const getSupabaseClient = () => {
-  if (!supabaseInstance) {
-    logger.info('supabase-client', '🔄 Initializing Supabase client');
-    supabaseInstance = createClient(
-      supabaseUrl,
-      supabaseAnonKey,
-      {
-        auth: {
-          flowType: 'pkce',
-          autoRefreshToken: true,
-          persistSession: true,
-          detectSessionInUrl: false,
-          storage: window.localStorage,
-          storageKey: 'supabase.auth.token',
-          debug: true
-        },
-        global: {
-          headers: {
-            'X-Client-Info': 'classroom-copilot',
-          },
-        },
-        // Allow JWT issuer mismatch for local development
-        db: {
-          schema: 'public'
-        }
-      }
-    );
-
-    // Log configuration in development
-    logger.info('supabase-client', '🔄 Supabase client configuration loaded', {
-      url: supabaseUrl,
-      hasKey: !!supabaseAnonKey,
-      storageKey: 'supabase.auth.token'
-    });
-  }
-  return supabaseInstance;
-};
-
-// Export a proxy that will lazy load the client when needed
-export const supabase = new Proxy({} as SupabaseClient, {
-  get: (target, prop) => {
-    const client = getSupabaseClient();
-    return client[prop as keyof SupabaseClient];
-  }
+logger.info('supabase-client', '🔄 Initializing Supabase client', {
+  url: supabaseUrl,
+  hasKey: !!supabaseAnonKey,
 });
 
+export const supabase: SupabaseClient = createClient(
+  supabaseUrl,
+  supabaseAnonKey,
+  {
+    auth: {
+      flowType: 'pkce',
+      autoRefreshToken: true,
+      persistSession: true,
+      detectSessionInUrl: false,
+      storage: window.localStorage,
+      storageKey: 'supabase.auth.token',
+      debug: true
+    },
+    global: {
+      headers: {
+        'X-Client-Info': 'classroom-copilot',
+      },
+    },
+    db: {
+      schema: 'public'
+    }
+  }
+);