fix(shared): resolve session persistence issue on browser refresh

- Initialize session state on SupabaseService startup
- Add async getCurrentSession() method for reliable session retrieval
- Make authAdminGuard async to properly await session initialization
- Add auth state change listener to maintain session updates

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

Co-Authored-By: Claude <[email protected]>

Author: Lukecsharpwalker

projects/admin/src/app/core/guards/authAdminGuard.ts

@@ -3,10 +3,11 @@ import { CanMatchFn, Router } from '@angular/router';
 import { Roles } from 'shared';
 import { SupabaseService } from 'shared';
 
-export const authAdminGuard: CanMatchFn = (): boolean => {
+export const authAdminGuard: CanMatchFn = async (): Promise<boolean> => {
   const supabaseService = inject(SupabaseService);
   const router = inject(Router);
-  const session = supabaseService.getSession();
+  
+  const session = await supabaseService.getCurrentSession();
   if (session?.user?.app_metadata?.['role'] === Roles.ADMIN) {
     return true;
   } else {

projects/shared/src/services/supabase.service.ts

@@ -21,12 +21,34 @@ export class SupabaseService {
     this.supabase = this.ngZone.runOutsideAngular(() =>
       createClient(environment.supabaseUrl, environment.supabaseKey)
     );
+    this.initializeSession();
+  }
+
+  private async initializeSession(): Promise<void> {
+    const { data: { session } } = await this.supabase.auth.getSession();
+    this.session = session;
+    
+    this.supabase.auth.onAuthStateChange((event, session) => {
+      this.ngZone.run(() => {
+        this.session = session;
+      });
+    });
   }
 
   getSession(): AuthSession | null {
     return this.session;
   }
 
+  async getCurrentSession(): Promise<AuthSession | null> {
+    if (this.session) {
+      return this.session;
+    }
+    
+    const { data: { session } } = await this.supabase.auth.getSession();
+    this.session = session;
+    return session;
+  }
+
   authChanges(callback: (event: AuthChangeEvent, session: Session | null) => void) {
     return this.supabase.auth.onAuthStateChange(callback);
   }