Simplify the onboardinf flow components

frontend/src/stores/tenant.store.ts

@@ -92,13 +92,27 @@ export const useTenantStore = create<TenantState>()(
               get().setCurrentTenant(tenants[0]);
             }
           } else {
-            throw new Error('Failed to load user tenants');
+            // No tenants found - this is fine for users who haven't completed onboarding
+            set({ 
+              availableTenants: [],
+              isLoading: false,
+              error: null 
+            });
           }
         } catch (error) {
-          set({
-            isLoading: false,
-            error: error instanceof Error ? error.message : 'Failed to load tenants',
-          });
+          // Handle 404 gracefully - user might not have created any tenants yet
+          if (error && typeof error === 'object' && 'status' in error && error.status === 404) {
+            set({
+              availableTenants: [],
+              isLoading: false,
+              error: null,
+            });
+          } else {
+            set({
+              isLoading: false,
+              error: error instanceof Error ? error.message : 'Failed to load tenants',
+            });
+          }
         }
       },