Refactoring, regression testing until Phase 1 end.

frontend/src/routes/login/+page.svelte

@@ -1,11 +1,13 @@
 <script lang="ts">
   import { goto } from '$app/navigation';
   import LoginForm from '$lib/components/Auth/LoginForm.svelte';
-  import { login, auth } from '$lib/stores/auth';
+  import { login, isLoading, authError, clearAuthError } from '$lib/stores/auth';
   import { LayoutDashboard } from 'lucide-svelte';
 
   async function handleLogin(event: CustomEvent<{ email: string; password: string }>) {
     const { email, password } = event.detail;
+    clearAuthError();
+    
     const result = await login({ email, password });
     
     if (result.success) {
@@ -40,8 +42,8 @@
 
       <LoginForm
         on:login={handleLogin}
-        isLoading={$auth.isLoading}
-        errorMessage={$auth.error}
+        isLoading={$isLoading}
+        errorMessage={$authError}
       />
 
       <div class="divider text-base-content/40 text-sm">Demo Access</div>