Remove all obsolete authentication, settings, admin, and demo-related components and pages

- Eliminated redundant components, pages, and layouts related to authentication (`login`, `register`, `password-reset`, etc.), user settings, admin, and demos.
- Simplified the frontend structure by removing unused dynamic imports, forms, and test code.
- Refactored configurations and metadata imports to exclude references to removed features.
- Streamlined the project for future development and improved maintainability by discarding legacy and unused code.

frontend/src/app/[locale]/(auth)/password-reset/page.tsx

@@ -0,0 +1,38 @@
+/**
+ * Password Reset Request Page
+ * Users enter their email to receive reset instructions
+ */
+
+import dynamic from 'next/dynamic';
+
+// Code-split PasswordResetRequestForm
+const PasswordResetRequestForm = dynamic(
+  /* istanbul ignore next - Next.js dynamic import, tested via component */
+  () =>
+    import('@/components/auth/PasswordResetRequestForm').then((mod) => ({
+      default: mod.PasswordResetRequestForm,
+    })),
+  {
+    loading: () => (
+      <div className="space-y-4">
+        <div className="animate-pulse h-10 bg-muted rounded" />
+        <div className="animate-pulse h-10 bg-primary/20 rounded" />
+      </div>
+    ),
+  }
+);
+
+export default function PasswordResetPage() {
+  return (
+    <div className="space-y-6">
+      <div className="text-center">
+        <h2 className="text-3xl font-bold tracking-tight">Reset your password</h2>
+        <p className="mt-2 text-muted-foreground">
+          We&apos;ll send you an email with instructions to reset your password
+        </p>
+      </div>
+
+      <PasswordResetRequestForm showLoginLink />
+    </div>
+  );
+}