feat(auth): enhance registration form validation and autocomplete accessibility

app/(auth)/register/page.tsx

@@ -1,6 +1,6 @@
 /**
  * @file app/(auth)/register/page.tsx
- * @description Client component providing a user registration interface utilizing the auth service.
+ * @description Client component providing a user registration interface with client-side validation, autocomplete, and ActionButton integration.
  */
 
 "use client";
@@ -14,8 +14,8 @@ import { Loader2, UserPlus } from "lucide-react";
 import { JSX } from "react/jsx-runtime";
 
 /**
- * Renders the registration page featuring a sign-up form, error feedback,
+ * Renders the registration page featuring a sign-up form, client-side validation,
- * and routing logic to the summary view upon successful account creation.
+ * error feedback, and routing logic to the summary view upon successful account creation.
  *
  * @returns {JSX.Element} The rendered registration page component.
  */
@@ -24,6 +24,15 @@ export default function RegisterPage(): JSX.Element {
   const [loading, setLoading] = useState(false);
   const router = useRouter();
 
+  /**
+   * Clears active error state when user modifies input fields.
+   */
+  const handleInputChange = () => {
+    if (error) {
+      setError(null);
+    }
+  };
+
   /**
    * Handles user registration form submission, validates form data via auth service,
    * and navigates to summary page on successful registration.
@@ -38,11 +47,18 @@ export default function RegisterPage(): JSX.Element {
   ): Promise<void> {
     event.preventDefault();
     setError(null);
-    setLoading(true);
 
     const formData = new FormData(event.currentTarget);
     const payload = Object.fromEntries(formData.entries());
 
+    // Client-side password matching check
+    if (payload.password !== payload.confirmPassword) {
+      setError("Passwords do not match.");
+      return;
+    }
+
+    setLoading(true);
+
     const result = await registerUser(payload);
 
     if (result.error) {
@@ -93,7 +109,11 @@ export default function RegisterPage(): JSX.Element {
           </div>
         )}
 
-        <form onSubmit={handleSubmit} className="space-y-4">
+        <form
+          onSubmit={handleSubmit}
+          onChange={handleInputChange}
+          className="space-y-4"
+        >
           <div className="grid grid-cols-2 gap-2.5">
             <div className="space-y-1">
               <label
@@ -108,6 +128,7 @@ export default function RegisterPage(): JSX.Element {
                 type="text"
                 placeholder="John"
                 maxLength={50}
+                autoComplete="given-name"
                 required
                 className="w-full px-3.5 py-2.5 text-sm rounded-lg border border-border bg-background/50 text-foreground placeholder:text-foreground-muted/50 focus:outline-none focus:border-primary focus:ring-1 focus:ring-primary transition-colors"
               />
@@ -126,6 +147,7 @@ export default function RegisterPage(): JSX.Element {
                 type="text"
                 placeholder="Doe"
                 maxLength={50}
+                autoComplete="family-name"
                 required
                 className="w-full px-3.5 py-2.5 text-sm rounded-lg border border-border bg-background/50 text-foreground placeholder:text-foreground-muted/50 focus:outline-none focus:border-primary focus:ring-1 focus:ring-primary transition-colors"
               />
@@ -145,6 +167,7 @@ export default function RegisterPage(): JSX.Element {
               type="email"
               placeholder="name@example.com"
               maxLength={255}
+              autoComplete="email"
               required
               className="w-full px-3.5 py-2.5 text-sm rounded-lg border border-border bg-background/50 text-foreground placeholder:text-foreground-muted/50 focus:outline-none focus:border-primary focus:ring-1 focus:ring-primary transition-colors"
             />
@@ -163,6 +186,7 @@ export default function RegisterPage(): JSX.Element {
               type="password"
               placeholder="••••••••••••"
               maxLength={72}
+              autoComplete="new-password"
               required
               className="w-full px-3.5 py-2.5 text-sm rounded-lg border border-border bg-background/50 text-foreground placeholder:text-foreground-muted/50 focus:outline-none focus:border-primary focus:ring-1 focus:ring-primary transition-colors"
             />
@@ -181,6 +205,7 @@ export default function RegisterPage(): JSX.Element {
               type="password"
               placeholder="••••••••••••"
               maxLength={72}
+              autoComplete="new-password"
               required
               className="w-full px-3.5 py-2.5 text-sm rounded-lg border border-border bg-background/50 text-foreground placeholder:text-foreground-muted/50 focus:outline-none focus:border-primary focus:ring-1 focus:ring-primary transition-colors"
             />