Adds custom validation messages and improves error feedback

Introduces custom validation messages for login and password fields to enhance clarity for users. Updates error feedback text to provide more specific guidance when authentication fails. Fixes formatting issue in the password error message in the view for consistency.

app/Http/Requests/LoginRequest.php

@@ -27,6 +27,14 @@
             ];
         }
 
+        public function messages()
+        {
+            return [
+                'login.required'    => 'User tidak boleh kosong',
+                'password.required' => 'Password tidak boleh kosong',
+            ];
+        }
+
         /**
          * Attempt to authenticate the request's credentials.
          *
@@ -50,7 +58,7 @@
                 if (!Auth::attempt($authData, $this->boolean('remember'))) {
                     RateLimiter::hit($this->throttleKey());
                     throw ValidationException::withMessages([
-                        'login' => trans('auth.failed'),
+                        'login' => 'Email/NIK atau password tidak sesuai.'
                     ]);
                 }
 
@@ -121,7 +129,7 @@
             // Authentication failed
             RateLimiter::hit($this->throttleKey());
             throw ValidationException::withMessages([
-                'login' => trans('auth.failed'),
+                'login' => 'Email/NIK atau password tidak sesuai.',
             ]);
         }