fix(07-01): add JavaScript redirect for registration form

- Added add_registration_redirect_script() method
- Listens for frmFormComplete event on registration form
- Redirects to /anbieter-dashboard/ after 1.5s delay
- Shows success message before redirect
- Replaces non-working frm_json_response filter approach

includes/class-formidable.php

@@ -162,8 +162,8 @@ class DDHH_JM_Formidable {
 		// Hook into Formidable form submission
 		add_action( 'frm_after_create_entry', array( __CLASS__, 'handle_registration_submission' ), 30, 2 );
 
-		// Add filter to set redirect URL in form response
-		add_filter( 'frm_json_response', array( __CLASS__, 'set_registration_redirect' ), 10, 1 );
+		// Add JavaScript redirect for registration form
+		add_action( 'wp_footer', array( __CLASS__, 'add_registration_redirect_script' ) );
 
 		// Hook into Formidable form validation for ownership check
 		add_filter( 'frm_validate_entry', array( __CLASS__, 'validate_job_ownership' ), 10, 2 );
@@ -266,33 +266,37 @@ class DDHH_JM_Formidable {
 	}
 
 	/**
-	 * Set redirect URL in form response for registration form
-	 *
-	 * @param array $response JSON response from form submission.
-	 * @return array Modified response.
+	 * Add JavaScript to redirect after successful registration
 	 */
-	public static function set_registration_redirect( $response ) {
-		// Only modify response if there's a form_id in the response
-		if ( ! isset( $response['form_id'] ) ) {
-			return $response;
+	public static function add_registration_redirect_script() {
+		// Only add on login page
+		if ( ! is_page( 'anbieter-login' ) ) {
+			return;
 		}
 
+		$form_id      = self::get_registration_form_id();
+		$redirect_url = home_url( '/anbieter-dashboard/' );
+
+		if ( ! $form_id ) {
+			return;
+		}
+		?>
+		<script type="text/javascript">
+		jQuery(document).ready(function($) {
+			// Listen for Formidable form submission success
+			$(document).on('frmFormComplete', function(event, form, response) {
 				// Check if this is the registration form
-		if ( $response['form_id'] != self::get_registration_form_id() ) {
-			return $response;
+				if (form.attr('id') === 'form_provider_registration' ||
+				    form.find('input[name="form_id"]').val() == '<?php echo esc_js( $form_id ); ?>') {
+					// Redirect after a short delay to show success message
+					setTimeout(function() {
+						window.location.href = '<?php echo esc_js( $redirect_url ); ?>';
+					}, 1500);
 				}
-
-		// Only redirect if the submission was successful (no errors)
-		if ( ! empty( $response['errors'] ) ) {
-			return $response;
-		}
-
-		error_log('DDHH Registration: Setting redirect in form response');
-
-		// Set redirect URL
-		$response['redirect_url'] = home_url( '/anbieter-dashboard/' );
-
-		return $response;
+			});
+		});
+		</script>
+		<?php
 	}
 
 	/**