Implement Phase 7: Contact Form 7 Integration (v0.7.0)

Add custom CF7 form tags for booking requests:
- [bnb_building_select] - Building filter dropdown
- [bnb_room_select] - Room selection with capacity data
- [bnb_date_checkin/checkout] - Date pickers with validation
- [bnb_guests] - Guest count with capacity limits

Features:
- Server-side validation for all fields
- Real-time AJAX availability checking
- Automatic price calculation display
- Booking creation on form submission
- Guest record creation/linking
- Custom mail tags for CF7 templates

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/Plugin.php

@@ -16,6 +16,7 @@ use Magdev\WpBnb\Booking\Availability;
 use Magdev\WpBnb\Booking\EmailNotifier;
 use Magdev\WpBnb\Frontend\Search;
 use Magdev\WpBnb\Frontend\Shortcodes;
+use Magdev\WpBnb\Integration\CF7;
 use Magdev\WpBnb\Frontend\Widgets\AvailabilityCalendar;
 use Magdev\WpBnb\Frontend\Widgets\BuildingRooms;
 use Magdev\WpBnb\Frontend\Widgets\SimilarRooms;
@@ -202,6 +203,11 @@ final class Plugin {
 
 		// Register widgets.
 		add_action( 'widgets_init', array( $this, 'register_widgets' ) );
+
+		// Initialize Contact Form 7 integration if CF7 is active.
+		if ( class_exists( 'WPCF7' ) ) {
+			CF7::init();
+		}
 	}
 
 	/**
@@ -362,6 +368,43 @@ final class Plugin {
 				),
 			)
 		);
+
+		// Load CF7 integration assets if CF7 is active.
+		if ( class_exists( 'WPCF7' ) ) {
+			wp_enqueue_style(
+				'wp-bnb-cf7',
+				WP_BNB_URL . 'assets/css/cf7-integration.css',
+				array( 'contact-form-7' ),
+				WP_BNB_VERSION
+			);
+
+			wp_enqueue_script(
+				'wp-bnb-cf7',
+				WP_BNB_URL . 'assets/js/cf7-integration.js',
+				array( 'contact-form-7' ),
+				WP_BNB_VERSION,
+				true
+			);
+
+			wp_localize_script(
+				'wp-bnb-cf7',
+				'wpBnbCF7',
+				array(
+					'ajaxUrl' => admin_url( 'admin-ajax.php' ),
+					'nonce'   => wp_create_nonce( 'wp_bnb_frontend_nonce' ),
+					'i18n'    => array(
+						'selectRoom'       => __( '-- Select Room --', 'wp-bnb' ),
+						'checking'         => __( 'Checking availability...', 'wp-bnb' ),
+						'available'        => __( 'Room is available!', 'wp-bnb' ),
+						'unavailable'      => __( 'Room is not available for these dates', 'wp-bnb' ),
+						'invalidDateRange' => __( 'Check-out must be after check-in', 'wp-bnb' ),
+						'capacityExceeded' => __( 'Maximum %d guests for this room', 'wp-bnb' ),
+						'estimatedTotal'   => __( 'Estimated Total', 'wp-bnb' ),
+						'nights'           => __( 'nights', 'wp-bnb' ),
+					),
+				)
+			);
+		}
 	}
 
 	/**