fix: prevent stepper markers from overflowing on mobile

Remove min-width: 44px and vertical centering override from .progress-dot
in the mobile breakpoint, which caused 9 dots to overflow the viewport
(9x44px = 396px > 374px available). Also add a 480px breakpoint with
smaller 28px dots for narrow phones like iPhone SE.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.planning/STATE.md

@@ -5,21 +5,43 @@
 See: .planning/PROJECT.md (updated 2026-01-16)
 
 **Core value:** Email format identical to legacy — office staff workflow depends on the exact HTML table structure.
-**Current focus:** Post-v1.0 bug fixes (manual testing discoveries)
+**Current focus:** Post-v1.0 polish — UI modernization, email format corrections, developer tooling
 
 ## Current Position
 
-Phase: 10 of 10 (Post-Release Fixes)
-Plan: 1 of 1 complete
-Status: Phase complete ✓
-Last activity: 2026-02-07 — Fixed form submit 404, handler timing, CPT meta box
+Phase: 10 of 10 (all roadmap phases complete)
+Status: Milestone v1.0 COMPLETE + post-milestone enhancements
+Last activity: 2026-02-13 — Test email admin page, comprehensive form fill button
 
 Progress: ██████████ 100% (11/11 plans)
 
+## Post-Milestone Work (after v1.0 completion)
+
+Work completed outside the GSD roadmap since milestone completion:
+
+### UI/UX Modernization (feature/ui-ux-modernization branch, merged)
+- Modernized wizard UX with smart rows, steppers, transitions, and edit links
+- Redesigned Step 8 (additional work) with flat list layout matching room steps
+- Added 3 switchable color palettes with Slate Blue & Amber as default
+- Polished form UX and step 9 summary translations
+- Fixed step navigation back-click bug, added shortcode lang attribute
+
+### Email Generator Rewrite (`60f82f1`)
+- Rewrote "Weitere Arbeiten" section as single 3-column table matching legacy format
+- Moved grand totals into last room's table instead of standalone section
+- Added Packarbeiten/Anfahrt sub-headers matching legacy HTML structure
+- Added get_field_key/get_field_value/get_field_anzahl helper methods
+
+### Developer Tooling (`f5ca452`)
+- New `Umzugsliste_Test_Email` class with comprehensive test data generator
+- Admin page (Moving List > Test Email) with inline email preview iframe + send button
+- Upgraded dev "Fill" button to "Fill All" — populates every field across all 9 form steps
+- Fixed getFieldVal crash when select has no selection (defensive coding)
+
 ## Performance Metrics
 
 **Velocity:**
-- Total plans completed: 11
+- Total roadmap plans completed: 11
 - Average duration: ~24 min per plan
 - Total execution time: ~4.5 hours
 
@@ -35,13 +57,14 @@ Progress: ██████████ 100% (11/11 plans)
 | 6 | 1 | Form handler, email generator, wp_mail() integration |
 | 7 | 1 | Captcha verification and inline validation |
 | 8 | 2/2 | Bug fixes & legacy parity (gap closure) |
-| 9 | 2/2 | Internationalization (gap closure) ✓ |
-| 10 | 1/1 | Post-release fixes (manual testing bugs) ✓ |
+| 9 | 2/2 | Internationalization (gap closure) |
+| 10 | 1/1 | Post-release fixes (manual testing bugs) |
 
 **Overall Trend:**
 - Phases 1-7 completed successfully
 - Milestone audit found 4 gaps requiring phases 8-9
 - Manual testing found 3 runtime bugs requiring phase 10
+- Post-milestone: UI modernization, email format correction, dev tooling
 - No blockers encountered
 
 ## Accumulated Context
@@ -72,6 +95,10 @@ Recent decisions affecting current work:
 | 10 | Rename day/month/year fields to umzug_day/umzug_month/umzug_year | WordPress reserved query vars caused 404 on form POST |
 | 10 | Move handler instantiation to init_hooks() | init callback too late for handler's own init hook |
 | 10 | Add CPT submission details meta box | No way to view stored submission data in admin |
+| Post | Weitere Arbeiten as single 3-column table | Matches legacy format exactly — one table with sub-section headers |
+| Post | Grand totals in last room's table | Legacy places grand totals as final rows of last room table |
+| Post | Test email admin page with iframe preview | Instant verification of email output without filling the full form |
+| Post | Fill All dev button (WP_DEBUG only) | Populates every form field for rapid end-to-end testing |
 
 ### Deferred Issues
 
@@ -85,7 +112,7 @@ None.
 
 ## Session Continuity
 
-Last session: 2026-02-07
-Stopped at: Documented phase 10 post-release fixes - PHASE 10 COMPLETE ✓
+Last session: 2026-02-13
+Stopped at: Test email admin page + Fill All button complete and committed
 Resume file: None
-Next up: All phases complete! Plugin shipped and working end-to-end.
+Next up: All roadmap phases complete. Plugin is functional and polished. Available for new milestone or ad-hoc work.

assets/css/form.css

@@ -1121,11 +1121,7 @@ body.umzugsliste-standalone:has(.palette-c) {
 	}
 
 	.progress-dot {
-		min-width: 44px;
 		min-height: 44px;
-		display: flex;
-		align-items: center;
-		justify-content: center;
 	}
 
 	.dot-label {
@@ -1156,3 +1152,19 @@ body.umzugsliste-standalone:has(.palette-c) {
 		display: block;
 	}
 }
+
+@media (max-width: 480px) {
+	.progress-bar {
+		padding: 0 4px;
+	}
+
+	.dot-number {
+		width: 28px;
+		height: 28px;
+		font-size: 0.65rem;
+	}
+
+	.progress-track {
+		top: 14px;
+	}
+}

assets/js/form.js

@@ -409,7 +409,7 @@
 	function getFieldVal(name) {
 		var el = qs('[name="' + name + '"]');
 		if (!el) return '';
-		if (el.tagName === 'SELECT') return el.options[el.selectedIndex].value;
+		if (el.tagName === 'SELECT') return el.selectedIndex >= 0 ? el.options[el.selectedIndex].value : '';
 		return el.value.trim();
 	}
 

includes/class-admin-menu.php

@@ -69,6 +69,16 @@ class Umzugsliste_Admin_Menu {
 			array( $this, 'settings_page' )   // Callback
 		);
 
+		// Add Test Email submenu
+		add_submenu_page(
+			'umzugsliste',
+			'Test Email',
+			'Test Email',
+			'manage_options',
+			'umzugsliste-test-email',
+			array( Umzugsliste_Test_Email::get_instance(), 'render_admin_page' )
+		);
+
 		// Remove duplicate top-level menu item
 		remove_submenu_page( 'umzugsliste', 'umzugsliste' );
 	}

includes/class-email-generator.php

@@ -35,20 +35,17 @@ class Umzugsliste_Email_Generator {
 		// Customer info
 		$content .= self::generate_customer_info_section( $data );
 
-		// All rooms
+		// All rooms with grand totals in last room's table
 		$content .= self::generate_all_rooms( $data );
 
-		// Additional work sections
-		$content .= self::generate_additional_work_sections( $data );
+		// Weitere Arbeiten (single 3-column table)
+		$content .= self::generate_weitere_arbeiten( $data );
 
 		// Sonstiges
 		if ( ! empty( $data['sonstiges'] ) ) {
 			$content .= self::generate_sonstiges_section( $data['sonstiges'] );
 		}
 
-		// Grand totals
-		$content .= self::generate_grand_totals( $data );
-
 		// Wrap in HTML document
 		return self::wrap_html( $content );
 	}
@@ -135,7 +132,7 @@ class Umzugsliste_Email_Generator {
 	}
 
 	/**
-	 * Generate all room sections
+	 * Generate all room sections with grand totals in last room's table
 	 *
 	 * @param array $data Form data
 	 * @return string HTML
@@ -144,22 +141,66 @@ class Umzugsliste_Email_Generator {
 		$html = '';
 		$rooms = Umzugsliste_Furniture_Data::get_rooms();
 
+		// Collect rooms that have items
+		$rooms_with_items = array();
 		foreach ( $rooms as $room_key => $room_label ) {
-			// Get post array name for this room
 			$post_array_name = ucfirst( $room_key );
 			if ( 'kueche_esszimmer' === $room_key ) {
 				$post_array_name = 'Kueche_Esszimmer';
 			}
 
-			// Get room data from submission
 			$room_data = $data[ $post_array_name ] ?? array();
-
-			// Only include room if it has items with quantities
 			if ( self::has_items_with_quantities( $room_data ) ) {
-				$html .= self::generate_room_section( $room_key, $room_label, $room_data );
+				$rooms_with_items[ $room_key ] = array(
+					'label' => $room_label,
+					'data'  => $room_data,
+				);
 			}
 		}
 
+		if ( empty( $rooms_with_items ) ) {
+			return '';
+		}
+
+		$room_keys = array_keys( $rooms_with_items );
+		$last_room_key = end( $room_keys );
+
+		// Grand totals accumulators
+		$grand_total_quantity = 0;
+		$grand_total_cbm = 0;
+
+		foreach ( $rooms_with_items as $room_key => $room_info ) {
+			$is_last = ( $room_key === $last_room_key );
+			$html .= self::generate_room_section(
+				$room_key,
+				$room_info['label'],
+				$room_info['data'],
+				$is_last
+			);
+
+			// Accumulate grand totals
+			foreach ( $room_info['data'] as $key => $value ) {
+				if ( substr( $key, 0, 1 ) === 'v' && ! empty( $value ) && floatval( $value ) > 0 ) {
+					$item_name = substr( $key, 1 );
+					$quantity = floatval( str_replace( ',', '.', trim( $value ) ) );
+					$cbm = isset( $room_info['data'][ 'q' . $item_name ] ) ? floatval( $room_info['data'][ 'q' . $item_name ] ) : 0;
+					$grand_total_quantity += $quantity;
+					$grand_total_cbm += ( $quantity * $cbm );
+				}
+			}
+		}
+
+		// Grand totals row inside last room's table
+		$grand_total_display = str_replace( '.', ',', number_format( $grand_total_cbm, 2, '.', '' ) );
+
+		$html .= "<tr><th>&nbsp;</th></tr>
+			<tr>
+				<th bgcolor='CCCCCC' align='right'>" . $grand_total_quantity . "</th>
+				<th bgcolor='CCCCCC' align='left'>Gesamtsummen</th>
+				<th bgcolor='CCCCCC' colspan='2' align='right'>" . esc_html( $grand_total_display ) . "</th>
+				<th bgcolor='CCCCCC'>&nbsp;</th>
+			</tr></tbody></table></div></div>";
+
 		return $html;
 	}
 
@@ -184,9 +225,10 @@ class Umzugsliste_Email_Generator {
 	 * @param string $room_key Room key
 	 * @param string $room_label Room label
 	 * @param array  $room_data Room submission data
+	 * @param bool   $is_last Whether this is the last room (keeps table open for grand totals)
 	 * @return string HTML
 	 */
-	private static function generate_room_section( $room_key, $room_label, $room_data ) {
+	private static function generate_room_section( $room_key, $room_label, $room_data, $is_last = false ) {
 		$html = "<div class='row'>
 			<div class='large-12 columns' style='margin: 10px 0px; overflow-x: auto;'>
 				<table width='100%'>
@@ -212,9 +254,6 @@ class Umzugsliste_Email_Generator {
 		$room_total_quantity = 0;
 		$room_total_cbm = 0;
 
-		// Process items in groups of v, q, m
-		$processed_items = array();
-
 		foreach ( $room_data as $key => $value ) {
 			if ( substr( $key, 0, 1 ) === 'v' ) {
 				$item_name = substr( $key, 1 );
@@ -238,8 +277,6 @@ class Umzugsliste_Email_Generator {
 					$html .= "<td align='right'>" . esc_html( $total_display ) . '</td>';
 					$html .= '<td>&nbsp;' . esc_html( $montage ) . '</td>';
 					$html .= '</tr>';
-
-					$processed_items[] = $item_name;
 				}
 			}
 		}
@@ -254,165 +291,353 @@ class Umzugsliste_Email_Generator {
 			<th bgcolor='CCCCCC'>&nbsp;</th>
 		</tr>";
 
+		// Only close table if NOT the last room (last room stays open for grand totals)
+		if ( ! $is_last ) {
+			$html .= '</tbody></table></div></div>';
+		}
+
+		return $html;
+	}
+
+	/**
+	 * Get field key matching how form handler stores it
+	 *
+	 * @param array $field Field definition
+	 * @return string Field key
+	 */
+	private static function get_field_key( $field ) {
+		if ( ! empty( $field['key'] ) ) {
+			return sanitize_key( $field['key'] );
+		}
+		return sanitize_title( $field['name'] );
+	}
+
+	/**
+	 * Get field value from submitted data
+	 *
+	 * @param array $section_data Submitted data for section
+	 * @param array $field Field definition
+	 * @return string Field value
+	 */
+	private static function get_field_value( $section_data, $field ) {
+		$key = self::get_field_key( $field );
+		return $section_data[ $key ] ?? '';
+	}
+
+	/**
+	 * Get _anzahl value for checkbox_anzahl fields
+	 *
+	 * @param array $section_data Submitted data for section
+	 * @param array $field Field definition
+	 * @return string Anzahl value
+	 */
+	private static function get_field_anzahl( $section_data, $field ) {
+		$key = self::get_field_key( $field );
+		return $section_data[ $key . '_anzahl' ] ?? '';
+	}
+
+	/**
+	 * Generate Weitere Arbeiten section as single 3-column table
+	 *
+	 * @param array $data Form data
+	 * @return string HTML
+	 */
+	private static function generate_weitere_arbeiten( $data ) {
+		$additional_data = $data['additional_work'] ?? array();
+		$sections = Umzugsliste_Furniture_Data::get_additional_work();
+
+		$html = "<div class='row'>
+			<div class='large-12 columns' style='margin: 10px 0px; overflow-x: auto;'>
+				<table width='100%'>
+					<thead>
+						<tr>
+							<th align='left' bgcolor='#CCCCCC'>Weitere Arbeiten (bitte ankreuzen)</th>
+							<th bgcolor='#CCCCCC'>&nbsp;</th>
+							<th bgcolor='#CCCCCC'>&nbsp;</th>
+						</tr>
+					</thead>
+					<tbody>";
+
+		$html .= self::generate_montage_rows( $additional_data['montage'] ?? array(), $sections['montage'] );
+		$html .= self::generate_schrank_rows( $additional_data['schrank'] ?? array(), $sections['schrank'] );
+		$html .= self::generate_elektriker_rows( $additional_data['elektriker'] ?? array(), $sections['elektriker'] );
+		$html .= self::generate_duebelarbeiten_rows( $additional_data['duebelarbeiten'] ?? array(), $sections['duebelarbeiten'] );
+		$html .= self::generate_packarbeiten_rows( $additional_data['packarbeiten'] ?? array(), $sections['packarbeiten'] );
+		$html .= self::generate_anfahrt_rows( $additional_data['anfahrt'] ?? array(), $sections['anfahrt'] );
+
+		// anfahrt_rows closes the table
+
+		return $html;
+	}
+
+	/**
+	 * Generate Montagearbeiten rows
+	 *
+	 * @param array $section_data Submitted data
+	 * @param array $section_def Section field definitions
+	 * @return string HTML rows
+	 */
+	private static function generate_montage_rows( $section_data, $section_def ) {
+		$html = "<tr>
+			<th bgcolor='#CCCCCC' colspan='3'>Montagearbeiten</th>
+		</tr>";
+
+		foreach ( $section_def['fields'] as $field ) {
+			$value = self::get_field_value( $section_data, $field );
+			$checked = ( 'ja' === $value ) ? 'X' : '&nbsp;';
+
+			$html .= '<tr>';
+			$html .= '<td>' . esc_html( $field['name'] ) . '</td>';
+			$html .= '<td>' . $checked . '</td>';
+			$html .= '<td>&nbsp;</td>';
+			$html .= '</tr>';
+		}
+
+		return $html;
+	}
+
+	/**
+	 * Generate Schrank rows with Abbau/Aufbau columns
+	 *
+	 * @param array $section_data Submitted data
+	 * @param array $section_def Section field definitions
+	 * @return string HTML rows
+	 */
+	private static function generate_schrank_rows( $section_data, $section_def ) {
+		$html = "<tr>
+			<th bgcolor='#CCCCCC'>Schrank</th>
+			<th bgcolor='#CCCCCC'>Abbau</th>
+			<th bgcolor='#CCCCCC'>Aufbau</th>
+		</tr>";
+
+		foreach ( $section_def['fields'] as $field ) {
+			$value = self::get_field_value( $section_data, $field );
+
+			$abbau = '&nbsp;';
+			$aufbau = '&nbsp;';
+
+			if ( 'Abbau' === $value ) {
+				$abbau = 'X';
+			} elseif ( 'Aufbau' === $value ) {
+				$aufbau = 'X';
+			} elseif ( 'Beides' === $value ) {
+				$abbau = 'X';
+				$aufbau = 'X';
+			}
+
+			$html .= '<tr>';
+			$html .= '<td>' . esc_html( $field['name'] ) . '</td>';
+			$html .= '<td>' . $abbau . '</td>';
+			$html .= '<td>' . $aufbau . '</td>';
+			$html .= '</tr>';
+		}
+
+		return $html;
+	}
+
+	/**
+	 * Generate Elektriker/Installateur rows
+	 *
+	 * @param array $section_data Submitted data
+	 * @param array $section_def Section field definitions
+	 * @return string HTML rows
+	 */
+	private static function generate_elektriker_rows( $section_data, $section_def ) {
+		$html = "<tr>
+			<th bgcolor='#CCCCCC'>Elektriker/Installateur</th>
+			<th bgcolor='#CCCCCC'>&nbsp;</th>
+			<th bgcolor='#CCCCCC'>Anzahl</th>
+		</tr>";
+
+		foreach ( $section_def['fields'] as $field ) {
+			$value = self::get_field_value( $section_data, $field );
+			$anzahl = self::get_field_anzahl( $section_data, $field );
+
+			$checked = ( 'ja' === $value ) ? 'X' : '&nbsp;';
+			$anzahl_display = ! empty( $anzahl ) ? esc_html( $anzahl ) : '&nbsp;';
+
+			$html .= '<tr>';
+			$html .= '<td>' . esc_html( $field['name'] ) . '</td>';
+			$html .= '<td>' . $checked . '</td>';
+			$html .= '<td>' . $anzahl_display . '</td>';
+			$html .= '</tr>';
+		}
+
+		return $html;
+	}
+
+	/**
+	 * Generate Dübelarbeiten rows
+	 *
+	 * @param array $section_data Submitted data
+	 * @param array $section_def Section field definitions
+	 * @return string HTML rows
+	 */
+	private static function generate_duebelarbeiten_rows( $section_data, $section_def ) {
+		$html = "<tr>
+			<th bgcolor='#CCCCCC'>D&uuml;belarbeiten</th>
+			<th bgcolor='#CCCCCC'>&nbsp;</th>
+			<th bgcolor='#CCCCCC'>Anzahl</th>
+		</tr>";
+
+		foreach ( $section_def['fields'] as $field ) {
+			$value = self::get_field_value( $section_data, $field );
+			$anzahl = self::get_field_anzahl( $section_data, $field );
+
+			$checked = ( 'ja' === $value ) ? 'X' : '&nbsp;';
+			$anzahl_display = ! empty( $anzahl ) ? esc_html( $anzahl ) : '&nbsp;';
+
+			$html .= '<tr>';
+			$html .= '<td>' . esc_html( $field['name'] ) . '</td>';
+			$html .= '<td>' . $checked . '</td>';
+			$html .= '<td>' . $anzahl_display . '</td>';
+			$html .= '</tr>';
+		}
+
+		return $html;
+	}
+
+	/**
+	 * Generate Packarbeiten rows with sub-headers
+	 *
+	 * @param array $section_data Submitted data
+	 * @param array $section_def Section field definitions
+	 * @return string HTML rows
+	 */
+	private static function generate_packarbeiten_rows( $section_data, $section_def ) {
+		$fields = $section_def['fields'];
+
+		// Packarbeiten header + first 2 checkbox rows
+		$html = "<tr>
+			<th bgcolor='#CCCCCC' colspan='3'>Packarbeiten</th>
+		</tr>";
+
+		for ( $i = 0; $i < 2 && $i < count( $fields ); $i++ ) {
+			$value = self::get_field_value( $section_data, $fields[ $i ] );
+			$checked = ( 'ja' === $value ) ? 'X' : '&nbsp;';
+
+			$html .= '<tr>';
+			$html .= '<td>' . esc_html( $fields[ $i ]['name'] ) . '</td>';
+			$html .= '<td>' . $checked . '</td>';
+			$html .= '<td>&nbsp;</td>';
+			$html .= '</tr>';
+		}
+
+		// "Wir haben spezielle Packwünsche:" sub-header + next 2 checkbox rows
+		$html .= "<tr>
+			<th bgcolor='#CCCCCC' colspan='3'>Wir haben spezielle Packw&uuml;nsche:</th>
+		</tr>";
+
+		for ( $i = 2; $i < 4 && $i < count( $fields ); $i++ ) {
+			$value = self::get_field_value( $section_data, $fields[ $i ] );
+			$checked = ( 'ja' === $value ) ? 'X' : '&nbsp;';
+
+			$html .= '<tr>';
+			$html .= '<td>' . esc_html( $fields[ $i ]['name'] ) . '</td>';
+			$html .= '<td>' . $checked . '</td>';
+			$html .= '<td>&nbsp;</td>';
+			$html .= '</tr>';
+		}
+
+		// "Packmaterial" sub-header + 2 text quantity rows
+		$html .= "<tr>
+			<th bgcolor='#CCCCCC' colspan='3'>Packmaterial</th>
+		</tr>";
+
+		for ( $i = 4; $i < 6 && $i < count( $fields ); $i++ ) {
+			$value = self::get_field_value( $section_data, $fields[ $i ] );
+			$value_display = ! empty( $value ) ? esc_html( $value ) : '&nbsp;';
+
+			$html .= '<tr>';
+			$html .= '<td>' . esc_html( $fields[ $i ]['name'] ) . '</td>';
+			$html .= '<td>&nbsp;</td>';
+			$html .= '<td>' . $value_display . '</td>';
+			$html .= '</tr>';
+		}
+
+		return $html;
+	}
+
+	/**
+	 * Generate Anfahrt rows with nested sub-headers (also closes the table)
+	 *
+	 * @param array $section_data Submitted data
+	 * @param array $section_def Section field definitions
+	 * @return string HTML rows including table close
+	 */
+	private static function generate_anfahrt_rows( $section_data, $section_def ) {
+		$fields = $section_def['fields'];
+
+		$html = "<tr>
+			<th bgcolor='#CCCCCC' colspan='3'>Anfahrt</th>
+		</tr>";
+
+		// "LKW kann direkt vor den Eingang fahren" sub-header
+		$html .= "<tr>
+			<th bgcolor='#CCCCCC' colspan='3'>LKW kann direkt vor den Eingang fahren</th>
+		</tr>";
+
+		// Beladestelle (field index 0)
+		$value = self::get_field_value( $section_data, $fields[0] );
+		$checked = ( 'ja' === $value ) ? 'X' : '&nbsp;';
+		$html .= '<tr><td>Beladestelle</td><td>' . $checked . '</td><td>&nbsp;</td></tr>';
+
+		// Entladestelle (field index 1)
+		$value = self::get_field_value( $section_data, $fields[1] );
+		$checked = ( 'ja' === $value ) ? 'X' : '&nbsp;';
+		$html .= '<tr><td>Entladestelle</td><td>' . $checked . '</td><td>&nbsp;</td></tr>';
+
+		// "Parkverbotsschilder aufstellen" sub-header
+		$html .= "<tr>
+			<th bgcolor='#CCCCCC' colspan='3'>Parkverbotsschilder aufstellen</th>
+		</tr>";
+
+		// Beladestelle (field index 2)
+		$value = self::get_field_value( $section_data, $fields[2] );
+		$checked = ( 'ja' === $value ) ? 'X' : '&nbsp;';
+		$html .= '<tr><td>Beladestelle</td><td>' . $checked . '</td><td>&nbsp;</td></tr>';
+
+		// Entladestelle (field index 3)
+		$value = self::get_field_value( $section_data, $fields[3] );
+		$checked = ( 'ja' === $value ) ? 'X' : '&nbsp;';
+		$html .= '<tr><td>Entladestelle</td><td>' . $checked . '</td><td>&nbsp;</td></tr>';
+
+		// "Die Anfahrt ist eng bzw. nicht möglich" sub-header
+		$html .= "<tr>
+			<th bgcolor='#CCCCCC' colspan='3'>Die Anfahrt ist eng bzw. nicht m&ouml;glich</th>
+		</tr>";
+
+		// Beladestelle (field index 4)
+		$value = self::get_field_value( $section_data, $fields[4] );
+		$checked = ( 'ja' === $value ) ? 'X' : '&nbsp;';
+		$html .= '<tr><td>Beladestelle</td><td>' . $checked . '</td><td>&nbsp;</td></tr>';
+
+		// Entladestelle (field index 5)
+		$value = self::get_field_value( $section_data, $fields[5] );
+		$checked = ( 'ja' === $value ) ? 'X' : '&nbsp;';
+		$html .= '<tr><td>Entladestelle</td><td>' . $checked . '</td><td>&nbsp;</td></tr>';
+
+		// "Abtrageweg" sub-header
+		$html .= "<tr>
+			<th bgcolor='#CCCCCC' colspan='3'>Abtrageweg</th>
+		</tr>";
+
+		// Beladestelle distance (field index 6) - value in col3
+		$value = self::get_field_value( $section_data, $fields[6] );
+		$value_display = ! empty( $value ) ? esc_html( $value ) : '&nbsp;';
+		$html .= '<tr><td>Beladestelle Wegstrecke Haus-LKW in Meter</td><td>&nbsp;</td><td>' . $value_display . '</td></tr>';
+
+		// Entladestelle distance (field index 7) - value in col3, also closes table
+		$value = self::get_field_value( $section_data, $fields[7] );
+		$value_display = ! empty( $value ) ? esc_html( $value ) : '&nbsp;';
+		$html .= '<tr><td>Entladestelle Wegstrecke LKW-Haus in Meter</td><td>&nbsp;</td><td>' . $value_display . '</td></tr>';
+
+		// Close the Weitere Arbeiten table
 		$html .= '</tbody></table></div></div>';
 
 		return $html;
 	}
 
-	/**
-	 * Generate grand totals section
-	 *
-	 * @param array $data Form data
-	 * @return string HTML
-	 */
-	private static function generate_grand_totals( $data ) {
-		$grand_total_quantity = 0;
-		$grand_total_cbm = 0;
-
-		$rooms = Umzugsliste_Furniture_Data::get_rooms();
-
-		foreach ( $rooms as $room_key => $room_label ) {
-			$post_array_name = ucfirst( $room_key );
-			if ( 'kueche_esszimmer' === $room_key ) {
-				$post_array_name = 'Kueche_Esszimmer';
-			}
-
-			$room_data = $data[ $post_array_name ] ?? array();
-
-			foreach ( $room_data as $key => $value ) {
-				if ( substr( $key, 0, 1 ) === 'v' && ! empty( $value ) && floatval( $value ) > 0 ) {
-					$item_name = substr( $key, 1 );
-					$quantity = floatval( str_replace( ',', '.', trim( $value ) ) );
-					$cbm = isset( $room_data[ 'q' . $item_name ] ) ? floatval( $room_data[ 'q' . $item_name ] ) : 0;
-
-					$grand_total_quantity += $quantity;
-					$grand_total_cbm += ( $quantity * $cbm );
-				}
-			}
-		}
-
-		$grand_total_display = str_replace( '.', ',', number_format( $grand_total_cbm, 2, '.', '' ) );
-
-		return "<tr><th>&nbsp;</th></tr>
-			<tr>
-				<th bgcolor='CCCCCC' align='right'>" . $grand_total_quantity . "</th>
-				<th bgcolor='CCCCCC' align='left'>Gesamtsummen</th>
-				<th bgcolor='CCCCCC' colspan='2' align='right'>" . esc_html( $grand_total_display ) . "</th>
-				<th bgcolor='CCCCCC'>&nbsp;</th>
-			</tr></tbody></table></div></div>";
-	}
-
-	/**
-	 * Generate additional work sections
-	 *
-	 * @param array $data Form data
-	 * @return string HTML
-	 */
-	private static function generate_additional_work_sections( $data ) {
-		$html = '';
-		$sections = Umzugsliste_Furniture_Data::get_additional_work();
-
-		foreach ( $sections as $section_key => $section_data ) {
-			// Only include section if it has data
-			if ( self::has_additional_work_data( $data, $section_key ) ) {
-				$html .= "<div class='row'>
-					<div class='large-12 columns' style='margin: 10px 0px; overflow-x: auto;'>
-						<table width='100%'>
-							<thead>
-								<tr>
-									<th align='left' bgcolor='#CCCCCC' colspan='2'>" . esc_html( $section_data['label'] ) . "</th>
-								</tr>
-							</thead>
-							<tbody>";
-
-				$section_submitted_data = $data['additional_work'][ $section_key ] ?? array();
-
-				foreach ( $section_data['fields'] as $field ) {
-					// Get field key
-					$field_key = ! empty( $field['key'] ) ? $field['key'] : sanitize_title( $field['name'] );
-
-					// Get field value
-					$field_value = $section_submitted_data[ $field_key ] ?? '';
-
-					// Render based on field type
-					switch ( $field['type'] ) {
-						case 'checkbox':
-							if ( 'ja' === $field_value ) {
-								$html .= '<tr>';
-								$html .= '<td>' . esc_html( $field['name'] ) . '</td>';
-								$html .= '<td>Ja</td>';
-								$html .= '</tr>';
-							}
-							break;
-
-						case 'abbau_aufbau':
-							if ( ! empty( $field_value ) ) {
-								$html .= '<tr>';
-								$html .= '<td>' . esc_html( $field['name'] ) . '</td>';
-								$html .= '<td>' . esc_html( $field_value ) . '</td>';
-								$html .= '</tr>';
-							}
-							break;
-
-						case 'checkbox_anzahl':
-							if ( 'ja' === $field_value ) {
-								$anzahl_value = $section_submitted_data[ $field_key . '_anzahl' ] ?? '';
-								$display_value = 'Ja';
-								if ( ! empty( $anzahl_value ) ) {
-									$display_value .= ' (Anzahl: ' . esc_html( $anzahl_value ) . ')';
-								}
-								$html .= '<tr>';
-								$html .= '<td>' . esc_html( $field['name'] ) . '</td>';
-								$html .= '<td>' . $display_value . '</td>';
-								$html .= '</tr>';
-							}
-							break;
-
-						case 'text':
-							if ( ! empty( $field_value ) ) {
-								$html .= '<tr>';
-								$html .= '<td>' . esc_html( $field['name'] ) . '</td>';
-								$html .= '<td>' . esc_html( $field_value ) . '</td>';
-								$html .= '</tr>';
-							}
-							break;
-					}
-				}
-
-				$html .= '</tbody></table></div></div>';
-			}
-		}
-
-		return $html;
-	}
-
-	/**
-	 * Check if section has any data
-	 *
-	 * @param array  $data Form data
-	 * @param string $section_key Section key
-	 * @return bool True if has data
-	 */
-	private static function has_additional_work_data( $data, $section_key ) {
-		if ( empty( $data['additional_work'][ $section_key ] ) ) {
-			return false;
-		}
-
-		$section_data = $data['additional_work'][ $section_key ];
-		if ( ! is_array( $section_data ) ) {
-			return false;
-		}
-
-		// Check if any value is non-empty
-		foreach ( $section_data as $value ) {
-			if ( ! empty( trim( $value ) ) ) {
-				return true;
-			}
-		}
-
-		return false;
-	}
-
 	/**
 	 * Generate Sonstiges section
 	 *
@@ -448,7 +673,7 @@ class Umzugsliste_Email_Generator {
 		return "<!DOCTYPE html PUBLIC '-//W3C//DTD HTML 4.0 Transitional//EN'>
 		<html>
 		<head>
-			<title>Siegel Umzüge - Internetanfrage</title>
+			<title>Siegel-Umzug</title>
 			<meta http-equiv='Content-Type' content='text/html; charset=UTF-8'>
 		</head>
 		<body>" . $content . "</body>

includes/class-form-renderer.php

@@ -206,20 +206,99 @@ class Umzugsliste_Form_Renderer {
 				<p class="required-note"><?php echo esc_html__( '* Required fields', 'siegel-umzugsliste' ); ?></p>
 			</div>
 			<?php if ( defined( 'WP_DEBUG' ) && WP_DEBUG ) : ?>
-				<button type="button" id="dev-autofill" class="dev-autofill-btn">&#9881; Fill</button>
+				<button type="button" id="dev-autofill" class="dev-autofill-btn">&#9881; Fill All</button>
 				<script>
 				document.getElementById('dev-autofill').addEventListener('click', function() {
-					var fields = {
-						'bName':'Max Mustermann','bStrasse':'Musterstr. 12',
-						'bort':'10115 Berlin','bTelefon':'030 12345678',
-						'eName':'Erika Musterfrau','eStrasse':'Zielweg 5',
-						'eort':'80331 München','info[eE-Mail]':'test@example.com'
-					};
-					for (var n in fields) {
-						var el = document.querySelector('[name="'+n+'"]');
-						if (el) { el.value = fields[n]; el.dispatchEvent(new Event('input',{bubbles:true})); }
+					function setField(name, val) {
+						var el = document.querySelector('[name="'+name+'"]');
+						if (el) { el.value = val; el.dispatchEvent(new Event('input',{bubbles:true})); }
 					}
-					document.getElementById('wizard-next').click();
+					function setRadio(name, val) {
+						var el = document.querySelector('[name="'+name+'"][value="'+val+'"]');
+						if (el) el.checked = true;
+					}
+
+					/* Step 1: Date — option values are plain numbers (no zero-pad) */
+					var d = new Date();
+					setField('umzug_day', String(d.getDate()));
+					setField('umzug_month', String(d.getMonth()+1));
+					setField('umzug_year', String(d.getFullYear()));
+
+					/* Step 1: Addresses */
+					var addr = {
+						'bName':'Max Mustermann','bStrasse':'Musterstraße 42',
+						'bort':'65197 Wiesbaden','bTelefon':'0611 123456',
+						'eName':'Erika Musterfrau','eStrasse':'Beispielweg 7',
+						'eort':'55116 Mainz','eTelefon':'06131 654321',
+						'info[bGeschoss]':'2. OG','info[eGeschoss]':'EG',
+						'info[bTelefax]':'0611 123457','info[eTelefax]':'06131 654322',
+						'info[bMobil]':'0170 1234567','info[eMobil]':'0171 7654321',
+						'info[eE-Mail]':'test@example.com'
+					};
+					for (var n in addr) setField(n, addr[n]);
+					setRadio('info[bLift]','ja');
+
+					/* Steps 2-7: Furniture — ALL items in every room */
+					document.querySelectorAll('.furniture-list').forEach(function(list) {
+						var items = list.querySelectorAll('.furniture-item');
+						for (var i = 0; i < items.length; i++) {
+							var qty = (i % 3) + 1;
+							var inp = items[i].querySelector('.quantity-input');
+							if (inp) {
+								inp.value = String(qty);
+								inp.classList.add('has-value');
+								items[i].classList.add('has-quantity');
+								inp.dispatchEvent(new Event('input',{bubbles:true}));
+							}
+							if (i % 2 === 0) {
+								var mj = items[i].querySelector('.montage-toggle input[value="ja"]');
+								if (mj) mj.checked = true;
+							}
+						}
+					});
+
+					/* Step 8: Additional work — Montage checkboxes */
+					document.querySelectorAll('[data-section="montage"] input[type="checkbox"]').forEach(function(cb) { cb.checked = true; });
+
+					/* Schrank radios — cycle Abbau/Aufbau/Beides */
+					var abbauVals = ['Abbau','Aufbau','Beides'], ai = 0;
+					document.querySelectorAll('[data-section="schrank"] .additional-field-abbau').forEach(function(f) {
+						var r = f.querySelector('input[value="'+abbauVals[ai%3]+'"]');
+						if (r) r.checked = true;
+						ai++;
+					});
+
+					/* Elektriker — check + anzahl */
+					var ez = 1;
+					document.querySelectorAll('[data-section="elektriker"] .additional-field-qty').forEach(function(f) {
+						var cb = f.querySelector('input[type="checkbox"]'); if (cb) cb.checked = true;
+						var q = f.querySelector('.qty-small'); if (q) q.value = String(ez++);
+					});
+
+					/* Dübelarbeiten — check + anzahl */
+					var dz = 2;
+					document.querySelectorAll('[data-section="duebelarbeiten"] .additional-field-qty').forEach(function(f) {
+						var cb = f.querySelector('input[type="checkbox"]'); if (cb) cb.checked = true;
+						var q = f.querySelector('.qty-small'); if (q) { q.value = String(dz); dz += 2; }
+					});
+
+					/* Packarbeiten — all checkboxes + text quantities */
+					document.querySelectorAll('[data-section="packarbeiten"] input[type="checkbox"]').forEach(function(cb) { cb.checked = true; });
+					var pv = [25, 5], pi = 0;
+					document.querySelectorAll('[data-section="packarbeiten"] .additional-field-text .qty-small').forEach(function(inp) {
+						inp.value = String(pv[pi] || 5); pi++;
+					});
+
+					/* Anfahrt — all checkboxes + distances */
+					document.querySelectorAll('[data-section="anfahrt"] input[type="checkbox"]').forEach(function(cb) { cb.checked = true; });
+					var av = [15, 25], avi = 0;
+					document.querySelectorAll('[data-section="anfahrt"] .additional-field-text .qty-small').forEach(function(inp) {
+						inp.value = String(av[avi] || 25); avi++;
+					});
+
+					/* Sonstiges */
+					var s = document.querySelector('[name="sonstiges"]');
+					if (s) s.value = 'Bitte vorsichtig mit dem antiken Schrank im Wohnzimmer.\nDas Klavier muss besonders geschützt werden.';
 				});
 				</script>
 			<?php endif; ?>
@@ -485,7 +564,7 @@ class Umzugsliste_Form_Renderer {
 						<input type="checkbox" name="<?php echo esc_attr( $field_name ); ?>" value="ja">
 						<?php echo esc_html( $field['name'] ); ?>
 					</label>
-					<input type="text" name="<?php echo esc_attr( $field_name . '_anzahl' ); ?>" class="qty-small" placeholder="<?php echo esc_attr__( 'Qty.', 'siegel-umzugsliste' ); ?>">
+					<input type="text" name="<?php echo esc_attr( substr( $field_name, 0, -1 ) . '_anzahl]' ); ?>" class="qty-small" placeholder="<?php echo esc_attr__( 'Qty.', 'siegel-umzugsliste' ); ?>">
 				</div>
 				<?php
 				break;

includes/class-test-email.php

@@ -0,0 +1,306 @@
+<?php
+/**
+ * Test Email
+ *
+ * Admin tool for generating and previewing test emails with all fields populated
+ *
+ * @package Umzugsliste
+ */
+
+if ( ! defined( 'ABSPATH' ) ) {
+	exit;
+}
+
+/**
+ * Test email class
+ */
+class Umzugsliste_Test_Email {
+
+	/**
+	 * Single instance
+	 *
+	 * @var Umzugsliste_Test_Email
+	 */
+	private static $instance = null;
+
+	/**
+	 * Get instance
+	 *
+	 * @return Umzugsliste_Test_Email
+	 */
+	public static function get_instance() {
+		if ( null === self::$instance ) {
+			self::$instance = new self();
+		}
+		return self::$instance;
+	}
+
+	/**
+	 * Constructor
+	 */
+	private function __construct() {
+		add_action( 'admin_init', array( $this, 'maybe_output_preview' ) );
+	}
+
+	/**
+	 * Intercept preview request before admin page header is output
+	 */
+	public function maybe_output_preview() {
+		if ( ! isset( $_GET['page'] ) || 'umzugsliste-test-email' !== $_GET['page'] ) {
+			return;
+		}
+		if ( ! isset( $_GET['action'] ) || 'preview' !== $_GET['action'] ) {
+			return;
+		}
+		if ( ! current_user_can( 'manage_options' ) ) {
+			wp_die( 'Unauthorized' );
+		}
+
+		switch_to_locale( 'de_DE' );
+		$data = self::generate_test_data();
+		$html = Umzugsliste_Email_Generator::generate( $data );
+		restore_previous_locale();
+
+		echo $html;
+		exit;
+	}
+
+	/**
+	 * Generate comprehensive test data array with every field populated
+	 *
+	 * Must be called within de_DE locale context so __() returns German strings
+	 *
+	 * @return array Complete form submission data
+	 */
+	public static function generate_test_data() {
+		$data = array();
+
+		// Date - today
+		$data['umzug_day']   = date( 'd' );
+		$data['umzug_month'] = date( 'm' );
+		$data['umzug_year']  = date( 'Y' );
+
+		// Address fields - realistic German test values
+		$data['bName']    = 'Max Mustermann';
+		$data['eName']    = 'Erika Musterfrau';
+		$data['bStrasse'] = 'Musterstraße 42';
+		$data['eStrasse'] = 'Beispielweg 7';
+		$data['bort']     = '65197 Wiesbaden';
+		$data['eort']     = '55116 Mainz';
+		$data['bTelefon'] = '0611 123456';
+		$data['eTelefon'] = '06131 654321';
+
+		// Info array
+		$data['info'] = array(
+			'bGeschoss' => '2. OG',
+			'eGeschoss' => 'EG',
+			'bLift'     => 'ja',
+			'eLift'     => 'nein',
+			'bTelefax'  => '0611 123457',
+			'eTelefax'  => '06131 654322',
+			'bMobil'    => '0170 1234567',
+			'eMobil'    => '0171 7654321',
+			'eE-Mail'   => 'test@example.com',
+		);
+
+		// Room data - pick 2-3 items per room with fixed quantities
+		$room_picks = array(
+			'wohnzimmer'       => array( array( 0, 2 ), array( 4, 4 ), array( 8, 1 ) ),
+			'schlafzimmer'     => array( array( 2, 1 ), array( 3, 2 ), array( 5, 2 ) ),
+			'arbeitszimmer'    => array( array( 1, 1 ), array( 3, 2 ), array( 8, 1 ) ),
+			'bad'              => array( array( 0, 1 ), array( 1, 1 ) ),
+			'kueche_esszimmer' => array( array( 4, 1 ), array( 7, 4 ), array( 9, 1 ) ),
+			'kinderzimmer'     => array( array( 2, 1 ), array( 3, 1 ), array( 6, 1 ) ),
+			'keller'           => array( array( 0, 2 ), array( 4, 4 ), array( 8, 1 ) ),
+		);
+
+		$rooms = Umzugsliste_Furniture_Data::get_rooms();
+
+		foreach ( $rooms as $room_key => $room_label ) {
+			$post_array_name = ucfirst( $room_key );
+			if ( 'kueche_esszimmer' === $room_key ) {
+				$post_array_name = 'Kueche_Esszimmer';
+			}
+
+			$furniture_items = Umzugsliste_Furniture_Data::get_furniture_items( $room_key );
+			$picks           = $room_picks[ $room_key ];
+			$room_data       = array();
+
+			foreach ( $picks as $pick ) {
+				$idx      = $pick[0];
+				$quantity = $pick[1];
+
+				if ( isset( $furniture_items[ $idx ] ) ) {
+					$item = $furniture_items[ $idx ];
+					$name = $item['name'];
+
+					$room_data[ 'v' . $name ] = (string) $quantity;
+					$room_data[ 'q' . $name ] = (string) $item['cbm'];
+					$room_data[ 'm' . $name ] = ( $quantity > 2 ) ? 'ja' : 'nein';
+				}
+			}
+
+			$data[ $post_array_name ] = $room_data;
+		}
+
+		// Additional work
+		$sections        = Umzugsliste_Furniture_Data::get_additional_work();
+		$additional_work = array();
+
+		// Montage - both checkboxes checked
+		$montage_data = array();
+		foreach ( $sections['montage']['fields'] as $field ) {
+			$key                = self::get_field_key( $field );
+			$montage_data[ $key ] = 'ja';
+		}
+		$additional_work['montage'] = $montage_data;
+
+		// Schrank - mix of Abbau, Aufbau, Beides
+		$schrank_values = array( 'Abbau', 'Aufbau', 'Beides', 'Abbau', 'Aufbau', 'Beides' );
+		$schrank_data   = array();
+		$i              = 0;
+		foreach ( $sections['schrank']['fields'] as $field ) {
+			$key                = self::get_field_key( $field );
+			$schrank_data[ $key ] = $schrank_values[ $i % count( $schrank_values ) ];
+			$i++;
+		}
+		$additional_work['schrank'] = $schrank_data;
+
+		// Elektriker - all checked with varied _anzahl values
+		$elektriker_data = array();
+		$anzahl          = 1;
+		foreach ( $sections['elektriker']['fields'] as $field ) {
+			$key                             = self::get_field_key( $field );
+			$elektriker_data[ $key ]           = 'ja';
+			$elektriker_data[ $key . '_anzahl' ] = (string) $anzahl;
+			$anzahl++;
+		}
+		$additional_work['elektriker'] = $elektriker_data;
+
+		// Duebelarbeiten - all checked with varied _anzahl values
+		$duebel_data = array();
+		$anzahl      = 2;
+		foreach ( $sections['duebelarbeiten']['fields'] as $field ) {
+			$key                           = self::get_field_key( $field );
+			$duebel_data[ $key ]           = 'ja';
+			$duebel_data[ $key . '_anzahl' ] = (string) $anzahl;
+			$anzahl += 2;
+		}
+		$additional_work['duebelarbeiten'] = $duebel_data;
+
+		// Packarbeiten - all 4 checkboxes checked, text quantities filled
+		$pack_data   = array();
+		$pack_fields = $sections['packarbeiten']['fields'];
+		for ( $i = 0; $i < 4 && $i < count( $pack_fields ); $i++ ) {
+			$key               = self::get_field_key( $pack_fields[ $i ] );
+			$pack_data[ $key ] = 'ja';
+		}
+		for ( $i = 4; $i < 6 && $i < count( $pack_fields ); $i++ ) {
+			$key               = self::get_field_key( $pack_fields[ $i ] );
+			$pack_data[ $key ] = ( $i === 4 ) ? '25' : '5';
+		}
+		$additional_work['packarbeiten'] = $pack_data;
+
+		// Anfahrt - all checkboxes checked + distance text values
+		$anfahrt_data   = array();
+		$anfahrt_fields = $sections['anfahrt']['fields'];
+		foreach ( $anfahrt_fields as $i => $field ) {
+			$key = self::get_field_key( $field );
+			if ( 'checkbox' === $field['type'] ) {
+				$anfahrt_data[ $key ] = 'ja';
+			} else {
+				$anfahrt_data[ $key ] = ( $i === 6 ) ? '15' : '25';
+			}
+		}
+		$additional_work['anfahrt'] = $anfahrt_data;
+
+		$data['additional_work'] = $additional_work;
+
+		// Sonstiges
+		$data['sonstiges'] = "Bitte vorsichtig mit dem antiken Schrank im Wohnzimmer.\nDas Klavier muss besonders geschützt werden.";
+
+		return $data;
+	}
+
+	/**
+	 * Get field key matching email generator logic
+	 *
+	 * @param array $field Field definition
+	 * @return string Field key
+	 */
+	private static function get_field_key( $field ) {
+		if ( ! empty( $field['key'] ) ) {
+			return sanitize_key( $field['key'] );
+		}
+		return sanitize_title( $field['name'] );
+	}
+
+	/**
+	 * Render admin page
+	 */
+	public function render_admin_page() {
+		// Handle send test email
+		$notice = '';
+		if ( isset( $_POST['send_test_email'] ) && check_admin_referer( 'umzugsliste_send_test_email' ) ) {
+			$notice = $this->send_test_email();
+		}
+
+		$preview_url = add_query_arg(
+			array(
+				'page'   => 'umzugsliste-test-email',
+				'action' => 'preview',
+			),
+			admin_url( 'admin.php' )
+		);
+
+		?>
+		<div class="wrap">
+			<h1>Test Email</h1>
+
+			<?php if ( $notice ) : ?>
+				<?php echo $notice; ?>
+			<?php endif; ?>
+
+			<form method="post" style="margin-bottom: 20px;">
+				<?php wp_nonce_field( 'umzugsliste_send_test_email' ); ?>
+				<p>
+					<?php $to = get_option( 'umzugsliste_receiver_email', get_option( 'admin_email' ) ); ?>
+					<strong>Recipient:</strong> <?php echo esc_html( $to ); ?>
+				</p>
+				<p>
+					<?php submit_button( 'Send Test Email', 'primary', 'send_test_email', false ); ?>
+				</p>
+			</form>
+
+			<h2>Email Preview</h2>
+			<iframe
+				src="<?php echo esc_url( $preview_url ); ?>"
+				style="width: 100%; height: 800px; border: 1px solid #ccd0d4; background: #fff;"
+			></iframe>
+		</div>
+		<?php
+	}
+
+	/**
+	 * Send test email
+	 *
+	 * @return string Notice HTML
+	 */
+	private function send_test_email() {
+		switch_to_locale( 'de_DE' );
+		$data = self::generate_test_data();
+		$html = Umzugsliste_Email_Generator::generate( $data );
+		restore_previous_locale();
+
+		$to      = get_option( 'umzugsliste_receiver_email', get_option( 'admin_email' ) );
+		$subject = 'TEST - Internetanfrage - Anfrage vom ' . date( 'd.m.Y H:i' );
+		$headers = array( 'Content-Type: text/html; charset=UTF-8' );
+
+		$sent = wp_mail( $to, $subject, $html, $headers );
+
+		if ( $sent ) {
+			return '<div class="notice notice-success is-dismissible"><p>Test email sent to <strong>' . esc_html( $to ) . '</strong>.</p></div>';
+		}
+		return '<div class="notice notice-error is-dismissible"><p>Failed to send test email. Check your mail configuration.</p></div>';
+	}
+}

umzugsliste.php

@@ -3,7 +3,7 @@
  * Plugin Name: Umzugsliste
  * Description: Email-basiertes Möbelauswahlsystem für Siegel Umzüge
  * Version: 1.0.0
- * Author: Siegel Umzüge
+ * Author: Viktor Miller
  * Text Domain: siegel-umzugsliste
  * Domain Path: /languages
  */
@@ -84,6 +84,7 @@ class Umzugsliste {
 		require_once UMZUGSLISTE_PLUGIN_DIR . 'includes/class-form-renderer.php';
 		require_once UMZUGSLISTE_PLUGIN_DIR . 'includes/class-shortcode.php';
 		require_once UMZUGSLISTE_PLUGIN_DIR . 'includes/class-email-generator.php';
+		require_once UMZUGSLISTE_PLUGIN_DIR . 'includes/class-test-email.php';
 		require_once UMZUGSLISTE_PLUGIN_DIR . 'includes/class-form-handler.php';
 	}
 
@@ -152,9 +153,10 @@ class Umzugsliste {
 		$cpt = Umzugsliste_CPT::get_instance();
 		$cpt->register_post_type();
 
-		// Initialize admin menu
+		// Initialize admin menu and test email
 		if ( is_admin() ) {
 			Umzugsliste_Admin_Menu::get_instance();
+			Umzugsliste_Test_Email::get_instance();
 		}
 
 		// Initialize settings