feat(03-01): add job submission form to provider dashboard

- Add job submission form section above job listings table
- Display form using Formidable shortcode with graceful fallback
- Add visual separation styling for form section (gray background, padding, border-radius)
- Wrap job listings in separate section for better organization

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

templates/provider-dashboard.php

@@ -40,6 +40,19 @@ $job_query = new WP_Query( $args );
 ?>
 
 <div class="ddhh-provider-dashboard">
+	<div class="ddhh-job-submit-section">
+		<h2>Neues Stellenangebot erstellen</h2>
+		<?php
+		$form_id = DDHH_JM_Formidable::get_job_submission_form_id();
+		if ( $form_id ) {
+			echo do_shortcode( "[formidable id={$form_id}]" );
+		} else {
+			echo '<p>Formular konnte nicht geladen werden.</p>';
+		}
+		?>
+	</div>
+
+	<div class="ddhh-job-listings-section">
 		<h2>Meine Stellenangebote</h2>
 
 	<?php if ( $job_query->have_posts() ) : ?>
@@ -102,6 +115,7 @@ $job_query = new WP_Query( $args );
 	<?php endif; ?>
 
 	<?php wp_reset_postdata(); ?>
+	</div>
 </div>
 
 <style>
@@ -111,6 +125,24 @@ $job_query = new WP_Query( $args );
 	padding: 0 1rem;
 }
 
+.ddhh-job-submit-section {
+	margin-bottom: 3rem;
+	padding: 2rem;
+	background: #f5f5f5;
+	border-radius: 8px;
+}
+
+.ddhh-job-submit-section h2 {
+	margin-top: 0;
+	margin-bottom: 1.5rem;
+	font-size: 1.5rem;
+	color: #333;
+}
+
+.ddhh-job-listings-section {
+	margin-top: 3rem;
+}
+
 .ddhh-provider-dashboard h2 {
 	margin-bottom: 1.5rem;
 	font-size: 2rem;