Ai aanpassingen en slepen in planner blokken

api/brainstorm.php

@@ -113,6 +113,39 @@ try {
         exit;
     }
 
+    // 3b. Kaart verplaatsen naar andere categorie/lane (Drag & Drop)
+    if ($action === 'move_card') {
+        $data = json_decode(file_get_contents('php://input'), true);
+        $cardId = (int)($data['card_id'] ?? 0);
+        $category = trim($data['category'] ?? '');
+
+        $validCategories = ['Ideeën', 'Knelpunten', 'Oplossingen', 'Quick Wins'];
+        if (!$cardId || !in_array($category, $validCategories, true)) {
+            echo json_encode(['error' => 'Ongeldige kaart of categorie']);
+            exit;
+        }
+
+        // Bepaal kleur behorend bij de nieuwe categorie
+        $colorMap = [
+            'Ideeën' => 'amber',
+            'Knelpunten' => 'rose',
+            'Oplossingen' => 'teal',
+            'Quick Wins' => 'indigo'
+        ];
+        $newColor = $colorMap[$category] ?? 'amber';
+
+        $stmt = $db->prepare("UPDATE brainstorm_cards SET category = ?, color = ? WHERE id = ?");
+        $stmt->execute([$category, $newColor, $cardId]);
+
+        echo json_encode([
+            'success' => true,
+            'card_id' => $cardId,
+            'category' => $category,
+            'color' => $newColor
+        ]);
+        exit;
+    }
+
     // 4. Omzetten naar Roadmap!
     if ($action === 'convert_to_roadmap') {
         $data = json_decode(file_get_contents('php://input'), true);