Refactor code structure for improved readability and maintainability

config/database.php

@@ -147,6 +147,7 @@ function ensure_tables_exist(PDO $pdo): void {
             "ALTER TABLE users ADD COLUMN theme VARCHAR(20) NOT NULL DEFAULT 'dark' AFTER notification_settings",
             "ALTER TABLE users ADD COLUMN avatar_url VARCHAR(255) NULL AFTER theme",
             "ALTER TABLE users ADD COLUMN backup_codes TEXT NULL AFTER two_factor_enabled",
+            "ALTER TABLE board_card_schedules ADD UNIQUE KEY uk_sched_card (card_id)",
         ];
         foreach ($colUpgrades as $sql) {
             try {
@@ -155,6 +156,37 @@ function ensure_tables_exist(PDO $pdo): void {
                 // Stil negeren indien kolom al bestaat
             }
         }
+
+        // Zorg dat er ten minste één standaard bord met standaard lanes aanwezig is
+        try {
+            $boardCount = (int)$pdo->query("SELECT COUNT(*) FROM boards")->fetchColumn();
+            if ($boardCount === 0) {
+                $firstAdminId = (int)$pdo->query("SELECT id FROM users ORDER BY (role = 'ADMIN') DESC, id ASC LIMIT 1")->fetchColumn();
+                if ($firstAdminId > 0) {
+                    $pdo->prepare("INSERT INTO boards (title, description, created_by_id) VALUES (?, ?, ?)")
+                        ->execute(['Hoofdbord', 'Standaard team- en takenbord voor opdrachten', $firstAdminId]);
+                    $boardId = (int)$pdo->lastInsertId();
+
+                    // Maak beheerder lid van het bord
+                    $pdo->prepare("INSERT INTO board_members (board_id, user_id, role) VALUES (?, ?, 'ADMIN')")
+                        ->execute([$boardId, $firstAdminId]);
+
+                    // Maak de 4 standaard lanes aan
+                    $defaultLanes = [
+                        ['title' => 'Open', 'color' => 'slate', 'pos' => 0],
+                        ['title' => 'In uitvoering', 'color' => 'amber', 'pos' => 1],
+                        ['title' => 'Testen', 'color' => 'purple', 'pos' => 2],
+                        ['title' => 'Klaar', 'color' => 'emerald', 'pos' => 3],
+                    ];
+                    $laneStmt = $pdo->prepare("INSERT INTO board_lanes (board_id, title, color, position) VALUES (?, ?, ?, ?)");
+                    foreach ($defaultLanes as $l) {
+                        $laneStmt->execute([$boardId, $l['title'], $l['color'], $l['pos']]);
+                    }
+                }
+            }
+        } catch (Throwable $e) {
+            // Stil negeren indien tabellen nog in opbouw zijn
+        }
     } catch (Throwable $e) {
         error_log("Fout bij controleren tabellen: " . $e->getMessage());
     }