diff --git a/WorkflowEngine.php b/WorkflowEngine.php
index f4071b8..98ed786 100644
--- a/WorkflowEngine.php
+++ b/WorkflowEngine.php
@@ -1,4 +1,5 @@
 <?php
+// Cache-buster: 1720638682
 require_once __DIR__ . '/db/config.php';
 
 class WorkflowEngine {
@@ -27,7 +28,7 @@ class WorkflowEngine {
         
         $instances = [];
         foreach ($instances_data as $instance) {
-            $instances[$instance['personId']][$instance['processDefinitionId']] = $instance;
+            $instances[$instance['person_id']][$instance['process_definition_id']] = $instance;
         }
 
         return [
@@ -38,33 +39,45 @@ class WorkflowEngine {
     }
 
     public function startProcess(string $processCode, int $personId, int $userId): ?int {
-        error_log("startProcess: processCode=$processCode, personId=$personId, userId=$userId");
         $this->pdo->beginTransaction();
         try {
             // 1. Find active process definition by code.
             $stmt_def = $this->pdo->prepare("SELECT * FROM process_definitions WHERE code = ? AND active = 1");
             $stmt_def->execute([$processCode]);
             $definition = $stmt_def->fetch(PDO::FETCH_ASSOC);
-            error_log("startProcess: definition=" . print_r($definition, true));
 
             if (!$definition) {
-                throw new Exception("Active process definition with code '$processCode' not found.");
-            }
+                // If no process definition is found, check if there is a definition for a checklist
+                $stmt_def = $this->pdo->prepare("SELECT * FROM process_definitions WHERE id = ?");
+                $stmt_def->execute([$processCode]);
+                $definition = $stmt_def->fetch(PDO::FETCH_ASSOC);
 
-            $definition_json = json_decode($definition['definition_json'], true);
-            if (!$definition_json || !isset($definition_json['start_node_id'])) {
-                throw new Exception("Process definition is missing start_node_id.");
+                if (!$definition) {
+                    throw new Exception("Process definition with code or id '$processCode' not found.");
+                }
+
+                $definition_json = !empty($definition['definition_json']) ? json_decode($definition['definition_json'], true) : [];
+                if (empty($definition_json) || $definition_json['type'] !== 'checklist') {
+                    throw new Exception("Process definition with code '$processCode' not found or not a checklist.");
+                }
+
+                // For checklists, there's no start_node_id, so we can proceed with instance creation
+                $startNodeId = null;
+
+            } else {
+                $definition_json = !empty($definition['definition_json']) ? json_decode($definition['definition_json'], true) : [];
+                if (empty($definition_json) || !isset($definition_json['start_node_id'])) {
+                    throw new Exception("Process definition is missing start_node_id.");
+                }
+                $startNodeId = $definition_json['start_node_id'];
             }
-            $startNodeId = $definition_json['start_node_id'];
 
             // 2. Create a new process instance.
             $stmt_insert = $this->pdo->prepare(
-                "INSERT INTO process_instances (personId, processDefinitionId, current_node_id, current_status, lastActivityAt) VALUES (?, ?, ?, 'in_progress', NOW())"
+                "INSERT INTO process_instances (person_id, process_definition_id, current_node_id, current_status, lastActivityAt) VALUES (?, ?, ?, 'in_progress', NOW())"
             );
             $stmt_insert->execute([$personId, $definition['id'], $startNodeId]);
-            error_log("startProcess: affected rows=" . $stmt_insert->rowCount());
             $instanceId = $this->pdo->lastInsertId();
-            error_log("startProcess: instanceId=$instanceId");
 
             // 3. Create a system event for process start.
             $this->addEvent($instanceId, 'system', 'Process started.', $startNodeId, [], $userId);
@@ -88,9 +101,9 @@ class WorkflowEngine {
         }
 
         $stmt_def = $this->pdo->prepare("SELECT definition_json FROM process_definitions WHERE id = ?");
-        $stmt_def->execute([$instance['processDefinitionId']]);
+        $stmt_def->execute([$instance['process_definition_id']]);
         $definition_json = $stmt_def->fetchColumn();
-        $definition = json_decode($definition_json, true);
+        $definition = !empty($definition_json) ? json_decode($definition_json, true) : [];
 
         $currentNodeId = $instance['current_node_id'];
         $nodeInfo = $definition['nodes'][$currentNodeId] ?? null;
@@ -157,22 +170,45 @@ class WorkflowEngine {
         }
     }
 
+    public function addNote(int $instanceId, string $message, int $userId): bool {
+        $state = $this->getProcessState($instanceId);
+        if (!$state) {
+            // Even if the instance isn't found, we shouldn't crash. Log and return false.
+            error_log("addNote failed: Process instance $instanceId not found.");
+            return false;
+        }
+        $currentNodeId = $state['instance']['current_node_id'];
+        $payload = ['message' => $message];
+        $this->addEvent($instanceId, 'note', $message, $currentNodeId, $payload, $userId);
+        return true;
+    }
+
     private function addEvent(int $instanceId, string $eventType, string $message, ?string $nodeId, array $payload, int $userId): void {
         $stmt = $this->pdo->prepare(
-            "INSERT INTO process_events (processInstanceId, eventType, message, node_id, payload_json, createdById) VALUES (?, ?, ?, ?, ?, ?)"
+            "INSERT INTO process_events (processInstanceId, event_type, message, node_id, payload_json, createdBy, createdAt) VALUES (?, ?, ?, ?, ?, ?, NOW())"
         );
         $stmt->execute([$instanceId, $eventType, $message, $nodeId, json_encode($payload), $userId]);
     }
 
     public function getOrCreateInstanceByDefId(int $personId, int $processDefinitionId, int $userId): ?array {
-        $stmt = $this->pdo->prepare("SELECT * FROM process_instances WHERE personId = ? AND processDefinitionId = ?");
+        $stmt = $this->pdo->prepare("SELECT * FROM process_instances WHERE `person_id` = ? AND `process_definition_id` = ?");
         $stmt->execute([$personId, $processDefinitionId]);
         $instance = $stmt->fetch(PDO::FETCH_ASSOC);
 
         if (!$instance) {
-            $stmt_def = $this->pdo->prepare("SELECT code FROM process_definitions WHERE id = ?");
+            // For checklists, the process code is the process definition ID
+            $stmt_def = $this->pdo->prepare("SELECT definition_json FROM process_definitions WHERE id = ?");
             $stmt_def->execute([$processDefinitionId]);
-            $processCode = $stmt_def->fetchColumn();
+            $definition_json = $stmt_def->fetchColumn();
+            $definition = !empty($definition_json) ? json_decode($definition_json, true) : [];
+
+            if ($definition && isset($definition['type']) && $definition['type'] === 'checklist') {
+                $processCode = (string) $processDefinitionId;
+            } else {
+                $stmt_def = $this->pdo->prepare("SELECT code FROM process_definitions WHERE id = ?");
+                $stmt_def->execute([$processDefinitionId]);
+                $processCode = $stmt_def->fetchColumn();
+            }
 
             if($processCode) {
                 $instanceId = $this->startProcess($processCode, $personId, $userId);
@@ -187,7 +223,7 @@ class WorkflowEngine {
     }
 
     public function getEvents(int $instanceId): array {
-        $stmt_events = $this->pdo->prepare("SELECT pe.*, p.email as user_email, p.firstName, p.lastName FROM process_events pe JOIN people p ON pe.createdById = p.id WHERE pe.processInstanceId = ? ORDER BY pe.createdAt DESC");
+        $stmt_events = $this->pdo->prepare("SELECT pe.*, p.email as user_email, p.firstName, p.lastName FROM process_events pe JOIN people p ON pe.createdBy = p.id WHERE pe.processInstanceId = ? ORDER BY pe.createdAt DESC");
         $stmt_events->execute([$instanceId]);
         return $stmt_events->fetchAll(PDO::FETCH_ASSOC);
     }
@@ -212,4 +248,17 @@ class WorkflowEngine {
 
         return $transitions;
     }
-}
+
+    public function getProcessDefinitionNodes(int $processDefinitionId): array {
+        $stmt = $this->pdo->prepare("SELECT definition_json FROM process_definitions WHERE id = ?");
+        $stmt->execute([$processDefinitionId]);
+        $json = $stmt->fetchColumn();
+
+        if (!$json) {
+            return [];
+        }
+
+        $definition = !empty($json) ? json_decode($json, true) : [];
+        return $definition['nodes'] ?? [];
+    }
+}
\ No newline at end of file
diff --git a/_apply_transition.php b/_apply_transition.php
index 34621ca..fced8b8 100644
--- a/_apply_transition.php
+++ b/_apply_transition.php
@@ -1,43 +1,67 @@
 <?php
 session_start();
+header('Content-Type: application/json');
+
+$response = ['success' => false, 'message' => 'Wystąpił nieoczekiwany błąd.'];
 
 if ($_SERVER['REQUEST_METHOD'] !== 'POST') {
-    header('Location: process_dashboard.php');
+    http_response_code(405);
+    $response['message'] = 'Invalid request method.';
+    echo json_encode($response);
     exit;
 }
 
 require_once 'WorkflowEngine.php';
 
 if (!isset($_POST['instanceId']) || !isset($_POST['transitionId'])) {
-    $_SESSION['flash_message'] = ['type' => 'danger', 'message' => 'Błąd: Brak wymaganych parametrów.'];
-    header('Location: process_dashboard.php');
+    http_response_code(400);
+    $response['message'] = 'Błąd: Brak wymaganych parametrów.';
+    echo json_encode($response);
     exit;
 }
 
 $instanceId = (int)$_POST['instanceId'];
 $transitionId = $_POST['transitionId'];
 $userId = $_SESSION['user_id'] ?? null;
-$payload = $_POST['payload'] ?? null;
+$payload = $_POST['payload'] ?? [];
 
 if (!$userId) {
-    $_SESSION['flash_message'] = ['type' => 'danger', 'message' => 'Błąd: Sesja wygasła.'];
-    header('Location: login.php');
+    http_response_code(401);
+    $response['message'] = 'Błąd: Sesja wygasła.';
+    echo json_encode($response);
     exit;
 }
 
 try {
     $engine = new WorkflowEngine();
-    $success = $engine->applyTransition($instanceId, $transitionId, $payload, $userId);
+    $success = false;
+
+    if ($transitionId === 'note') {
+        // Special case: Just add a note, don't change state.
+        $message = $payload['message'] ?? '';
+        if (!empty($message)) {
+            $success = $engine->addNote($instanceId, $message, $userId);
+            if ($success) {
+                $response['message'] = 'Notatka została dodana.';
+            }
+        }
+    } else {
+        // Standard transition logic
+        $success = $engine->applyTransition($instanceId, $transitionId, $payload, $userId);
+        if ($success) {
+            $response['message'] = 'Akcja została wykonana pomyślnie.';
+        }
+    }
 
     if ($success) {
-        $_SESSION['flash_message'] = ['type' => 'success', 'message' => 'Akcja została wykonana pomyślnie.'];
-    } else {
-        $_SESSION['flash_message'] = ['type' => 'danger', 'message' => 'Błąd: Nie udało się wykonać akcji.'];
+        $response['success'] = true;
     }
+
 } catch (Exception $e) {
     error_log("Error applying transition: " . $e->getMessage());
-    $_SESSION['flash_message'] = ['type' => 'danger', 'message' => 'Wystąpił krytyczny błąd: ' . $e->getMessage()];
+    http_response_code(500);
+    $response['message'] = 'Wystąpił krytyczny błąd: ' . $e->getMessage();
 }
 
-header('Location: process_dashboard.php');
+echo json_encode($response);
 exit;
\ No newline at end of file
diff --git a/_get_instance_details.php b/_get_instance_details.php
index b19d060..514a6e8 100644
--- a/_get_instance_details.php
+++ b/_get_instance_details.php
@@ -1,17 +1,15 @@
 <?php
-
 require_once 'WorkflowEngine.php';
 session_start();
 
+// Security check
 if (!isset($_SESSION['user_id'])) {
     http_response_code(401);
     die('Brak autoryzacji');
 }
 
 $personId = $_GET['personId'] ?? null;
-$processDefinitionId = $_GET['processId'] ?? null; // Pulpit wysyła processId, który jest ID definicji
-
-
+$processDefinitionId = $_GET['processId'] ?? null;
 
 if (!$personId || !$processDefinitionId) {
     http_response_code(400);
@@ -20,73 +18,158 @@ if (!$personId || !$processDefinitionId) {
 
 $userId = $_SESSION['user_id'];
 $engine = new WorkflowEngine();
+$pdo = db();
 
-// 1. Pobierz lub utwórz instancję
+// 1. Get or create instance
 $instance = $engine->getOrCreateInstanceByDefId($personId, $processDefinitionId, $userId);
-
 if (!$instance) {
     http_response_code(500);
-    die("Nie można pobrać lub utworzyć instancji procesu. personId: $personId, processDefinitionId: $processDefinitionId, userId: $userId");
+    die("Nie można pobrać lub utworzyć instancji procesu.");
 }
 $instanceId = $instance['id'];
 
-// 2. Pobierz powiązane dane przez silnik
-$events = $engine->getEvents($instanceId);
-$availableTransitions = $engine->getAvailableTransitions($instanceId);
-
-// 3. Pobierz nazwy do wyświetlenia
-$pdo = db();
+// 2. Fetch all related data
 $stmt_person = $pdo->prepare("SELECT firstName, lastName FROM people WHERE id = ?");
 $stmt_person->execute([$personId]);
 $person = $stmt_person->fetch();
 
-$stmt_process = $pdo->prepare("SELECT name FROM process_definitions WHERE id = ?");
+$stmt_process = $pdo->prepare("SELECT * FROM process_definitions WHERE id = ?");
 $stmt_process->execute([$processDefinitionId]);
 $process = $stmt_process->fetch();
+$definition = $process && $process['definition_json'] ? json_decode($process['definition_json'], true) : null;
+$isChecklist = ($definition && isset($definition['type']) && $definition['type'] === 'checklist');
+
+$events = $engine->getEvents($instanceId);
+
 ?>
 
-<h4><?= htmlspecialchars($person['firstName'] . ' ' . $person['lastName']) ?> - <?= htmlspecialchars($process['name']) ?></h4>
-<p>Status: <span class="badge bg-secondary"><?= htmlspecialchars($instance['current_status']) ?></span></p>
-<hr>
+<!-- Title for the modal, to be grabbed by JS -->
+<div id="instance-modal-title" class="d-none">
+    <?= htmlspecialchars($person['firstName'] . ' ' . $person['lastName']) ?> - <?= htmlspecialchars($process['name']) ?>
+</div>
 
-<h5>Wykonaj akcję</h5>
-<form action="_apply_transition.php" method="post">
-    <input type="hidden" name="instanceId" value="<?= $instanceId ?>">
-    <div class="mb-3">
-        <label for="transitionSelect" class="form-label">Akcja</label>
-        <select name="transitionId" id="transitionSelect" class="form-select" required>
-            <option value="" disabled selected>-- Wybierz akcję --</option>
-            <?php foreach ($availableTransitions as $transition): ?>
-                <option value="<?= $transition['id'] ?>"><?= htmlspecialchars($transition['name']) ?></option>
-            <?php endforeach; ?>
-             <option value="note">Dodaj notatkę</option> <!-- Specjalny przypadek -->
-        </select>
-    </div>
-    <div class="mb-3">
-        <label for="payloadMessage" class="form-label">Notatka / Wiadomość (opcjonalnie)</label>
-        <textarea name="payload[message]" id="payloadMessage" class="form-control" rows="3"></textarea>
-    </div>
-    <button type="submit" class="btn btn-primary">Zatwierdź</button>
-</form>
-
-<hr>
-
-<h5>Historia</h5>
-<?php if (empty($events)): ?>
-    <p>Brak zdarzeń.</p>
-<?php else: ?>
-    <ul class="list-group">
-        <?php foreach ($events as $event): ?>
-        <li class="list-group-item">
-            <strong><?= htmlspecialchars(ucfirst(str_replace('_', ' ', $event['event_type']))) ?></strong>
-            <?php if (!empty($event['message'])):
-                $payload = json_decode($event['payload_json'], true);
-                $message = $payload['message'] ?? $event['message'];
+<?php if ($isChecklist): ?>
+    <?php
+    $tasks = $definition['tasks'] ?? [];
+    $instanceData = $instance && $instance['data_json'] ? json_decode($instance['data_json'], true) : [];
+    ?>
+    <div class="checklist-modal-container">
+        <h5>Zadania do wykonania</h5>
+        <div class="checklist-container">
+            <?php foreach ($tasks as $task):
+                $isChecked = !empty($instanceData[$task['code']]);
             ?>
-                <p class="mb-1"><?= htmlspecialchars($message) ?></p>
-            <?php endif; ?>
-            <small class="text-muted">Przez <?= htmlspecialchars($event['firstName'] . ' ' . $event['lastName']) ?> dnia <?= date('d.m.Y, H:i', strtotime($event['createdAt'])) ?></small>
-        </li>
-        <?php endforeach; ?>
-    </ul>
-<?php endif; ?>
\ No newline at end of file
+                <div class="form-check">
+                    <input class="form-check-input task-checkbox-modal" type="checkbox" value=""
+                        data-task-code="<?= $task['code'] ?>" <?= $isChecked ? 'checked' : '' ?>>
+                    <label class="form-check-label" title="<?= htmlspecialchars($task['name']) ?>">
+                        <?= htmlspecialchars($task['name']) ?>
+                    </label>
+                </div>
+            <?php endforeach; ?>
+        </div>
+    </div>
+
+<?php else: ?>
+    <?php
+    $currentNodeId = $instance['current_node_id'];
+    $all_nodes = $engine->getProcessDefinitionNodes($processDefinitionId);
+    $availableTransitions = $engine->getAvailableTransitions($instanceId);
+
+    $available_target_node_ids = array_map(function($t) { return $t['to']; }, $availableTransitions);
+    $available_transitions_map = [];
+    foreach ($availableTransitions as $t) {
+        $available_transitions_map[$t['to']] = $t;
+    }
+
+    $visited_nodes = [];
+    foreach ($events as $event) {
+        if ($event['node_id']) {
+            $visited_nodes[$event['node_id']] = true;
+        }
+    }
+    ?>
+    <div class="process-steps-container">
+        <h5>Kroki procesu</h5>
+        <ul class="list-group">
+            <?php foreach ($all_nodes as $nodeId => $node): ?>
+                <?php
+                $is_current = ($currentNodeId === $nodeId);
+                $is_completed = isset($visited_nodes[$nodeId]) && !$is_current;
+                $is_available = in_array($nodeId, $available_target_node_ids);
+
+                $status_icon = '';
+                $li_class = '';
+                $button = '';
+
+                if ($is_current) {
+                    $li_class = 'list-group-item-primary';
+                    $status_icon = '<i class="bi bi-arrow-right-circle-fill text-primary me-2"></i>';
+                } elseif ($is_completed) {
+                    $li_class = 'list-group-item-success';
+                    $status_icon = '<i class="bi bi-check-circle-fill text-success me-2"></i>';
+                } else {
+                    $li_class = 'text-muted';
+                    $status_icon = '<i class="bi bi-lock-fill me-2"></i>';
+                }
+
+                if ($is_available) {
+                    $transition = $available_transitions_map[$nodeId];
+                    $button = <<<HTML
+                        <button class="btn btn-sm btn-primary apply-transition-btn"
+                                data-instance-id="{$instanceId}"
+                                data-transition-id="{$transition['id']}">
+                            {$transition['name']}
+                        </button>
+HTML;
+                }
+                ?>
+                <li class="list-group-item d-flex justify-content-between align-items-center <?= $li_class ?>">
+                    <div>
+                        <?= $status_icon ?>
+                        <strong><?= htmlspecialchars($node['name']) ?></strong>
+                    </div>
+                    <?= $button ?>
+                </li>
+            <?php endforeach; ?>
+        </ul>
+    </div>
+<?php endif; ?>
+
+<hr>
+
+<div class="add-note-container">
+    <h5>Dodaj notatkę</h5>
+    <div class="mb-3">
+        <textarea id="noteMessage" class="form-control" rows="2" placeholder="Wpisz treść notatki..."></textarea>
+    </div>
+    <button id="addNoteBtn" class="btn btn-secondary" data-instance-id="<?= $instanceId ?>">Dodaj notatkę</button>
+</div>
+
+<hr>
+
+<div class="history-container">
+    <h5>Historia</h5>
+    <?php if (empty($events)): ?>
+        <p>Brak zdarzeń.</p>
+    <?php else: ?>
+        <ul class="list-group">
+            <?php foreach ($events as $event): ?>
+            <li class="list-group-item">
+                <strong><?= htmlspecialchars(ucfirst(str_replace('_', ' ', $event['event_type']))) ?></strong>
+                <?php
+                if (!empty($event['message'])) {
+                    $payload = json_decode($event['payload_json'], true);
+                    $message = $payload['message'] ?? $event['message'];
+                    echo '<p class="mb-1 text-muted fst-italic">' . htmlspecialchars($message) . '</p>';
+                }
+                ?>
+                <small class="text-muted">Przez <?= htmlspecialchars($event['firstName'] . ' ' . $event['lastName']) ?> dnia <?= date('d.m.Y, H:i', strtotime($event['created_at'])) ?></small>
+            </li>
+            <?php endforeach; ?>
+        </ul>
+    <?php endif; ?>
+</div>
+
+
+
diff --git a/_get_process_bulk_details.php b/_get_process_bulk_details.php
new file mode 100644
index 0000000..05ed8e5
--- /dev/null
+++ b/_get_process_bulk_details.php
@@ -0,0 +1,96 @@
+<?php
+require_once 'db/config.php';
+
+header('Content-Type: application/json');
+
+if (!isset($_GET['process_id'])) {
+    http_response_code(400);
+    echo json_encode(['error' => 'Process ID is required.']);
+    exit;
+}
+
+$process_id = $_GET['process_id'];
+
+try {
+    $pdo = db();
+
+    // 1. Get process definition details
+    $stmt_def = $pdo->prepare("SELECT * FROM process_definitions WHERE id = ?");
+    $stmt_def->execute([$process_id]);
+    $process_definition = $stmt_def->fetch(PDO::FETCH_ASSOC);
+
+    if (!$process_definition) {
+        http_response_code(404);
+        echo json_encode(['error' => 'Process definition not found.']);
+        exit;
+    }
+
+    if (!empty($process_definition['definition_json'])) {
+        $process_definition['definition_json'] = json_decode($process_definition['definition_json'], true);
+        if (json_last_error() !== JSON_ERROR_NONE) {
+            throw new Exception("Failed to decode process definition JSON. Error: " . json_last_error_msg());
+        }
+    } else {
+        $process_definition['definition_json'] = [];
+    }
+
+    // 2. Get all instances for this process
+    $stmt_instances = $pdo->prepare("SELECT * FROM process_instances WHERE processDefinitionId = ?");
+    $stmt_instances->execute([$process_id]);
+    $instances = $stmt_instances->fetchAll(PDO::FETCH_ASSOC);
+
+    $instance_ids = array_map(function($i) { return $i['id']; }, $instances);
+
+    // 3. Get all events for these instances
+    $events = [];
+    if (!empty($instance_ids)) {
+        $placeholders = implode(',', array_fill(0, count($instance_ids), '?'));
+        $stmt_events = $pdo->prepare("SELECT * FROM process_events WHERE processInstanceId IN ($placeholders) ORDER BY createdAt, id");
+        $stmt_events->execute($instance_ids);
+        $all_events = $stmt_events->fetchAll(PDO::FETCH_ASSOC);
+        // Group events by instance_id
+        foreach ($all_events as $event) {
+            $events[$event['processInstanceId']][] = $event;
+        }
+    }
+
+    // 4. Get People details
+    $people_ids = array_unique(array_column($instances, 'personId'));
+    $people = [];
+    if (!empty($people_ids)) {
+        $valid_people_ids = array_filter($people_ids, 'is_numeric');
+
+        if (!empty($valid_people_ids)) {
+            $placeholders = implode(',', array_fill(0, count($valid_people_ids), '?'));
+            $stmt_people = $pdo->prepare("SELECT id, firstName, lastName FROM people WHERE id IN ($placeholders)");
+            $stmt_people->execute(array_values($valid_people_ids));
+            $people_results = $stmt_people->fetchAll(PDO::FETCH_ASSOC);
+            foreach ($people_results as $person) {
+                $people[$person['id']] = $person;
+                $people[$person['id']]['name'] = trim($person['firstName'] . ' ' . $person['lastName']);
+            }
+        }
+    }
+
+    // Assemble the response
+    // Ensure steps are available, even if the JSON is empty or malformed.
+    $steps = !empty($process_definition['definition_json']['steps']) ? $process_definition['definition_json']['steps'] : [];
+    
+    $response = [
+        'process' => $process_definition,
+        'steps' => $steps,
+        'instances' => $instances,
+        'events' => $events,
+        'people' => $people
+    ];
+
+    echo json_encode($response);
+
+} catch (PDOException $e) {
+    http_response_code(500);
+    echo json_encode(['error' => 'A database error occurred.', 'details' => $e->getMessage()]);
+} catch (Exception $e) {
+    http_response_code(500);
+    echo json_encode(['error' => 'A general error occurred.', 'details' => $e->getMessage()]);
+}
+?>
\ No newline at end of file
diff --git a/_init_single_instance.php b/_init_single_instance.php
new file mode 100644
index 0000000..5e612c2
--- /dev/null
+++ b/_init_single_instance.php
@@ -0,0 +1,31 @@
+<?php
+session_start();
+require_once 'WorkflowEngine.php';
+
+if (!isset($_SESSION['user_id'])) {
+    $_SESSION['error_message'] = "Authentication required.";
+    header('Location: login.php');
+    exit();
+}
+$userId = $_SESSION['user_id']; 
+
+$personId = $_GET['personId'] ?? null;
+$processDefinitionId = $_GET['processId'] ?? null;
+
+if (!$personId || !$processDefinitionId) {
+    $_SESSION['error_message'] = "Missing parameters for process initialization.";
+    header('Location: index.php');
+    exit();
+}
+
+$engine = new WorkflowEngine();
+$instance = $engine->getOrCreateInstanceByDefId($personId, $processDefinitionId, $userId);
+
+if ($instance) {
+    $_SESSION['success_message'] = "Process initialized successfully.";
+} else {
+    $_SESSION['error_message'] = "Failed to initialize process.";
+}
+
+header('Location: index.php');
+exit();
diff --git a/_update_training_checklist_status.php b/_update_training_checklist_status.php
new file mode 100644
index 0000000..e8c6852
--- /dev/null
+++ b/_update_training_checklist_status.php
@@ -0,0 +1,81 @@
+<?php
+require_once 'db/config.php';
+session_start();
+
+if (!isset($_SESSION['user_id'])) {
+    http_response_code(401);
+    echo json_encode(['success' => false, 'error' => 'Unauthorized']);
+    exit;
+}
+
+if ($_SERVER['REQUEST_METHOD'] !== 'POST') {
+    http_response_code(405);
+    echo json_encode(['error' => 'Method Not Allowed']);
+    exit;
+}
+
+$inputJSON = file_get_contents('php://input');
+$input = json_decode($inputJSON, true);
+
+if (json_last_error() !== JSON_ERROR_NONE) {
+    http_response_code(400);
+    echo json_encode(['error' => 'Invalid JSON']);
+    exit;
+}
+
+$instanceId = $input['instance_id'] ?? null;
+$taskCode = $input['task_code'] ?? null;
+$isChecked = $input['is_checked'] ?? null;
+
+if (!$instanceId || !$taskCode || $isChecked === null) {
+    http_response_code(400);
+    echo json_encode(['error' => 'Missing required parameters: instance_id, task_code, is_checked']);
+    exit;
+}
+
+try {
+    $pdo = db();
+
+    // Get current data_json
+    $stmt = $pdo->prepare("SELECT data_json FROM process_instances WHERE id = ?");
+    $stmt->execute([$instanceId]);
+    $currentDataJson = $stmt->fetchColumn();
+
+    $data = $currentDataJson ? json_decode($currentDataJson, true) : [];
+
+    // Update the specific task status
+    $data[$taskCode] = (bool)$isChecked;
+    $newDataJson = json_encode($data);
+
+    // Save new data_json and update timestamp
+    $stmt = $pdo->prepare("UPDATE process_instances SET data_json = ?, lastActivityAt = CURRENT_TIMESTAMP WHERE id = ?");
+    $success = $stmt->execute([$newDataJson, $instanceId]);
+
+    if ($success) {
+        // Calculate progress
+        $stmt = $pdo->prepare("SELECT pd.definition_json FROM process_definitions pd JOIN process_instances pi ON pd.id = pi.process_definition_id WHERE pi.id = ?");
+        $stmt->execute([$instanceId]);
+        $definitionJson = $stmt->fetchColumn();
+        $definition = json_decode($definitionJson, true);
+        $totalTasks = count($definition['tasks'] ?? []);
+        $completedTasks = count(array_filter($data));
+
+        echo json_encode([
+            'success' => true, 
+            'message' => 'Status updated successfully.',
+            'progress' => [
+                'completed' => $completedTasks,
+                'total' => $totalTasks
+            ],
+            'lastActivityAt' => date('d/m/y')
+        ]);
+    } else {
+        http_response_code(500);
+        echo json_encode(['error' => 'Failed to update status.']);
+    }
+
+} catch (PDOException $e) {
+    http_response_code(500);
+    echo json_encode(['error' => 'Database error: ' . $e->getMessage()]);
+}
+?>
\ No newline at end of file
diff --git a/assets/js/main.js b/assets/js/main.js
index 3a2a7cf..9011386 100644
--- a/assets/js/main.js
+++ b/assets/js/main.js
@@ -10,3 +10,151 @@ document.addEventListener('DOMContentLoaded', function () {
         });
     }
 });
+
+$(document).ready(function() {
+    // Handler for showing the edit person modal
+    $('#editPersonModal').on('show.bs.modal', function (event) {
+        var button = $(event.relatedTarget); // Button that triggered the modal
+        var personId = button.data('person-id'); // Extract info from data-* attributes
+        var modal = $(this);
+
+        // Clear previous data
+        modal.find('form').trigger('reset');
+        modal.find('#editPersonId').val('');
+        modal.find('#editRoles').empty();
+        // Clear file paths
+        modal.find('#editCompanyLogoPath, #editPersonPhotoPath, #editGainsSheetPath, #editTopWantedPath, #editTopOwnedPath').text('');
+
+        if (personId) {
+            // AJAX request to get person details
+            $.ajax({
+                url: '_get_person_details.php',
+                type: 'GET',
+                data: { id: personId },
+                dataType: 'json',
+                success: function(response) {
+                    if (response.error) {
+                        alert('Error fetching person details: ' + response.error);
+                        return;
+                    }
+
+                    var person = response.person;
+                    var all_functions = response.all_functions;
+                    var person_functions = response.person_functions;
+
+                    if (!person) {
+                         alert('Could not find person data.');
+                         return;
+                    }
+
+                    // Populate the form fields
+                    modal.find('#editPersonId').val(person.id);
+                    modal.find('#editFirstName').val(person.firstName);
+                    modal.find('#editLastName').val(person.lastName);
+                    modal.find('#editPhone').val(person.phone);
+                    modal.find('#editEmail').val(person.email);
+                    modal.find('#editRole').val(person.role);
+                    modal.find('#editBniGroup').val(person.bni_group_id);
+                    modal.find('#editCompanyName').val(person.companyName);
+                    modal.find('#editNip').val(person.nip);
+                    modal.find('#editIndustry').val(person.industry);
+                    modal.find('#editCompanySize').val(person.company_size_revenue);
+                    modal.find('#editBusinessDescription').val(person.business_description);
+                    
+                    // Populate file paths
+                    if (person.company_logo_path) {
+                        modal.find('#editCompanyLogoPath').text('Current file: ' + person.company_logo_path.split('/').pop());
+                    }
+                    if (person.person_photo_path) {
+                        modal.find('#editPersonPhotoPath').text('Current file: ' + person.person_photo_path.split('/').pop());
+                    }
+                    if (person.gains_sheet_path) {
+                        modal.find('#editGainsSheetPath').text('Current file: ' + person.gains_sheet_path.split('/').pop());
+                    }
+                    if (person.top_wanted_contacts_path) {
+                        modal.find('#editTopWantedPath').text('Current file: ' + person.top_wanted_contacts_path.split('/').pop());
+                    }
+                    if (person.top_owned_contacts_path) {
+                        modal.find('#editTopOwnedPath').text('Current file: ' + person.top_owned_contacts_path.split('/').pop());
+                    }
+
+                    // Populate functions/roles dropdown and select assigned ones
+                    var rolesSelect = modal.find('#editRoles');
+                    rolesSelect.empty(); // Clear existing options
+
+                    if (all_functions && all_functions.length > 0) {
+                        const groupedFunctions = all_functions.reduce((acc, func) => {
+                            const groupName = func.group_name || 'General';
+                            if (!acc[groupName]) {
+                                acc[groupName] = [];
+                            }
+                            acc[groupName].push(func);
+                            return acc;
+                        }, {});
+
+                        for (const groupName in groupedFunctions) {
+                            const optgroup = $('<optgroup>').attr('label', groupName);
+                            groupedFunctions[groupName].forEach(function(func) {
+                                var option = $('<option></option>').val(func.id).text(func.name);
+                                if (person_functions && person_functions.includes(String(func.id))) {
+                                    option.prop('selected', true);
+                                }
+                                optgroup.append(option);
+                            });
+                            rolesSelect.append(optgroup);
+                        }
+                    }
+
+                    // Trigger change to show/hide conditional fields
+                    modal.find('#editRole').trigger('change');
+                    
+                    // Also set up the delete button
+                    $('#deleteUserBtn').data('person-id', person.id);
+                    $('#personNameToDelete').text(person.firstName + ' ' + person.lastName);
+
+                },
+                error: function(xhr, status, error) {
+                    alert('An error occurred while fetching person data. Please try again.');
+                    console.error("AJAX Error:", status, error);
+                }
+            });
+        }
+    });
+    
+    // Show/hide group selection based on role for both Edit and Create modals
+    $(document).on('change', '#editRole, #createRole', function() {
+        const role = $(this).val();
+        const isMember = role === 'member';
+        
+        // Find the correct context (modal) for the elements
+        const modal = $(this).closest('.modal-content');
+        
+        modal.find('.member-only-fields').toggle(isMember);
+        modal.find('#edit-group-selection-div, #create-group-selection-div').toggle(isMember);
+    });
+
+    // Handle Delete Person confirmation
+    $('#confirmDeleteBtn').on('click', function() {
+        var personId = $('#deleteUserBtn').data('person-id');
+        if (personId) {
+             // Use a form submission to perform the delete
+            var form = $('<form></form>');
+            form.attr("method", "post");
+            form.attr("action", "_delete_person.php");
+
+            var field = $('<input></input>');
+            field.attr("type", "hidden");
+            field.attr("name", "id");
+            field.attr("value", personId);
+            form.append(field);
+
+            $(document.body).append(form);
+            form.submit();
+        }
+    });
+
+    // Set initial state for create form
+    $('#createPersonModal').on('show.bs.modal', function () {
+        $('#createRole').trigger('change');
+    });
+});
\ No newline at end of file
diff --git a/cookie.txt b/cookie.txt
index 82d4cef..23d0714 100644
--- a/cookie.txt
+++ b/cookie.txt
@@ -2,4 +2,4 @@
 # https://curl.se/docs/http-cookies.html
 # This file was generated by libcurl! Edit at your own risk.
 
-localhost	FALSE	/	FALSE	0	PHPSESSID	u19ekrhqoemk4c5avca3umanfb
+127.0.0.1	FALSE	/	FALSE	0	PHPSESSID	abf9a8g0sidv8idojcrr65jetp
diff --git a/db_setup.php b/db_setup.php
index ced3af6..2a4fe95 100644
--- a/db_setup.php
+++ b/db_setup.php
@@ -67,17 +67,17 @@ try {
     // 3. Process Instances table (updated FK)
     $pdo->exec("CREATE TABLE IF NOT EXISTS `process_instances` (
         `id` INT(11) UNSIGNED AUTO_INCREMENT PRIMARY KEY,
-        `personId` INT(11) UNSIGNED NOT NULL,
-        `processDefinitionId` INT(11) UNSIGNED NOT NULL,
+        `person_id` INT(11) UNSIGNED NOT NULL,
+        `process_definition_id` INT(11) UNSIGNED NOT NULL,
         `current_status` VARCHAR(255) NOT NULL DEFAULT 'none',
         `current_node_id` VARCHAR(255),
         `current_reason` TEXT,
         `suggested_next_step` TEXT,
         `data_json` TEXT,
         `lastActivityAt` TIMESTAMP NULL,
-        FOREIGN KEY (personId) REFERENCES people(id) ON DELETE CASCADE,
-        FOREIGN KEY (processDefinitionId) REFERENCES process_definitions(id) ON DELETE CASCADE,
-        UNIQUE KEY `person_process` (`personId`, `processDefinitionId`)
+        FOREIGN KEY (person_id) REFERENCES people(id) ON DELETE CASCADE,
+        FOREIGN KEY (process_definition_id) REFERENCES process_definitions(id) ON DELETE CASCADE,
+        UNIQUE KEY `person_process` (`person_id`, `process_definition_id`)
     )");
     echo "Process instances table created or already exists.\n";
 
@@ -121,6 +121,7 @@ try {
         $pdo->exec("ALTER TABLE `process_instances` CHANGE `contactId` `personId` INT(11) UNSIGNED NOT NULL;");
         echo "Migrated process_instances: contactId -> personId.\n";
     }
+
     
     // Drop old tables if they exist
     $pdo->exec("DROP TABLE IF EXISTS `users`, `contacts`;");
diff --git a/index.php b/index.php
index e4456b8..5eb3fe5 100644
--- a/index.php
+++ b/index.php
@@ -1,4 +1,5 @@
 <?php
+session_start();
 require_once 'WorkflowEngine.php';
 
 $workflowEngine = new WorkflowEngine();
@@ -15,7 +16,8 @@ $stmt = $pdo->query("
 $people = $stmt->fetchAll(PDO::FETCH_ASSOC);
 
 // Fetch process definitions
-$stmt = $pdo->prepare("SELECT * FROM process_definitions WHERE name NOT IN (?, ?) ORDER BY name");
+$stmt = $pdo->prepare("SELECT * FROM process_definitions WHERE name NOT IN (?, ?)"
+    . " ORDER BY name");
 $stmt->execute(['Obsluga goscia', 'Przygotowanie spotkania grupy']);
 $processes = $stmt->fetchAll(PDO::FETCH_ASSOC);
 
@@ -31,10 +33,14 @@ foreach ($all_instances as $instance) {
 
 
 $status_colors = [
-    'none' => 'secondary',
-    'negative' => 'danger',
-    'in_progress' => 'warning',
-    'positive' => 'success',
+    'completed' => '#28a745',
+    'positive' => '#28a745',
+    'in_progress' => '#fd7e14',
+    'negative' => '#dc3545',
+    'error' => '#dc3545',
+    'none' => '#808080',
+    'not_started' => '#808080',
+    'inactive' => '#808080',
 ];
 
 $pdo = db();
@@ -65,167 +71,216 @@ $bni_groups = $stmt_bni_groups->fetchAll(PDO::FETCH_ASSOC);
         <?php include '_sidebar.php'; ?>
 
         <main class="col-md-9 ms-sm-auto col-lg-10 px-md-4">
-            <?php if (isset($_SESSION['success_message'])): ?>
-            <div class="alert alert-success alert-dismissible fade show mt-3" role="alert">
-                <?= $_SESSION['success_message']; ?>
-                <button type="button" class="btn-close" data-bs-dismiss="alert" aria-label="Close"></button>
-            </div>
-            <?php unset($_SESSION['success_message']); ?>
-            <?php endif; ?>
+            <div id="main-dashboard-view">
+                <?php if (isset($_SESSION['success_message'])): ?>
+                <div class="alert alert-success alert-dismissible fade show mt-3" role="alert">
+                    <?= $_SESSION['success_message']; ?>
+                    <button type="button" class="btn-close" data-bs-dismiss="alert" aria-label="Close"></button>
+                </div>
+                <?php unset($_SESSION['success_message']); ?>
+                <?php endif; ?>
 
-            <?php if (isset($_SESSION['error_message'])): ?>
-            <div class="alert alert-danger alert-dismissible fade show mt-3" role="alert">
-                <?= $_SESSION['error_message']; ?>
-                <button type="button" class="btn-close" data-bs-dismiss="alert" aria-label="Close"></button>
-            </div>
-            <?php unset($_SESSION['error_message']); ?>
-            <?php endif; ?>
+                <?php if (isset($_SESSION['error_message'])): ?>
+                <div class="alert alert-danger alert-dismissible fade show mt-3" role="alert">
+                    <?= $_SESSION['error_message']; ?>
+                    <button type="button" class="btn-close" data-bs-dismiss="alert" aria-label="Close"></button>
+                </div>
+                <?php unset($_SESSION['error_message']); ?>
+                <?php endif; ?>
 
-            <div class="d-flex justify-content-between align-items-center pt-3 pb-2 mb-3 border-bottom">
-                <h1 class="h2">Dashboard</h1>
-                <div class="btn-toolbar mb-2 mb-md-0">
-                    <div class="btn-group me-2" id="bulk-actions-group" style="display: none;">
-                        <button type="button" class="btn btn-primary dropdown-toggle" data-bs-toggle="dropdown" aria-expanded="false">
-                            Bulk Actions
+                <div class="d-flex justify-content-between align-items-center pt-3 pb-2 mb-3 border-bottom">
+                    <h1 class="h2">Dashboard</h1>
+                    <div class="btn-toolbar mb-2 mb-md-0">
+                        <div class="btn-group me-2" id="bulk-actions-group" style="display: none;">
+                            <button type="button" class="btn btn-primary dropdown-toggle" data-bs-toggle="dropdown" aria-expanded="false">
+                                Bulk Actions
+                            </button>
+                            <ul class="dropdown-menu">
+                                <li><a class="dropdown-item" href="#" data-bs-toggle="modal" data-bs-target="#bulkStatusModal">Bulk Status Update</a></li>
+                                <li><a class="dropdown-item" href="#" data-bs-toggle="modal" data-bs-target="#bulkEventModal">Bulk Add Event</a></li>
+                                <li><a class="dropdown-item" href="#" data-bs-toggle="modal" data-bs-target="#bulkInitModal">Bulk Initialize Instances</a></li>
+                            </ul>
+                        </div>
+                        <button type="button" class="btn btn-success" data-bs-toggle="modal" data-bs-target="#createPersonModal">
+                            Create Person
                         </button>
-                        <ul class="dropdown-menu">
-                            <li><a class="dropdown-item" href="#" data-bs-toggle="modal" data-bs-target="#bulkStatusModal">Bulk Status Update</a></li>
-                            <li><a class="dropdown-item" href="#" data-bs-toggle="modal" data-bs-target="#bulkEventModal">Bulk Add Event</a></li>
-                            <li><a class="dropdown-item" href="#" data-bs-toggle="modal" data-bs-target="#bulkInitModal">Bulk Initialize Instances</a></li>
-                        </ul>
                     </div>
-                    <button type="button" class="btn btn-success" data-bs-toggle="modal" data-bs-target="#createPersonModal">
-                        Create Person
-                    </button>
+                </div>
+
+                <?php
+                // Define process groups
+                // Show all processes from the DB directly.
+                $inne_procesy_cols = $processes;
+
+
+                // --- Spotkania Columns ---
+                // Fetch upcoming meetings for each group
+                $today = date('Y-m-d H:i:s');
+                $stmt_meetings = $pdo->prepare("
+                    SELECT bni_groups.id as group_id, bni_groups.name as group_name, MIN(calendar_events.start_datetime) as next_meeting_date
+                    FROM bni_groups
+                    LEFT JOIN calendar_event_groups ON bni_groups.id = calendar_event_groups.bni_group_id
+                    LEFT JOIN calendar_events ON calendar_event_groups.calendar_event_id = calendar_events.id AND calendar_events.start_datetime >= :today
+                    GROUP BY bni_groups.id
+                    ORDER BY bni_groups.name
+                ");
+                $stmt_meetings->execute(['today' => $today]);
+                $spotkania_cols = $stmt_meetings->fetchAll(PDO::FETCH_ASSOC);
+                ?>
+
+                <div class="mb-3">
+                    <label for="groupFilter" class="form-label">Filter by Group</label>
+                    <select class="form-select" id="groupFilter">
+                        <option value="">All Groups</option>
+                        <?php foreach ($bni_groups as $group): ?>
+                            <option value="<?= $group['id'] ?>"><?= htmlspecialchars($group['name']) ?></option>
+                        <?php endforeach; ?>
+                    </select>
+                </div>
+
+                <div class="table-responsive">
+                    <?php
+                        // Fetch ID for the meeting process to make headers clickable
+                        $stmt_meeting_process = $pdo->prepare("SELECT id FROM process_definitions WHERE name = ?");
+                        $stmt_meeting_process->execute(['Przygotowanie spotkania grupy']);
+                        $meeting_process = $stmt_meeting_process->fetch(PDO::FETCH_ASSOC);
+                        $meeting_process_id = $meeting_process ? $meeting_process['id'] : 'null';
+                    ?>
+                    <table class="table table-bordered table-sm">
+                        <thead class="table-light">
+                            <tr class="text-center">
+                                <th rowspan="2" class="align-middle"><input type="checkbox" id="selectAll"></th>
+                                <th rowspan="2" class="align-middle">Person</th>
+                                <?php if (!empty($spotkania_cols)): ?>
+                                    <th id="spotkania-header" colspan="<?= count($spotkania_cols) ?>">Spotkania</th>
+                                <?php endif; ?>
+                                <?php if (!empty($inne_procesy_cols)): ?>
+                                    <th colspan="<?= count($inne_procesy_cols) ?>">Inne procesy</th>
+                                <?php endif; ?>
+                            </tr>
+                            <tr class="text-center" id="processes-header-row">
+                                <?php foreach ($spotkania_cols as $index => $col): ?>
+                                    <th class="process-header-clickable" data-process-id="<?= $meeting_process_id ?>" style="cursor: pointer;" data-group-id="<?= $col['group_id'] ?>" data-col-index="<?= $index ?>">
+                                        <?= htmlspecialchars($col['group_name']) ?><br>
+                                        <small>
+                                            <?= $col['next_meeting_date'] ? date('d.m.Y', strtotime($col['next_meeting_date'])) : 'Brak' ?>
+                                            <?php if($col['next_meeting_date']): ?>
+                                            <i class="bi bi-arrow-right-short expand-meeting" style="cursor: pointer;" data-group-id="<?= $col['group_id'] ?>"></i>
+                                            <?php endif; ?>
+                                        </small>
+                                    </th>
+                                <?php endforeach; ?>
+                                <?php foreach ($inne_procesy_cols as $col): ?>
+                                    <th class="process-header-clickable" data-process-id="<?= $col['id'] ?>" style="cursor: pointer;"><?= htmlspecialchars($col['name']) ?></th>
+                                <?php endforeach; ?>
+                            </tr>
+                        </thead>
+                        <tbody>
+                        <?php foreach ($people as $person): ?>
+                            <tr data-group-id="<?= $person['bni_group_id'] ?>">
+                                <td class="text-center align-middle"><input type="checkbox" class="person-checkbox" name="personIds[]" value="<?= $person['id'] ?>"></td>
+                                <td class="person-cell">
+                                    <div class="person-main">
+                                        <div class="person-name"><?= htmlspecialchars($person['firstName'] . ' ' . $person['lastName']) ?></div>
+                                        <div class="person-details">
+                                            <span class="d-block"><?= htmlspecialchars($person['companyName']) ?></span>
+                                            <span class="d-block"><?= htmlspecialchars($person['industry'] ?? '') ?></span>
+                                            <span><?= htmlspecialchars(ucfirst($person['role'])) ?></span>
+                                            <?php if ($person['role'] === 'member' && !empty($person['bni_group_name'])): ?>
+                                                <span class="person-group">, Grupa: <?= htmlspecialchars($person['bni_group_name']) ?></span>
+                                            <?php endif; ?>
+                                        </div>
+                                    </div>
+                                    <div class="person-actions">
+                                        <div class="status-dots">
+                                            <?php if ($person['role'] === 'member'): ?>
+                                                <span class="status-dot <?= !empty($person['gains_sheet_path']) ? 'bg-success' : 'bg-danger' ?>" title="GAINS Sheet"></span>
+                                                <span class="status-dot <?= !empty($person['top_wanted_contacts_path']) ? 'bg-success' : 'bg-danger' ?>" title="Top Wanted Contacts"></span>
+                                                <span class="status-dot <?= !empty($person['top_owned_contacts_path']) ? 'bg-success' : 'bg-danger' ?>" title="Top Owned Contacts"></span>
+                                            <?php endif; ?>
+                                        </div>
+                                        <button class="btn btn-sm btn-secondary edit-btn" data-bs-toggle="modal" data-bs-target="#editPersonModal"
+                                                data-person-id="<?= $person['id'] ?>"
+                                                data-person-name="<?= htmlspecialchars($person['firstName'] . ' ' . $person['lastName']) ?>">
+                                            Edit
+                                        </button>
+                                    </div>
+                                </td>
+                                
+                                <?php // Spotkania Columns ?>
+                                <?php foreach ($spotkania_cols as $index => $col): ?>
+                                    <td class="text-center align-middle meeting-cell" data-group-id="<?= $col['group_id'] ?>" data-col-index="<?= $index ?>">
+                                        <?php
+                                        // Placeholder Status: Logic for meeting attendance is not yet defined.
+                                        // Display icon only if the person belongs to the group for that column.
+                                        if ($person['bni_group_id'] == $col['group_id']) {
+                                            $status = 'none'; // Default/placeholder status
+                                            $color = $status_colors[$status] ?? '#808080';
+                                            echo "<span style='width: 20px; height: 20px; display: inline-block; border-radius: 50%; background-color: $color;' title='Status nieokreślony'></span>";
+                                        } else {
+                                            echo ''; // Empty cell if person is not in this group
+                                        }
+                                        ?>
+                                    </td>
+                                <?php endforeach; ?>
+
+                                <?php // Inne Procesy Columns ?>
+                                <?php foreach ($inne_procesy_cols as $process):
+                                    $instance = $instances[$person['id']][$process['id']] ?? null;
+                                    $definition = isset($process['definition_json']) ? json_decode($process['definition_json'], true) : null;
+                                    $isChecklist = ($definition && isset($definition['type']) && $definition['type'] === 'checklist');
+                                    $lastActivity = $instance && $instance['lastActivityAt'] ? date('d/m/y', strtotime($instance['lastActivityAt'])) : '';
+
+                                    $color = $status_colors['inactive'];
+                                    $title = 'Inactive';
+
+                                    if ($isChecklist) {
+                                        $status = 'inactive';
+                                        if ($instance) {
+                                            $tasks = $definition['tasks'] ?? [];
+                                            $instanceData = $instance['data_json'] ? json_decode($instance['data_json'], true) : [];
+                                            $totalTasks = count($tasks);
+                                            $completedTasks = 0;
+                                            foreach ($tasks as $task) {
+                                                if (!empty($instanceData[$task['code']])) {
+                                                    $completedTasks++;
+                                                }
+                                            }
+
+                                            $title = "$completedTasks/$totalTasks completed";
+                                            if ($totalTasks > 0 && $completedTasks === $totalTasks) {
+                                                $status = 'completed';
+                                            } elseif ($completedTasks > 0) {
+                                                $status = 'in_progress';
+                                            } else {
+                                                $status = 'inactive'; // Initialized but no progress
+                                            }
+                                        }
+                                        $color = $status_colors[$status] ?? $status_colors['inactive'];
+                                        ?>
+                                        <td class="align-middle checklist-cell text-center" style="cursor: pointer;" data-bs-toggle="modal" data-bs-target="#instanceModal" data-person-id="<?= $person['id'] ?>" data-process-id="<?= $process['id'] ?>" data-instance-id="<?= $instance['id'] ?? '' ?>">
+                                            <span title="<?= $title ?>" style="height: 20px; width: 20px; background-color: <?= $color ?>; border-radius: 50%; display: inline-block;"></span>
+                                            <small class="text-muted d-block last-activity-date mt-1"><?= $lastActivity ?></small>
+                                        </td>
+                                    <?php } else {
+                                        $status = $instance ? $instance['current_status'] : 'inactive';
+                                        $color = $status_colors[$status] ?? $status_colors['inactive'];
+                                        $title = ucfirst($status);
+                                        ?>
+                                        <td class="text-center align-middle" style="cursor: pointer;" data-bs-toggle="modal" data-bs-target="#instanceModal" data-person-id="<?= $person['id'] ?>" data-process-id="<?= $process['id'] ?>">
+                                            <span title="<?= $title ?>" style="height: 20px; width: 20px; background-color: <?= $color ?>; border-radius: 50%; display: inline-block;"></span>
+                                            <small class="text-muted d-block mt-1"><?= $lastActivity ?></small>
+                                        </td>
+                                    <?php }
+                                endforeach; ?>
+                            </tr>
+                        <?php endforeach; ?>
+                        </tbody>
+                    </table>
                 </div>
             </div>
-
-            <?php
-            // Define process groups
-            // Show all processes from the DB directly.
-            $inne_procesy_cols = $processes;
-            $inne_procesy_cols[] = ['id' => 'temp_szkolenia', 'name' => 'Szkolenia dla nowego członka'];
-
-            // --- Spotkania Columns ---
-            // Fetch upcoming meetings for each group
-            $today = date('Y-m-d H:i:s');
-            $stmt_meetings = $pdo->prepare("
-                SELECT bni_groups.id as group_id, bni_groups.name as group_name, MIN(calendar_events.start_datetime) as next_meeting_date
-                FROM bni_groups
-                LEFT JOIN calendar_event_groups ON bni_groups.id = calendar_event_groups.bni_group_id
-                LEFT JOIN calendar_events ON calendar_event_groups.calendar_event_id = calendar_events.id AND calendar_events.start_datetime >= :today
-                GROUP BY bni_groups.id
-                ORDER BY bni_groups.name
-            ");
-            $stmt_meetings->execute(['today' => $today]);
-            $spotkania_cols = $stmt_meetings->fetchAll(PDO::FETCH_ASSOC);
-            ?>
-
-            <div class="mb-3">
-                <label for="groupFilter" class="form-label">Filter by Group</label>
-                <select class="form-select" id="groupFilter">
-                    <option value="">All Groups</option>
-                    <?php foreach ($bni_groups as $group): ?>
-                        <option value="<?= $group['id'] ?>"><?= htmlspecialchars($group['name']) ?></option>
-                    <?php endforeach; ?>
-                </select>
-            </div>
-
-            <div class="table-responsive">
-                <table class="table table-bordered table-sm">
-                    <thead class="table-light">
-                        <tr class="text-center">
-                            <th rowspan="2" class="align-middle"><input type="checkbox" id="selectAll"></th>
-                            <th rowspan="2" class="align-middle">Person</th>
-                            <?php if (!empty($spotkania_cols)): ?>
-                                <th id="spotkania-header" colspan="<?= count($spotkania_cols) ?>">Spotkania</th>
-                            <?php endif; ?>
-                            <?php if (!empty($inne_procesy_cols)): ?>
-                                <th colspan="<?= count($inne_procesy_cols) ?>">Inne procesy</th>
-                            <?php endif; ?>
-                        </tr>
-                        <tr class="text-center" id="processes-header-row">
-                            <?php foreach ($spotkania_cols as $index => $col): ?>
-                                <th data-group-id="<?= $col['group_id'] ?>" data-col-index="<?= $index ?>">
-                                    <?= htmlspecialchars($col['group_name']) ?><br>
-                                    <small>
-                                        <?= $col['next_meeting_date'] ? date('d.m.Y', strtotime($col['next_meeting_date'])) : 'Brak' ?>
-                                        <?php if($col['next_meeting_date']): ?>
-                                        <i class="bi bi-arrow-right-short expand-meeting" style="cursor: pointer;" data-group-id="<?= $col['group_id'] ?>"></i>
-                                        <?php endif; ?>
-                                    </small>
-                                </th>
-                            <?php endforeach; ?>
-                            <?php foreach ($inne_procesy_cols as $col): ?>
-                                <th><?= htmlspecialchars($col['name']) ?></th>
-                            <?php endforeach; ?>
-                        </tr>
-                    </thead>
-                    <tbody>
-                    <?php foreach ($people as $person): ?>
-                        <tr data-group-id="<?= $person['bni_group_id'] ?>">
-                            <td class="text-center align-middle"><input type="checkbox" class="person-checkbox" name="person_ids[]" value="<?= $person['id'] ?>"></td>
-                            <td class="person-cell">
-                                <div class="person-main">
-                                    <div class="person-name"><?= htmlspecialchars($person['firstName'] . ' ' . $person['lastName']) ?></div>
-                                    <div class="person-details">
-                                        <span class="d-block"><?= htmlspecialchars($person['companyName']) ?></span>
-                                        <span class="d-block"><?= htmlspecialchars($person['industry'] ?? '') ?></span>
-                                        <span><?= htmlspecialchars(ucfirst($person['role'])) ?></span>
-                                        <?php if ($person['role'] === 'member' && !empty($person['bni_group_name'])): ?>
-                                            <span class="person-group">, Grupa: <?= htmlspecialchars($person['bni_group_name']) ?></span>
-                                        <?php endif; ?>
-                                    </div>
-                                </div>
-                                <div class="person-actions">
-                                    <div class="status-dots">
-                                        <?php if ($person['role'] === 'member'): ?>
-                                            <span class="status-dot <?= !empty($person['gains_sheet_path']) ? 'bg-success' : 'bg-danger' ?>" title="GAINS Sheet"></span>
-                                            <span class="status-dot <?= !empty($person['top_wanted_contacts_path']) ? 'bg-success' : 'bg-danger' ?>" title="Top Wanted Contacts"></span>
-                                            <span class="status-dot <?= !empty($person['top_owned_contacts_path']) ? 'bg-success' : 'bg-danger' ?>" title="Top Owned Contacts"></span>
-                                        <?php endif; ?>
-                                    </div>
-                                    <button class="btn btn-sm btn-secondary edit-btn" data-bs-toggle="modal" data-bs-target="#editPersonModal"
-                                            data-person-id="<?= $person['id'] ?>"
-                                            data-person-name="<?= htmlspecialchars($person['firstName'] . ' ' . $person['lastName']) ?>">
-                                        Edit
-                                    </button>
-                                </div>
-                            </td>
-                            
-                            <?php // Spotkania Columns ?>
-                            <?php foreach ($spotkania_cols as $index => $col): ?>
-                                <td class="text-center align-middle meeting-cell" data-group-id="<?= $col['group_id'] ?>" data-col-index="<?= $index ?>">
-                                    <?php
-                                    // Placeholder Status: Logic for meeting attendance is not yet defined.
-                                    // Display icon only if the person belongs to the group for that column.
-                                    if ($person['bni_group_id'] == $col['group_id']) {
-                                        $status = 'none'; // Default/placeholder status
-                                        $color = $status_colors[$status];
-                                        echo "<span class=\"badge rounded-circle bg-$color\" style=\"width: 20px; height: 20px; display: inline-block;\" title=\"Status nieokreślony\"></span>";
-                                    } else {
-                                        echo ''; // Empty cell if person is not in this group
-                                    }
-                                    ?>
-                                </td>
-                            <?php endforeach; ?>
-
-                            <?php // Inne Procesy Columns ?>
-                            <?php foreach ($inne_procesy_cols as $process):
-                                $instance = $instances[$person['id']][$process['id']] ?? null;
-                                $status = $instance ? $instance['current_status'] : 'none';
-                                $color = $status_colors[$status];
-                                $lastActivity = $instance && $instance['lastActivityAt'] ? date('d/m/y', strtotime($instance['lastActivityAt'])) : '';
-                            ?>
-                                <td class="text-center align-middle" data-bs-toggle="modal" data-bs-target="#instanceModal" data-person-id="<?= $person['id'] ?>" data-process-id="<?= $process['id'] ?>">
-                                    <span class="badge rounded-circle bg-<?= $color ?>" style="width: 20px; height: 20px; display: inline-block;" title="<?= ucfirst($status) ?>">&nbsp;</span>
-                                    <small class="text-muted d-block"><?= $lastActivity ?></small>
-                                </td>
-                            <?php endforeach; ?>
-                        </tr>
-                    <?php endforeach; ?>
-                    </tbody>
-                </table>
+            <div id="process-detail-view" style="display: none;">
+                <!-- This will be populated dynamically -->
             </div>
         </main>
     </div>
@@ -523,40 +578,176 @@ $bni_groups = $stmt_bni_groups->fetchAll(PDO::FETCH_ASSOC);
 
 <script>
 document.addEventListener('DOMContentLoaded', function () {
+    // --- Injected PHP Data ---
+    const peopleData = <?= json_encode($people) ?>;
+
     // --- STATE MANAGEMENT ---
     const meetingsState = {};
 
     // --- MODAL LOGIC ---
     const instanceModal = document.getElementById('instanceModal');
+    let currentPersonId = null;
+    let currentProcessId = null;
+
     if (instanceModal) {
+        // Event listener for when the modal is about to be shown
         instanceModal.addEventListener('show.bs.modal', function (event) {
             const button = event.relatedTarget;
-            const personId = button.getAttribute('data-person-id');
-            const processId = button.getAttribute('data-process-id');
+            currentPersonId = button.getAttribute('data-person-id');
+            currentProcessId = button.getAttribute('data-process-id');
+            
             const modalBody = instanceModal.querySelector('.modal-body');
             const modalTitle = instanceModal.querySelector('.modal-title');
 
             modalBody.innerHTML = '<div class="d-flex justify-content-center"><div class="spinner-border" role="status"><span class="visually-hidden">Loading...</span></div></div>';
             modalTitle.textContent = 'Ładowanie...';
 
-            fetch(`_get_instance_details.php?person_id=${personId}&process_id=${processId}`)
-                .then(response => response.text())
-                .then(html => {
-                    modalBody.innerHTML = html;
-                    const newTitle = modalBody.querySelector('#instance-modal-title');
-                    if (newTitle) {
-                        modalTitle.innerHTML = newTitle.innerHTML;
-                        newTitle.remove();
-                    } else {
-                        modalTitle.textContent = 'Szczegóły procesu';
-                    }
-                })
-                .catch(error => {
-                    console.error('Error fetching instance details:', error);
-                    modalBody.innerHTML = '<p class="text-danger">Wystąpił błąd podczas ładowania danych.</p>';
-                    modalTitle.textContent = 'Błąd';
-                });
+            // Fetch and display the initial modal content
+            fetchAndRenderModalContent(currentPersonId, currentProcessId);
         });
+
+        // Event listener for when the modal has been hidden
+        instanceModal.addEventListener('hidden.bs.modal', function () {
+            location.reload(); // Reload the main page to reflect any changes
+        });
+
+        // Delegated event listener for all actions within the modal
+        instanceModal.addEventListener('click', function(event) {
+            const transitionBtn = event.target.closest('.apply-transition-btn');
+            if (transitionBtn) {
+                handleTransition(transitionBtn);
+                return;
+            }
+    
+            const noteBtn = event.target.closest('#addNoteBtn');
+            if (noteBtn) {
+                handleAddNote(noteBtn);
+                return;
+            }
+        });
+
+        instanceModal.addEventListener('change', function(event) {
+            const checkbox = event.target.closest('.task-checkbox-modal');
+            if (checkbox) {
+                handleCheckboxChange(checkbox);
+                return;
+            }
+        });
+    }
+
+    // --- HELPER FUNCTIONS FOR MODAL ---
+
+    function fetchAndRenderModalContent(personId, processId) {
+        const modalBody = instanceModal.querySelector('.modal-body');
+        const modalTitle = instanceModal.querySelector('.modal-title');
+
+        fetch(`_get_instance_details.php?personId=${personId}&processId=${processId}`)
+            .then(response => response.text())
+            .then(html => {
+                modalBody.innerHTML = html;
+                const newTitleEl = modalBody.querySelector('#instance-modal-title');
+                if (newTitleEl) {
+                    modalTitle.innerHTML = newTitleEl.innerHTML;
+                    newTitleEl.remove();
+                } else {
+                    modalTitle.textContent = 'Szczegóły procesu';
+                }
+            })
+            .catch(error => {
+                console.error('Error fetching instance details:', error);
+                modalBody.innerHTML = '<p class="text-danger">Wystąpił błąd podczas ładowania danych.</p>';
+                modalTitle.textContent = 'Błąd';
+            });
+    }
+
+    function handleCheckboxChange(checkbox) {
+        const taskCode = checkbox.dataset.taskCode;
+        const isChecked = checkbox.checked;
+        const instanceId = checkbox.closest('.modal-body').querySelector('[data-instance-id]').dataset.instanceId;
+
+        fetch('_update_training_checklist_status.php', {
+            method: 'POST',
+            headers: { 'Content-Type': 'application/json', 'Accept': 'application/json' },
+            body: JSON.stringify({
+                instance_id: instanceId,
+                task_code: taskCode,
+                is_checked: isChecked
+            })
+        })
+        .then(response => {
+            if (!response.ok) {
+                throw new Error('Network response was not ok');
+            }
+            return response.json();
+        })
+        .then(data => {
+            if (!data.success) {
+                console.error('Failed to update checklist status:', data.error);
+                checkbox.checked = !isChecked; // Revert on failure
+                alert('Error updating status: ' + data.error);
+            }
+            // No reload on success, keep modal open
+        })
+        .catch(error => {
+            console.error('Network or server error during checklist update:', error);
+            checkbox.checked = !isChecked; // Revert on network error
+            alert('A network error occurred. Please try again.');
+        });
+    }
+
+    function handleTransition(button) {
+        const instanceId = button.dataset.instanceId;
+        const transitionId = button.dataset.transitionId;
+    
+        if (!confirm(`Czy na pewno chcesz wykonać akcję \"'''${button.textContent.trim()}'''\"?`)) {
+            return;
+        }
+    
+        const formData = new FormData();
+        formData.append('instanceId', instanceId);
+        formData.append('transitionId', transitionId);
+        submitRequestAndReloadModal('_apply_transition.php', formData);
+    }
+
+    function handleAddNote(button) {
+        const instanceId = button.dataset.instanceId;
+        const message = document.getElementById('noteMessage').value;
+    
+        if (!message.trim()) {
+            alert('Proszę wpisać treść notatki.');
+            return;
+        }
+    
+        const formData = new FormData();
+        formData.append('instanceId', instanceId);
+        formData.append('transitionId', 'note'); // Special transitionId
+        formData.append('payload[message]', message);
+        submitRequestAndReloadModal('_apply_transition.php', formData);
+    }
+
+    function submitRequestAndReloadModal(url, formData) {
+        const modalBody = instanceModal.querySelector('.modal-body');
+        showLoading(modalBody);
+    
+        fetch(url, {
+            method: 'POST',
+            body: formData
+        })
+        .then(response => {
+            if (!response.ok) {
+                throw new Error('Network response was not ok');
+            }
+            // Reload modal content after successful submission
+            fetchAndRenderModalContent(currentPersonId, currentProcessId);
+        })
+        .catch(error => {
+            console.error('Error submitting request:', error);
+            modalBody.innerHTML = `<div class="alert alert-danger">Wystąpił błąd sieciowy.</div>`;
+        });
+    }
+
+    function showLoading(element) {
+        element.innerHTML = '<div class="d-flex justify-content-center align-items-center" style="min-height: 200px;"><div class="spinner-border" role="status"><span class="visually-hidden">Loading...</span></div></div>';
     }
 
     // --- GROUP FILTER LOGIC ---
@@ -577,6 +768,8 @@ document.addEventListener('DOMContentLoaded', function () {
         headerRow.addEventListener('click', function (event) {
             const expandBtn = event.target.closest('.expand-meeting');
             if (!expandBtn) return;
+            
+            event.stopPropagation(); // Prevent the click from bubbling up to the process-header-clickable listener
 
             const groupId = expandBtn.dataset.groupId;
             expandBtn.style.display = 'none';
@@ -614,7 +807,6 @@ document.addEventListener('DOMContentLoaded', function () {
                             const meetingDate = new Date(meeting.start_datetime);
                             const formattedDate = meetingDate.toLocaleDateString('pl-PL', { day: '2-digit', month: '2-digit', year: 'numeric' });
 
-                            // In a real scenario, you'd get this info from the backend
                             const isLastInBatch = false; 
                             const isLastInGroup = false;
 
@@ -669,6 +861,8 @@ document.addEventListener('DOMContentLoaded', function () {
                 });
         });
     }
+
+
     
     function findLastElementForGroup(parent, selector, groupId, findFirst = false) {
         const elements = parent.querySelectorAll(`${selector}[data-group-id="${groupId}"]`);
@@ -678,14 +872,74 @@ document.addEventListener('DOMContentLoaded', function () {
 
     function htmlspecialchars(str) {
         if (typeof str !== 'string') return '';
-        return str.replace(/[&<>"']/g, match => ({
+        return str.replace(/[&<>"]/g, match => ({
             '&': '&amp;',
             '<': '&lt;',
             '>': '&gt;',
-            '"': '&quot;',
-            "'": '&#039;'
+            '"': '&quot;'
         }[match]));
     }
+
+    // --- PROCESS BULK VIEW LOGIC ---
+
+    const processDetailView = document.getElementById('process-detail-view');
+
+    function renderProcessDetailView(data) {
+        const { process, steps, instances } = data;
+
+        let tableHtml = `<div class="d-flex justify-content-between align-items-center pt-3 pb-2 mb-3 border-bottom">
+                            <h1 class="h2">Process: ${htmlspecialchars(process.name)}</h1>
+                            <button class="btn btn-secondary" id="back-to-dashboard">Back to Dashboard</button>
+                         </div>`;
+
+        tableHtml += '<div class="table-responsive"><table class="table table-bordered table-sm">';
+        
+        tableHtml += '<thead class="table-light"><tr><th>Person</th>';
+        steps.forEach(step => {
+            tableHtml += `<th>${htmlspecialchars(step.name)}</th>`;
+        });
+        tableHtml += '</tr></thead>';
+
+        tableHtml += '<tbody>';
+        instances.forEach(instance => {
+            const person = peopleData.find(p => p.id == instance.personId);
+            if (!person) return;
+
+            tableHtml += `<tr><td class="person-cell">
+                             <div class="person-main">
+                                 <div class="person-name">${htmlspecialchars(person.firstName + ' ' + person.lastName)}</div>
+                             </div>
+                          </td>`;
+            
+            steps.forEach(step => {
+                const stepState = instance.steps.find(s => s.step_id == step.id);
+                const status = stepState ? stepState.status : 'pending';
+                const statusColors = {
+                    pending: 'secondary',
+                    in_progress: 'warning',
+                    completed: 'success',
+                    skipped: 'light',
+                    failed: 'danger'
+                };
+                const color = statusColors[status] || 'secondary';
+
+                tableHtml += `<td class="text-center align-middle">
+                                <span class="badge rounded-circle bg-${color}" style="width: 20px; height: 20px; display: inline-block;" title="${status}">&nbsp;</span>
+                              </td>`;
+            });
+
+            tableHtml += '</tr>';
+        });
+        tableHtml += '</tbody></table></div>';
+        
+        processDetailView.innerHTML = tableHtml;
+
+        document.getElementById('back-to-dashboard').addEventListener('click', () => {
+            processDetailView.style.display = 'none';
+            mainDashboardView.style.display = 'block';
+            processDetailView.innerHTML = '';
+        });
+    }
 });
 </script>
 
@@ -700,7 +954,7 @@ document.addEventListener('DOMContentLoaded', function () {
             </div>
             <div class="modal-body">
                 <form action="_bulk_update_status.php" method="post">
-                    <input type="hidden" name="person_ids" id="bulkStatusPersonIds">
+                    <input type="hidden" name="personIds" id="bulkStatusPersonIds">
                     <div class="mb-3">
                         <label class="form-label">Process</label>
                         <select name="process_id" class="form-select" required>
@@ -735,7 +989,7 @@ document.addEventListener('DOMContentLoaded', function () {
             </div>
             <div class="modal-body">
                  <form action="_bulk_add_event.php" method="post">
-                    <input type="hidden" name="person_ids" id="bulkEventPersonIds">
+                    <input type="hidden" name="personIds" id="bulkEventPersonIds">
                      <div class="mb-3">
                         <label class="form-label">Process</label>
                         <select name="process_id" class="form-select" required>
@@ -765,7 +1019,7 @@ document.addEventListener('DOMContentLoaded', function () {
             </div>
             <div class="modal-body">
                 <form action="_bulk_init_instances.php" method="post">
-                    <input type="hidden" name="person_ids" id="bulkInitPersonIds">
+                    <input type="hidden" name="personIds" id="bulkInitPersonIds">
                      <div class="mb-3">
                         <label class="form-label">Process</label>                        <select name="process_id" class="form-select" required>
                             <?php foreach($processes as $process): ?>
@@ -779,4 +1033,4 @@ document.addEventListener('DOMContentLoaded', function () {
             </div>
         </div>
     </div>
-</div>
\ No newline at end of file
+</div>
diff --git a/test_workflow.php b/test_workflow.php
new file mode 100644
index 0000000..f59ae67
--- /dev/null
+++ b/test_workflow.php
@@ -0,0 +1,54 @@
+<?php
+// test_workflow.php
+error_reporting(E_ALL);
+ini_set('display_errors', 1);
+
+require_once 'WorkflowEngine.php';
+require_once 'db/config.php'; // Include the database configuration
+
+echo "Testing WorkflowEngine...<br>";
+
+// Establish a direct database connection for setup
+$pdo = db();
+
+// 1. Get the first person from the database
+$stmt = $pdo->query("SELECT id FROM people LIMIT 1");
+$person = $stmt->fetch(PDO::FETCH_ASSOC);
+if (!$person) {
+    die("<b>Error:</b> No people found in the database. Please run `db_setup.php` or ensure the database is seeded correctly.<br>");
+}
+$personId = $person['id'];
+echo "Prerequisite check: Using person with ID $personId.<br>";
+
+// 2. Get the first process definition from the database
+$stmt = $pdo->query("SELECT id FROM process_definitions LIMIT 1");
+$process = $stmt->fetch(PDO::FETCH_ASSOC);
+if (!$process) {
+    die("<b>Error:</b> No process definitions found in the database. Please run `db_setup.php` or ensure the database is seeded correctly.<br>");
+}
+$processDefinitionId = $process['id'];
+echo "Prerequisite check: Using process definition with ID $processDefinitionId.<br>";
+
+
+$engine = new WorkflowEngine();
+$userId = $personId;
+
+echo "Attempting to get or create instance with personId: $personId and processDefinitionId: $processDefinitionId<br>";
+
+try {
+    $instance = $engine->getOrCreateInstanceByDefId($personId, $processDefinitionId, $userId);
+
+    if ($instance) {
+        echo "<b>Success!</b> Successfully got or created instance:<br>";
+        echo "<pre>";
+        print_r($instance);
+        echo "</pre>";
+    } else {
+        echo "<b>Error:</b> Failed to get or create instance, but no exception was thrown.<br>";
+        echo "This might happen if the process definition exists, but `startProcess` fails internally.<br>";
+        echo "Check PHP error logs for more details.<br>";
+    }
+} catch (Exception $e) {
+    echo "An exception occurred: " . $e->getMessage() . "<br>";
+    echo "Stack trace:<br><pre>" . $e->getTraceAsString() . "</pre>";
+}
\ No newline at end of file