Merge branch 'feature/project-gantt-chart' of https://github.com/Worklenz/worklenz into test/invitation-process

worklenz-frontend/src/pages/GanttDemoPage.tsx

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+import React from 'react';
+import { AdvancedGanttDemo } from '../components/advanced-gantt';
+
+const GanttDemoPage: React.FC = () => {
+  return <AdvancedGanttDemo />;
+};
+
+export default GanttDemoPage;

worklenz-frontend/src/pages/projects/ProjectGanttView.tsx

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+import React, { useMemo } from 'react';
+import { useParams } from 'react-router-dom';
+import { AdvancedGanttChart } from '../../components/advanced-gantt';
+import { useAppSelector } from '../../hooks/useAppSelector';
+import { GanttTask } from '../../types/advanced-gantt.types';
+
+const ProjectGanttView: React.FC = () => {
+  const { projectId } = useParams<{ projectId: string }>();
+  
+  // Get tasks from your Redux store (adjust based on your actual state structure)
+  const tasks = useAppSelector(state => state.tasksReducer?.tasks || []);
+  
+  // Transform your tasks to GanttTask format
+  const ganttTasks = useMemo((): GanttTask[] => {
+    return tasks.map(task => ({
+      id: task.id,
+      name: task.name,
+      startDate: task.start_date ? new Date(task.start_date) : new Date(),
+      endDate: task.end_date ? new Date(task.end_date) : new Date(),
+      progress: task.progress || 0,
+      type: 'task',
+      status: task.status || 'not-started',
+      priority: task.priority || 'medium',
+      assignee: task.assignee ? {
+        id: task.assignee.id,
+        name: task.assignee.name,
+        avatar: task.assignee.avatar,
+      } : undefined,
+      parent: task.parent_task_id,
+      level: task.level || 0,
+      // Map other fields as needed
+    }));
+  }, [tasks]);
+
+  const handleTaskUpdate = (taskId: string, updates: Partial<GanttTask>) => {
+    // Implement your task update logic here
+    console.log('Update task:', taskId, updates);
+    // Dispatch Redux action to update task
+  };
+
+  const handleTaskMove = (taskId: string, newDates: { start: Date; end: Date }) => {
+    // Implement your task move logic here
+    console.log('Move task:', taskId, newDates);
+    // Dispatch Redux action to update task dates
+  };
+
+  return (
+    <div className="project-gantt-view h-full">
+      <AdvancedGanttChart
+        tasks={ganttTasks}
+        onTaskUpdate={handleTaskUpdate}
+        onTaskMove={handleTaskMove}
+        enableDragDrop={true}
+        enableResize={true}
+        enableProgressEdit={true}
+        enableInlineEdit={true}
+        className="h-full"
+      />
+    </div>
+  );
+};
+
+export default ProjectGanttView;