Now let me set up the task plan for this massive construction management app:

Now let me read the sidebar component since we'll need it:

Now let me start building. First, I'll update the theme and layout, then create the core components:

Now let's add custom CSS tokens:

Now update the layout:

Now let me create the manifest.json and start building the app components:

Now let's build the data types and mock data:

Now let's build the sidebar navigation component:

Now let's build the Dashboard page:

Now let me build the Projects page:

Now let's build the Tasks page with List/Gantt/Kanban views:

Now build the Chat page:

Now the KPI & Reports page:

Now let's build the Proposals & Approvals page:

Now let's wire everything together in the main page:

Now let me add a no-scrollbar utility class:

Now let me also update the font references in globals.css:

Now let me mark all tasks as done:

App BMT DECOR da duoc xay dung hoan chinh theo kien truc trong file cua ban. He thong bao gom 6 trang chinh:

1. Tong Quan (Dashboard) - Thong ke tong hop du an, doanh thu, chi phi, loi nhuan, task tre han, va KPI nhan su.
2. Du An - Danh sach cong trinh voi filter theo trang thai, chi tiet tai chinh, tien do, va hang muc thi cong.
3. Cong Viec - 3 che do hien thi (Danh sach/Gantt/Kanban), loc theo du an, uu tien, va trang thai task.
4. Trao Doi - Chat noi bo theo kenh du an va phong ban, ho tro @mention, dinh kem file, va highlight tin nhan.
5. KPI & Bao Cao - Bieu do hieu suat nhan su (BarChart + PieChart), chi tiet KPI tung nguoi, bao cao tai chinh tong hop.
6. De Xuat & Phe Duyet - He thong de xuat mua sam/thanh toan/phat sinh voi luong phe duyet da cap, filter trang thai, va mau de xuat nhanh.

Giao dien mobile-first, sidebar dark theme, voi he thong mau xanh duong chuyen nghiep phu hop nganh xay dung. Tat ca vai tro (Admin, Ke Toan, Thiet Ke, Giam Sat, Thau Phu) deu duoc the hien trong du lieu mau.