feat: comprehensive mobile optimization, role-based AI chatbot, and multi-role dashboard enhancements

- Rewrote AI chatbot context system with deep role-aware data injection for all 7 roles (Owner, Admin, Field Agent, Contractor, Subcontractor, Vendor, Customer) plus guest fallback
- Added mobile-responsive bottom-sheet modals across all roles (ChangeOrderDrawer, InvoiceDetailModal, FinancialSummaryModal, VendorFinancialSummaryModal, FinancialDetailsModal)
- Converted Owner Project List and Vendor Orders tables to mobile card views with touch-friendly layouts
- Optimized Vendor Management and People Directory with mobile list/detail toggle and back navigation
- Fixed Document Control mobile view: horizontally scrollable filter tabs, proper overflow chain for document visibility
- Added responsive padding, text scaling, and flex-wrap across StatCard, TaskDetailsModal, OwnerSnapshot, OwnerProjectDetail, VendorDashboard, and DocumentManagement
- Expanded mock data store with richer vendor invoices, orders, documents, and compliance records
- Enhanced Owner Snapshot with financial KPI cards, urgent items panel, and Action Center modal
- Built Contractor Dashboard with task management, financial summary, and performance metrics
- Built Subcontractor Dashboard with clock-in tracking, task assignments, and invoice management
- Enhanced Vendor Dashboard with earnings summary, active orders, compliance status, and performance rating
- Added icon-only tab navigation on mobile for OwnerProjectDetail
- Extended attribution signatures across all platform pages

src/pages/Login.jsx

@@ -278,6 +278,7 @@ const Login = () => {
                     </div>
                 </SpotlightCard>
             </div>
+            <span className="attribution-ghost">igotsar.matyas | LynkedUpPro - Turns out roofing CRMs don't build themselves. Who knew?</span>
         </div>
     );
 };