feat(p2p): add Phase 4 merchant tier system and migrations

- Add merchant tier system (Lite/Super/Diamond) with tier badges
- Add advanced order filters (token, fiat, payment method, amount range)
- Add merchant dashboard with stats, ads management, tier upgrade
- Add fraud prevention system with risk scoring and trade limits
- Rename migrations to timestamp format for Supabase CLI compatibility
- Add new migrations: phase2_phase3_tables, fraud_prevention, merchant_system

web/src/App.tsx

@@ -39,6 +39,7 @@ const P2PPlatform = lazy(() => import('./pages/P2PPlatform'));
 const P2PTrade = lazy(() => import('./pages/P2PTrade'));
 const P2POrders = lazy(() => import('./pages/P2POrders'));
 const P2PDispute = lazy(() => import('./pages/P2PDispute'));
+const P2PMerchantDashboard = lazy(() => import('./pages/P2PMerchantDashboard'));
 const DEXDashboard = lazy(() => import('./components/dex/DEXDashboard').then(m => ({ default: m.DEXDashboard })));
 const Presale = lazy(() => import('./pages/Presale'));
 const PresaleList = lazy(() => import('./pages/launchpad/PresaleList'));
@@ -194,6 +195,11 @@ function App() {
                                   <P2PDispute />
                                 </ProtectedRoute>
                               } />
+                              <Route path="/p2p/merchant" element={
+                                <ProtectedRoute>
+                                  <P2PMerchantDashboard />
+                                </ProtectedRoute>
+                              } />
                               <Route path="/dex" element={
                                 <ProtectedRoute>
                                   <DEXDashboard />