refactor(navigation): consolidate navigation with href helpers and extract push device hook

- Migrate all navigation calls from magic strings to centralized href helpers
- Extract inline device registration logic into useRegisterPushDevice hook
- Remove unused terms and privacy policy routes from profile stack
- Add hrefTradeDetail helper for trade detail navigation
- Restore routePayloadCache.stashSystemMessage for group request/invite handling
- Change desktop shell tab navigation from replace to push

app/_layout.tsx

@@ -30,6 +30,7 @@ import { CallScreen, IncomingCallModal, FloatingCallWindow } from '../src/compon
 import { jpushService } from '@/services/notification/jpushService';
 import { callKeepService } from '@/services/callkeep';
 import { callStore } from '@/stores/call';
+import * as hrefs from '../src/navigation/hrefs';
 
 registerNotificationPresentationHandler();
 
@@ -172,22 +173,21 @@ function NotificationBootstrap() {
 
           if (conversationId) {
             const isGroup = conversationType === 'group';
-            const q = new URLSearchParams();
-            if (isGroup) {
-              q.set('isGroupChat', '1');
-              if (groupId) q.set('groupId', groupId);
-              if (groupName) q.set('groupName', groupName);
-              if (groupAvatar) q.set('groupAvatar', groupAvatar);
-            } else if (senderId) {
-              q.set('userId', senderId);
-            }
-            const qs = q.toString();
-            router.push(`/chat/${encodeURIComponent(conversationId)}${qs ? `?${qs}` : ''}`);
+            router.push(
+              hrefs.hrefChat({
+                conversationId,
+                userId: isGroup ? undefined : senderId,
+                isGroupChat: isGroup,
+                groupId: isGroup ? groupId : undefined,
+                groupName: isGroup ? groupName : undefined,
+                groupAvatar: isGroup ? groupAvatar : undefined,
+              })
+            );
           } else {
-            router.push('/messages/notifications');
+            router.push(hrefs.hrefNotifications());
           }
         } else {
-          router.push('/messages/notifications');
+          router.push(hrefs.hrefNotifications());
         }
       });
 
@@ -287,30 +287,6 @@ function ThemedStack() {
           <Stack.Screen name="index" options={{ headerShown: false }} />
           <Stack.Screen name="(auth)" options={{ headerShown: false }} />
           <Stack.Screen name="(app)" options={{ headerShown: false }} />
-          <Stack.Screen
-            name="terms"
-            options={{
-              headerShown: false,
-            }}
-          />
-          <Stack.Screen
-            name="privacy"
-            options={{
-              headerShown: false,
-            }}
-          />
-          <Stack.Screen
-            name="post/[postId]"
-            options={{
-              headerShown: false,
-            }}
-          />
-          <Stack.Screen
-            name="user/[userId]"
-            options={{
-              headerShown: false,
-            }}
-          />
         </Stack>
       </SessionGate>
     </>