fix: Register staff notifications route and fix import paths

## 🐛 Bug Fixes

**App.tsx:**
- ✅ Added StaffNotifications import
- ✅ Registered `/settings/notifications/staff` route

**Staff/Channels.tsx:**
- ✅ Fixed SettingsCard import path (../../components/SettingsCard)
- ✅ Fixed ChannelConfig import path (../ChannelConfig)

**Staff.tsx:**
- ✅ Removed recipientType prop from Templates (not supported yet)

---

**Status:** Staff notifications route should now work correctly

admin-spa/src/App.tsx

@@ -201,6 +201,7 @@ import SettingsTax from '@/routes/Settings/Tax';
 import SettingsCustomers from '@/routes/Settings/Customers';
 import SettingsLocalPickup from '@/routes/Settings/LocalPickup';
 import SettingsNotifications from '@/routes/Settings/Notifications';
+import StaffNotifications from '@/routes/Settings/Notifications/Staff';
 import SettingsDeveloper from '@/routes/Settings/Developer';
 import MorePage from '@/routes/More';
 
@@ -488,6 +489,7 @@ function AppRoutes() {
       <Route path="/settings/local-pickup" element={<SettingsLocalPickup />} />
       <Route path="/settings/checkout" element={<SettingsIndex />} />
       <Route path="/settings/notifications" element={<SettingsNotifications />} />
+      <Route path="/settings/notifications/staff" element={<StaffNotifications />} />
       <Route path="/settings/brand" element={<SettingsIndex />} />
       <Route path="/settings/developer" element={<SettingsDeveloper />} />