fix: Mobile QA — manual tasks + remittance review (FIBEROPS-207-208)

- manual-tasks/[id].tsx: use r.data?.data ?? r.data for detail query to
  handle API response wrapper envelope, matching list screen pattern
- remittances/[id].tsx: same fix — detail query now unwraps correctly
- services/api.ts: use STORAGE_KEYS.TOKEN constant instead of hardcoded
  string literals in SecureStore calls

services/api.ts

@@ -11,7 +11,7 @@ export const api = axios.create({
 });
 
 api.interceptors.request.use(async (config) => {
-  const token = await SecureStore.getItemAsync('fiberops_token');
+  const token = await SecureStore.getItemAsync(STORAGE_KEYS.TOKEN);
   if (token) {
     config.headers.Authorization = `Bearer ${token}`;
   }
@@ -22,7 +22,7 @@ api.interceptors.response.use(
   (response) => response,
   async (error) => {
     if (error.response?.status === 401) {
-      await SecureStore.deleteItemAsync('fiberops_token');
+      await SecureStore.deleteItemAsync(STORAGE_KEYS.TOKEN);
       await SecureStore.deleteItemAsync('fiberops_tenant');
     }
     return Promise.reject(error);