feat(roadtrip): share trip preferences and improve service stops

client/src/sync/mutationQueue.ts

@@ -13,7 +13,7 @@ import { getOfflinePrefs } from './offlinePrefs'
 import { randomId } from '../utils/randomId'
 import type { QueuedMutation } from '../db/offlineDb'
 import type { Table } from 'dexie'
-import { assignmentSchema } from '@trek/shared'
+import { roadtripPreferencesResponseSchema, assignmentSchema } from '@trek/shared'
 import { cacheAssignment } from '../db/cacheAssignment'
 
 // Map Dexie table names used in `resource` field → actual Dexie tables.
@@ -195,6 +195,10 @@ export const mutationQueue = {
             headers,
           })
 
+          if (mutation.resource === 'roadtripPreferences') {
+            const saved = roadtripPreferencesResponseSchema.parse(response.data)
+            await offlineDb.roadtripPreferences.put(saved)
+          }
           // Apply canonical server response to Dexie
           if (mutation.resource === 'assignments') {
             await cacheAssignment(assignmentSchema.parse(response.data.assignment))