feat(web): update views and services

Views:
- AppShellRouteView.vue: update route view
- SettingsView.vue: update settings view
- TravelReimbursementCreateView.vue: update travel form view
- scripts/SettingsView.js: update settings view logic
- scripts/TravelReimbursementCreateView.js: update travel form logic

Services:
- services/orchestrator.js: update orchestrator service client

web/src/services/orchestrator.js

@@ -6,3 +6,21 @@ export function runOrchestrator(payload) {
     body: JSON.stringify(payload)
   })
 }
+
+export function fetchLatestConversation(userId) {
+  const params = new URLSearchParams({
+    user_id: String(userId || '').trim()
+  })
+
+  return apiRequest(`/orchestrator/conversations/latest?${params.toString()}`)
+}
+
+export function clearUserConversations(userId) {
+  const params = new URLSearchParams({
+    user_id: String(userId || '').trim()
+  })
+
+  return apiRequest(`/orchestrator/conversations?${params.toString()}`, {
+    method: 'DELETE'
+  })
+}