feat: add force refresh button to source/collection cards

- Backend: preview handlers accept forceRefresh in request body
- Frontend: Sources & Collections cards get a refresh button that
  bypasses cache and re-fetches from remote

frontend/src/api/index.js

@@ -71,8 +71,10 @@ export const deleteRecycleEntry = (id) => api.delete(`/recycle-bin/${id}`)
 export const restoreRecycleEntry = (id) => api.post(`/recycle-bin/${id}/restore`)
 
 // Preview
-export const previewSource = (data) => api.post('/preview/source', data)
-export const previewCollection = (data) => api.post('/preview/collection', data)
+export const previewSource = (data, forceRefresh = false) =>
+  api.post('/preview/source', forceRefresh ? { ...data, forceRefresh: true } : data)
+export const previewCollection = (data, forceRefresh = false) =>
+  api.post('/preview/collection', forceRefresh ? { ...data, forceRefresh: true } : data)
 
 // Download links
 export const getLinkSource = (name, target) => api.get(`/link/source/${name}`, { params: target ? { target } : {} })

frontend/src/pages/Collections.vue

@@ -26,6 +26,10 @@
             </div>
           </div>
           <div class="flex gap-1 ml-3">
+            <button class="px-2.5 py-1 text-xs rounded hover:bg-blue-50 text-blue-600 whitespace-nowrap"
+              :disabled="!!egressLoadingId || refreshingId === col.id" @click.stop="refreshCollection(col)">
+              {{ refreshingId === col.id ? '刷新中...' : '刷新' }}
+            </button>
             <button class="px-2.5 py-1 text-xs rounded hover:bg-blue-50 text-blue-600 whitespace-nowrap"
               :disabled="!!egressLoadingId" @click.stop="probeCollectionEgress(col)">
               {{ egressLoadingId === col.id ? `探测 ${egressProgress}` : '探测出口' }}
@@ -168,6 +172,7 @@ const expandedLoading = ref(false)
 const expandedData = ref(null)
 const egressLoadingId = ref('')
 const egressProgress = ref('')
+const refreshingId = ref('')
 const toast = ref(null)
 const nodeCounts = reactive({})
 const confirmDialog = ref({ show: false, title: '', message: '', danger: false, action: null })
@@ -325,6 +330,23 @@ async function copyNodeLink(node) {
   }
 }
 
+async function refreshCollection(col) {
+  if (refreshingId.value) return
+  refreshingId.value = col.id
+  try {
+    const res = await previewCollection(col, true)
+    nodeCounts[col.id] = countsFromPreview(res.data)
+    if (expandedCollectionId.value === col.id) {
+      expandedData.value = res.data
+    }
+    showToast('已刷新')
+  } catch (e) {
+    showToast(e.message, 'error')
+  } finally {
+    refreshingId.value = ''
+  }
+}
+
 async function probeCollectionEgress(col) {
   if (egressLoadingId.value) return
   egressLoadingId.value = col.id

frontend/src/pages/Sources.vue

@@ -30,6 +30,10 @@
             <p v-if="flowSummary(src)" class="text-xs text-gray-500 mt-1 truncate">{{ flowSummary(src) }}</p>
           </div>
           <div class="flex gap-1 ml-3">
+            <button class="px-2.5 py-1 text-xs rounded hover:bg-blue-50 text-blue-600 whitespace-nowrap"
+              :disabled="!!egressLoadingId || refreshingId === src.id" @click.stop="refreshSource(src)">
+              {{ refreshingId === src.id ? '刷新中...' : '刷新' }}
+            </button>
             <button class="px-2.5 py-1 text-xs rounded hover:bg-blue-50 text-blue-600 whitespace-nowrap"
               :disabled="!!egressLoadingId" @click.stop="probeSourceEgress(src)">
               {{ egressLoadingId === src.id ? `探测 ${egressProgress}` : '探测出口' }}
@@ -203,6 +207,7 @@ const expandedLoading = ref(false)
 const expandedData = ref(null)
 const egressLoadingId = ref('')
 const egressProgress = ref('')
+const refreshingId = ref('')
 const nodeCounts = reactive({})
 const flowInfos = reactive({})
 const toast = ref(null)
@@ -428,6 +433,23 @@ async function copyNodeLink(node) {
   }
 }
 
+async function refreshSource(src) {
+  if (refreshingId.value) return
+  refreshingId.value = src.id
+  try {
+    const res = await previewSource(sourcePreviewPayload(src), true)
+    nodeCounts[src.id] = countsFromPreview(res.data)
+    if (expandedSourceId.value === src.id) {
+      expandedData.value = res.data
+    }
+    showToast('已刷新')
+  } catch (e) {
+    showToast(e.message, 'error')
+  } finally {
+    refreshingId.value = ''
+  }
+}
+
 async function probeSourceEgress(src) {
   if (egressLoadingId.value) return
   egressLoadingId.value = src.id