feat(credit): 增强信用订单页面的文件上传和预览功能

- 添加 guessFileType 工具函数用于推断文件类型
- 扩展 addUploadedRecords 函数支持更多文件字段包括 downloadUrl 和 path
- 优化文件上传逻辑支持从临时文件路径批量上传
- 集成文件类型检测功能到文档预览中提高兼容性
- 调整城市选择组件限制最多选择2个城市并优化显示逻辑

src/credit/order/add.tsx

@@ -24,6 +24,17 @@ const isHttpUrl = (url?: string) => {
   return /^https?:\/\//i.test(url)
 }
 
+const guessFileType = (nameOrUrl?: string) => {
+  const s = String(nameOrUrl || '').trim()
+  if (!s) return undefined
+  const clean = s.split('?')[0].split('#')[0]
+  const dot = clean.lastIndexOf('.')
+  if (dot < 0) return undefined
+  const ext = clean.slice(dot + 1).toLowerCase()
+  if (!/^[a-z0-9]+$/.test(ext)) return undefined
+  return ext
+}
+
 export default function CreditOrderAddPage() {
   const formRef = useRef<any>(null)
 
@@ -44,19 +55,18 @@ export default function CreditOrderAddPage() {
       text: a.label,
       children: (a.children || []).map(b => ({
         value: b.label,
-        text: b.label,
-        children: (b.children || []).map(c => ({
-          value: c.label,
-          text: c.label
-        }))
+        text: b.label
       }))
     }))
   }, [])
 
-  const addUploadedRecords = (incoming: Array<{ url?: string; thumbnail?: string; name?: string }>, opts: { isImage: boolean }) => {
+  const addUploadedRecords = (
+    incoming: Array<{ url?: string; thumbnail?: string; downloadUrl?: string; path?: string; name?: string }>,
+    opts: { isImage: boolean }
+  ) => {
     const next = incoming
       .map((r, idx) => {
-        const url = String(r.url || r.thumbnail || '').trim()
+        const url = String(r.url || r.downloadUrl || r.thumbnail || r.path || '').trim()
         if (!url) return null
         const name = String(r.name || (opts.isImage ? `图片${idx + 1}` : `文件${idx + 1}`)).trim()
         const id = `${Date.now()}-${Math.random().toString(16).slice(2)}`
@@ -124,15 +134,17 @@ export default function CreditOrderAddPage() {
 
     // @ts-ignore
     const tempFiles = (res?.tempFiles || []) as Array<{ path?: string; name?: string }>
-    const paths = tempFiles.map(f => f?.path).filter(Boolean) as string[]
-    if (!paths.length) return
+    const picked = tempFiles
+      .map(f => ({ path: f?.path, name: f?.name }))
+      .filter(f => Boolean(f.path)) as Array<{ path: string; name?: string }>
+    if (!picked.length) return
 
     setUploading(true)
     try {
       const uploaded = []
-      for (let i = 0; i < paths.length; i++) {
-        const record = await uploadFileByPath(paths[i])
-        const name = tempFiles[i]?.name
+      for (const f of picked) {
+        const record = await uploadFileByPath(f.path)
+        const name = f?.name
         uploaded.push({ ...(record as any), name: name || (record as any)?.name })
       }
       addUploadedRecords(uploaded, { isImage: false })
@@ -179,7 +191,10 @@ export default function CreditOrderAddPage() {
         filePath = dl?.tempFilePath
       }
 
-      await Taro.openDocument({ filePath, showMenu: true })
+      const fileType = guessFileType(a.name || a.url)
+      const openOpts: any = { filePath, showMenu: true }
+      if (fileType) openOpts.fileType = fileType
+      await Taro.openDocument(openOpts)
     } catch (e) {
       console.error('预览文件失败:', e)
       Taro.showToast({ title: '无法打开该文件', icon: 'none' })
@@ -363,9 +378,9 @@ export default function CreditOrderAddPage() {
         options={cityOptions as any}
         title="选择城市"
         onChange={(value: any[]) => {
-          const list = (value || []).filter(Boolean).slice(0, 3).map(v => String(v))
+          const list = (value || []).filter(Boolean).slice(0, 2).map(v => String(v))
           setCityValue(list)
-          const txt = list.slice(0, 2).join(' ')
+          const txt = list.join(' ')
           setCityText(txt || '')
           setCityVisible(false)
         }}