fix(courier): parse XFX multipart/form-data track callbacks

Xiaofeixia posts multipart form fields; previously mis-read as urlencoded empty payload. Parse multipart text parts and map into order status transitions.

Co-authored-by: Cursor <cursoragent@cursor.com>

server/dukang-api/src/integrations/courier/xiaofeixia/xiaofeixia.provider.ts

@@ -139,20 +139,15 @@ export class XiaofeixiaProvider implements ICourierProvider {
   parseTrackCallback(body: unknown): TrackCallbackPayload | null {
     if (!body || typeof body !== 'object') return null;
     const root = body as Record<string, unknown>;
-    // 兼容顶层字段或 data/payload 包裹
-    const nested =
-      root.data && typeof root.data === 'object'
-        ? (root.data as Record<string, unknown>)
-        : root.payload && typeof root.payload === 'object'
-          ? (root.payload as Record<string, unknown>)
-          : null;
-    const raw = nested ? { ...nested, ...root } : root;
-    const outNumber = String(raw.outNumber ?? '').trim();
-    const trackingNumber = String(raw.number ?? raw.trackingNumber ?? '').trim();
-    const status = String(raw.status ?? '').trim();
-    const statusName = String(raw.statusName ?? '').trim();
-    const trackInfo = String(raw.trackInfo ?? '').trim();
-    const createTime = String(raw.createTime ?? '').trim();
+    // 兼容顶层字段或 data/payload 包裹；data 若为 JSON 字符串也解开
+    const nestedObj = this.unwrapNestedObject(root.data) ?? this.unwrapNestedObject(root.payload);
+    const raw = nestedObj ? { ...nestedObj, ...root } : root;
+    const outNumber = this.firstString(raw, ['outNumber', 'out_number', 'outNo']);
+    const trackingNumber = this.firstString(raw, ['number', 'trackingNumber', 'trackingNo']);
+    const status = this.firstString(raw, ['status']);
+    const statusName = this.firstString(raw, ['statusName', 'status_name']);
+    const trackInfo = this.firstString(raw, ['trackInfo', 'track_info']);
+    const createTime = this.firstString(raw, ['createTime', 'create_time']);
     if (!outNumber && !trackingNumber) return null;
     if (!status && !trackInfo) return null;
     return {
@@ -165,6 +160,38 @@ export class XiaofeixiaProvider implements ICourierProvider {
     };
   }
 
+  private unwrapNestedObject(value: unknown): Record<string, unknown> | null {
+    if (value && typeof value === 'object' && !Array.isArray(value)) {
+      return value as Record<string, unknown>;
+    }
+    if (typeof value === 'string' && value.trim().startsWith('{')) {
+      try {
+        const parsed = JSON.parse(value) as unknown;
+        if (parsed && typeof parsed === 'object' && !Array.isArray(parsed)) {
+          return parsed as Record<string, unknown>;
+        }
+      } catch {
+        return null;
+      }
+    }
+    return null;
+  }
+
+  private firstString(raw: Record<string, unknown>, keys: string[]): string {
+    for (const key of keys) {
+      const value = raw[key];
+      if (value == null) continue;
+      if (Array.isArray(value)) {
+        const last = value[value.length - 1];
+        if (last != null && String(last).trim()) return String(last).trim();
+        continue;
+      }
+      const text = String(value).trim();
+      if (text) return text;
+    }
+    return '';
+  }
+
   mapTrackStatus(status: string, statusName?: string): CourierMappedOrderStatus | null {
     const name = (statusName || '').trim();
     if (status === '5' || /签收/.test(name)) {