fix(ancpi): add SearchEstate debug logging, try without uatId, add cart first

SearchEstate might need active cart and/or different headers.
Add X-Requested-With: XMLHttpRequest, make uatId optional, log raw
response (type, length, sample), and add-to-cart before searching.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/modules/parcel-sync/services/epay-client.ts

@@ -329,33 +329,52 @@ export class EpayClient {
   async searchEstate(
     identifier: string,
     countyIdx: number,
-    uatId: number,
+    uatId?: number,
   ): Promise<EpaySearchResult[]> {
     return this.retryOnAuthFail(async () => {
       const body = new URLSearchParams();
       body.set("identifier", identifier);
       body.set("countyId", String(countyIdx));
-      body.set("uatId", String(uatId));
+      if (uatId != null && uatId >= 0) {
+        body.set("uatId", String(uatId));
+      }
 
       const response = await this.client.post(
         `${BASE_URL}/SearchEstate.action`,
         body.toString(),
         {
-          headers: { "Content-Type": "application/x-www-form-urlencoded" },
+          headers: {
+            "Content-Type": "application/x-www-form-urlencoded",
+            Accept: "application/json, text/plain, */*",
+            "X-Requested-With": "XMLHttpRequest",
+          },
           timeout: DEFAULT_TIMEOUT_MS,
         },
       );
 
       const data = response.data;
+
+      // Log raw response for debugging
+      const rawStr = typeof data === "string" ? data : JSON.stringify(data);
+      console.log(
+        `[epay] SearchEstate(${identifier}, county=${countyIdx}, uat=${uatId ?? "none"}):`,
+        `type=${typeof data}, len=${rawStr?.length ?? 0}, sample=${rawStr?.slice(0, 300)}`,
+      );
+
       if (Array.isArray(data)) return data as EpaySearchResult[];
 
-      // Sometimes wrapped in a string
       if (typeof data === "string") {
-        try {
-          const parsed = JSON.parse(data);
-          if (Array.isArray(parsed)) return parsed as EpaySearchResult[];
-        } catch {
-          // Not JSON
+        // Try JSON parse
+        const trimmed = data.trim();
+        if (trimmed.startsWith("[") || trimmed.startsWith("{")) {
+          try {
+            const parsed = JSON.parse(trimmed);
+            if (Array.isArray(parsed)) return parsed as EpaySearchResult[];
+            // Wrapped in object?
+            if (parsed?.results) return parsed.results as EpaySearchResult[];
+          } catch {
+            // Not JSON
+          }
         }
       }