fix(parcel-sync): populate county data during login, not via PATCH

Root cause: PATCH endpoint created a new EterraClient which tried
to re-login with expired session → 401. Now county refresh runs
immediately after successful login in the session route, using the
same authenticated client (fire-and-forget). Component reloads UAT
data 5s after connection to pick up fresh county info.

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

src/modules/parcel-sync/components/parcel-sync-module.tsx

@@ -554,51 +554,28 @@ export function ParcelSyncModule() {
   }, [fetchDbSummary]);
 
   /* ════════════════════════════════════════════════════════════ */
-  /*  Auto-refresh county data when eTerra is connected            */
+  /*  Reload UAT data when session connects (county data may     */
+  /*  have been populated by the login flow)                      */
   /* ════════════════════════════════════════════════════════════ */
 
-  const countyRefreshAttempted = useRef(false);
+  const prevConnected = useRef(false);
 
   useEffect(() => {
-    if (!session.connected || countyRefreshAttempted.current) return;
-    if (uatData.length === 0) return;
-
-    // Check if most UATs are missing county data
-    const withCounty = uatData.filter((u) => u.county).length;
-    if (withCounty > uatData.length * 0.5) return; // >50% already have county
-
-    countyRefreshAttempted.current = true;
-    console.log("[uats] Auto-refreshing county data from eTerra…");
-
-    fetch("/api/eterra/uats", { method: "PATCH" })
-      .then((res) => res.json())
-      .then(
-        (result: {
-          updated?: number;
-          error?: string;
-          phase1?: number;
-          phase2?: number;
-          codeMatches?: number;
-          nameMatches?: number;
-          unmatched?: number;
-          debug?: unknown;
-        }) => {
-          console.log("[uats] County refresh result:", result);
-          if (result.updated && result.updated > 0) {
-            // Reload UAT data with fresh county info
-            fetch("/api/eterra/uats")
-              .then((res) => res.json())
-              .then((data: { uats?: UatEntry[] }) => {
-                if (data.uats && data.uats.length > 0) setUatData(data.uats);
-              })
-              .catch(() => {});
-          }
-        },
-      )
-      .catch((err) => {
-        console.error("[uats] County refresh failed:", err);
-      });
-  }, [session.connected, uatData]);
+    if (session.connected && !prevConnected.current) {
+      // Just connected — reload UATs after a short delay to let
+      // the server-side county refresh finish
+      const timer = setTimeout(() => {
+        fetch("/api/eterra/uats")
+          .then((res) => res.json())
+          .then((data: { uats?: UatEntry[] }) => {
+            if (data.uats && data.uats.length > 0) setUatData(data.uats);
+          })
+          .catch(() => {});
+      }, 5000);
+      return () => clearTimeout(timer);
+    }
+    prevConnected.current = session.connected;
+  }, [session.connected]);
 
   /* ════════════════════════════════════════════════════════════ */
   /*  UAT autocomplete filter                                     */