fix: login error logging + E-Mail label (v0.1.2)

src/mcp_familywall/fw_client.py

@@ -101,10 +101,18 @@ class FamilyWallClient:
 
         if "ex" in body or "un" in body:
             error_data = body.get("ex", body.get("un"))
+            print(
+                f"[LOGIN ERROR] status={response.status_code} body={body}",
+                file=sys.stderr,
+            )
             msg = f"Login failed: {error_data}"
             raise FamilyWallError(msg, response_data=body)
 
         if "r" not in body:
+            print(
+                f"[LOGIN ERROR] status={response.status_code} body={body}",
+                file=sys.stderr,
+            )
             raise FamilyWallError("Login failed: unexpected response format", response_data=body)
 
         # Extract JSESSIONID from the Set-Cookie header