Hide SIM label in WeCom; count completed rounds from closed groups.

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

backend/tests/test_rest_after_close.py

@@ -10,13 +10,20 @@ def test_enter_rest_after_close_sets_resting(tmp_path) -> None:
     db = Database(tmp_path / "rest.db")
     set_db(db)
     db.set_setting("rest_seconds", "120")
+    now = int(time.time() * 1000)
+    db.execute(
+        """INSERT INTO groups(
+            group_id, status, open_at_ms, close_at_ms, realized_pnl
+        ) VALUES (?,?,?,?,?)""",
+        ("G-20260729-01", "closed", now - 1000, now, 1.0),
+    )
     eng = StrategyEngine()
     before = int(time.time() * 1000)
     eng.enter_rest_after_close()
     row = db.fetchone("SELECT * FROM strategy_state WHERE id=1")
     assert row is not None
     assert row["phase"] == "resting"
-    assert int(row["rounds_done"] or 0) >= 1
+    assert int(row["rounds_done"] or 0) == 1
     until = int(row["rest_until_ms"] or 0)
     assert until >= before + 100_000
     db.close()