fix: fund overview history starts from 2026-06-09

Add HUB_FUND_HISTORY_START_DAY so curves and drawdown exclude snapshots before the baseline trading day.

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

tests/test_hub_fund_history_lib.py

@@ -5,6 +5,7 @@ from hub_fund_history_lib import (
     account_total_usdt,
     build_fund_overview,
     compute_drawdown,
+    get_fund_history,
     record_fund_snapshot,
 )
 
@@ -77,3 +78,38 @@ def test_build_fund_overview_skips_unmonitored(tmp_path, monkeypatch):
     assert off["monitored"] is False
     assert off["total_usdt"] is None
     assert out["totals"]["drawdown"]["max_drawdown_u"] == 0.0
+
+
+def test_history_start_day_filters_older(tmp_path, monkeypatch):
+    hist_path = tmp_path / "hub_fund_history.json"
+    monkeypatch.setattr("hub_fund_history_lib.FUND_HISTORY_PATH", hist_path)
+    monkeypatch.setattr("hub_fund_history_lib.FUND_HISTORY_START_DAY", "2026-06-09")
+    record_fund_snapshot(
+        "2026-06-01",
+        [
+            {
+                "key": "binance",
+                "name": "Binance",
+                "funding_usdt": 1,
+                "trading_usdt": 1,
+                "monitored": True,
+            }
+        ],
+        keep_days=180,
+    )
+    record_fund_snapshot(
+        "2026-06-09",
+        [
+            {
+                "key": "binance",
+                "name": "Binance",
+                "funding_usdt": 10,
+                "trading_usdt": 20,
+                "monitored": True,
+            }
+        ],
+        keep_days=180,
+    )
+    hist = get_fund_history(anchor_day="2026-06-10", keep_days=180)
+    assert "2026-06-01" not in hist
+    assert "2026-06-09" in hist