修复 OKX K 线无 since 时只拉 300 根的问题，并加入行情快捷键

- fetch_ohlcv_for_hub：无 since 时按目标根数分页拉取（OKX/Gate 单次约 300）

- hub_kline_store 全量补拉传 fetch_start_ms

- 行情区：数字键切换周期、Ctrl+空格全屏、Esc 退出全屏

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

tests/test_hub_ohlcv_lib.py

@@ -17,7 +17,9 @@ class _FakeExchange:
         if not self.pages:
             return []
         page = self.pages.pop(0)
-        return [b for b in page if b[0] >= since] if since else page
+        if since is None:
+            return page
+        return [b for b in page if b[0] >= since]
 
 
 class TestHubOhlcvLib(unittest.TestCase):
@@ -63,6 +65,36 @@ class TestHubOhlcvLib(unittest.TestCase):
         tick = price_tick_from_market(_Ex(), "INJ/USDT:USDT")
         self.assertAlmostEqual(tick, 0.001)
 
+    def test_full_fetch_without_since_paginates_okx_style(self):
+        """OKX 等无 since 单次约 300 根，须分页至 limit。"""
+        from hub_ohlcv_lib import TIMEFRAME_MS
+
+        step = TIMEFRAME_MS["1h"]
+        want = 1000
+        base = max(0, int(__import__("time").time() * 1000) - want * step)
+        pages = [
+            [[base + i * step, 1.0, 1.1, 0.9, 1.05, 100.0] for i in range(300)],
+            [[base + (300 + i) * step, 2.0, 2.1, 1.9, 2.05, 200.0] for i in range(300)],
+            [[base + (600 + i) * step, 3.0, 3.1, 2.9, 3.05, 300.0] for i in range(300)],
+            [[base + (900 + i) * step, 4.0, 4.1, 3.9, 4.05, 400.0] for i in range(100)],
+        ]
+        ex = _FakeExchange(pages)
+
+        out = fetch_ohlcv_for_hub(
+            symbol="ONDO/USDT",
+            timeframe="1h",
+            since_ms=None,
+            limit=want,
+            normalize_symbol_input=lambda s: str(s).strip().upper(),
+            normalize_exchange_symbol=lambda s: f"{s}:USDT" if ":" not in s else s,
+            ensure_markets_loaded=lambda: None,
+            exchange=ex,
+        )
+        self.assertTrue(out.get("ok"))
+        self.assertEqual(len(out.get("bars") or []), 1000)
+        self.assertGreaterEqual(len(ex.calls), 4)
+        self.assertAlmostEqual(out["bars"][-1]["close"], 4.05)
+
     def test_pagination_continues_when_page_smaller_than_chunk(self):
         """Gate 等常返回 299 根/次，不应误判为已到末尾。"""
         base = 1_700_000_000_000