fix: resolve all CI mypy (265→0) and ruff (26→0) errors

- pyproject.toml: add mypy overrides for pandas/tabulate/matplotlib stubs,
  disable strict checking for vendored MyTT library
- config.py: use cast() for dict[str, Any] .get() returns
- beichi.py: widen _calc_bi_force param to BI | XD, import XD
- backtest/cli.py: split combo/single strategy into separate typed variables
- backtest/combo.py: add bool_array() helper for numpy return types
- chanlun/analyser.py: type ignore for pandas row access, fix dict type arg
- unified.py: change fields param from object to Any
- ex/mac_client.py: add type args to list literals
- cli/cmd_offline.py: wrap int market as Market enum before API call
- cli/cmd_chanlun.py: fix dict type arg
- offline/write_*.py: explicit int() cast for struct.unpack returns
- MyTT.py: fix line-too-long comments, UP038 isinstance syntax
- tests: fix E712 (==False → ~mask), E741 (noqa), F841, import sorting
- ruff format applied across codebase

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

tests/unit/test_protocol_fixes.py

@@ -19,8 +19,20 @@ def test_security_bars_exact_layout():
     # Payload: 0x052D, 1 (Market.SH), "600000", 4 (KlineCategory.DAY), 1, 0 (start), 10, 0, 0, 0
     expected = struct.pack(
         "<HIHHHH6sHHHHIIH",
-        0x010C, 0x01016408, 0x001C, 0x001C,
-        0x052D, 1, b"600000", 4, 1, 0, 10, 0, 0, 0
+        0x010C,
+        0x01016408,
+        0x001C,
+        0x001C,
+        0x052D,
+        1,
+        b"600000",
+        4,
+        1,
+        0,
+        10,
+        0,
+        0,
+        0,
     )
     assert req == expected
     assert len(req) == 38
@@ -34,8 +46,20 @@ def test_history_fund_flow_exact_layout():
     # Payload: 0x052D, 1 (Market.SH), "600000", 22, 1, 0, 10, 0, 0, 0
     expected = struct.pack(
         "<HIHHHH6sHHHHIIH",
-        0x010C, 0x01016408, 0x001C, 0x001C,
-        0x052D, 1, b"600000", 22, 1, 0, 10, 0, 0, 0
+        0x010C,
+        0x01016408,
+        0x001C,
+        0x001C,
+        0x052D,
+        1,
+        b"600000",
+        22,
+        1,
+        0,
+        10,
+        0,
+        0,
+        0,
     )
     assert req == expected
     assert len(req) == 38
@@ -56,16 +80,16 @@ def test_security_quotes_limit_mapping():
     from easy_tdx.codec.price import put_price
 
     cmd = GetSecurityQuotesCmd([(Market.SH, "600000")])
-    
+
     # 构造响应报文
     body = bytearray(b"\x00\x00")
     body.extend(struct.pack("<H", 1))
-    
+
     # Record: Market(B), Code(6s), Active1(H) + ...
     body.extend(struct.pack("<B6sH", 1, b"600000", 0))
-    
+
     body.extend(put_price(1010))  # price_raw
-    body.extend(put_price(-5))    # last_close_diff
+    body.extend(put_price(-5))  # last_close_diff
     body.extend(put_price(0))
     body.extend(put_price(0))
     body.extend(put_price(0))
@@ -86,7 +110,7 @@ def test_security_quotes_limit_mapping():
     body.extend(put_price(0))
     body.extend(put_price(0))
     body.extend(struct.pack("<hH", 0, 0))
-    
+
     quotes = cmd.parse_response(bytes(body))
     q = quotes[0]
     assert q.limit_up is None
@@ -120,18 +144,19 @@ def test_compute_price_limits_for_indices():
 
 def test_compute_price_limits_for_newly_listed_stocks():
     """上市初期限价窗口应返回 None。"""
-    assert compute_price_limits(
-        Market.SH, "600001", "主板新股", 10.0, listed_days=5
-    ) == (None, None)
-    assert compute_price_limits(
-        Market.SH, "600001", "主板新股", 10.0, listed_days=6
-    ) == (11.0, 9.0)
-    assert compute_price_limits(
-        Market.BJ, "920002", "北交所新股", 84.36, listed_days=1
-    ) == (None, None)
-    assert compute_price_limits(
-        Market.BJ, "920002", "北交所新股", 84.36, listed_days=2
-    ) == (109.67, 59.05)
+    assert compute_price_limits(Market.SH, "600001", "主板新股", 10.0, listed_days=5) == (
+        None,
+        None,
+    )
+    assert compute_price_limits(Market.SH, "600001", "主板新股", 10.0, listed_days=6) == (11.0, 9.0)
+    assert compute_price_limits(Market.BJ, "920002", "北交所新股", 84.36, listed_days=1) == (
+        None,
+        None,
+    )
+    assert compute_price_limits(Market.BJ, "920002", "北交所新股", 84.36, listed_days=2) == (
+        109.67,
+        59.05,
+    )
 
 
 def test_history_fund_flow_uses_uint32_volume_words():