feat: options sheet sizing, ITM/OTM labels, and 14-day chain view

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

tests/test_options_pricing.py

@@ -45,6 +45,28 @@ def test_calc_order_size_budget():
     assert r["total_premium"] <= 10
 
 
+def test_calc_order_size_sheets():
+    r = calc_order_size(
+        quote_per_unit=15.6,
+        ct_mult=0.01,
+        min_sz=1,
+        sheets=3,
+        budget_cap=10,
+    )
+    assert r["ok"] is True
+    assert r["sheets"] == 3
+    assert abs(r["total_premium"] - 0.468) < 1e-9
+
+
+def test_option_moneyness():
+    from lib.options.options_pricing_lib import option_moneyness, option_moneyness_label
+
+    assert option_moneyness(opt_type="C", strike=1700, index_px=1800) == "itm"
+    assert option_moneyness(opt_type="C", strike=1900, index_px=1800) == "otm"
+    assert option_moneyness_label("itm") == "实值"
+    assert option_moneyness_label("otm") == "虚值"
+
+
 def test_calc_order_size_too_small():
     r = calc_order_size(
         quote_per_unit=2000.0,