KP 改成宫头到宫头判宫，并写明口径（BUG-1319，上游 0337b77f）

本命 Bhava Chalit 表仍按中点，默认宫位不变。传了宫头却不声明就拒绝；没传宫头记整宫代理。报告多一行判宫口径。pytest tests/test_kp_cusp_house_assignment.py 3 通过，tests/test_bhava_chalit.py 仍通过。

Co-Authored-By: Grok (agent loop)

scripts/kp_system.py

@@ -371,6 +371,7 @@ def calc_kp_analysis(
     planet_positions: Dict,
     asc_sign: str = 'Aries',
     house_cusps: Optional[List[float]] = None,
+    house_occupancy_basis: Optional[str] = None,
 ) -> Dict:
     """
     完整KP分析（基于 diliprk/VedicAstro MIT 算法）。
@@ -379,6 +380,7 @@ def calc_kp_analysis(
         planet_positions: 行星位置 {planet: {'sign': str, 'degree': float, 'house': int}}
         asc_sign: 上升星座名称（无显式宫头时用于 whole-sign 代理）
         house_cusps: 可选的 12 个实际宫头黄经。提供时优先用于 KP 宫头与显著星。
+        house_occupancy_basis: 传了宫头就必须声明判宫口径；没传宫头时记 whole_sign_proxy。
 
     Returns:
         完整KP分析结果
@@ -405,8 +407,11 @@ def calc_kp_analysis(
         }
 
     explicit_cusps = house_cusps is not None
+    if explicit_cusps and not house_occupancy_basis:
+        raise ValueError('house_occupancy_basis is required when house_cusps are provided')
     if explicit_cusps and len(house_cusps) != 12:
         raise ValueError('house_cusps must contain exactly 12 longitudes')
+    occupancy_basis = house_occupancy_basis if explicit_cusps else 'whole_sign_proxy'
 
     # 2. 构建宫位信息（含 KP lords）。无实际宫头时保留历史 whole-sign 中点代理。
     houses = []
@@ -438,6 +443,7 @@ def calc_kp_analysis(
         'source': 'diliprk/VedicAstro MIT License',
         'maturity_profile': kp_maturity_profile(),
         'house_basis': 'explicit_cusps' if explicit_cusps else 'whole_sign_proxy',
+        'house_occupancy_basis': occupancy_basis,
         'planets': {pname: {'kp_lords': data['kp_lords'], 'significators': planet_sig.get(pname, {})}
                     for pname, data in kp_planets.items()},
         'houses': {h['house']: {'sign': h['sign'], 'cusp_longitude': h['cusp_longitude'], 'kp_lords': h['kp_lords'], 'significators': house_sig.get(h['house'], {})}
@@ -494,6 +500,7 @@ def build_kp_report_pack(
         f"- claim_status: `{maturity.get('claim_status')}`",
         f"- truth_matrix_allowed: `{maturity.get('truth_matrix_allowed')}`",
         f"- closed_oracle_parity_assets: `{', '.join(closed_parity_assets.keys())}`",
+        f"- House occupancy basis: `{kp_analysis.get('house_occupancy_basis') or 'whole_sign_proxy'}`",
         f"- planet_count: `{len(planets)}`",
         f"- house_count: `{len(houses)}`",
         f"- dba_period_count: `{len(periods)}`",