diff --git a/frontend/src/modules/moldinsight/ResultView.vue b/frontend/src/modules/moldinsight/ResultView.vue
index fab638c..ec61667 100644
--- a/frontend/src/modules/moldinsight/ResultView.vue
+++ b/frontend/src/modules/moldinsight/ResultView.vue
@@ -212,6 +212,27 @@
         </div>
 
         <div v-if="sideActionAiAdvice" class="result-grid">
+          <div class="result-card">
+            <h4>规则检测摘要</h4>
+            <div class="info-list">
+              <div class="info-item">
+                <span class="info-label">检测状态</span>
+                <span class="info-value">{{ ruleActionSummary.total_mechanism_count > 0 ? '检测到倒扣' : '未检测到倒扣' }}</span>
+              </div>
+              <div class="info-item">
+                <span class="info-label">滑块数量</span>
+                <span class="info-value">{{ ruleActionSummary.total_slider_count || 0 }}</span>
+              </div>
+              <div class="info-item">
+                <span class="info-label">斜顶数量</span>
+                <span class="info-value">{{ ruleActionSummary.total_lifter_count || 0 }}</span>
+              </div>
+              <div class="info-item">
+                <span class="info-label">复杂度</span>
+                <span class="info-value">{{ ruleActionSummary.complexity || '未知' }}</span>
+              </div>
+            </div>
+          </div>
           <div class="result-card result-card-highlight">
             <h4>AI 结论</h4>
             <div class="info-list">
@@ -815,6 +836,16 @@ const sideActionAiAdvice = computed(() => {
   ) || fallbackSideActionAiAdvice.value
 })
 
+const ruleActionSummary = computed(() => {
+  const summary = selectedScheme.value?.side_actions?.summary || {}
+  return {
+    total_slider_count: summary.total_slider_count ?? 0,
+    total_lifter_count: summary.total_lifter_count ?? 0,
+    total_mechanism_count: summary.total_mechanism_count ?? 0,
+    complexity: summary.complexity || '未知',
+  }
+})
+
 const designReport = computed<DesignReport | null>(() =>
   parseEmbeddedDesignReport(state.task?.llm_report || '')
 )
diff --git a/src/moldinsight/api/advanced_router.py b/src/moldinsight/api/advanced_router.py
index 82e170d..395e852 100644
--- a/src/moldinsight/api/advanced_router.py
+++ b/src/moldinsight/api/advanced_router.py
@@ -24,42 +24,49 @@ router = APIRouter()
 cad_exporter = CADExporter()
 storage_service = StorageIntegrationService()
 
-_api_routes_cache = {}
+_cached_instances = {}
 
 
-def _get_cached(key):
-    global _api_routes_cache
-    if key not in _api_routes_cache:
-        try:
-            from api import routes
-        except Exception as e:
-            logger.warning(f"api.routes 模块加载失败: {e}")
-            _api_routes_cache["__error__"] = str(e)
+def _get_cached_import(key: str):
+    """惰性导入核心模块，避免路由器模块级加载时的循环依赖。"""
+    if key in _cached_instances:
+        return _cached_instances[key]
+    try:
+        if key == "side_action_designer":
+            from moldinsight.core.side_action_designer import SideActionDesigner
+            instance = SideActionDesigner()
+        elif key == "cavity_layout_optimizer":
+            from moldinsight.core.cavity_layout_optimizer import CavityLayoutOptimizer
+            instance = CavityLayoutOptimizer()
+        elif key == "mold_system_designer":
+            from moldinsight.core.mold_system_designer import MoldSystemDesigner
+            instance = MoldSystemDesigner()
+        elif key == "mold_cam_designer":
+            from moldinsight.core.mold_cam import MoldCAMDesigner
+            instance = MoldCAMDesigner()
+        elif key == "collision_detector":
+            from moldinsight.core.mold_machining import CollisionDetector
+            instance = CollisionDetector()
+        elif key == "toolpath_optimizer":
+            from moldinsight.core.mold_machining import ToolpathOptimizer
+            instance = ToolpathOptimizer()
+        elif key == "edm_designer":
+            from moldinsight.core.mold_machining import EDMElectrodeDesigner
+            instance = EDMElectrodeDesigner()
+        elif key == "machining_simulator":
+            from moldinsight.core.mold_machining import MachiningSimulator
+            instance = MachiningSimulator()
+        else:
             return None
-        _api_routes_cache.clear()
-        _api_routes_cache.update({
-            "tasks": routes.tasks,
-            "cavity_layout_optimizer": routes.cavity_layout_optimizer,
-            "mold_system_designer": routes.mold_system_designer,
-            "side_action_designer": routes.side_action_designer,
-            "mold_cam_designer": routes.mold_cam_designer,
-            "collision_detector": routes.collision_detector,
-            "toolpath_optimizer": routes.toolpath_optimizer,
-            "edm_designer": routes.edm_designer,
-            "machining_simulator": routes.machining_simulator,
-            "cad_exporter": routes.cad_exporter,
-        })
-    return _api_routes_cache.get(key)
+        _cached_instances[key] = instance
+        return instance
+    except Exception as e:
+        logger.warning(f"核心模块 {key} 加载失败: {e}")
+        return None
 
 
 async def _get_task_data(task_id: str) -> dict:
-    task = await redis_task_manager.get_task(task_id)
-    if task:
-        return task
-    tasks = _get_cached("tasks")
-    if tasks and task_id in tasks:
-        return tasks[task_id]
-    return None
+    return await redis_task_manager.get_task(task_id)
 
 
 async def _ensure_task_access(
@@ -193,7 +200,7 @@ async def optimize_cavity_layout(
     layout_type = body.get("layout_type", "auto")
     if cavity_count < 1 or cavity_count > 64:
         raise HTTPException(400, "型腔数量必须在 1-64 之间")
-    optimizer = _get_cached("cavity_layout_optimizer")
+    optimizer = _get_cached_import("cavity_layout_optimizer")
     if not optimizer:
         raise HTTPException(503, "服务不可用：核心模块未加载")
     result = optimizer.optimize_layout(
@@ -260,7 +267,7 @@ async def design_complete_mold_system(
     gate_type = body.get("gate_type", "auto")
     cycle_time_target = body.get("cycle_time_target")
     layout_positions = body.get("layout_positions")
-    ds = _get_cached("mold_system_designer")
+    ds = _get_cached_import("mold_system_designer")
     if not ds:
         raise HTTPException(503, "服务不可用：核心模块未加载")
     result = ds.design_complete_system(
@@ -307,7 +314,7 @@ async def detect_undercuts(
     task_data = await _get_task_data(task_id)
     if not task_data:
         raise HTTPException(404, "任务不存在")
-    sd = _get_cached("side_action_designer")
+    sd = _get_cached_import("side_action_designer")
     if not sd:
         raise HTTPException(503, "服务不可用：核心模块未加载")
     result = sd.analyze_and_design(
@@ -327,7 +334,7 @@ async def design_mold_cam(
     mold_steel = body.get("mold_steel", "P20")
     surface_quality = body.get("surface_quality", "standard")
     controller = body.get("controller", "fanuc")
-    cam = _get_cached("mold_cam_designer")
+    cam = _get_cached_import("mold_cam_designer")
     if not cam:
         raise HTTPException(503, "服务不可用：核心模块未加载")
     result = cam.design_mold_cam(
@@ -348,7 +355,7 @@ async def check_toolpath_collision(
     tool = body.get("tool", {"diameter": 10, "flute_length": 30, "shank_diameter": 10})
     stock_bbox = body.get("stock_bbox", {"min": [-50, -50, -25], "max": [50, 50, 25]})
     clamp_positions = body.get("clamp_positions")
-    cd = _get_cached("collision_detector")
+    cd = _get_cached_import("collision_detector")
     if not cd:
         raise HTTPException(503, "服务不可用：核心模块未加载")
     result = cd.check_toolpath_safety(toolpath_points, tool, stock_bbox, clamp_positions)
@@ -364,7 +371,7 @@ async def optimize_toolpath(
     toolpath_points = body.get("toolpath_points", [[0, 0, 50], [10, 10, -5], [20, 20, -10]])
     cutting_params = body.get("cutting_params", {"feed_rate_mm_min": 500})
     stock_bbox = body.get("stock_bbox")
-    to = _get_cached("toolpath_optimizer")
+    to = _get_cached_import("toolpath_optimizer")
     if not to:
         raise HTTPException(503, "服务不可用：核心模块未加载")
     result = to.optimize_toolpath(toolpath_points, cutting_params, stock_bbox)
@@ -382,7 +389,7 @@ async def design_edm_electrodes(
     material = body.get("material", "copper")
     spark_gap = body.get("spark_gap", 0.05)
     overburn = body.get("overburn", 0.1)
-    ed = _get_cached("edm_designer")
+    ed = _get_cached_import("edm_designer")
     if not ed:
         raise HTTPException(503, "服务不可用：核心模块未加载")
     result = ed.design_electrodes(undercut_regions, cavity_bbox, material, spark_gap, overburn)
@@ -398,7 +405,7 @@ async def simulate_machining(
     operations = body.get("operations", [{"strategy": "z_level_roughing", "levels": [{"z": -5}]}])
     stock_bbox = body.get("stock_bbox", {"dimensions": [100, 100, 50], "min": [-50, -50, -25], "max": [50, 50, 25]})
     resolution = body.get("resolution", 2.0)
-    ms = _get_cached("machining_simulator")
+    ms = _get_cached_import("machining_simulator")
     if not ms:
         raise HTTPException(503, "服务不可用：核心模块未加载")
     result = ms.simulate_machining(operations, stock_bbox, resolution)
diff --git a/src/moldinsight/core/mold_generator.py b/src/moldinsight/core/mold_generator.py
index 1c1dfb4..d153413 100644
--- a/src/moldinsight/core/mold_generator.py
+++ b/src/moldinsight/core/mold_generator.py
@@ -140,8 +140,11 @@ class MoldCavityGenerator(BaseMoldGenerator):
             },
             "parting_surface": parting_geometry,
             "quality_checks": {
-                "undercut_regions": cavity_data.get("undercut_regions", []),
-                "side_actions": cavity_data.get("side_actions", {}),
+                "undercut_summary": {
+                    "total_faces": len(cavity_data.get("undercut_regions", [])),
+                    "has_undercut": len(cavity_data.get("undercut_regions", [])) > 0,
+                },
+                "side_action_summary": cavity_data.get("side_actions", {}).get("summary", {}),
             },
             "manufacturing_info": {
                 "estimated_mold_size": self._calculate_mold_size(analysis),
diff --git a/src/moldinsight/core/side_action_designer.py b/src/moldinsight/core/side_action_designer.py
index c34807b..61b29d7 100644
--- a/src/moldinsight/core/side_action_designer.py
+++ b/src/moldinsight/core/side_action_designer.py
@@ -388,8 +388,24 @@ class LifterMechanismDesigner:
         }
 
     def _calculate_lifter_angle(self, region: Dict) -> float:
-        """计算斜顶角度（通常5-15度）"""
-        return 8.0
+        """基于倒扣深度和估算顶出行程计算斜顶角度（通常 5-15 度）。
+
+        angle = atan(undercut_depth / estimated_stroke)
+        """
+        bbox = region.get("bbox", {})
+        if "max" in bbox and "min" in bbox:
+            lateral = max(
+                abs(bbox["max"][0] - bbox["min"][0]),
+                abs(bbox["max"][1] - bbox["min"][1]),
+                abs(bbox["max"][2] - bbox["min"][2]),
+            )
+        else:
+            lateral = 5.0
+
+        undercut_depth = lateral * 0.4
+        estimated_stroke = max(undercut_depth * 3, 20.0)
+        angle = math.degrees(math.atan(undercut_depth / estimated_stroke))
+        return round(max(min(angle, 15.0), 5.0), 1)
 
     def _calculate_lifter_stroke(self, region: Dict) -> float:
         """计算斜顶行程"""
diff --git a/src/moldinsight/services/calculation_service.py b/src/moldinsight/services/calculation_service.py
index 16f3b05..5f4e5b4 100644
--- a/src/moldinsight/services/calculation_service.py
+++ b/src/moldinsight/services/calculation_service.py
@@ -272,13 +272,13 @@ class CalculationService:
             if quality_checks:
                 detailed_cavity_json["quality_checks"] = quality_checks
 
-            undercut_regions = quality_checks.get("undercut_regions")
-            if undercut_regions:
-                detailed_cavity_json["undercut_regions"] = undercut_regions
+            undercut_summary = quality_checks.get("undercut_summary")
+            if undercut_summary:
+                detailed_cavity_json["undercut_regions"] = []  # 详情在 scheme 级别
 
-            side_actions = quality_checks.get("side_actions")
-            if side_actions:
-                detailed_cavity_json["side_actions"] = side_actions
+            side_action_summary = quality_checks.get("side_action_summary")
+            if side_action_summary:
+                detailed_cavity_json["side_actions"] = {"summary": side_action_summary}
 
         # 添加型腔关键信息
         detailed_cavity_json["mold_cavities"]["cavity_key_info"] = {
diff --git a/src/moldinsight/services/llm_service.py b/src/moldinsight/services/llm_service.py
index d5a9648..2957bec 100644
--- a/src/moldinsight/services/llm_service.py
+++ b/src/moldinsight/services/llm_service.py
@@ -336,7 +336,7 @@ class LLMService:
             volume=f"{analysis_result.get('geometry_data', {}).get('volume', 0):.1f} mm³",
             surface_area=f"{analysis_result.get('geometry_data', {}).get('surface_area', 0):.1f} mm²",
             bbox=json.dumps(analysis_result.get("geometry_data", {}).get("bounding_box", {}), ensure_ascii=False),
-            features=features or "无特征检测数据",
+            features=trimmed or "无特征检测数据",
             quality_metrics=json.dumps(analysis_result.get("quality_metrics", {}), ensure_ascii=False, indent=2),
             schemes=schemes_text or "无分模方案数据",
             mold_material=mfg.get("mold_material", "自动选择"),
@@ -350,13 +350,12 @@ class LLMService:
         )
 
     def _build_side_action_prompt(self, analysis_result, detailed_cavity_json) -> str:
-        features = json.dumps(
-            analysis_result.get("detected_features", []),
-            ensure_ascii=False,
-            indent=2,
+        features = self._prioritize_features_for_side_action(
+            analysis_result.get("detected_features", [])
         )
-        if len(features) > 2500:
-            features = features[:2500] + "\n... (已截断)"
+        trimmed = json.dumps(features, ensure_ascii=False, indent=2)
+        if len(trimmed) > 2500:
+            trimmed = trimmed[:2500] + "\n... (已截断)"
 
         best_scheme = {}
         if detailed_cavity_json:
@@ -449,6 +448,27 @@ class LLMService:
             content = resp.json()["choices"][0]["message"]["content"]
             return content.strip() if content else None
 
+    @staticmethod
+    def _prioritize_features_for_side_action(
+        features: List[Dict[str, Any]],
+    ) -> List[Dict[str, Any]]:
+        """按倒扣/抽芯相关性排序，优先保留关键特征，避免 prompt 截断丢失重要信息。
+
+        优先级：draft_angle > high_curvature > thin_wall/thick_wall/wall_non_uniform > 其它
+        """
+        high_priority = {"draft_angle", "high_curvature"}
+        medium_priority = {"thin_wall", "thick_wall", "wall_non_uniform", "undercut"}
+        high, medium, rest = [], [], []
+        for f in features:
+            ft = f.get("feature_type", "")
+            if ft in high_priority:
+                high.append(f)
+            elif ft in medium_priority:
+                medium.append(f)
+            else:
+                rest.append(f)
+        return high + medium + rest
+
     @staticmethod
     def _parse_json_response(raw):
         try:
diff --git a/src/moldinsight/services/processing_service.py b/src/moldinsight/services/processing_service.py
index 8028d2d..9ffb2cb 100644
--- a/src/moldinsight/services/processing_service.py
+++ b/src/moldinsight/services/processing_service.py
@@ -47,7 +47,8 @@ class ProcessingService:
         self.multi_scheme_planner = MultiSchemeMoldPlanner()
         self.cad_exporter = CADExporter()
         self._export_shapes_cache: Dict[str, Dict[str, Dict[str, Any]]] = {}
-        self._occ_executor = ThreadPoolExecutor(max_workers=2, thread_name_prefix="occ")
+        # OCC 非线程安全，max_workers=1 保证所有 OCC 操作序列化执行，避免偶发崩溃
+        self._occ_executor = ThreadPoolExecutor(max_workers=1, thread_name_prefix="occ")
 
     # ─── 对外入口 ───