feat: add material search filters to semi, product, service modules

Co-authored-by: aider (openai/DeepSeek-V3.2-Thinking) <aider@aider.chat>

inventory-backend/app/services/inbound/service_service.py

@@ -204,3 +204,25 @@ class ServiceService:
             return users
         except Exception:
             return []
+
+    # ============================================================
+    # 获取筛选选项（类别、类型）
+    # ============================================================
+    @classmethod
+    def get_filter_options(cls):
+        try:
+            from app.models.base import MaterialBase
+            categories = db.session.query(MaterialBase.category) \
+                .filter(MaterialBase.category != None, MaterialBase.category != '') \
+                .distinct().all()
+            types = db.session.query(MaterialBase.material_type) \
+                .filter(MaterialBase.material_type != None, MaterialBase.material_type != '') \
+                .distinct().all()
+            return {
+                "categories": [r[0] for r in categories],
+                "types": [r[0] for r in types]
+            }
+        except Exception:
+            import traceback
+            traceback.print_exc()
+            return {"categories": [], "types": []}