前端进度条性能优化、仿真结束后后处理优化；后端C代码生成流程优化：先识别来源，再按照已知未知量需求排序，最后局部求解

schemas/component-catalog-v1.schema.json

@@ -102,6 +102,23 @@
         }
       }
     },
+    "portComputation": {
+      "type": "object",
+      "additionalProperties": false,
+      "required": ["mode", "inputs", "outputs"],
+      "properties": {
+        "mode": {"enum": ["equation", "fixed"]},
+        "inputs": {
+          "type": "array", "uniqueItems": true,
+          "items": {"enum": ["p", "T", "m_flow", "H_flow"]}
+        },
+        "outputs": {
+          "type": "array", "uniqueItems": true,
+          "items": {"enum": ["p", "T", "m_flow", "H_flow"]}
+        },
+        "referencePort": {"$ref": "#/$defs/machineId"}
+      }
+    },
     "port": {
       "type": "object",
       "additionalProperties": false,
@@ -149,6 +166,7 @@
             "$ref": "#/$defs/portVariable"
           }
         },
+        "computation": {"$ref": "#/$defs/portComputation"},
         "side": {
           "enum": [
             "left",