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

app/simulation/core/ports.py

@@ -3,6 +3,8 @@ from __future__ import annotations
 from dataclasses import dataclass, field
 from typing import Literal
 
+from .port_computation import IMPLICIT_PNEUMATIC, PortComputation
+
 
 PortKind = Literal["physical", "signal"]
 PortNominalRole = Literal["inlet", "outlet", "bidirectional", "input", "output"]
@@ -45,6 +47,7 @@ class PortDefinition:
     nominal_role: PortNominalRole
     positive_flow_direction: Literal["intoComponent"] | None = None
     variables: tuple[PortVariableDefinition, ...] = ()
+    computation: PortComputation | None = None
 
     @classmethod
     def pneumatic(
@@ -52,6 +55,7 @@ class PortDefinition:
         name: str,
         *,
         nominal_role: Literal["inlet", "outlet", "bidirectional"] = "bidirectional",
+        computation: PortComputation = IMPLICIT_PNEUMATIC,
     ) -> PortDefinition:
         return cls(
             name=name,
@@ -59,6 +63,7 @@ class PortDefinition:
             domain="pneumatic",
             nominal_role=nominal_role,
             positive_flow_direction="intoComponent",
+            computation=computation,
             variables=(
                 PortVariableDefinition(
                     "p",
@@ -188,6 +193,7 @@ class PortDefinition:
             "nominalRole": self.nominal_role,
             "positiveFlowDirection": self.positive_flow_direction,
             "variables": [variable.as_interface_dict() for variable in self.variables],
+            **({"computation": self.computation.as_dict()} if self.computation else {}),
         }