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/systems/network.py

@@ -6,6 +6,9 @@ from app.simulation.core.base import Component, DynamicComponent
 from app.simulation.core.equations import EquationDefinition
 from app.simulation.core.metadata import ResultVariableMetadata
 from app.simulation.core.ports import PortState
+from app.simulation.core.port_computation import (
+    PortSupplyError, port_supply_issue, reference_supply_issues,
+)
 
 
 @dataclass(frozen=True)
@@ -110,6 +113,10 @@ class SimulationNetwork:
             raise ValueError(
                 f"Connection variable contracts do not match: {endpoint_a}, {endpoint_b}."
             )
+        supply_issue = port_supply_issue(first_definition, second_definition,
+                                         str(endpoint_a), str(endpoint_b))
+        if supply_issue:
+            raise PortSupplyError(supply_issue)
         if first_definition.kind == "signal" and {
             first_definition.nominal_role,
             second_definition.nominal_role,
@@ -161,6 +168,22 @@ class SimulationNetwork:
         self.connections.append(connection)
         return connection
 
+    def validate_port_supplies(self) -> None:
+        """Validate again at compile time, including manually assembled networks."""
+        ports = {(c.name, p.name): p for c in self.components.values()
+                 for p in c.active_port_definitions}
+        adjacency = {}
+        for edge in self.connections:
+            a, b = (endpoint.key for endpoint in edge.endpoints)
+            issue = port_supply_issue(ports[a], ports[b], '.'.join(a), '.'.join(b))
+            if issue:
+                raise PortSupplyError(issue)
+            if edge.kind == 'physical':
+                adjacency[a], adjacency[b] = b, a
+        issues = reference_supply_issues(ports, adjacency)
+        if issues:
+            raise PortSupplyError(issues[0])
+
     def _port_for(self, endpoint: Endpoint) -> PortState:
         try:
             component = self.components[endpoint.component]