Replace Python numerical kernels with native C execution

frontend/src/App.tsx

@@ -461,16 +461,16 @@ type SimulationResult = {
   final: Record<string, number>;
   series: Record<string, number[]>;
   diagnostics: {
-    pressureFlow: {
+    pressureFlow?: {
       solveCount: number;
       maxScaledResidual: number;
       maxEvaluationsPerSolve: number;
     };
-    stream: {
+    stream?: {
       maxIterationsPerSolve: number;
     };
     stateCount: number;
-    sampleCount: number;
+    sampleCount?: number;
   };
 };
 
@@ -1259,7 +1259,7 @@ export function observeSimulationActivityWatchdog(
     },
   };
 }
-const SUPPORTED_SOLVER_METHODS = ["BDF", "Radau", "LSODA", "RK45", "RK23", "DOP853"];
+const SUPPORTED_SOLVER_METHODS = ["BDF", "RK45"];
 const simulationConfigLabels: Record<SimulationNumericKey, string> = {
   t_start: "起始时间",
   t_stop: "结束时间",
@@ -7374,7 +7374,7 @@ function FlowWorkbench() {
   ) => {
     const resultStatus = result.status ?? (result.success ? "completed" : "failed");
     const sampleCount = Math.min(
-      result.diagnostics.sampleCount,
+      result.diagnostics.sampleCount ?? result.series.time?.length ?? 0,
       result.series.time?.length ?? 0,
     );
     const hasUsableSamples = sampleCount >= 2;
@@ -7403,6 +7403,11 @@ function FlowWorkbench() {
       failed: `仿真异常终止，已保留计算至 ${simulatedUntil} s 的 ${sampleCount} 个采样点`,
     } as const;
     const statusMessage = statusMessages[resultStatus];
+    const maxScaledResidual = result.diagnostics.pressureFlow?.maxScaledResidual;
+    const residualMessage =
+      typeof maxScaledResidual === "number" && Number.isFinite(maxScaledResidual)
+        ? `；最大方程残差 ${formatNumber(maxScaledResidual)}`
+        : "";
 
     if (resultStatus === "completed") {
       setSimulationProgress({
@@ -7415,7 +7420,7 @@ function FlowWorkbench() {
       });
       appendConsoleEntry(
         "success",
-        `${statusMessage}，可在“结果”页签查看；最大方程残差 ${formatNumber(result.diagnostics.pressureFlow.maxScaledResidual)}`,
+        `${statusMessage}，可在“结果”页签查看${residualMessage}`,
       );
     } else {
       setSimulationProgress((current) => ({
@@ -7444,7 +7449,10 @@ function FlowWorkbench() {
       id: `simulation-${Date.now()}`,
       createdAt: new Date().toISOString(),
       project: cloneValue(project),
-      result: cloneValue(result),
+      result: cloneValue({
+        ...result,
+        diagnostics: { ...result.diagnostics, sampleCount },
+      }),
     };
     setResultSnapshot(nextSnapshot);
     storeResultSnapshot(nextSnapshot);

frontend/src/SimulationResultsView.tsx

@@ -146,12 +146,12 @@ type ResultPayload = {
         stateTransitionTimes?: number[];
       }>;
     };
-    pressureFlow: {
+    pressureFlow?: {
       solveCount: number;
       maxScaledResidual: number;
       maxEvaluationsPerSolve: number;
     };
-    stream: {
+    stream?: {
       maxIterationsPerSolve: number;
     };
     stateCount: number;

frontend/tests/e2e/native-result.spec.ts

@@ -0,0 +1,42 @@
+import { expect, test } from "@playwright/test";
+import { expandSimulationConsole, prepareApp, resultSnapshot, wideProject } from "./fixtures";
+
+for (const diagnosticsMode of ["native", "legacy-native", "python"] as const) {
+  test(`completed ${diagnosticsMode} results can be published and restored`, async ({ page }) => {
+    await prepareApp(page);
+    const diagnostics = diagnosticsMode === "python"
+      ? resultSnapshot.result.diagnostics
+      : { backend: "native-c", stateCount: 1,
+          ...(diagnosticsMode === "native" ? { sampleCount: 3 } : {}) };
+    await page.route("**/api/system-xml/simulate-stream", route => route.fulfill({
+      contentType: "application/x-ndjson",
+      body: JSON.stringify({ event: "result", progress: 100, phase: "completed",
+        result: { ...resultSnapshot.result, diagnostics } }) + "\n",
+    }));
+    await page.goto("/");
+    await page.locator('input[type="file"]').setInputFiles({
+      name: "native-result.json", mimeType: "application/json",
+      buffer: Buffer.from(JSON.stringify({ ...wideProject, edges: [...wideProject.edges, {
+        id: "close-test-loop", source: "generic_sensor_4", target: "generic_sensor_1",
+        sourceHandle: "port_b", targetHandle: "port_a", data: { isContactEdge: false },
+      }] })),
+    });
+    await expect(page.getByRole("textbox", { name: "工程", exact: true })).toHaveValue(wideProject.name);
+    await page.getByRole("button", { name: "运行仿真", exact: true }).click();
+    await expandSimulationConsole(page);
+    const consolePanel = page.getByRole("complementary", { name: "仿真控制台", exact: true });
+    await expect(consolePanel).toContainText("仿真完成，已生成新的结果，共 3 个采样点");
+    await expect(consolePanel).not.toContainText("仿真失败");
+    if (diagnosticsMode === "python") {
+      await expect(consolePanel).toContainText("最大方程残差 0");
+    } else {
+      await expect(consolePanel).not.toContainText("最大方程残差");
+    }
+    const saved = await page.evaluate(() => JSON.parse(sessionStorage.getItem("system-simulation-flow:latest-result") ?? "null"));
+    expect(saved.result.diagnostics.sampleCount).toBe(3);
+    expect(saved.result.series).toEqual(resultSnapshot.result.series);
+    await page.reload();
+    await page.getByRole("tab", { name: "结果", exact: true }).click();
+    await expect(page.getByText("3 个采样点", { exact: false }).first()).toBeVisible();
+  });
+}