feat: extend stall timeout and remove sample cap

frontend/src/App.tsx

@@ -108,6 +108,10 @@ import {
   LMECHN1_MAX_RIGHT_PORT_COUNT,
   lmechn1RightPortCount,
 } from "./componentSymbols/mechanical";
+import {
+  solverStallTimeoutMessage,
+  solverStallTimeoutReached,
+} from "./simulationTimeout";
 import {
   CONTACT_AWARE_EDGE_TYPE,
   contactAwareEdgeTypes,
@@ -559,7 +563,6 @@ const PALETTE_COLLAPSED_SECTIONS_KEY =
 const PALETTE_ICON_PREVIEW_DELAY_MS = 500;
 const CONSOLE_VIEWPORT_MARGIN = 8;
 const SIMULATION_STREAM_IDLE_TIMEOUT_MS = 30_000;
-const SIMULATION_SOLVER_STALL_TIMEOUT_MS = 60_000;
 const GRID_SIZE = CANVAS_GRID_SIZE;
 const MODELING_DEFAULT_EDGE_OPTIONS = {
   interactionWidth: 28,
@@ -7401,7 +7404,7 @@ function FlowWorkbench() {
           appendConsoleEntry(
             "error",
             error.code === "SOLVER_STALLED"
-              ? "求解器连续 60 秒没有接受新积分步，正在终止任务并恢复部分结果"
+              ? solverStallTimeoutMessage("recovering")
               : "超过 30 秒未收到后端数据，正在终止任务并恢复部分结果",
           );
           try {
@@ -10936,10 +10939,10 @@ async function streamSystemSimulation(
     if (event.event === "progress") {
       if (
         event.heartbeat === true &&
-        Date.now() - lastSolverProgressAt >= SIMULATION_SOLVER_STALL_TIMEOUT_MS
+        solverStallTimeoutReached(lastSolverProgressAt)
       ) {
         throw new SimulationStreamError(
-          "求解器连续 60 秒没有接受新的积分步，任务可能已经卡死",
+          solverStallTimeoutMessage("detected"),
           [],
           undefined,
           "SOLVER_STALLED",