feat: extend stall timeout and remove sample cap

frontend/tests/e2e/simulation-timeout.spec.ts

@@ -0,0 +1,21 @@
+import { expect, test } from "@playwright/test";
+
+import {
+  SIMULATION_SOLVER_STALL_TIMEOUT_MINUTES,
+  SIMULATION_SOLVER_STALL_TIMEOUT_MS,
+  solverStallTimeoutMessage,
+  solverStallTimeoutReached,
+} from "../../src/simulationTimeout";
+
+test("solver stall watchdog allows the validated long-running window", () => {
+  expect(SIMULATION_SOLVER_STALL_TIMEOUT_MINUTES).toBe(15);
+  expect(SIMULATION_SOLVER_STALL_TIMEOUT_MS).toBe(900_000);
+  expect(solverStallTimeoutReached(1_000, 900_999)).toBe(false);
+  expect(solverStallTimeoutReached(1_000, 901_000)).toBe(true);
+});
+
+test("solver stall messages use the configured duration", () => {
+  expect(solverStallTimeoutMessage("detected")).toContain("连续 15 分钟");
+  expect(solverStallTimeoutMessage("recovering")).toContain("连续 15 分钟");
+  expect(solverStallTimeoutMessage("recovering")).toContain("恢复部分结果");
+});