fix(FN-000): stabilize failing tests and trim slow waits

packages/cli/src/__tests__/bundle-output-helpers.ts

@@ -1,5 +1,5 @@
-import { execSync } from "node:child_process";
-import { readFileSync } from "node:fs";
+import { execFileSync, execSync } from "node:child_process";
+import { existsSync, readFileSync } from "node:fs";
 import { join } from "node:path";
 
 export const cliRoot = join(__dirname, "..", "..");
@@ -10,6 +10,16 @@ export const clientIndexPath = join(cliRoot, "dist", "client", "index.html");
 export const dashboardClientStubMarker = "Dashboard assets not built";
 
 function runBuildCommand(command: string, cwd: string) {
+  const npmExecPath = process.env.npm_execpath;
+  if (npmExecPath) {
+    execFileSync(process.execPath, [npmExecPath, ...command.split(" ")], {
+      cwd,
+      stdio: "pipe",
+      timeout: 240_000,
+    });
+    return;
+  }
+
   execSync(command, {
     cwd,
     stdio: "pipe",
@@ -17,11 +27,23 @@ function runBuildCommand(command: string, cwd: string) {
   });
 }
 
+function hasBuiltDashboardAssets(): boolean {
+  if (!existsSync(bundlePath) || !existsSync(clientIndexPath)) {
+    return false;
+  }
+
+  return !readFileSync(clientIndexPath, "utf-8").includes(dashboardClientStubMarker);
+}
+
 /**
  * This suite verifies real copied dashboard client assets in CLI dist output.
  * It must build those assets explicitly instead of skip-gating on ambient dist/.
  */
 export function buildCliWithRealDashboardAssets() {
+  if (hasBuiltDashboardAssets()) {
+    return;
+  }
+
   runBuildCommand("pnpm --filter @fusion/dashboard build:client", workspaceRoot);
   runBuildCommand("pnpm build", cliRoot);
 }