feat(FN-3624): fix modal scrolling and add mobile modal tests

The merge adds task creation replication across mesh nodes (FN-3631) alongside UI fixes for modal scrolling in the dashboard, particularly the ScriptsModal and GitManagerModal, with corresponding mobile tests. It also hardens the bundle-output test runner's npm execpath fallback logic (FN-3624).

Fusion-Task-Id: FN-3624

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

@@ -11,7 +11,7 @@ export const dashboardClientStubMarker = "Dashboard assets not built";
 
 function runBuildCommand(command: string, cwd: string) {
   const npmExecPath = process.env.npm_execpath;
-  if (npmExecPath) {
+  if (npmExecPath && existsSync(npmExecPath)) {
     execFileSync(process.execPath, [npmExecPath, ...command.split(" ")], {
       cwd,
       stdio: "pipe",