fix: seed pod files skip-if-exists so user edits survive restarts

seedPodFiles() copied welcome.html (as index.html), signin, account
and docs pages into the pod root unconditionally on every start,
silently clobbering any edits the pod owner had made to those files.

Seed them only when the destination does not exist, the same
skip-if-exists behaviour JSS uses for its root landing page (and the
same rule this function already applied to links.jsonld and apps/).

Author: melvincarvalho

lib/start.js

@@ -131,22 +131,23 @@ function shouldAutoOpen() {
 }
 
 // Seed jspod-owned pages into the running pod's root once JSS has
-// finished its init. Same overwrite/skip-if-exists matrix as the
-// pre-refactor CLI implementation — unchanged behaviour.
+// finished its init. All seeding is skip-if-exists, matching JSS's own
+// root-landing-page seeding: a pod owner who edits index.html (or any
+// other seeded page) must not have it clobbered on the next start.
 function seedPodFiles(root) {
   try {
-    const overwrite = [
+    const seed = [
       'welcome.html',         // becomes pod-data/index.html
       'signin.html', 'signin.html.acl',
       'account.html', 'account.html.acl',
       'docs.html', 'docs.html.acl'
     ];
-    for (const name of overwrite) {
+    for (const name of seed) {
       const src = join(PACKAGE_ROOT, name);
       // welcome.html maps onto index.html; everything else is a passthrough
       const destName = name === 'welcome.html' ? 'index.html' : name;
       const dst = join(root, destName);
-      if (existsSync(src)) copyFileSync(src, dst);
+      if (existsSync(src) && !existsSync(dst)) copyFileSync(src, dst);
     }
 
     const linksSrc = join(PACKAGE_ROOT, 'links.jsonld');