Fix SSH key creation as a uid without passwd entry (ssh-keygen, ssh-keyscan, ssh-add wrappers)

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

web/src/whatsnew.ts

@@ -3,6 +3,10 @@
  * under "unreleased"; scripts/release.sh renames the key to the release version.
  */
 export const WHATS_NEW: Record<string, { en: string[]; de: string[] }> = {
+  unreleased: {
+    en: ["Creating SSH keys works in the container now (fixes \"No user exists for uid\")"],
+    de: ["SSH-Schlüssel lassen sich im Container jetzt erzeugen (behebt \"No user exists for uid\")"],
+  },
   "202611-00034": {
     en: ["ssh/scp/sftp now work in the container (fixes \"No user exists for uid\")"],
     de: ["ssh/scp/sftp funktionieren jetzt im Container (behebt \"No user exists for uid\")"],