fix: wait for Proxmox resize task before VM start (v1.2.0)

- configure_vm: capture resize UPID and call wait_for_task(120s)
  before returning; prevents lock conflict when VM is started right
  after disk resize
- resize_vm_disk / resize_container_disk (x2): same fix applied
- remove unnecessary restart_vm() after manual QEMU disk resize —
  resize is a storage-layer operation and does not require a reboot;
  the auto-restart was causing a second lock conflict

Fixes: can't lock file '/var/lock/qemu-server/lock-xxx.conf' - got timeout
Fixes: command '/usr/bin/qemu-img resize' failed: got timeout

backend/app/static/css/theme.css

@@ -3237,6 +3237,14 @@ body {
     font-size: 0.8125rem;
     font-weight: 600;
     color: var(--text-primary);
+    flex: 1;
+    min-width: 0;
+}
+
+.node-name-text {
+    overflow: hidden;
+    text-overflow: ellipsis;
+    white-space: nowrap;
 }
 
 .node-dot-online {