Merge tag 'ui-pull-request' of https://gitlab.com/marcandre.lureau/qemu into staging

UI-related

- vdagent migration support
- gtk: improve scale handling

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# gpg: Signature made Sat 24 May 2025 13:34:36 EDT
# gpg:                using RSA key 87A9BD933F87C606D276F62DDAE8E10975969CE5
# gpg:                issuer "marcandre.lureau@redhat.com"
# gpg: Good signature from "Marc-André Lureau <marcandre.lureau@redhat.com>" [full]
# gpg:                 aka "Marc-André Lureau <marcandre.lureau@gmail.com>" [full]
# Primary key fingerprint: 87A9 BD93 3F87 C606 D276  F62D DAE8 E109 7596 9CE5

* tag 'ui-pull-request' of https://gitlab.com/marcandre.lureau/qemu:
  ui/gtk-egl: Render guest content with padding in fixed-scale mode
  ui/gtk-gl-area: Render guest content with padding in fixed-scale mode
  ui/gtk: Consider scaling when propagating ui info
  ui/gtk: Don't update scale in fixed scale mode in gtk-egl.c
  ui/sdl: Consider scaling in mouse event handling
  ui/gtk: Update scales in fixed-scale mode when rendering GL area
  gtk/ui: Introduce helper gd_update_scale
  ui/gtk: Use consistent naming for variables in different coordinates
  ui/gtk: Document scale and coordinate handling
  ui/vdagent: remove migration blocker
  ui/vdagent: add migration support
  ui/vdagent: factor out clipboard peer registration
  ui/vdagent: keep "connected" state
  ui/vdagent: replace Buffer with GByteArray
  ui/clipboard: delay clipboard update when not running
  ui/clipboard: add vmstate_cbinfo
  ui/clipboard: split out QemuClipboardContent
  ui/clipboard: use int for selection field
  ui/gtk: warn if setting the clipboard failed

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>