Wayland backend: desktop icons v2, menu rebuild, layer-shell/scale fixes,

XWayland stability, GPU rendering, and multi-cursor Phase 2

The bulk of a multi-session shift's real work landed in crates/wayland.
Full root-cause/verification narrative for every item below lives in
docs/TODO.md (each has its own dated entry); this is the summary:

Desktop shell:
- Real desktop icons v2 (state/desktop_icons.rs, desktop_icons.rs):
  fixed origin-baked-before-the-bar-connects, fixed-icon sort order, and
  a proper Rename/Delete-to-Trash menu (window_memory.rs backs the
  rename-persistence side). Rubber-band marquee multi-select.
- icon_theme.rs: real freedesktop icon-theme lookup (inherits chain,
  hicolor fallback) rendering actual theme SVGs via resvg/tiny-skia,
  replacing the hand-drawn placeholder glyphs.
- Context/desktop menus (decoration.rs, desktop_menu.rs, state/menu.rs)
  rebuilt to match the project's own AGS panel styling: rounded floating
  panel, tinted-fill row highlight, real separators, a much fuller
  titlebar window-menu action set.

Layer-shell / multi-monitor:
- Layer-shell hit-testing and render positioning (input/pointer.rs,
  udev/render.rs's element placement) now correctly convert LayerMap's
  logical geometry into physical pixels on a fractionally-scaled output
  - root cause of a bottom-anchored dock being unclickable and
  unpainted while a top-anchored bar on the same output worked.
  udev/outputs.rs's relayout_outputs gained the same physical/logical
  split for cross-output positioning, now backed by a real unit test
  (next_logical_x) built from the original measured incident numbers.
- state/geometry.rs: a window's border/decoration no longer briefly
  clips when moved between differently-scaled monitors mid-drag.

XWayland / stability:
- xwayland.rs, udev/session.rs, udev/platform.rs: fixed a 100%-
  reproducible cold-start XKEYBOARD crash-loop (XWayland's own stdin
  inherited a real, already-owned VT; env passthrough and idle-callback
  spawn timing were both real, independent gaps) that had silently taken
  down all X11-app support and the global-menu registrar every session.
- state/toplevel.rs, state/lifecycle.rs: XWayland dialog detection via
  WM_TRANSIENT_FOR, not just a native xdg_toplevel parent.

Rendering:
- udev/render.rs, decoration.rs: real GPU (GBM+EGL+DrmCompositor)
  window-content and cursor rendering on the udev backend, falling back
  to the untouched Pixman path automatically on any init failure.
- decoration/tests.rs, state/mod.rs: rounded-corner/border fixes for
  interactive resize lag and cross-monitor moves.

Multi-cursor Phase 2 (virtual_pointer.rs, new; state/mod.rs, udev/
platform.rs, winit/nested_platform.rs): pins a zwlr_virtual_pointer_
unstable_v1 object to a specific window, bypassing the shared seat/
focus/pointer_pos path entirely via hand-rolled wl_pointer.enter/motion/
button/frame/leave against every WlPointer the target client has bound
(PointerHandle::client_pointers). Lets an agent operate one window while
a human uses another, genuinely simultaneously, with zero client
cooperation and no second wl_seat (confirmed a dead end: real clients
only ever bind the first seat advertised).

Full workspace build/test/clippy clean.

1 files changed, 18 insertions, 0 deletions

diff --git a/crates/wayland/src/state/menu.rs b/crates/wayland/src/state/menu.rs
index 9f645a8..b8cf094 100644
--- a/crates/wayland/src/state/menu.rs
+++ b/crates/wayland/src/state/menu.rs
@@ -45,14 +45,32 @@ impl CompState {
                 self.sync_geometry(window);
                 foreign_toplevel::send_state(self, window);
             }
+            MenuAction::ToggleFullscreen => {
+                self.wm.borrow_mut().toggle_fullscreen(window);
+                self.sync_geometry(window);
+                foreign_toplevel::send_state(self, window);
+            }
+            MenuAction::ToggleFloating => {
+                self.wm.borrow_mut().toggle_floating(window);
+                self.sync_geometry(window);
+            }
             MenuAction::ToggleAlwaysOnTop => {
                 self.wm.borrow_mut().toggle_always_on_top(window);
             }
+            MenuAction::MoveToWorkspace(workspace) => {
+                self.wm.borrow_mut().move_window_to_workspace(window, workspace);
+            }
             MenuAction::Close => {
                 if let Some(w) = self.id_to_window.get(&window) {
                     crate::input::close_dwindow(w);
                 }
             }
+            // Never actually reached: the click-dispatch site
+            // (`input/pointer.rs`) intercepts `Separator` before calling
+            // this function at all. Handled here too so this match stays
+            // exhaustive without a catch-all that would silently swallow a
+            // real future variant added without updating this function.
+            MenuAction::Separator => {}
         }
     }