fix(astal-menu): focus windows via hyprlua dispatcher, not native focuswindow

The Open-windows taskbar dispatched `hyprctl dispatch focuswindow address:…`,
but this is a hyprlua setup where `hyprctl dispatch` evaluates its argument as
Lua — so the native dispatcher syntax raised a Lua parse error and nothing
happened. Switch to `hl.dsp.focus({ window = "address:…" })`, the hyprlua focus
dispatcher, which focuses the window and switches to its workspace. Verified it
moves across workspaces end-to-end.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01XUWCXM4KhjRkwheaA3X7bP

desktopenvs/hyprlua/astal-menu/ui/taskbar.py

@@ -109,6 +109,11 @@ class Taskbar(Gtk.Box):
     def _focus(self, w) -> None:
         addr = w.get("address")
         if addr:
-            run_text(["hyprctl", "dispatch", "focuswindow", f"address:{addr}"],
+            # This is a hyprlua (Lua-configured Hyprland) setup: `hyprctl dispatch`
+            # evaluates its argument as Lua, so the native `focuswindow address:…`
+            # syntax is a Lua error. Use the hyprlua focus dispatcher, which also
+            # switches to the window's workspace.
+            run_text(["hyprctl", "dispatch",
+                      f'hl.dsp.focus({{ window = "address:{addr}" }})'],
                      lambda *_a: None)
         self._on_activate()