theme: workspaces drift behind the hull instead of over the bar

The hull moves to the top layer, with its transparent opening and empty input
region, so windows sliding out of the opening during a workspace switch pass
behind the frame like things behind a porthole rim rather than drawing over
the bar. A layer rule keeps the bar and the rail above it on that layer.

The animation tree is redone around that: workspaces drift 18% vertically
and fade on a slow, jolt-free "drift" curve; the SUPER+S scratchpad slides in
whole from under the bar, the same gesture as the dashboard and popouts;
windows and layers keep their calm resolve and fade.

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

quickshell/bar/Frame.qml

@@ -9,10 +9,13 @@ import "root:/config"
 // The idea is caelestia's screen border; the reading is the wallpaper's — you
 // are inside the ship, and the windows sit in the porthole.
 //
-// The hull lives on the bottom layer, under every window. Hyprland's gaps keep
-// tiled windows inside the opening, so nothing ever has to be drawn over a
-// window; a floating window dragged onto the frame simply covers it, and a
-// fullscreen one hides it, which is what should happen in both cases.
+// The hull lives on the top layer, over every window, and its opening is
+// transparent with no input region, so it covers nothing inside the opening
+// and catches no clicks. Being above the windows is the point: a workspace
+// switch slides windows *behind* the frame, the way things pass behind the
+// rim of a porthole, instead of drawing over the bar. A fullscreen window
+// still covers it, since Hyprland draws fullscreen above the top layer.
+// hypr/lua/rules/layers.lua orders it under the bar and the rail.
 //
 // The bar and the rail draw no surface of their own and ignore exclusive
 // zones, so every piece is placed from the screen edge. The four zones are
@@ -29,7 +32,7 @@ Scope {
 
         screen: root.modelData
 
-        WlrLayershell.layer: WlrLayer.Bottom
+        WlrLayershell.layer: WlrLayer.Top
         WlrLayershell.namespace: "takemi-frame"
         WlrLayershell.keyboardFocus: WlrKeyboardFocus.None
         exclusionMode: ExclusionMode.Ignore