Stop clipping the cat at the window edge

The cat was drawn in a 100 x 90 box that was exactly the window, so anything
reaching past it was cut off: the right whiskers always, and more of them in
poses that push the head forward, up to art x 109 while stretching.

The window box is now 120 x 106 with the drawing inset at (7, 14). The slack is
symmetric on purpose, because facing left mirrors the art about the box centre,
so asymmetric slack would clip the other side instead.

The mood-name mapper grew the shared aspect ratio and became CatDefs, so every
window sizes the cat the same way. Nose and mug offsets follow the new inset.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

qml/OverlayWindow.qml

@@ -18,7 +18,7 @@ Window {
     property bool overlayActive: false
 
     readonly property int catW: settings.catSize
-    readonly property int catH: Math.round(settings.catSize * 0.9)
+    readonly property int catH: Math.round(settings.catSize * CatDefs.aspect)
     readonly property real groundY: height - catH - settings.bottomMargin
 
     // Only the cat itself should swallow clicks; everything else falls through.
@@ -88,7 +88,7 @@ Window {
             anchors.fill: parent
             coat: win.settings.coat
             facingRight: win.cat.facingRight
-            mood: CatMoods.name(win.cat.mood)
+            mood: CatDefs.mood(win.cat.mood)
             lifted: win.cat.dragging
             petted: win.cat.hovered && !win.cat.dragging
             look: win.cat.look