fix(quickshell): keep text sharp under zoom and on the lock screen

Native-rendered glyphs are rasterised at rest size, so anything moved
with `scale` stretched a bitmap and came out blurred and stepped.

- Icons render as curves, so their pulse and bump stay smooth.
- The lock face is laid out at uiScale instead of being drawn at
  1080p size and scaled by up to 1.3, and it sits on whole pixels. Its
  native labels now land on the pixel grid.
- The OSD rises into place instead of scaling in.

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

quickshell/overlays/Osd.qml

@@ -113,16 +113,20 @@ PanelWindow {
         slashWidth: 5
         padding: Theme.padM
 
+        // It rises a few pixels into place instead of growing: a scale would
+        // stretch the native text in the panel while it moves.
         opacity: root.shown ? 1 : 0
-        scale: root.shown ? 1 : 0.9
+        transform: Translate {
+            y: root.shown ? 0 : 8
+
+            Behavior on y {
+                NumberAnimation { duration: Theme.durSlow; easing.type: Easing.OutCubic }
+            }
+        }
 
         Behavior on opacity {
             NumberAnimation { id: fade; duration: Theme.durBase }
         }
-        Behavior on scale {
-            NumberAnimation { duration: Theme.durSlow; easing.type: Easing.OutCubic }
-        }
-
         Icon {
             id: glyphIcon
             anchors.left: parent.left