theme: strip the remaining Persona punch from Hyprland and the popouts

Hyprland:
- Windows round at 8px, concentric with the porthole's 18px corners at
  the 10px gap, instead of square corners inside a rounded opening.
- Group tabs are solid hull slabs; the titles used to float over the
  wallpaper. The current tab is lifted a step with its title in the light.
- Motion rewritten to glide and settle: no overshoot curve, gentler
  popin, workspaces slide-fade a short way instead of sweeping the whole
  screen, and layers only fade so they never stack on quickshell's own
  slides.

Quickshell:
- Album art in the bar and the media popout is square in a hairline frame,
  not masked to a leaning chamfered shape; the accent slab under the
  popout art is gone, and a track change dips the title instead of
  tilting the art.
- The bar's equaliser is a five-hairline signal meter that rests as dots.
- Segment meters (system, battery, OSD) are 4px rows instead of 10-12px
  blocks; the toast fuse is a hairline; the clock's accent slab is a
  neutral divider.
- No hover pops: rail icons, tray icons, media transport buttons and
  P5Button no longer scale up or lunge sideways; the icon bump is reduced.

Terminal: ANSI bright black drops to #464d44. TUIs use it as a panel fill,
and at the outline grey it read as a flat light slab.

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

quickshell/overlays/Toasts.qml

@@ -80,14 +80,9 @@ PanelWindow {
                     }
                 }
 
-                // Countdown rule that drains along the bottom edge.
-                //
-                // It used to be a full-bleed rectangle across the whole toast,
-                // which meant it ran straight through the card's chopped
-                // bottom-left corner and out the other side — a stray bar
-                // hanging off the card at the one place the silhouette is
-                // supposed to be cut. It lives inside the cut now, and ends
-                // where the leaning right edge does.
+                // Countdown hairline that drains along the bottom edge. The
+                // chop and lean terms are zero under the YoRHa theme; they are
+                // kept so the fuse still fits if a shape is brought back.
                 readonly property real fuseSpan: Math.max(0,
                     width - card.chop - card.implicitHeight * card.lean)
 
@@ -96,7 +91,7 @@ PanelWindow {
                     anchors.bottom: parent.bottom
                     anchors.bottomMargin: 1
                     x: card.chop
-                    height: 2
+                    height: 1
                     width: toast.fuseSpan
                     lean: card.lean
                     color: Theme.alpha(card.tone, 0.7)