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/bar/Clock.qml

@@ -53,16 +53,15 @@ BarPill {
             }
         }
 
-        // Declared with room for its own lean, so the slash sits inside the box
-        // the Row gave it instead of hanging several px into the date column.
-        Skew {
+        // A hairline between the date and the time.
+        Rectangle {
             anchors.verticalCenter: parent.verticalCenter
-            width: 22 * Theme.skew + 3
-            height: 22
-            color: Theme.alpha(Theme.accent, 0.6)
+            width: 1
+            height: 18
+            color: Theme.alpha(Theme.outline, 0.6)
         }
 
-        // Archivo Black's digits are not all the same width, so a clock sized to
+        // The display face's digits are not all the same width, so a clock sized to
         // its own text changed width as the minutes rolled over — 11:11 is
         // several px narrower than 08:48 — and shoved the rest of the bar
         // around. Reserve the widest possible reading and centre inside it.