motion: call the curve bank the shell has always carried

Appearance.animationCurves is Material 3 Expressive and every spatial
curve in it overshoots. Twelve souveraine surfaces, 31 hand-typed linear
animations, three calls into that bank from two files.

The card's entry rise is gated on inFlight; unguarded it is TASK-60's
second writer over the carry.

surfaces/quickshell/modules/souveraine/navigation/SystemGestureRail.qml

@@ -309,16 +309,20 @@ PanelWindow {
             NumberAnimation { target: handle; property: "scale"; to: 1.0; duration: 220; easing.type: Easing.InOutQuad }
         }
 
+        // All three off the house bank rather than hand-typed linear ramps.
+        // Still gated on `!dragging` — while the thumb is on the pill the
+        // handle tracks it directly and a Behavior would put a curve between
+        // the finger and the thing it is holding.
         Behavior on width {
             enabled: !rail.dragging
-            NumberAnimation { duration: 120 }
+            animation: Appearance.animation.elementMoveSmall.numberAnimation.createObject(this)
         }
         Behavior on color {
-            ColorAnimation { duration: 140 }
+            animation: Appearance.animation.elementMoveFast.colorAnimation.createObject(this)
         }
         Behavior on y {
             enabled: !rail.dragging
-            NumberAnimation { duration: 160; easing.type: Easing.OutCubic }
+            animation: Appearance.animation.elementMoveSmall.numberAnimation.createObject(this)
         }
     }
 

surfaces/quickshell/modules/souveraine/navigation/ZoneOverview.qml

@@ -134,10 +134,13 @@ Item {
         // and must not be smoothed, or the cards lag the fingers that are
         // moving them.
         enabled: root.open || ZoneTransition.travel === 0
-        NumberAnimation {
+        // `elementMoveEnter` rather than a hand-typed OutCubic. The house
-            duration: 260
+        // curve bank is Material 3 Expressive and every one of its spatial
-            easing.type: Easing.OutCubic
+        // curves overshoots — the shell has carried it since ii and only
-        }
+        // `SubconsciousTicker` and `AgentMessage` had ever called it, so every
+        // navigation surface animated on a flat cubic. That is the missing
+        // whoosh, and it was a two-line import away the whole time.
+        animation: Appearance.animation.elementMoveEnter.numberAnimation.createObject(this)
     }
 
     // Ask the moment this becomes visible. Cheap, and the whole answer to why
@@ -318,7 +321,27 @@ Item {
             scale: 1 - 0.07 * zoneCard.depth
             opacity: zoneCard.share * (1 - 0.4 * Math.min(1, zoneCard.depth))
             Behavior on scale {
-                NumberAnimation { duration: 180; easing.type: Easing.OutCubic }
+                animation: Appearance.animation.elementMoveSmall.numberAnimation.createObject(this)
+            }
+
+            // The card arrives rather than fading in place.
+            //
+            // A separate transform, and deliberately with **no** Behavior of its
+            // own: `share` is continuous — it is `progress` remapped — so it is
+            // already smoothed by the Behavior on `progress` above. Folding it
+            // into `scale` would put a 350 ms animation under a value that
+            // changes every frame, which restarts the animation every frame and
+            // reads as lag rather than as motion. `depth` is step-like and is
+            // the one that wants a Behavior.
+            //
+            // Gated on `inFlight` for the same reason `depth` is: while the
+            // compositor carries a real window onto this rect, a card that also
+            // scales is TASK-60's two-writer fault exactly.
+            transform: Scale {
+                origin.x: zoneCard.width / 2
+                origin.y: zoneCard.height / 2
+                xScale: ZoneTransition.inFlight ? 1 : 0.90 + 0.10 * zoneCard.share
+                yScale: xScale
             }
 
             // No `scale` tied to the *gesture*, and that absence is the point of
@@ -540,7 +563,9 @@ Item {
         anchors.bottom: parent.bottom
         anchors.margins: 12
         height: ZoneTransition.trayHeight - 12
-        opacity: root.progress
+        // The verbs carry their own staggered fade now, so this band no longer
+        // multiplies one over the top of them — squaring the ramp made the row
+        // arrive late and all at once, which is the opposite of the stagger.
         transform: Translate { y: (1 - root.progress) * 24 }
 
         Row {
@@ -555,6 +580,7 @@ Item {
             // where you left it — which makes multitasking the only place it is
             // findable, and therefore the only honest place to turn it off.
             TrayVerb {
+                order: 0
                 symbol: root.subject && root.subject.floating === true
                     ? "picture_in_picture_off" : "picture_in_picture"
                 caption: root.subject && root.subject.floating === true
@@ -576,6 +602,7 @@ Item {
             // `Some(w) if w >= count => self.workspaces.push()`, so asking for
             // the zone past the end *is* the mint. One button, no new verb.
             TrayVerb {
+                order: 1
                 symbol: "add_to_queue"
                 caption: qsTr("New zone")
                 active: root.subject !== null
@@ -592,6 +619,7 @@ Item {
             // a row of cards is the wrong place to take that choice away.
             // Force lives on the sheet, behind a hold, where it is deliberate.
             TrayVerb {
+                order: 2
                 symbol: "clear_all"
                 caption: qsTr("Close all")
                 active: root.restingZone !== null
@@ -610,7 +638,8 @@ Item {
             anchors.bottomMargin: 4
             horizontalAlignment: Text.AlignHCenter
             elide: Text.ElideRight
-            opacity: root.spoken.length > 0 ? 0.95 : 0.55
+            // Times `progress`, which the band used to apply for it.
+            opacity: root.progress * (root.spoken.length > 0 ? 0.95 : 0.55)
             text: root.note
         }
     }
@@ -623,12 +652,27 @@ Item {
         id: verb
         required property string symbol
         required property string caption
+        // Where in the row this one sits, so the band arrives as a sentence
+        // rather than as a block. Named at the call site rather than taken from
+        // a Repeater index because the three verbs are three deliberate things,
+        // not a model.
+        required property int order
         property bool active: true
         signal triggered
 
         width: 84
         height: 78
-        opacity: verb.active ? 1 : 0.35
+
+        // Each verb starts 6% of the climb after the one before it, so the row
+        // lands left to right. Capped by the same `min(1, …)` shape the cards
+        // use, so a fully open tray is fully opaque and not 94% of one.
+        readonly property real share: {
+            const start = verb.order * 0.06;
+            return Math.max(0, Math.min(1, (root.progress - start) / (1 - start)));
+        }
+
+        opacity: verb.share * (verb.active ? 1 : 0.35)
+        transform: Translate { y: (1 - verb.share) * 14 }
 
         RippleButton {
             id: hit
@@ -639,6 +683,15 @@ Item {
             buttonRadius: 26
             enabled: verb.active
             onClicked: verb.triggered()
+            // The bank's own bounce, which nothing outside the subconscious
+            // ticker had ever used. `expressiveDefaultSpatial` overshoots to
+            // 1.21, so the button comes back past its resting size and settles
+            // — the difference between a control that acknowledges a thumb and
+            // one that merely changes colour under it.
+            scale: hit.down ? 0.90 : 1
+            Behavior on scale {
+                animation: Appearance.animation.clickBounce.numberAnimation.createObject(this)
+            }
             contentItem: MaterialSymbol {
                 anchors.centerIn: parent
                 text: verb.symbol

surfaces/quickshell/modules/souveraine/windowSheet/SheetButton.qml

@@ -51,8 +51,14 @@ Item {
         border.color: Appearance.colors.colLayer1Active
 
         scale: area.pressed ? 0.94 : 1.0
-        Behavior on scale { NumberAnimation { duration: 90 } }
+        // The house bounce, which overshoots on the way back — a flat 90 ms
-        Behavior on color { ColorAnimation { duration: 90 } }
+        // ramp is a size change, not an acknowledgement.
+        Behavior on scale {
+            animation: Appearance.animation.clickBounce.numberAnimation.createObject(this)
+        }
+        Behavior on color {
+            animation: Appearance.animation.elementMoveFast.colorAnimation.createObject(this)
+        }
 
         MaterialSymbol {
             anchors.centerIn: parent