Stop lists and sliders from losing input under the user

WifiList and the notification toasts built their model from a plain
computed array, so any background property tick (a scan result, an
unrelated notification arriving) reassigned the whole array and the
Repeater destroyed and recreated every delegate -- including one with
an open, focused password field or an in-progress reply. Switched
both to a ScriptModel, which diffs by identity instead of resetting.

ValueSlider had its pointer-to-value mapping offset by 16px (the
hit-area margin was applied with the wrong sign), so 0% was
unreachable and every click landed to the right of where it was
placed -- affects every slider in the shell. SliderRow used -1 as a
sentinel for "nothing pending," which collides with legitimate
negative preference values like pointer sensitivity.

Dock intellihide read the globally focused workspace instead of each
monitor's own, so an empty workspace on one screen could hide the
dock on another; ActivityPanel rebuilt every row once a second during
a recording because the elapsed-time read lived in the model
construction instead of each row's own binding.

Claude-Session: https://claude.ai/code/session_01E6TJUAh41HaP25MVHWkhRZ

config/dot/quickshell/modules/dock/Dock.qml

@@ -48,12 +48,22 @@ PanelWindow {
     implicitHeight: tooltipSpace + body.implicitHeight + bottomMargin
 
     // ── Intellihide ─────────────────────────────────────────────────────────
+    // This instance's own monitor, the same lookup Workspaces.qml uses to
+    // scope a per-screen bar to its own screen. Falls back to null when this
+    // Dock is created standalone (no `screen` set) rather than via Variants.
+    readonly property HyprlandMonitor monitor: root.screen ? Hyprland.monitorFor(root.screen) : null
+
     // Hyprland does not expose live toplevel geometry, so exact overlap cannot
     // be computed. "Is anything on this workspace at all" is the robust proxy,
     // and it is what Dash-to-Dock's all-windows intellihide felt like in
     // practice: an empty workspace keeps the dock out.
+    //
+    // Deliberately this instance's own monitor's active workspace, not the
+    // globally-focused one -- with one Dock per screen, keying off the global
+    // focus would make focusing an empty workspace on monitor A hide the dock
+    // on monitor B even though B's own workspace is still busy.
     readonly property bool workspaceOccupied: {
-        const ws = Hyprland.focusedWorkspace;
+        const ws = root.monitor ? root.monitor.activeWorkspace : Hyprland.focusedWorkspace;
         return !!ws && ws.toplevels.values.length > 0;
     }
 
@@ -83,15 +93,31 @@ PanelWindow {
         onTriggered: root.revealed = false
     }
 
-    // Other modules (the bar, the capture overlay) read this.
-    onRevealedChanged: ShellState.dockRevealed = revealed
+    // Other modules (the bar, the capture overlay) read this. It is one
+    // shared flag but there is one Dock per monitor, so only the instance on
+    // the currently-focused monitor is allowed to write it -- otherwise
+    // whichever instance last changed reveal state would stomp the others,
+    // and a reader would see an arbitrary monitor's value. This scopes the
+    // flag to mean "is the dock revealed on the monitor the user is on",
+    // which is what a capture overlay or the bar actually care about.
+    // (A true per-monitor flag would need ShellState.dockRevealed itself to
+    // become keyed by screen, which is out of scope here -- see the report.)
+    readonly property bool isFocusedMonitorInstance: root.monitor === null || root.monitor === Hyprland.focusedMonitor
+
+    onRevealedChanged: root._syncShellState()
+    onIsFocusedMonitorInstanceChanged: root._syncShellState()
+
+    function _syncShellState(): void {
+        if (root.isFocusedMonitorInstance)
+            ShellState.dockRevealed = root.revealed;
+    }
 
     // wantRevealed's first evaluation emits no change signal when it lands on
     // false (the default), so the initial state has to be taken explicitly —
     // otherwise a shell started on a busy workspace would leave the dock up.
     Component.onCompleted: {
         revealed = wantRevealed;
-        ShellState.dockRevealed = revealed;
+        root._syncShellState();
     }
 
     // ── Input region ────────────────────────────────────────────────────────