Finish threading the accent colour through the whole desktop

The recent accent-colour setting only reached part of the desktop.
looks.lua still hardcoded the focused-window border and glow to blue,
so any hyprctl reload -- or every fresh session, for about a second --
reverted a chosen accent; it now reads accentName the same way it
already read colorScheme. The lock screen and terminal stayed blue
regardless of the chosen accent despite the setting's own description
claiming otherwise; panama-lock and panama-theme-apps now resolve and
apply the real accent.

AccentPicker built its swatch model from Theme.accents directly
instead of the schema's own options list, so the two could drift
silently; switched it to read the schema. Its hit target only covered
the swatch, not the name label added specifically for colour-vision
accessibility -- extended to the whole row. Settings search had no
route for the "appearance" group, so searching for the accent or
colour scheme landed on Home.

ColorScheme's hex-to-Hyprland helper assumed 6-digit colours and would
silently corrupt a future translucent one; fixed it to read from the
end of the string instead of the start. An accent-only change no
longer reruns the full colour-scheme pipeline. The gradient it builds
for the focused border now goes through SystemSettings' existing
serialiser instead of a second, under-escaped copy of the same logic.

The settings-ownership contract test enforced the old rule that
ColorScheme must never touch the focused border; updated it to verify
the real, intended rule instead of contradicting the code.

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

config/dot/quickshell/modules/settings/AccentPicker.qml

@@ -20,23 +20,45 @@ Flow {
 
     readonly property string current: DesktopPreferences.get("accentName") || "blue"
 
+    // The schema's own option list, not Theme.accents directly -- two lists
+    // hand-kept in sync is how they drift. This is the same pattern
+    // ChoiceRow.qml uses for every other enum row.
+    readonly property var spec: PreferenceSchema.spec("accentName")
+    readonly property var options: root.spec && root.spec.options ? root.spec.options : []
+
     Repeater {
-        // Object key order is insertion order here, so the palette's own order
-        // is what the user sees; blue first because it is what Panama ships.
-        model: Object.keys(Theme.accents)
+        // The schema's option order is the palette's order, so blue is first
+        // because it is what Panama ships.
+        model: root.options
 
         Column {
             id: entry
 
             required property var modelData
 
-            readonly property var pair: Theme.accents[entry.modelData]
-            readonly property bool selected: entry.modelData === root.current
+            readonly property string name: entry.modelData.value
+            readonly property var pair: Theme.accents[entry.name]
+            readonly property bool selected: entry.name === root.current
             readonly property color start: Theme.dark ? entry.pair.dark : entry.pair.light
             readonly property color end: Theme.dark ? entry.pair.darkSecondary : entry.pair.lightSecondary
 
             spacing: 5
 
+            // The hit target is the whole swatch+label unit, not just the
+            // 46px circle: the label exists specifically so someone with a
+            // colour vision deficiency can identify an accent without it, and
+            // a label that cannot itself be tapped defeats that.
+            HoverHandler {
+                cursorShape: Qt.PointingHandCursor
+            }
+
+            TapHandler {
+                onTapped: {
+                    if (!SystemSettings.commitPreference("accentName", entry.name))
+                        console.warn("AccentPicker: commitPreference rejected accent", entry.name);
+                }
+            }
+
             Rectangle {
                 width: 46
                 height: 46
@@ -59,12 +81,6 @@ Flow {
                         GradientStop { position: 1.0; color: entry.end }
                     }
                 }
-
-                MouseArea {
-                    anchors.fill: parent
-                    cursorShape: Qt.PointingHandCursor
-                    onClicked: SystemSettings.commitPreference("accentName", entry.modelData)
-                }
             }
 
             // Always shown, not a tooltip. Telling swatches apart by colour is
@@ -73,7 +89,7 @@ Flow {
             // hiding the names behind a hover would waste that.
             Text {
                 anchors.horizontalCenter: parent.horizontalCenter
-                text: entry.pair.label
+                text: entry.modelData.label
                 color: entry.selected ? Theme.fg : Theme.fgMuted
                 font.family: Theme.fontFamily
                 font.pixelSize: Theme.fontSizeSmall