Consolidate omarchy-shell colors into a single shell.toml surface

Five plugins each owned their own colors.toml watcher with subtly
different parsers, plus two ad-hoc per-theme override files
(notifications.json, image-picker-colors.json). This collapses all of
that into one source of truth: Commons/Color.qml watches colors.toml +
shell.toml and exposes Color.bar.*, Color.popups.*, Color.notifications.*,
Color.menu.*, Color.imagePicker.* for every surface to bind to.

shell.toml is generated by the existing template pipeline from
default/themed/shell.toml.tpl. Themes can ship their own shell.toml to
override individual keys; everything missing falls back to the
foundational palette via root.pick(). Settings panel is intentionally
not themable beyond the foundational tokens.

last-horizon and solitude ship a minimal shell.toml to preserve their
historical 'notification border matches Hyprland active border'
behavior, which previously came from parsing the theme's hyprland.conf
(now removed).

default/quickshell/omarchy-shell/plugins/bar/Bar.qml

@@ -9,6 +9,7 @@ import Quickshell.Wayland
 import Quickshell.Widgets
 import QtQuick
 import QtQuick.Layouts
+import qs.Commons
 import "common" as BarCommon
 
 Item {
@@ -49,9 +50,11 @@ Item {
   // "monospace" resolves through fontconfig at paint time, so changing the
   // system font (via `omarchy-font-set`) updates the bar without a reload.
   property string fontFamily: "monospace"
-  property color foreground: "#cacccc"
-  property color background: "#101315"
-  property color urgent: "#a55555"
+  // Bound to the central Color singleton so the bar tracks shell.toml's
+  // [bar] section. Property names kept for the rest of this file's bindings.
+  property color foreground: Color.bar.text
+  property color background: Color.bar.background
+  property color urgent: Color.bar.active
   property string weatherText: ""
   property string weatherClass: ""
   property bool updateAvailable: false
@@ -438,18 +441,6 @@ Item {
     }
   }
 
-  function loadTheme(raw) {
-    var lines = String(raw || "").split("\n")
-    for (var i = 0; i < lines.length; i++) {
-      var match = lines[i].match(/^\s*([A-Za-z0-9_-]+)\s*=\s*["']?(#[0-9A-Fa-f]{6})/)
-      if (!match) continue
-
-      if (match[1] === "foreground") foreground = match[2]
-      else if (match[1] === "background") background = match[2]
-      else if (match[1] === "red") urgent = match[2]
-    }
-  }
-
   function updateWeather(raw) {
     var data = parseModuleJson(raw)
     weatherText = data.text || ""
@@ -723,26 +714,6 @@ Item {
     onTriggered: root.tooltipShown = true
   }
 
-  // The host owns shell.json loading and injects `barConfig`. Bar still keeps
-  // its own theme FileView since theme colors are independent of shell.json.
-  // `omarchy-theme-set` recreates the entire theme/ directory via rm+mv, which
-  // invalidates the inotify watch on colors.toml. Use theme.name (overwritten
-  // in place) to force a fresh reload after each swap.
-  FileView {
-    id: themeColorsFile
-    path: root.home + "/.config/omarchy/current/theme/colors.toml"
-    watchChanges: true
-    printErrors: false
-    onLoaded: root.loadTheme(text())
-    onFileChanged: reload()
-  }
-  FileView {
-    path: root.home + "/.config/omarchy/current/theme.name"
-    watchChanges: true
-    printErrors: false
-    onFileChanged: themeColorsFile.reload()
-  }
-
   // Presence of the `bar-off` flag = bar hidden. Watching the parent toggles
   // directory because FileView can't observe a file that doesn't exist yet,
   // and the flag is created/removed by `omarchy-toggle-bar`.

default/quickshell/omarchy-shell/plugins/bar/common/PopupCard.qml

@@ -1,6 +1,7 @@
 import QtQuick
 import Quickshell
 import Quickshell.Hyprland
+import qs.Commons
 
 PopupWindow {
   id: root
@@ -89,8 +90,8 @@ PopupWindow {
   Rectangle {
     id: card
     anchors.fill: parent
-    color: root.bar ? root.bar.background : "#101315"
-    border.color: root.bar ? root.bar.foreground : "#cacccc"
+    color: Color.popups.background
+    border.color: Color.popups.border
     border.width: 1
     radius: 0
     opacity: root.open ? 1.0 : 0