Polish editors, previews, persistence and docs

Cross-platform refinements to appearance/battery/charger editors, tabs
and navigation, plus persistence, screenshot previews and CLAUDE.md docs.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Cable/Chargers/ChargerConfiguration.swift

@@ -12,6 +12,8 @@ struct ChargerConfiguration: Identifiable, Hashable {
     var colorName: String
     var system: ElectricalSystem
     var powerSourceType: SavedCharger.PowerSourceType
+    var componentID: String?
+    var remoteIconURLString: String?
 
     init(
         id: UUID = UUID(),
@@ -23,7 +25,9 @@ struct ChargerConfiguration: Identifiable, Hashable {
         iconName: String = "bolt.fill",
         colorName: String = "orange",
         system: ElectricalSystem,
-        powerSourceType: SavedCharger.PowerSourceType = .shore
+        powerSourceType: SavedCharger.PowerSourceType = .shore,
+        componentID: String? = nil,
+        remoteIconURLString: String? = nil
     ) {
         self.id = id
         self.name = name
@@ -35,6 +39,8 @@ struct ChargerConfiguration: Identifiable, Hashable {
         self.colorName = colorName
         self.system = system
         self.powerSourceType = powerSourceType
+        self.componentID = componentID
+        self.remoteIconURLString = remoteIconURLString
     }
 
     init(savedCharger: SavedCharger, system: ElectricalSystem) {
@@ -48,6 +54,8 @@ struct ChargerConfiguration: Identifiable, Hashable {
         self.colorName = savedCharger.colorName
         self.system = system
         self.powerSourceType = savedCharger.sourceType
+        self.componentID = savedCharger.componentID
+        self.remoteIconURLString = savedCharger.remoteIconURLString
     }
 
     var effectivePowerWatts: Double {
@@ -67,6 +75,8 @@ struct ChargerConfiguration: Identifiable, Hashable {
         savedCharger.colorName = colorName
         savedCharger.system = system
         savedCharger.powerSourceType = powerSourceType.rawValue
+        savedCharger.componentID = componentID
+        savedCharger.remoteIconURLString = remoteIconURLString
         savedCharger.timestamp = Date()
     }
 }