Prepare release 0.0.1: install script (uninstall/purge, service, validation), README (how to use, config), UI and effective config updates

src/DnsmasqWebUI/Models/EffectiveConfig/EffectiveConfigDisplayMode.cs

@@ -0,0 +1,14 @@
+namespace DnsmasqWebUI.Models.EffectiveConfig;
+
+/// <summary>
+/// Display mode for effective-config fields. Cascaded from the parent so that
+/// OptionItem, MultiValueRow, and custom value displays can render view vs edit appropriately.
+/// </summary>
+public enum EffectiveConfigDisplayMode
+{
+    /// <summary>Show values as read-only text.</summary>
+    View,
+
+    /// <summary>Show editable controls (inputs, toggles). Not yet implemented; plumbing only.</summary>
+    Edit,
+}