Fixed AI Studio installing a second copy of itself next to an existing installation (#922)

app/MindWork AI Studio/Tools/Rust/InstallationKind.cs

@@ -0,0 +1,31 @@
+namespace AIStudio.Tools.Rust;
+
+/// <summary>
+/// Tells whether this installation is able to update itself, and if not, why.
+/// </summary>
+public enum InstallationKind
+{
+    /// <summary>
+    /// An installation the current user owns and which AI Studio may update itself. This is also
+    /// the fallback when the runtime reports a kind we do not know yet.
+    /// </summary>
+    USER,
+
+    /// <summary>
+    /// An installation someone else deployed and maintains, for example, an IT department. Whoever
+    /// deployed it distributes new versions instead.
+    /// </summary>
+    MANAGED,
+
+    /// <summary>
+    /// An installation the current user owns, but which the updater cannot replace. Its owner has
+    /// to install a new version themselves.
+    /// </summary>
+    UNSUPPORTED_LOCATION,
+
+    /// <summary>
+    /// Not an installation at all, but a development build started from a build directory or an
+    /// IDE. There is nothing here the updater could replace.
+    /// </summary>
+    DEVELOPMENT,
+}

app/MindWork AI Studio/Tools/Rust/RuntimeInfoResponse.cs

@@ -1,3 +1,3 @@
 namespace AIStudio.Tools.Rust;
 
-public readonly record struct RuntimeInfoResponse(string WorkingDirectory, string ExecutablePath, string LinuxPackageType);
+public readonly record struct RuntimeInfoResponse(string WorkingDirectory, string ExecutablePath, string LinuxPackageType, InstallationKind InstallationKind);

app/MindWork AI Studio/Tools/Services/UpdatePolicy.cs

@@ -11,7 +11,18 @@ public sealed class UpdatePolicy(SettingsManager settingsManager, RuntimeInfoRes
         : runtimeInfo.LinuxPackageType switch
         {
             "flatpak" => UpdatePolicyMode.FLATPAK,
-            _ => UpdatePolicyMode.SELF_UPDATE
+            _ => runtimeInfo.InstallationKind switch
+            {
+                //
+                // The runtime already refuses to update these installations. We mirror its decision
+                // here so that the UI explains the situation instead of offering update actions that
+                // would silently do nothing:
+                //
+                InstallationKind.MANAGED => UpdatePolicyMode.MANAGED_INSTALLATION,
+                InstallationKind.UNSUPPORTED_LOCATION => UpdatePolicyMode.UNSUPPORTED_INSTALLATION_LOCATION,
+                InstallationKind.DEVELOPMENT => UpdatePolicyMode.DEVELOPMENT,
+                _ => UpdatePolicyMode.SELF_UPDATE
+            }
         };
 
     public bool AllowsManualChecks => this.CurrentMode is UpdatePolicyMode.SELF_UPDATE;

app/MindWork AI Studio/Tools/Services/UpdatePolicyMode.cs

@@ -4,5 +4,8 @@ public enum UpdatePolicyMode
 {
     SELF_UPDATE,
     FLATPAK,
-    ENTERPRISE_DISABLED
+    ENTERPRISE_DISABLED,
+    MANAGED_INSTALLATION,
+    UNSUPPORTED_INSTALLATION_LOCATION,
+    DEVELOPMENT,
 }