Add in-editor Slate setup wizard (Tools > MCP Setup Wizard)

Native UE editor tab (SMCPWizard) so setup happens inside Unreal, not just the
Node CLI. Three sections:
- Remote Control: live status of the :30010 bridge + a button to start it
  (WebControl.StartServer + EnableServerOnStartup).
- API keys: paste/save the agent-gateway Anthropic token (auth.env) and
  ElevenLabs key (integrations.json) — both git-ignored.
- MCP tools: lists the catalogue from tools.json.

Wiring:
- UEBlueprintMCPEditor module registers a nomad tab + a Tools-menu entry.
- Build.cs gains the Projects module (IPluginManager).
- server.js exports TOOLS and only launches the stdio server when run directly
  (isMain), so src/dumpTools.mjs can generate tools.json. `npm run dump-tools`.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Source/UEBlueprintMCPEditor/Private/SMCPWizard.h

@@ -0,0 +1,49 @@
+#pragma once
+
+#include "CoreMinimal.h"
+#include "Widgets/SCompoundWidget.h"
+#include "Styling/SlateColor.h"
+
+class SEditableTextBox;
+
+/**
+ * In-editor setup wizard for the UE Blueprint MCP plugin. A Nomad tab opened from
+ * Tools > MCP Setup Wizard. Three sections:
+ *   1. Remote Control — show status of the HTTP bridge (:30010) and start it.
+ *   2. API keys       — paste the agent-gateway Anthropic token + ElevenLabs key.
+ *   3. MCP tools      — list the tool catalogue (read from the plugin's tools.json).
+ */
+class SMCPWizard : public SCompoundWidget
+{
+public:
+    SLATE_BEGIN_ARGS(SMCPWizard) {}
+    SLATE_END_ARGS()
+
+    void Construct(const FArguments& InArgs);
+
+private:
+    // --- Remote Control ---
+    enum class ERCStatus : uint8 { Unknown, Checking, Up, Down };
+    ERCStatus RcStatus = ERCStatus::Unknown;
+    FText GetRcStatusText() const;
+    FSlateColor GetRcStatusColor() const;
+    FReply OnStartRemoteControl();
+    FReply OnRefreshStatus();
+    void PingRemoteControl();
+
+    // --- API keys ---
+    TSharedPtr<SEditableTextBox> AnthropicBox;
+    TSharedPtr<SEditableTextBox> ElevenLabsBox;
+    FReply OnSaveAnthropicToken();
+    FReply OnSaveElevenLabsKey();
+    void LoadExistingKeys();
+
+    // --- Tools ---
+    TSharedRef<SWidget> BuildToolsSection();
+
+    // --- helpers ---
+    FString PluginDir() const;
+    FString GatewayDir() const;
+    static void Notify(const FText& Message, bool bSuccess);
+    static bool UpsertEnvVar(const FString& FilePath, const FString& Key, const FString& Value);
+};