feat(editor): Export Content Pack button in File menu

- File > Export Content Pack (.wcp) saves zone + packs into WCP archive
- Auto-saves zone first, then bundles into the novel WCP format
- WCP is a custom format unique to wowee (not MPQ, not CASC)
- Output: output/MapName.wcp ready for distribution
- Toast notification on success/failure

tools/editor/editor_app.cpp

@@ -1,6 +1,7 @@
 #include "editor_app.hpp"
 #include "adt_writer.hpp"
 #include "zone_manifest.hpp"
+#include "content_pack.hpp"
 #include "core/coordinates.hpp"
 #include "rendering/vk_context.hpp"
 #include "pipeline/adt_loader.hpp"
@@ -762,6 +763,23 @@ void EditorApp::exportZone(const std::string& outputDir) {
     LOG_INFO("Zone exported to: ", base);
 }
 
+void EditorApp::exportContentPack(const std::string& destPath) {
+    if (!terrain_.isLoaded()) return;
+    // Save zone first
+    std::string dir = lastSavePath_.empty() ? "output" : lastSavePath_;
+    exportZone(dir);
+    // Pack into WCP
+    ContentPackInfo info;
+    info.name = loadedMap_;
+    info.author = "Kelsi Davis";
+    info.description = "Custom zone created with Wowee World Editor";
+    info.mapId = 9000;
+    if (ContentPacker::packZone(dir, loadedMap_, destPath, info))
+        showToast("Content pack exported: " + destPath);
+    else
+        showToast("Failed to create content pack");
+}
+
 void EditorApp::quickSave() {
     if (!terrain_.isLoaded()) return;
     std::string dir = lastSavePath_.empty() ? "output" : lastSavePath_;

tools/editor/editor_app.hpp

@@ -36,6 +36,7 @@ public:
     void saveWDT(const std::string& path);
     void exportZone(const std::string& outputDir);
     void quickSave();
+    void exportContentPack(const std::string& destPath);
 
     void requestQuit();
     void resetCamera();

tools/editor/editor_ui.cpp

@@ -158,6 +158,10 @@ void EditorUI::renderMenuBar(EditorApp& app) {
                 app.quickSave();
             if (ImGui::MenuItem("Export Zone...", nullptr, false, app.hasTerrainLoaded()))
                 showSaveDialog_ = true;
+            if (ImGui::MenuItem("Export Content Pack (.wcp)", nullptr, false, app.hasTerrainLoaded())) {
+                std::string wcpPath = "output/" + app.getLoadedMap() + ".wcp";
+                app.exportContentPack(wcpPath);
+            }
             if (ImGui::BeginMenu("Add Adjacent Tile", app.hasTerrainLoaded())) {
                 if (ImGui::MenuItem("North (+X)")) app.addAdjacentTile(1, 0);
                 if (ImGui::MenuItem("South (-X)")) app.addAdjacentTile(-1, 0);