feat(editor): fly-to-object, export README, quality of life

- "Fly To" button on selected objects and NPCs: moves camera 30 units
  above the selected item for quick navigation on large zones
- Export now generates README.txt with zone summary: map name, tile
  coords, object/NPC counts, and file listing
- Complete export package: zone.json + WDT + ADT + objects.json +
  creatures.json + README.txt

tools/editor/editor_app.cpp

@@ -603,6 +603,24 @@ void EditorApp::exportZone(const std::string& outputDir) {
         objectPlacer_.saveToFile(objPath);
     }
 
+    // Write zone info README
+    {
+        std::ofstream readme(base + "/README.txt");
+        if (readme) {
+            readme << "Zone: " << loadedMap_ << "\n";
+            readme << "Tile: [" << loadedTileX_ << ", " << loadedTileY_ << "]\n";
+            readme << "Objects: " << objectPlacer_.objectCount() << "\n";
+            readme << "NPCs: " << npcSpawner_.spawnCount() << "\n";
+            readme << "Created with Wowee World Editor\n\n";
+            readme << "Files:\n";
+            readme << "  zone.json       - Zone manifest (for client)\n";
+            readme << "  " << loadedMap_ << ".wdt   - Map definition\n";
+            readme << "  " << loadedMap_ << "_" << loadedTileX_ << "_" << loadedTileY_ << ".adt - Terrain tile\n";
+            if (objectPlacer_.objectCount() > 0) readme << "  objects.json    - Placed M2/WMO objects\n";
+            if (npcSpawner_.spawnCount() > 0) readme << "  creatures.json  - NPC/monster spawns\n";
+        }
+    }
+
     // Write zone manifest (for client loading)
     ZoneManifest manifest;
     manifest.mapName = loadedMap_;
@@ -696,6 +714,18 @@ void EditorApp::addAdjacentTile(int offsetX, int offsetY) {
                      std::to_string(newX) + "_" + std::to_string(newY) + ".adt");
 }
 
+void EditorApp::flyToSelected() {
+    auto* sel = objectPlacer_.getSelected();
+    if (sel) {
+        camera_.setPosition(sel->position + glm::vec3(0, 0, 30));
+        return;
+    }
+    auto* npc = npcSpawner_.getSelected();
+    if (npc) {
+        camera_.setPosition(npc->position + glm::vec3(0, 0, 30));
+    }
+}
+
 void EditorApp::snapSelectedToGround() {
     auto* sel = objectPlacer_.getSelected();
     if (!sel || !terrain_.isLoaded()) return;

tools/editor/editor_app.hpp

@@ -72,6 +72,7 @@ public:
     void setGizmoAxis(TransformAxis axis);
     void setSkyPreset(int preset); // 0=day, 1=dusk, 2=night
     void snapSelectedToGround();
+    void flyToSelected();
 
     // Multi-tile support
     void addAdjacentTile(int offsetX, int offsetY);

tools/editor/editor_ui.cpp

@@ -560,10 +560,13 @@ void EditorUI::renderObjectPanel(EditorApp& app) {
 
             if (changed) app.markObjectsDirty();
 
-            if (ImGui::Button("Snap Ground", ImVec2(100, 0)))
+            if (ImGui::Button("Snap Ground", ImVec2(75, 0)))
                 app.snapSelectedToGround();
             ImGui::SameLine();
-            if (ImGui::Button("Delete", ImVec2(100, 0))) placer.deleteSelected();
+            if (ImGui::Button("Fly To", ImVec2(55, 0)))
+                app.flyToSelected();
+            ImGui::SameLine();
+            if (ImGui::Button("Delete", ImVec2(55, 0))) placer.deleteSelected();
             if (ImGui::Button("Duplicate", ImVec2(100, 0))) {
                 std::string dupPath = sel->path;
                 glm::vec3 dupPos = sel->position + glm::vec3(10.0f, 10.0f, 0.0f);
@@ -800,6 +803,9 @@ void EditorUI::renderNpcPanel(EditorApp& app) {
             }
 
             ImGui::Separator();
+            if (ImGui::Button("Fly To##npc", ImVec2(55, 0)))
+                app.flyToSelected();
+            ImGui::SameLine();
             if (ImGui::Button("Duplicate##npc", ImVec2(80, 0))) {
                 CreatureSpawn copy = *sel;
                 copy.position += glm::vec3(10, 10, 0);