Fix inspector 'i' key registration in KeyboardInput

Problem:
- main.ts registered inspector with window.addEventListener
- keyboardInput.ts used document.onkeydown which replaces event handler
- This caused the inspector key binding to be overridden

Solution:
- Moved inspector 'i' key handling into KeyboardInput class
- Removed duplicate setupInspector() method from main.ts
- Inspector now opens correctly when 'i' is pressed

Changes:
- src/keyboardInput.ts: Added 'i' key case to open Babylon Inspector
- src/main.ts: Removed setupInspector() method (no longer needed)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

src/keyboardInput.ts

@@ -62,6 +62,15 @@ export class KeyboardInput {
 
         document.onkeydown = (ev) => {
             switch (ev.key) {
+                case 'i':
+                    // Open Babylon Inspector
+                    import("@babylonjs/inspector").then((inspector) => {
+                        inspector.Inspector.Show(this._scene, {
+                            overlay: true,
+                            showExplorer: true,
+                        });
+                    });
+                    break;
                 case '1':
                     this._onCameraChangeObservable.notifyObservers(1);
                     break;

src/main.ts

@@ -256,7 +256,6 @@ export class Main {
         this._audioEngine = await CreateAudioEngineAsync();
 
 
-        this.setupInspector();
         window.setTimeout(()=>{
             if (!this._started) {
                 this._started = true;
@@ -286,20 +285,6 @@ export class Main {
 
         DefaultScene.MainScene.collisionsEnabled = true;
     }
-
-    private setupInspector() {
-        setLoadingMessage("Initializing Inspector...");
-        window.addEventListener("keydown", (ev) => {
-            if (ev.key == 'i') {
-                import ("@babylonjs/inspector").then((inspector) => {
-                    inspector.Inspector.Show(DefaultScene.MainScene, {
-                        overlay: true,
-                        showExplorer: true
-                    });
-                });
-            }
-        });
-    }
 }
 
 // Setup router