Renderer: align NitroConfig Window decl with client + fix glob .default access

Two tsgo nits that propagate to the client when the renderer is linked
in:

- packages/utils/src/NitroConfig.ts declared
  'NitroConfig?: { [index: string]: any }' on Window, but Nitro-V3
  declares 'NitroConfig?: Record<string, unknown>' in its
  react-app-env.d.ts. The two declaration-merging fragments must
  match — switching the renderer side to Record<string, unknown>
  unifies them.
- packages/assets/src/AssetManager.ts: 'import.meta.glob(...)' is
  augmented as Record<string, string> in the client's typedef, so
  'mod.default ?? mod' (defensive handling of either string or
  { default: string }) failed because mod is typed string. Cast
  inline: '((mod as { default?: string }).default ?? mod)'.

Renderer tsgo error count: 3 -> 0.

packages/assets/src/AssetManager.ts

@@ -227,7 +227,7 @@ export class AssetManager implements IAssetManager
         for(const path in merged)
         {
             const mod = merged[path];
-            const imageUrl = (mod.default ?? mod) as string;
+            const imageUrl = ((mod as { default?: string }).default ?? mod) as string;
 
             const file = path.split('/').pop()!;
             const rawName = file.replace(/\.png$/i, '');
@@ -296,7 +296,7 @@ export class AssetManager implements IAssetManager
             if(!path.startsWith(prefix)) continue;
 
             const mod = allImages[path];
-            const imageUrl = (mod.default ?? mod) as string;
+            const imageUrl = ((mod as { default?: string }).default ?? mod) as string;
 
             const file = path.split('/').pop()!;
             const rawName = file.replace(/\.png$/i, '');

packages/utils/src/NitroConfig.ts

@@ -4,6 +4,6 @@ declare global
 {
     interface Window
     {
-		NitroConfig?: { [index: string]: any };
+        NitroConfig?: Record<string, unknown>;
     }
 }