fix(templates/multienv): Disable useDefineForClassFields in multienv TypeScript configs to ensure decorator compatibility

assets/templates/multienv/bunfig.toml

@@ -10,4 +10,5 @@ preload = []
 # Enable decorators for Bun's TypeScript transpiler
 # This ensures user code with decorators works when executed via Bun
 [transpiler]
+useDefineForClassFields = false,
 experimentalDecorators = true

assets/templates/multienv/deno.json

@@ -1,6 +1,7 @@
 {
   "compilerOptions": {
     "experimentalDecorators": true,
+    "useDefineForClassFields": false,
     "lib": ["ES2022", "DOM"],
     "target": "ES2022",
     "checkJs": true