refactor: simplify browser-echo initialization in router

- Removed the VITE_BROWSER_ECHO_ENABLED variable from environment configuration.
- Updated the condition for enabling browser-echo to only check for the development environment, streamlining the initialization process.

Author: regenrek

infra/ansible/group_vars/constructa/vars.example.yml

@@ -97,6 +97,3 @@ constructa_env:
   POLAR_PRODUCT_BUSINESS_MONTHLY: ''
   POLAR_PRODUCT_CREDITS_50: ''
   POLAR_PRODUCT_CREDITS_100: ''
-
-  # Frontend logging helpers
-  VITE_BROWSER_ECHO_ENABLED: 'false'

src/router.tsx

@@ -6,10 +6,7 @@ import { NotFound } from './components/NotFound';
 import { routeTree } from './routeTree.gen';
 
 // Initialize browser-echo for TanStack Start (manual import required)
-const enableBrowserEcho =
-  import.meta.env.DEV || import.meta.env.VITE_BROWSER_ECHO_ENABLED === 'true';
-
-if (enableBrowserEcho && typeof window !== 'undefined') {
+if (import.meta.env.DEV && typeof window !== 'undefined') {
   void import('virtual:browser-echo');
 }