refactor(Logs): use APP_TARGET to read target websocket addr

refactor(config): use APP_TARGET constant for backend URL configuration

Centralize backend URL configuration by introducing APP_TARGET constant in vite.config.js and using it for both WebSocket connection and API proxy. This improves maintainability by having a single source of truth for the backend address.

vite.config.js

@@ -1,14 +1,19 @@
 import { defineConfig } from 'vite'
 import vue from '@vitejs/plugin-vue'
 
+const APP_TARGET = '192.168.1.4:38080'
+
 export default defineConfig({
+    define: {
+        __APP_TARGET__: JSON.stringify(APP_TARGET)
+    },
     plugins: [vue()],
     server: {
         host: '0.0.0.0',
         port: 3000,
         proxy: {
             '/api': {
-                target: 'http://192.168.1.4:38080',
+                target: `http://${APP_TARGET}`,
                 changeOrigin: true,
                 rewrite: (path) => path.replace(/^\/api/, '')
             }