feat(site): implement dynamic site selection dropdown in sidebar and enable multi-site monitoring

eslint.config.mjs

@@ -12,6 +12,9 @@ const eslintConfig = defineConfig([
     "out/**",
     "build/**",
     "next-env.d.ts",
+    "backend/**",
+    "proxy/**",
+    "test/**",
   ]),
 ]);