⬇️(frontend) downgrade livekit-js-sdk to troubleshoot production issues

Temporarily roll back LiveKit client SDK version to investigate and
resolve production stability problems that emerged after recent upgrade,
enabling system restoration while root cause analysis is performed.

src/frontend/package-lock.json

@@ -26,7 +26,7 @@
         "i18next-parser": "9.3.0",
         "i18next-resources-to-backend": "1.2.1",
         "libphonenumber-js": "1.12.10",
-        "livekit-client": "2.15.5",
+        "livekit-client": "2.15.2",
         "posthog-js": "1.256.2",
         "react": "18.3.1",
         "react-aria-components": "1.10.1",
@@ -7460,9 +7460,9 @@
       }
     },
     "node_modules/livekit-client": {
-      "version": "2.15.5",
-      "resolved": "https://registry.npmjs.org/livekit-client/-/livekit-client-2.15.5.tgz",
-      "integrity": "sha512-zn36akmDlqZxlrTOUgYXtxtj35HQ44aJ+mgKat9BTSPiZru4RjEHOtp8RJE6jGoN2miJlWiOeEKHB2+ae3YrSw==",
+      "version": "2.15.2",
+      "resolved": "https://registry.npmjs.org/livekit-client/-/livekit-client-2.15.2.tgz",
+      "integrity": "sha512-hf0A0JFN7M0iVGZxMfTk6a3cW7TNTVdqxkykjKBweORlqhQX1ITVloh6aLvplLZOxpkUE5ZVLz1DeS3+ERglog==",
       "license": "Apache-2.0",
       "dependencies": {
         "@livekit/mutex": "1.1.1",

src/frontend/package.json

@@ -31,7 +31,7 @@
     "i18next-parser": "9.3.0",
     "i18next-resources-to-backend": "1.2.1",
     "libphonenumber-js": "1.12.10",
-    "livekit-client": "2.15.5",
+    "livekit-client": "2.15.2",
     "posthog-js": "1.256.2",
     "react": "18.3.1",
     "react-aria-components": "1.10.1",