➕(frontend) add posthog dependency

Posthog is a product analysis tool.
Installed the js SDK to track product usage.

src/frontend/package-lock.json

@@ -20,6 +20,7 @@
         "i18next-parser": "9.0.2",
         "i18next-resources-to-backend": "1.2.1",
         "livekit-client": "2.5.1",
+        "posthog-js": "1.161.5",
         "react": "18.3.1",
         "react-aria-components": "1.3.3",
         "react-dom": "18.3.1",
@@ -406,7 +407,6 @@
     },
     "node_modules/@clack/prompts/node_modules/is-unicode-supported": {
       "version": "1.3.0",
-      "dev": true,
       "inBundle": true,
       "license": "MIT",
       "engines": {
@@ -5551,6 +5551,11 @@
         "reusify": "^1.0.4"
       }
     },
+    "node_modules/fflate": {
+      "version": "0.4.8",
+      "resolved": "https://registry.npmjs.org/fflate/-/fflate-0.4.8.tgz",
+      "integrity": "sha512-FJqqoDBR00Mdj9ppamLa/Y7vxm+PRmNWA67N846RvsoYVMKB4q3y/de5PA7gUmRMYK/8CMz2GDZQmCRN1wBcWA=="
+    },
     "node_modules/file-entry-cache": {
       "version": "6.0.1",
       "resolved": "https://registry.npmjs.org/file-entry-cache/-/file-entry-cache-6.0.1.tgz",
@@ -8246,6 +8251,25 @@
       "integrity": "sha512-1NNCs6uurfkVbeXG4S8JFT9t19m45ICnif8zWLd5oPSZ50QnwMfK+H3jv408d4jw/7Bttv5axS5IiHoLaVNHeQ==",
       "dev": true
     },
+    "node_modules/posthog-js": {
+      "version": "1.161.5",
+      "resolved": "https://registry.npmjs.org/posthog-js/-/posthog-js-1.161.5.tgz",
+      "integrity": "sha512-KGkb12grSQvGRauH6z+AUB83c4dgWqzmJFDjyMXarWRafaLN80HzjN1jk806x27HvdDXi21jtwiXekioWzEQ9g==",
+      "dependencies": {
+        "fflate": "^0.4.8",
+        "preact": "^10.19.3",
+        "web-vitals": "^4.0.1"
+      }
+    },
+    "node_modules/preact": {
+      "version": "10.24.0",
+      "resolved": "https://registry.npmjs.org/preact/-/preact-10.24.0.tgz",
+      "integrity": "sha512-aK8Cf+jkfyuZ0ZZRG9FbYqwmEiGQ4y/PUO4SuTWoyWL244nZZh7bd5h2APd4rSNDYTBNghg1L+5iJN3Skxtbsw==",
+      "funding": {
+        "type": "opencollective",
+        "url": "https://opencollective.com/preact"
+      }
+    },
     "node_modules/prelude-ls": {
       "version": "1.2.1",
       "resolved": "https://registry.npmjs.org/prelude-ls/-/prelude-ls-1.2.1.tgz",
@@ -10096,6 +10120,11 @@
         "node": "*"
       }
     },
+    "node_modules/web-vitals": {
+      "version": "4.2.3",
+      "resolved": "https://registry.npmjs.org/web-vitals/-/web-vitals-4.2.3.tgz",
+      "integrity": "sha512-/CFAm1mNxSmOj6i0Co+iGFJ58OS4NRGVP+AWS/l509uIK5a1bSoIVaHz/ZumpHTfHSZBpgrJ+wjfpAOrTHok5Q=="
+    },
     "node_modules/webrtc-adapter": {
       "version": "9.0.1",
       "resolved": "https://registry.npmjs.org/webrtc-adapter/-/webrtc-adapter-9.0.1.tgz",

src/frontend/package.json

@@ -25,6 +25,7 @@
     "i18next-parser": "9.0.2",
     "i18next-resources-to-backend": "1.2.1",
     "livekit-client": "2.5.1",
+    "posthog-js": "1.161.5",
     "react": "18.3.1",
     "react-aria-components": "1.3.3",
     "react-dom": "18.3.1",