diff --git a/package-lock.json b/package-lock.json
index acaaf47..83726ef 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -48,6 +48,7 @@
         "lowlight": "^3.3.0",
         "lucide-react": "^0.577.0",
         "marked": "^17.0.6",
+        "posthog-js": "^1.250.0",
         "prosemirror-search": "^1.1.0",
         "react": "^19.2.0",
         "react-dom": "^19.2.0",
@@ -1574,6 +1575,31 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/@posthog/browser-common": {
+      "version": "0.7.2",
+      "resolved": "https://registry.npmjs.org/@posthog/browser-common/-/browser-common-0.7.2.tgz",
+      "integrity": "sha512-ukDmETXy6fTBE4ZpaO8ccscrNz5SvTaUnhQ0Ze2JX/oYILa89rrNwqUH7lDAuhFKa+NY6EoJ9kZMuOvuu4WwLQ==",
+      "license": "MIT",
+      "dependencies": {
+        "@posthog/core": "^1.50.4",
+        "@posthog/types": "^1.408.1"
+      }
+    },
+    "node_modules/@posthog/core": {
+      "version": "1.50.5",
+      "resolved": "https://registry.npmjs.org/@posthog/core/-/core-1.50.5.tgz",
+      "integrity": "sha512-afEchuShDaVIoxAIj76kDZQ1DhfesDmgfVp+mtTzsA3wlc8DF5uoz8YjuTjnxOicWkpP5HCDqYidK/1kT125Cg==",
+      "license": "MIT",
+      "dependencies": {
+        "@posthog/types": "^1.409.0"
+      }
+    },
+    "node_modules/@posthog/types": {
+      "version": "1.409.0",
+      "resolved": "https://registry.npmjs.org/@posthog/types/-/types-1.409.0.tgz",
+      "integrity": "sha512-239umoaZVb2GBaXeEyJpwFvjhrrChJH8NHCwiao23EBSu3NA6EN0MTMoaHSmMEf4yjiXEFFoYJA6FjJAXF5HGA==",
+      "license": "MIT"
+    },
     "node_modules/@radix-ui/primitive": {
       "version": "1.1.3",
       "resolved": "https://registry.npmjs.org/@radix-ui/primitive/-/primitive-1.1.3.tgz",
@@ -4067,8 +4093,7 @@
       "resolved": "https://registry.npmjs.org/@types/trusted-types/-/trusted-types-2.0.7.tgz",
       "integrity": "sha512-ScaPdn1dQczgbl0QFTeTOmVHFULt394XJgOQNoyVhZ6r2vLnMLJfBPd53SB52T/3G36VI1/g2MZaX0cwDuXsfw==",
       "license": "MIT",
-      "optional": true,
-      "peer": true
+      "optional": true
     },
     "node_modules/@types/unist": {
       "version": "3.0.3",
@@ -5066,6 +5091,20 @@
         "url": "https://opencollective.com/express"
       }
     },
+    "node_modules/core-js": {
+      "version": "3.50.0",
+      "resolved": "https://registry.npmjs.org/core-js/-/core-js-3.50.0.tgz",
+      "integrity": "sha512-BRWgOLKkFeCgRudR6zrs8p9XJZcE14grzKMMssoYrk6krtuEZ7MTKPIY5RzOnqsEKIR9kst7wNzphttraT+Yqw==",
+      "hasInstallScript": true,
+      "license": "MIT",
+      "engines": {
+        "node": "*"
+      },
+      "funding": {
+        "type": "opencollective",
+        "url": "https://opencollective.com/core-js"
+      }
+    },
     "node_modules/crelt": {
       "version": "1.0.6",
       "resolved": "https://registry.npmjs.org/crelt/-/crelt-1.0.6.tgz",
@@ -8202,6 +8241,69 @@
         "node": "^10 || ^12 || >=14"
       }
     },
+    "node_modules/posthog-js": {
+      "version": "1.427.2",
+      "resolved": "https://registry.npmjs.org/posthog-js/-/posthog-js-1.427.2.tgz",
+      "integrity": "sha512-/jRg3ChHuxcHTTJ/xb+IbpXLYxiBKIWdjrsNNqY1tAwjnFoijmz58i4mIR4A2P5MWx+4R7LlpK9vQfBr8v292g==",
+      "license": "(Apache-2.0 AND MIT)",
+      "dependencies": {
+        "@posthog/browser-common": "^0.7.2",
+        "@posthog/core": "^1.50.5",
+        "@posthog/types": "^1.409.0",
+        "core-js": "^3.49.0",
+        "dompurify": "^3.4.13",
+        "fflate": "^0.4.8",
+        "preact": "^10.29.3",
+        "query-selector-shadow-dom": "^1.0.1",
+        "web-vitals": "^6.2.1",
+        "web-vitals-soft-navs": "npm:web-vitals@6.2.1"
+      },
+      "peerDependencies": {
+        "@types/react": ">=16.8.0",
+        "react": ">=16.8.0"
+      },
+      "peerDependenciesMeta": {
+        "@types/react": {
+          "optional": true
+        },
+        "react": {
+          "optional": true
+        }
+      }
+    },
+    "node_modules/posthog-js/node_modules/dompurify": {
+      "version": "3.4.14",
+      "resolved": "https://registry.npmjs.org/dompurify/-/dompurify-3.4.14.tgz",
+      "integrity": "sha512-dVoH9z+MY+C9IilgGCk3YfFqjLi3fChm2OiKJMzh6axrJ5qwxqWaZamgmHrpv22CN/KdbZJuGEGgfQoL00LTdg==",
+      "license": "(MPL-2.0 OR Apache-2.0)",
+      "optionalDependencies": {
+        "@types/trusted-types": "^2.0.7"
+      }
+    },
+    "node_modules/posthog-js/node_modules/fflate": {
+      "version": "0.4.9",
+      "resolved": "https://registry.npmjs.org/fflate/-/fflate-0.4.9.tgz",
+      "integrity": "sha512-zdxgIEddhfsyCaWpJ2SdXEP8ZMrKJ6+5jl4OupODcywU0IhRk6gdXuVGcPICyfx2H97hVK7xmJtRLPjkxAX8Vw==",
+      "license": "MIT"
+    },
+    "node_modules/preact": {
+      "version": "10.29.8",
+      "resolved": "https://registry.npmjs.org/preact/-/preact-10.29.8.tgz",
+      "integrity": "sha512-ej2aVZ+vZ8WO7tvlQWRM9N63A0KzF9q4mWJfDUHgYaIofWY9hu74QdnQrjoPMmZi2/nZ5gN0bJCQF49xQqx09Q==",
+      "license": "MIT",
+      "funding": {
+        "type": "opencollective",
+        "url": "https://opencollective.com/preact"
+      },
+      "peerDependencies": {
+        "preact-render-to-string": ">=5"
+      },
+      "peerDependenciesMeta": {
+        "preact-render-to-string": {
+          "optional": true
+        }
+      }
+    },
     "node_modules/prelude-ls": {
       "version": "1.2.1",
       "resolved": "https://registry.npmjs.org/prelude-ls/-/prelude-ls-1.2.1.tgz",
@@ -8494,6 +8596,12 @@
         "node": ">=6"
       }
     },
+    "node_modules/query-selector-shadow-dom": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/query-selector-shadow-dom/-/query-selector-shadow-dom-1.0.1.tgz",
+      "integrity": "sha512-lT5yCqEBgfoMYpf3F2xQRK7zEr1rhIIZuceDK6+xRkJQ4NMbHTwXqk4NkwDwQMNqXgG9r9fyHnzwNVs6zV5KRw==",
+      "license": "MIT"
+    },
     "node_modules/react": {
       "version": "19.2.4",
       "resolved": "https://registry.npmjs.org/react/-/react-19.2.4.tgz",
@@ -9926,6 +10034,19 @@
         "node": ">=18"
       }
     },
+    "node_modules/web-vitals": {
+      "version": "6.2.1",
+      "resolved": "https://registry.npmjs.org/web-vitals/-/web-vitals-6.2.1.tgz",
+      "integrity": "sha512-rLcLXA2sx6+9dE88NHFubwTtGxpK4yYBLj6qHPdFoCaLr0cXGb4efOqtKLlm4loGA4OEKHIQKMKzZkKyOh5ctw==",
+      "license": "Apache-2.0"
+    },
+    "node_modules/web-vitals-soft-navs": {
+      "name": "web-vitals",
+      "version": "6.2.1",
+      "resolved": "https://registry.npmjs.org/web-vitals/-/web-vitals-6.2.1.tgz",
+      "integrity": "sha512-rLcLXA2sx6+9dE88NHFubwTtGxpK4yYBLj6qHPdFoCaLr0cXGb4efOqtKLlm4loGA4OEKHIQKMKzZkKyOh5ctw==",
+      "license": "Apache-2.0"
+    },
     "node_modules/webidl-conversions": {
       "version": "8.0.1",
       "resolved": "https://registry.npmjs.org/webidl-conversions/-/webidl-conversions-8.0.1.tgz",