diff --git a/.github/workflows/website-tests.yml b/.github/workflows/website-tests.yml
index 1e762273e..1f8e91384 100644
--- a/.github/workflows/website-tests.yml
+++ b/.github/workflows/website-tests.yml
@@ -36,3 +36,39 @@ jobs:
 
       - name: Run website tests
         run: pnpm exec turbo run test --filter=site
+
+  astro-check:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v5
+
+      - name: Setup pnpm
+        uses: pnpm/action-setup@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v5
+        with:
+          node-version: 22
+          cache: pnpm
+
+      - name: Install dependencies
+        run: pnpm install
+
+      - name: Cache turbo build setup
+        uses: actions/cache@v5
+        with:
+          path: .turbo
+          key: ${{ runner.os }}-turbo-${{ github.sha }}
+          restore-keys: |
+            ${{ runner.os }}-turbo-
+
+      - name: Build packages
+        run: pnpm build:packages
+
+      - name: Generate site content
+        run: cd site && pnpm api-docs && pnpm ejected-skins
+
+      - name: Astro check
+        run: cd site && pnpm astro check --minimumSeverity warning
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index b4877bd1a..a67c059c5 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -543,6 +543,9 @@ importers:
       '@testing-library/user-event':
         specifier: ^14.6.1
         version: 14.6.1(@testing-library/dom@10.4.1)
+      '@types/jsdom':
+        specifier: ^28.0.1
+        version: 28.0.1
       '@types/react':
         specifier: ^19.2.2
         version: 19.2.14
@@ -927,24 +930,28 @@ packages:
     engines: {node: '>=14.21.3'}
     cpu: [arm64]
     os: [linux]
+    libc: [musl]
 
   '@biomejs/cli-linux-arm64@2.4.6':
     resolution: {integrity: sha512-kMLaI7OF5GN1Q8Doymjro1P8rVEoy7BKQALNz6fiR8IC1WKduoNyteBtJlHT7ASIL0Cx2jR6VUOBIbcB1B8pew==}
     engines: {node: '>=14.21.3'}
     cpu: [arm64]
     os: [linux]
+    libc: [glibc]
 
   '@biomejs/cli-linux-x64-musl@2.4.6':
     resolution: {integrity: sha512-C9s98IPDu7DYarjlZNuzJKTjVHN03RUnmHV5htvqsx6vEUXCDSJ59DNwjKVD5XYoSS4N+BYhq3RTBAL8X6svEg==}
     engines: {node: '>=14.21.3'}
     cpu: [x64]
     os: [linux]
+    libc: [musl]
 
   '@biomejs/cli-linux-x64@2.4.6':
     resolution: {integrity: sha512-oHXmUFEoH8Lql1xfc3QkFLiC1hGR7qedv5eKNlC185or+o4/4HiaU7vYODAH3peRCfsuLr1g6v2fK9dFFOYdyw==}
     engines: {node: '>=14.21.3'}
     cpu: [x64]
     os: [linux]
+    libc: [glibc]
 
   '@biomejs/cli-win32-arm64@2.4.6':
     resolution: {integrity: sha512-xzThn87Pf3YrOGTEODFGONmqXpTwUNxovQb72iaUOdcw8sBSY3+3WD8Hm9IhMYLnPi0n32s3L3NWU6+eSjfqFg==}
@@ -1715,89 +1722,105 @@ packages:
     resolution: {integrity: sha512-excjX8DfsIcJ10x1Kzr4RcWe1edC9PquDRRPx3YVCvQv+U5p7Yin2s32ftzikXojb1PIFc/9Mt28/y+iRklkrw==}
     cpu: [arm64]
     os: [linux]
+    libc: [glibc]
 
   '@img/sharp-libvips-linux-arm@1.2.4':
     resolution: {integrity: sha512-bFI7xcKFELdiNCVov8e44Ia4u2byA+l3XtsAj+Q8tfCwO6BQ8iDojYdvoPMqsKDkuoOo+X6HZA0s0q11ANMQ8A==}
     cpu: [arm]
     os: [linux]
+    libc: [glibc]
 
   '@img/sharp-libvips-linux-ppc64@1.2.4':
     resolution: {integrity: sha512-FMuvGijLDYG6lW+b/UvyilUWu5Ayu+3r2d1S8notiGCIyYU/76eig1UfMmkZ7vwgOrzKzlQbFSuQfgm7GYUPpA==}
     cpu: [ppc64]
     os: [linux]
+    libc: [glibc]
 
   '@img/sharp-libvips-linux-riscv64@1.2.4':
     resolution: {integrity: sha512-oVDbcR4zUC0ce82teubSm+x6ETixtKZBh/qbREIOcI3cULzDyb18Sr/Wcyx7NRQeQzOiHTNbZFF1UwPS2scyGA==}
     cpu: [riscv64]
     os: [linux]
+    libc: [glibc]
 
   '@img/sharp-libvips-linux-s390x@1.2.4':
     resolution: {integrity: sha512-qmp9VrzgPgMoGZyPvrQHqk02uyjA0/QrTO26Tqk6l4ZV0MPWIW6LTkqOIov+J1yEu7MbFQaDpwdwJKhbJvuRxQ==}
     cpu: [s390x]
     os: [linux]
+    libc: [glibc]
 
   '@img/sharp-libvips-linux-x64@1.2.4':
     resolution: {integrity: sha512-tJxiiLsmHc9Ax1bz3oaOYBURTXGIRDODBqhveVHonrHJ9/+k89qbLl0bcJns+e4t4rvaNBxaEZsFtSfAdquPrw==}
     cpu: [x64]
     os: [linux]
+    libc: [glibc]
 
   '@img/sharp-libvips-linuxmusl-arm64@1.2.4':
     resolution: {integrity: sha512-FVQHuwx1IIuNow9QAbYUzJ+En8KcVm9Lk5+uGUQJHaZmMECZmOlix9HnH7n1TRkXMS0pGxIJokIVB9SuqZGGXw==}
     cpu: [arm64]
     os: [linux]
+    libc: [musl]
 
   '@img/sharp-libvips-linuxmusl-x64@1.2.4':
     resolution: {integrity: sha512-+LpyBk7L44ZIXwz/VYfglaX/okxezESc6UxDSoyo2Ks6Jxc4Y7sGjpgU9s4PMgqgjj1gZCylTieNamqA1MF7Dg==}
     cpu: [x64]
     os: [linux]
+    libc: [musl]
 
   '@img/sharp-linux-arm64@0.34.5':
     resolution: {integrity: sha512-bKQzaJRY/bkPOXyKx5EVup7qkaojECG6NLYswgktOZjaXecSAeCWiZwwiFf3/Y+O1HrauiE3FVsGxFg8c24rZg==}
     engines: {node: ^18.17.0 || ^20.3.0 || >=21.0.0}
     cpu: [arm64]
     os: [linux]
+    libc: [glibc]
 
   '@img/sharp-linux-arm@0.34.5':
     resolution: {integrity: sha512-9dLqsvwtg1uuXBGZKsxem9595+ujv0sJ6Vi8wcTANSFpwV/GONat5eCkzQo/1O6zRIkh0m/8+5BjrRr7jDUSZw==}
     engines: {node: ^18.17.0 || ^20.3.0 || >=21.0.0}
     cpu: [arm]
     os: [linux]
+    libc: [glibc]
 
   '@img/sharp-linux-ppc64@0.34.5':
     resolution: {integrity: sha512-7zznwNaqW6YtsfrGGDA6BRkISKAAE1Jo0QdpNYXNMHu2+0dTrPflTLNkpc8l7MUP5M16ZJcUvysVWWrMefZquA==}
     engines: {node: ^18.17.0 || ^20.3.0 || >=21.0.0}
     cpu: [ppc64]
     os: [linux]
+    libc: [glibc]
 
   '@img/sharp-linux-riscv64@0.34.5':
     resolution: {integrity: sha512-51gJuLPTKa7piYPaVs8GmByo7/U7/7TZOq+cnXJIHZKavIRHAP77e3N2HEl3dgiqdD/w0yUfiJnII77PuDDFdw==}
     engines: {node: ^18.17.0 || ^20.3.0 || >=21.0.0}
     cpu: [riscv64]
     os: [linux]
+    libc: [glibc]
 
   '@img/sharp-linux-s390x@0.34.5':
     resolution: {integrity: sha512-nQtCk0PdKfho3eC5MrbQoigJ2gd1CgddUMkabUj+rBevs8tZ2cULOx46E7oyX+04WGfABgIwmMC0VqieTiR4jg==}
     engines: {node: ^18.17.0 || ^20.3.0 || >=21.0.0}
     cpu: [s390x]
     os: [linux]
+    libc: [glibc]
 
   '@img/sharp-linux-x64@0.34.5':
     resolution: {integrity: sha512-MEzd8HPKxVxVenwAa+JRPwEC7QFjoPWuS5NZnBt6B3pu7EG2Ge0id1oLHZpPJdn3OQK+BQDiw9zStiHBTJQQQQ==}
     engines: {node: ^18.17.0 || ^20.3.0 || >=21.0.0}
     cpu: [x64]
     os: [linux]
+    libc: [glibc]
 
   '@img/sharp-linuxmusl-arm64@0.34.5':
     resolution: {integrity: sha512-fprJR6GtRsMt6Kyfq44IsChVZeGN97gTD331weR1ex1c1rypDEABN6Tm2xa1wE6lYb5DdEnk03NZPqA7Id21yg==}
     engines: {node: ^18.17.0 || ^20.3.0 || >=21.0.0}
     cpu: [arm64]
     os: [linux]
+    libc: [musl]
 
   '@img/sharp-linuxmusl-x64@0.34.5':
     resolution: {integrity: sha512-Jg8wNT1MUzIvhBFxViqrEhWDGzqymo3sV7z7ZsaWbZNDLXRJZoRGrjulp60YYtV4wfY8VIKcWidjojlLcWrd8Q==}
     engines: {node: ^18.17.0 || ^20.3.0 || >=21.0.0}
     cpu: [x64]
     os: [linux]
+    libc: [musl]
 
   '@img/sharp-wasm32@0.34.5':
     resolution: {integrity: sha512-OdWTEiVkY2PHwqkbBI8frFxQQFekHaSSkUIJkwzclWZe64O1X4UlUjqqqLaPbUpMOQk6FBu/HtlGXNblIs0huw==}
@@ -2384,36 +2407,42 @@ packages:
     engines: {node: '>= 10.0.0'}
     cpu: [arm]
     os: [linux]
+    libc: [glibc]
 
   '@parcel/watcher-linux-arm-musl@2.5.6':
     resolution: {integrity: sha512-Ve3gUCG57nuUUSyjBq/MAM0CzArtuIOxsBdQ+ftz6ho8n7s1i9E1Nmk/xmP323r2YL0SONs1EuwqBp2u1k5fxg==}
     engines: {node: '>= 10.0.0'}
     cpu: [arm]
     os: [linux]
+    libc: [musl]
 
   '@parcel/watcher-linux-arm64-glibc@2.5.6':
     resolution: {integrity: sha512-f2g/DT3NhGPdBmMWYoxixqYr3v/UXcmLOYy16Bx0TM20Tchduwr4EaCbmxh1321TABqPGDpS8D/ggOTaljijOA==}
     engines: {node: '>= 10.0.0'}
     cpu: [arm64]
     os: [linux]
+    libc: [glibc]
 
   '@parcel/watcher-linux-arm64-musl@2.5.6':
     resolution: {integrity: sha512-qb6naMDGlbCwdhLj6hgoVKJl2odL34z2sqkC7Z6kzir8b5W65WYDpLB6R06KabvZdgoHI/zxke4b3zR0wAbDTA==}
     engines: {node: '>= 10.0.0'}
     cpu: [arm64]
     os: [linux]
+    libc: [musl]
 
   '@parcel/watcher-linux-x64-glibc@2.5.6':
     resolution: {integrity: sha512-kbT5wvNQlx7NaGjzPFu8nVIW1rWqV780O7ZtkjuWaPUgpv2NMFpjYERVi0UYj1msZNyCzGlaCWEtzc+exjMGbQ==}
     engines: {node: '>= 10.0.0'}
     cpu: [x64]
     os: [linux]
+    libc: [glibc]
 
   '@parcel/watcher-linux-x64-musl@2.5.6':
     resolution: {integrity: sha512-1JRFeC+h7RdXwldHzTsmdtYR/Ku8SylLgTU/reMuqdVD7CtLwf0VR1FqeprZ0eHQkO0vqsbvFLXUmYm/uNKJBg==}
     engines: {node: '>= 10.0.0'}
     cpu: [x64]
     os: [linux]
+    libc: [musl]
 
   '@parcel/watcher-wasm@2.5.6':
     resolution: {integrity: sha512-byAiBZ1t3tXQvc8dMD/eoyE7lTXYorhn+6uVW5AC+JGI1KtJC/LvDche5cfUE+qiefH+Ybq0bUCJU0aB1cSHUA==}
@@ -2493,36 +2522,42 @@ packages:
     engines: {node: ^20.19.0 || >=22.12.0}
     cpu: [arm64]
     os: [linux]
+    libc: [glibc]
 
   '@rolldown/binding-linux-arm64-musl@1.0.0-rc.9':
     resolution: {integrity: sha512-JA1QRW31ogheAIRhIg9tjMfsYbglXXYGNPLdPEYrwFxdbkQCAzvpSCSHCDWNl4hTtrol8WeboCSEpjdZK8qrCg==}
     engines: {node: ^20.19.0 || >=22.12.0}
     cpu: [arm64]
     os: [linux]
+    libc: [musl]
 
   '@rolldown/binding-linux-ppc64-gnu@1.0.0-rc.9':
     resolution: {integrity: sha512-aOKU9dJheda8Kj8Y3w9gnt9QFOO+qKPAl8SWd7JPHP+Cu0EuDAE5wokQubLzIDQWg2myXq2XhTpOVS07qqvT+w==}
     engines: {node: ^20.19.0 || >=22.12.0}
     cpu: [ppc64]
     os: [linux]
+    libc: [glibc]
 
   '@rolldown/binding-linux-s390x-gnu@1.0.0-rc.9':
     resolution: {integrity: sha512-OalO94fqj7IWRn3VdXWty75jC5dk4C197AWEuMhIpvVv2lw9fiPhud0+bW2ctCxb3YoBZor71QHbY+9/WToadA==}
     engines: {node: ^20.19.0 || >=22.12.0}
     cpu: [s390x]
     os: [linux]
+    libc: [glibc]
 
   '@rolldown/binding-linux-x64-gnu@1.0.0-rc.9':
     resolution: {integrity: sha512-cVEl1vZtBsBZna3YMjGXNvnYYrOJ7RzuWvZU0ffvJUexWkukMaDuGhUXn0rjnV0ptzGVkvc+vW9Yqy6h8YX4pg==}
     engines: {node: ^20.19.0 || >=22.12.0}
     cpu: [x64]
     os: [linux]
+    libc: [glibc]
 
   '@rolldown/binding-linux-x64-musl@1.0.0-rc.9':
     resolution: {integrity: sha512-UzYnKCIIc4heAKgI4PZ3dfBGUZefGCJ1TPDuLHoCzgrMYPb5Rv6TLFuYtyM4rWyHM7hymNdsg5ik2C+UD9VDbA==}
     engines: {node: ^20.19.0 || >=22.12.0}
     cpu: [x64]
     os: [linux]
+    libc: [musl]
 
   '@rolldown/binding-openharmony-arm64@1.0.0-rc.9':
     resolution: {integrity: sha512-+6zoiF+RRyf5cdlFQP7nm58mq7+/2PFaY2DNQeD4B87N36JzfF/l9mdBkkmTvSYcYPE8tMh/o3cRlsx1ldLfog==}
@@ -2602,66 +2637,79 @@ packages:
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     cpu: [arm]
     os: [linux]
+    libc: [glibc]
 
   '@rollup/rollup-linux-arm-musleabihf@4.59.0':
     resolution: {integrity: sha512-CikFT7aYPA2ufMD086cVORBYGHffBo4K8MQ4uPS/ZnY54GKj36i196u8U+aDVT2LX4eSMbyHtyOh7D7Zvk2VvA==}
     cpu: [arm]
     os: [linux]
+    libc: [musl]
 
   '@rollup/rollup-linux-arm64-gnu@4.59.0':
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     cpu: [arm64]
     os: [linux]
+    libc: [glibc]
 
   '@rollup/rollup-linux-arm64-musl@4.59.0':
     resolution: {integrity: sha512-peZRVEdnFWZ5Bh2KeumKG9ty7aCXzzEsHShOZEFiCQlDEepP1dpUl/SrUNXNg13UmZl+gzVDPsiCwnV1uI0RUA==}
     cpu: [arm64]
     os: [linux]
+    libc: [musl]
 
   '@rollup/rollup-linux-loong64-gnu@4.59.0':
     resolution: {integrity: sha512-gbUSW/97f7+r4gHy3Jlup8zDG190AuodsWnNiXErp9mT90iCy9NKKU0Xwx5k8VlRAIV2uU9CsMnEFg/xXaOfXg==}
     cpu: [loong64]
     os: [linux]
+    libc: [glibc]
 
   '@rollup/rollup-linux-loong64-musl@4.59.0':
     resolution: {integrity: sha512-yTRONe79E+o0FWFijasoTjtzG9EBedFXJMl888NBEDCDV9I2wGbFFfJQQe63OijbFCUZqxpHz1GzpbtSFikJ4Q==}
     cpu: [loong64]
     os: [linux]
+    libc: [musl]
 
   '@rollup/rollup-linux-ppc64-gnu@4.59.0':
     resolution: {integrity: sha512-sw1o3tfyk12k3OEpRddF68a1unZ5VCN7zoTNtSn2KndUE+ea3m3ROOKRCZxEpmT9nsGnogpFP9x6mnLTCaoLkA==}
     cpu: [ppc64]
     os: [linux]
+    libc: [glibc]
 
   '@rollup/rollup-linux-ppc64-musl@4.59.0':
     resolution: {integrity: sha512-+2kLtQ4xT3AiIxkzFVFXfsmlZiG5FXYW7ZyIIvGA7Bdeuh9Z0aN4hVyXS/G1E9bTP/vqszNIN/pUKCk/BTHsKA==}
     cpu: [ppc64]
     os: [linux]
+    libc: [musl]
 
   '@rollup/rollup-linux-riscv64-gnu@4.59.0':
     resolution: {integrity: sha512-NDYMpsXYJJaj+I7UdwIuHHNxXZ/b/N2hR15NyH3m2qAtb/hHPA4g4SuuvrdxetTdndfj9b1WOmy73kcPRoERUg==}
     cpu: [riscv64]
     os: [linux]
+    libc: [glibc]
 
   '@rollup/rollup-linux-riscv64-musl@4.59.0':
     resolution: {integrity: sha512-nLckB8WOqHIf1bhymk+oHxvM9D3tyPndZH8i8+35p/1YiVoVswPid2yLzgX7ZJP0KQvnkhM4H6QZ5m0LzbyIAg==}
     cpu: [riscv64]
     os: [linux]
+    libc: [musl]
 
   '@rollup/rollup-linux-s390x-gnu@4.59.0':
     resolution: {integrity: sha512-oF87Ie3uAIvORFBpwnCvUzdeYUqi2wY6jRFWJAy1qus/udHFYIkplYRW+wo+GRUP4sKzYdmE1Y3+rY5Gc4ZO+w==}
     cpu: [s390x]
     os: [linux]
+    libc: [glibc]
 
   '@rollup/rollup-linux-x64-gnu@4.59.0':
     resolution: {integrity: sha512-3AHmtQq/ppNuUspKAlvA8HtLybkDflkMuLK4DPo77DfthRb71V84/c4MlWJXixZz4uruIH4uaa07IqoAkG64fg==}
     cpu: [x64]
     os: [linux]
+    libc: [glibc]
 
   '@rollup/rollup-linux-x64-musl@4.59.0':
     resolution: {integrity: sha512-2UdiwS/9cTAx7qIUZB/fWtToJwvt0Vbo0zmnYt7ED35KPg13Q0ym1g442THLC7VyI6JfYTP4PiSOWyoMdV2/xg==}
     cpu: [x64]
     os: [linux]
+    libc: [musl]
 
   '@rollup/rollup-openbsd-x64@4.59.0':
     resolution: {integrity: sha512-M3bLRAVk6GOwFlPTIxVBSYKUaqfLrn8l0psKinkCFxl4lQvOSz8ZrKDz2gxcBwHFpci0B6rttydI4IpS4IS/jQ==}
@@ -3067,24 +3115,28 @@ packages:
     engines: {node: '>= 20'}
     cpu: [arm64]
     os: [linux]
+    libc: [glibc]
 
   '@tailwindcss/oxide-linux-arm64-musl@4.2.1':
     resolution: {integrity: sha512-WZA0CHRL/SP1TRbA5mp9htsppSEkWuQ4KsSUumYQnyl8ZdT39ntwqmz4IUHGN6p4XdSlYfJwM4rRzZLShHsGAQ==}
     engines: {node: '>= 20'}
     cpu: [arm64]
     os: [linux]
+    libc: [musl]
 
   '@tailwindcss/oxide-linux-x64-gnu@4.2.1':
     resolution: {integrity: sha512-qMFzxI2YlBOLW5PhblzuSWlWfwLHaneBE0xHzLrBgNtqN6mWfs+qYbhryGSXQjFYB1Dzf5w+LN5qbUTPhW7Y5g==}
     engines: {node: '>= 20'}
     cpu: [x64]
     os: [linux]
+    libc: [glibc]
 
   '@tailwindcss/oxide-linux-x64-musl@4.2.1':
     resolution: {integrity: sha512-5r1X2FKnCMUPlXTWRYpHdPYUY6a1Ar/t7P24OuiEdEOmms5lyqjDRvVY1yy9Rmioh+AunQ0rWiOTPE8F9A3v5g==}
     engines: {node: '>= 20'}
     cpu: [x64]
     os: [linux]
+    libc: [musl]
 
   '@tailwindcss/oxide-wasm32-wasi@4.2.1':
     resolution: {integrity: sha512-MGFB5cVPvshR85MTJkEvqDUnuNoysrsRxd6vnk1Lf2tbiqNlXpHYZqkqOQalydienEWOHHFyyuTSYRsLfxFJ2Q==}
@@ -3190,6 +3242,9 @@ packages:
   '@types/hast@3.0.4':
     resolution: {integrity: sha512-WPs+bbQw5aCj+x6laNGWLH3wviHtoCv/P3+otBhbOhJgG8qtpdAMlTCxLtsTWA7LH1Oh/bFCHsBn0TPS5m30EQ==}
 
+  '@types/jsdom@28.0.1':
+    resolution: {integrity: sha512-GJq2QE4TAZ5ajSoCasn5DOFm8u1mI3tIFvM5tIq3W5U/RTB6gsHwc6Yhpl91X9VSDOUVblgXmG+2+sSvFQrdlw==}
+
   '@types/jsesc@2.5.1':
     resolution: {integrity: sha512-9VN+6yxLOPLOav+7PwjZbxiID2bVaeq0ED4qSQmdQTdjnXJSaCVKTR58t15oqH1H5t8Ng2ZX1SabJVoN9Q34bw==}
 
@@ -3255,6 +3310,9 @@ packages:
   '@types/tedious@4.0.14':
     resolution: {integrity: sha512-KHPsfX/FoVbUGbyYvk1q9MMQHLPeRZhRJZdO45Q4YjvFkv4hMNghCWTvy7rdKessBsmtz4euWCWAB6/tVpI1Iw==}
 
+  '@types/tough-cookie@4.0.5':
+    resolution: {integrity: sha512-/Ad8+nIOV7Rl++6f1BdKxFSMgmoqEoYbHRpPcx3JEfv8VRsQe9Z4mCXeJBzxs7mbHY/XOZZuXlRNfhpVPbs6ZA==}
+
   '@types/triple-beam@1.3.5':
     resolution: {integrity: sha512-6WaYesThRMCl19iryMYP7/x2OVgCtbIVflDGFpWnb9irXI3UjYE4AzmYuiUKY1AJstGijoY+MgUszMgRxIYTYw==}
 
@@ -5401,48 +5459,56 @@ packages:
     engines: {node: '>= 12.0.0'}
     cpu: [arm64]
     os: [linux]
+    libc: [glibc]
 
   lightningcss-linux-arm64-gnu@1.32.0:
     resolution: {integrity: sha512-0nnMyoyOLRJXfbMOilaSRcLH3Jw5z9HDNGfT/gwCPgaDjnx0i8w7vBzFLFR1f6CMLKF8gVbebmkUN3fa/kQJpQ==}
     engines: {node: '>= 12.0.0'}
     cpu: [arm64]
     os: [linux]
+    libc: [glibc]
 
   lightningcss-linux-arm64-musl@1.31.1:
     resolution: {integrity: sha512-mVZ7Pg2zIbe3XlNbZJdjs86YViQFoJSpc41CbVmKBPiGmC4YrfeOyz65ms2qpAobVd7WQsbW4PdsSJEMymyIMg==}
     engines: {node: '>= 12.0.0'}
     cpu: [arm64]
     os: [linux]
+    libc: [musl]
 
   lightningcss-linux-arm64-musl@1.32.0:
     resolution: {integrity: sha512-UpQkoenr4UJEzgVIYpI80lDFvRmPVg6oqboNHfoH4CQIfNA+HOrZ7Mo7KZP02dC6LjghPQJeBsvXhJod/wnIBg==}
     engines: {node: '>= 12.0.0'}
     cpu: [arm64]
     os: [linux]
+    libc: [musl]
 
   lightningcss-linux-x64-gnu@1.31.1:
     resolution: {integrity: sha512-xGlFWRMl+0KvUhgySdIaReQdB4FNudfUTARn7q0hh/V67PVGCs3ADFjw+6++kG1RNd0zdGRlEKa+T13/tQjPMA==}
     engines: {node: '>= 12.0.0'}
     cpu: [x64]
     os: [linux]
+    libc: [glibc]
 
   lightningcss-linux-x64-gnu@1.32.0:
     resolution: {integrity: sha512-V7Qr52IhZmdKPVr+Vtw8o+WLsQJYCTd8loIfpDaMRWGUZfBOYEJeyJIkqGIDMZPwPx24pUMfwSxxI8phr/MbOA==}
     engines: {node: '>= 12.0.0'}
     cpu: [x64]
     os: [linux]
+    libc: [glibc]
 
   lightningcss-linux-x64-musl@1.31.1:
     resolution: {integrity: sha512-eowF8PrKHw9LpoZii5tdZwnBcYDxRw2rRCyvAXLi34iyeYfqCQNA9rmUM0ce62NlPhCvof1+9ivRaTY6pSKDaA==}
     engines: {node: '>= 12.0.0'}
     cpu: [x64]
     os: [linux]
+    libc: [musl]
 
   lightningcss-linux-x64-musl@1.32.0:
     resolution: {integrity: sha512-bYcLp+Vb0awsiXg/80uCRezCYHNg1/l3mt0gzHnWV9XP1W5sKa5/TCdGWaR/zBM2PeF/HbsQv/j2URNOiVuxWg==}
     engines: {node: '>= 12.0.0'}
     cpu: [x64]
     os: [linux]
+    libc: [musl]
 
   lightningcss-win32-arm64-msvc@1.31.1:
     resolution: {integrity: sha512-aJReEbSEQzx1uBlQizAOBSjcmr9dCdL3XuC/6HLXAxmtErsj2ICo5yYggg1qOODQMtnjNQv2UHb9NpOuFtYe4w==}
@@ -7239,6 +7305,9 @@ packages:
   undici-types@6.21.0:
     resolution: {integrity: sha512-iwDZqg0QAGrg9Rav5H4n0M64c3mkR59cJ6wQp+7C4nI0gsmExaedaYLNO44eT4AtBBwjbTiGPMlt2Md0T9H9JQ==}
 
+  undici-types@7.24.5:
+    resolution: {integrity: sha512-kNh333UBSbgK35OIW7FwJTr9tTfVIG51Fm1tSVT7m8foPHfDVjsb7OIee/q/rs3bB2aV/3qOPgG5mHNWl1odiA==}
+
   undici@6.23.0:
     resolution: {integrity: sha512-VfQPToRA5FZs/qJxLIinmU59u0r7LXqoJkCzinq3ckNJp3vKEh7jTWN589YQ5+aoAC/TGRLyJLCPKcLQbM8r9g==}
     engines: {node: '>=18.17'}
@@ -10680,6 +10749,13 @@ snapshots:
     dependencies:
       '@types/unist': 3.0.3
 
+  '@types/jsdom@28.0.1':
+    dependencies:
+      '@types/node': 22.19.15
+      '@types/tough-cookie': 4.0.5
+      parse5: 7.3.0
+      undici-types: 7.24.5
+
   '@types/jsesc@2.5.1': {}
 
   '@types/jsonfile@6.1.4':
@@ -10756,6 +10832,8 @@ snapshots:
     dependencies:
       '@types/node': 22.19.15
 
+  '@types/tough-cookie@4.0.5': {}
+
   '@types/triple-beam@1.3.5': {}
 
   '@types/turndown@5.0.6': {}
@@ -10883,7 +10961,7 @@ snapshots:
       '@vitest/mocker': 4.1.0(vite@8.0.0(@types/node@22.19.15)(esbuild@0.27.3)(jiti@2.6.1)(tsx@4.21.0)(yaml@2.8.2))
       playwright: 1.58.2
       tinyrainbow: 3.1.0
-      vitest: 4.1.0(@opentelemetry/api@1.9.0)(@types/node@22.19.15)(@vitest/browser-playwright@4.1.0)(@vitest/ui@4.1.0)(happy-dom@18.0.1)(jsdom@27.4.0)(vite@8.0.0(@types/node@22.19.15)(esbuild@0.27.3)(jiti@2.6.1)(tsx@4.21.0)(yaml@2.8.2))
+      vitest: 4.1.0(@opentelemetry/api@1.9.0)(@types/node@22.19.15)(@vitest/browser-playwright@4.1.0)(@vitest/ui@4.1.0)(happy-dom@18.0.1)(jsdom@26.1.0)(vite@8.0.0(@types/node@22.19.15)(esbuild@0.27.3)(jiti@2.6.1)(tsx@4.21.0)(yaml@2.8.2))
     transitivePeerDependencies:
       - bufferutil
       - msw
@@ -10967,7 +11045,7 @@ snapshots:
       sirv: 3.0.2
       tinyglobby: 0.2.15
       tinyrainbow: 3.1.0
-      vitest: 4.1.0(@opentelemetry/api@1.9.0)(@types/node@22.19.15)(@vitest/browser-playwright@4.1.0)(@vitest/ui@4.1.0)(happy-dom@18.0.1)(jsdom@27.4.0)(vite@8.0.0(@types/node@22.19.15)(esbuild@0.27.3)(jiti@2.6.1)(tsx@4.21.0)(yaml@2.8.2))
+      vitest: 4.1.0(@opentelemetry/api@1.9.0)(@types/node@22.19.15)(@vitest/browser-playwright@4.1.0)(@vitest/ui@4.1.0)(happy-dom@18.0.1)(jsdom@26.1.0)(vite@8.0.0(@types/node@22.19.15)(esbuild@0.27.3)(jiti@2.6.1)(tsx@4.21.0)(yaml@2.8.2))
 
   '@vitest/utils@4.1.0':
     dependencies:
@@ -15544,6 +15622,8 @@ snapshots:
 
   undici-types@6.21.0: {}
 
+  undici-types@7.24.5: {}
+
   undici@6.23.0: {}
 
   unicorn-magic@0.1.0: {}
diff --git a/site/astro.config.mjs b/site/astro.config.mjs
index 7ce1b3757..dd47b8974 100644
--- a/site/astro.config.mjs
+++ b/site/astro.config.mjs
@@ -32,7 +32,7 @@ export default defineConfig({
   site: SITE_URL,
   trailingSlash: 'never',
   adapter: netlify({
-    devFeatures: { images: false },
+    devFeatures: { environmentVariables: false, images: false },
   }),
   // Server-only secrets read at runtime (not inlined at build time).
   // All optional — the site degrades gracefully without auth/Mux configured.
@@ -115,6 +115,7 @@ export default defineConfig({
   },
 
   vite: {
+    // @ts-expect-error — Astro 5 uses Vite 6 types, but these plugins ship Vite 8 types. Compatible at runtime.
     plugins: [tailwindcss(), svgr()],
     optimizeDeps: {
       exclude: ['@videojs/react', '@videojs/html'],
diff --git a/site/netlify/edge-functions/markdown-negotiation.ts b/site/netlify/edge-functions/markdown-negotiation.ts
index dededbe8e..9a95411c1 100644
--- a/site/netlify/edge-functions/markdown-negotiation.ts
+++ b/site/netlify/edge-functions/markdown-negotiation.ts
@@ -1,6 +1,6 @@
 import type { Config, Context } from '@netlify/edge-functions';
 
-export default async (request: Request, context: Context) => {
+export default async (request: Request, _context: Context) => {
   const url = new URL(request.url);
   const path = url.pathname.replace(/\/$/, '');
 
diff --git a/site/package.json b/site/package.json
index 91a7c3e3d..39e22b289 100644
--- a/site/package.json
+++ b/site/package.json
@@ -61,6 +61,7 @@
     "@testing-library/jest-dom": "^6.9.1",
     "@testing-library/react": "^16.3.0",
     "@testing-library/user-event": "^14.6.1",
+    "@types/jsdom": "^28.0.1",
     "@types/react": "^19.2.2",
     "@types/react-dom": "^19.2.1",
     "@types/turndown": "^5.0.6",
diff --git a/site/scripts/api-docs-builder/src/core-handler.ts b/site/scripts/api-docs-builder/src/core-handler.ts
index 7bdfa1268..28a812ccf 100644
--- a/site/scripts/api-docs-builder/src/core-handler.ts
+++ b/site/scripts/api-docs-builder/src/core-handler.ts
@@ -73,7 +73,7 @@ export function extractDefaultProps(
 
   const defaultProps: Record<string, string> = {};
 
-  function visit(node: ts.Node) {
+  const visit = (node: ts.Node) => {
     // Look for class declaration
     if (ts.isClassDeclaration(node) && node.name?.text === `${componentName}Core`) {
       for (const member of node.members) {
@@ -103,7 +103,7 @@ export function extractDefaultProps(
     }
 
     ts.forEachChild(node, visit);
-  }
+  };
 
   visit(sourceFile);
 
diff --git a/site/scripts/api-docs-builder/src/css-vars-handler.ts b/site/scripts/api-docs-builder/src/css-vars-handler.ts
index 271bf61a4..8f158f378 100644
--- a/site/scripts/api-docs-builder/src/css-vars-handler.ts
+++ b/site/scripts/api-docs-builder/src/css-vars-handler.ts
@@ -42,7 +42,7 @@ export function extractCSSVars(filePath: string, program: ts.Program, componentN
   const vars: Array<{ name: string; description: string }> = [];
   const expectedName = `${componentName}CSSVars`;
 
-  function visit(node: ts.Node) {
+  const visit = (node: ts.Node) => {
     if (ts.isVariableStatement(node)) {
       for (const decl of node.declarationList.declarations) {
         if (!ts.isIdentifier(decl.name) || decl.name.text !== expectedName || !decl.initializer) {
@@ -74,7 +74,7 @@ export function extractCSSVars(filePath: string, program: ts.Program, componentN
     }
 
     ts.forEachChild(node, visit);
-  }
+  };
 
   visit(sourceFile);
 
diff --git a/site/scripts/api-docs-builder/src/data-attrs-handler.ts b/site/scripts/api-docs-builder/src/data-attrs-handler.ts
index f69bc478c..208830318 100644
--- a/site/scripts/api-docs-builder/src/data-attrs-handler.ts
+++ b/site/scripts/api-docs-builder/src/data-attrs-handler.ts
@@ -88,7 +88,7 @@ export function extractDataAttrs(
   // Common naming patterns for data attributes exports
   const possibleNames = [`${componentName}DataAttrs`, `${componentName}DataAttributes`];
 
-  function visit(node: ts.Node) {
+  const visit = (node: ts.Node) => {
     // Look for variable declaration like: export const PlayButtonDataAttrs = { ... }
     if (ts.isVariableStatement(node)) {
       for (const decl of node.declarationList.declarations) {
@@ -136,7 +136,7 @@ export function extractDataAttrs(
     }
 
     ts.forEachChild(node, visit);
-  }
+  };
 
   visit(sourceFile);
 
diff --git a/site/scripts/api-docs-builder/src/formatter.ts b/site/scripts/api-docs-builder/src/formatter.ts
index 3be3a5594..746d51c14 100644
--- a/site/scripts/api-docs-builder/src/formatter.ts
+++ b/site/scripts/api-docs-builder/src/formatter.ts
@@ -106,7 +106,7 @@ export function formatProperties(props: tae.PropertyNode[], allExports?: tae.Exp
 
     const entry: PropDef = { type: abbreviated ?? expandedType };
     if (abbreviated && expandedType !== abbreviated) entry.detailedType = expandedType;
-    if (prop.documentation?.defaultValue !== undefined) entry.default = prop.documentation.defaultValue;
+    if (prop.documentation?.defaultValue !== undefined) entry.default = String(prop.documentation.defaultValue);
     if (!prop.optional) entry.required = true;
     if (prop.documentation?.description !== undefined) entry.description = prop.documentation.description;
 
diff --git a/site/scripts/api-docs-builder/src/tests/fixtures/monorepo/packages/html/src/player/create-player.ts b/site/scripts/api-docs-builder/src/tests/fixtures/monorepo/packages/html/src/player/create-player.ts
index cca094b64..82eb92e64 100644
--- a/site/scripts/api-docs-builder/src/tests/fixtures/monorepo/packages/html/src/player/create-player.ts
+++ b/site/scripts/api-docs-builder/src/tests/fixtures/monorepo/packages/html/src/player/create-player.ts
@@ -8,6 +8,6 @@ interface HtmlPlayerOptions {
 }
 
 /** Create an HTML player instance. */
-export function createPlayer(options: HtmlPlayerOptions): HtmlPlayerInstance {
+export function createPlayer(_options: HtmlPlayerOptions): HtmlPlayerInstance {
   return {} as HtmlPlayerInstance;
 }
diff --git a/site/scripts/api-docs-builder/src/tests/fixtures/monorepo/packages/react/src/player/context.tsx b/site/scripts/api-docs-builder/src/tests/fixtures/monorepo/packages/react/src/player/context.tsx
index 481bafc8f..7979ffa41 100644
--- a/site/scripts/api-docs-builder/src/tests/fixtures/monorepo/packages/react/src/player/context.tsx
+++ b/site/scripts/api-docs-builder/src/tests/fixtures/monorepo/packages/react/src/player/context.tsx
@@ -11,6 +11,6 @@ interface StoreState {
 /** Access the player store or select state from it. */
 export function usePlayer(): PlayerStore;
 export function usePlayer<R>(selector: (state: StoreState) => R): R;
-export function usePlayer<R>(selector?: (state: StoreState) => R): PlayerStore | R {
+export function usePlayer<R>(_selector?: (state: StoreState) => R): PlayerStore | R {
   return {} as PlayerStore | R;
 }
diff --git a/site/scripts/api-docs-builder/src/tests/fixtures/monorepo/packages/react/src/player/create-player.ts b/site/scripts/api-docs-builder/src/tests/fixtures/monorepo/packages/react/src/player/create-player.ts
index 282dcb07e..d3c475d7c 100644
--- a/site/scripts/api-docs-builder/src/tests/fixtures/monorepo/packages/react/src/player/create-player.ts
+++ b/site/scripts/api-docs-builder/src/tests/fixtures/monorepo/packages/react/src/player/create-player.ts
@@ -8,6 +8,6 @@ interface PlayerOptions {
 }
 
 /** Create a React player instance. */
-export function createPlayer(options?: PlayerOptions): PlayerInstance {
+export function createPlayer(_options?: PlayerOptions): PlayerInstance {
   return {} as PlayerInstance;
 }
diff --git a/site/scripts/api-docs-builder/src/tests/fixtures/monorepo/packages/store/src/html/controllers/snapshot-controller.ts b/site/scripts/api-docs-builder/src/tests/fixtures/monorepo/packages/store/src/html/controllers/snapshot-controller.ts
index c1d5d26d6..a2f43f29f 100644
--- a/site/scripts/api-docs-builder/src/tests/fixtures/monorepo/packages/store/src/html/controllers/snapshot-controller.ts
+++ b/site/scripts/api-docs-builder/src/tests/fixtures/monorepo/packages/store/src/html/controllers/snapshot-controller.ts
@@ -25,7 +25,7 @@ export class SnapshotController<S, R = S> implements ReactiveController {
    * @param state - The store to snapshot.
    */
   constructor(host: ReactiveControllerHost, state: Store<S>);
-  constructor(host: ReactiveControllerHost, state: Store<S>, selector?: (state: S) => R) {
+  constructor(host: ReactiveControllerHost, _state: Store<S>, _selector?: (state: S) => R) {
     host.addController(this);
   }
 
diff --git a/site/scripts/api-docs-builder/src/tests/fixtures/monorepo/packages/store/src/react/hooks/use-store.ts b/site/scripts/api-docs-builder/src/tests/fixtures/monorepo/packages/store/src/react/hooks/use-store.ts
index f0e987c3d..46ea85c6a 100644
--- a/site/scripts/api-docs-builder/src/tests/fixtures/monorepo/packages/store/src/react/hooks/use-store.ts
+++ b/site/scripts/api-docs-builder/src/tests/fixtures/monorepo/packages/store/src/react/hooks/use-store.ts
@@ -5,6 +5,6 @@ interface Store<S> {
 /** Subscribe to a store. */
 export function useStore<S>(store: Store<S>): S;
 export function useStore<S, R>(store: Store<S>, selector: (state: S) => R): R;
-export function useStore<S, R>(store: Store<S>, selector?: (state: S) => R): S | R {
+export function useStore<S, R>(_store: Store<S>, _selector?: (state: S) => R): S | R {
   return {} as S | R;
 }
diff --git a/site/scripts/api-docs-builder/src/util-handler.ts b/site/scripts/api-docs-builder/src/util-handler.ts
index 840d9c0e3..96a26d053 100644
--- a/site/scripts/api-docs-builder/src/util-handler.ts
+++ b/site/scripts/api-docs-builder/src/util-handler.ts
@@ -395,12 +395,15 @@ function extractPublicMembers(
   for (const member of classDecl.members) {
     // Skip private, protected, static, constructor
     if (
-      member.modifiers?.some(
-        (m) =>
-          m.kind === ts.SyntaxKind.PrivateKeyword ||
-          m.kind === ts.SyntaxKind.ProtectedKeyword ||
-          m.kind === ts.SyntaxKind.StaticKeyword
-      )
+      ts.canHaveModifiers(member) &&
+      ts
+        .getModifiers(member)
+        ?.some(
+          (m: ts.ModifierLike) =>
+            m.kind === ts.SyntaxKind.PrivateKeyword ||
+            m.kind === ts.SyntaxKind.ProtectedKeyword ||
+            m.kind === ts.SyntaxKind.StaticKeyword
+        )
     )
       continue;
 
@@ -502,7 +505,7 @@ function getNodeJSDoc(node: ts.Node): string | undefined {
   if (typeof doc.comment === 'string') return doc.comment;
 
   // Handle JSDocComment array
-  return doc.comment.map((c: ts.JSDocText | ts.JSDocLink) => ('text' in c ? c.text : '')).join('');
+  return doc.comment.map((c: ts.JSDocComment) => ('text' in c ? c.text : '')).join('');
 }
 
 function getJSDocParamDescription(node: ts.Node, paramName: string): string | undefined {
@@ -517,7 +520,7 @@ function getJSDocParamDescription(node: ts.Node, paramName: string): string | un
         const raw =
           typeof tag.comment === 'string'
             ? tag.comment
-            : tag.comment.map((c: ts.JSDocText | ts.JSDocLink) => ('text' in c ? c.text : '')).join('');
+            : tag.comment.map((c: ts.JSDocComment) => ('text' in c ? c.text : '')).join('');
         return raw.replace(/^\s*-\s+/, '');
       }
     }
@@ -550,7 +553,7 @@ function getJSDocTagValue(node: ts.Node, tagName: string): string | undefined {
         if (!tag.comment) return undefined;
         if (typeof tag.comment === 'string') return tag.comment.trim();
         return tag.comment
-          .map((c: ts.JSDocText | ts.JSDocLink) => ('text' in c ? c.text : ''))
+          .map((c: ts.JSDocComment) => ('text' in c ? c.text : ''))
           .join('')
           .trim();
       }
@@ -947,7 +950,7 @@ function discoverUtilExports(monorepoRoot: string, program: ts.Program): UtilEnt
     for (const modulePath of modulesToScan) {
       if (!fs.existsSync(modulePath)) continue;
 
-      let ast: tae.Module;
+      let ast: tae.ModuleNode;
       try {
         ast = tae.parseFromProgram(modulePath, program);
       } catch {
diff --git a/site/scripts/build-ejected-skins.ts b/site/scripts/build-ejected-skins.ts
index f964335ec..4093f9ff6 100644
--- a/site/scripts/build-ejected-skins.ts
+++ b/site/scripts/build-ejected-skins.ts
@@ -257,13 +257,6 @@ function getStatementName(statement: ts.Statement): string | null {
   return null;
 }
 
-function parseNames(raw: string): string[] {
-  return raw
-    .split(',')
-    .map((s) => s.trim())
-    .filter(Boolean);
-}
-
 function isRelativeImport(specifier: string): boolean {
   return specifier.startsWith('./') || specifier.startsWith('../');
 }
diff --git a/site/src/components/FooterDocs.astro b/site/src/components/FooterDocs.astro
index 61beb2221..51ede5bc1 100644
--- a/site/src/components/FooterDocs.astro
+++ b/site/src/components/FooterDocs.astro
@@ -3,7 +3,6 @@ import { ArrowUpRight } from 'lucide-react';
 import { DISCORD_INVITE_URL, GITHUB_REPO_URL, MUX_URL } from '@/consts';
 import Discord from './icons/discord.svg?react';
 import GitHub from './icons/github.svg?react';
-import LogoMonoVersion from './icons/logo-mono.svg?react';
 import GetStartedLink from './NavBar/GetStartedLink';
 import { ThemeToggle } from './ThemeToggle';
 
diff --git a/site/src/components/JsonLd.astro b/site/src/components/JsonLd.astro
index ce9cf6f03..e88fbba87 100644
--- a/site/src/components/JsonLd.astro
+++ b/site/src/components/JsonLd.astro
@@ -9,4 +9,7 @@ interface Props {
 const { schema } = Astro.props;
 ---
 
+{
+  /* astro(4000) is expected — JSON-LD is static data that should be inline (withastro/astro#3544) */
+}
 <script type="application/ld+json" set:html={JSON.stringify(schema)} />
diff --git a/site/src/components/NavBar/NavBar.astro b/site/src/components/NavBar/NavBar.astro
index 502e5ceda..81325d6f7 100644
--- a/site/src/components/NavBar/NavBar.astro
+++ b/site/src/components/NavBar/NavBar.astro
@@ -10,7 +10,6 @@ import GetStartedLink from './GetStartedLink';
 import MobileNav from './MobileNav';
 
 export interface Props {
-  dark?: boolean;
   class?: string;
 }
 
@@ -28,7 +27,7 @@ const navLinks: NavLink[] = [
 const currentPath = Astro.url.pathname;
 const isDocsActive = currentPath.startsWith('/docs');
 const otherNavLinks = navLinks.filter((link) => link.href !== '/docs');
-const { class: className, dark = false } = Astro.props;
+const { class: className } = Astro.props;
 ---
 
 <nav
diff --git a/site/src/components/ThemeInit.astro b/site/src/components/ThemeInit.astro
index e750e2ff6..96da16d3e 100644
--- a/site/src/components/ThemeInit.astro
+++ b/site/src/components/ThemeInit.astro
@@ -3,6 +3,9 @@ import { THEME_KEY } from '@/consts';
 ---
 
 {/* Dark mode initialization script - runs before paint to prevent FOUC */}
+{
+  /* ts(2570) on localStorageKey is expected — astro check can't see define:vars injections (withastro/language-tools#711) */
+}
 <script is:inline define:vars={{ localStorageKey: THEME_KEY }}>
   if (
     typeof localStorage !== "undefined" &&
diff --git a/site/src/components/blog/AuthorSocialLinks.tsx b/site/src/components/blog/AuthorSocialLinks.tsx
index 755e052f4..c8a133650 100644
--- a/site/src/components/blog/AuthorSocialLinks.tsx
+++ b/site/src/components/blog/AuthorSocialLinks.tsx
@@ -1,3 +1,5 @@
+// Github, Linkedin, Twitter are deprecated brand icons (lucide-icons/lucide#670).
+// Lucide will remove them in v1.0 — replace with simple-icons or custom SVGs then.
 import { AtSign, Github, Globe, Linkedin, Twitter } from 'lucide-react';
 import { Fragment } from 'react';
 import { Tooltip, TooltipProvider } from '../Tooltip';
diff --git a/site/src/components/blog/BlogPostCard.astro b/site/src/components/blog/BlogPostCard.astro
index b22c04abf..7ee88822c 100644
--- a/site/src/components/blog/BlogPostCard.astro
+++ b/site/src/components/blog/BlogPostCard.astro
@@ -1,16 +1,14 @@
 ---
 
-import { Image } from 'astro:assets';
 import type { CollectionEntry } from 'astro:content';
 import FormattedDate from '@/components/FormattedDate.astro';
 
 interface Props {
   post: CollectionEntry<'blog'>;
   authors: CollectionEntry<'authors'>[];
-  asLink?: boolean;
 }
 
-const { post, authors, asLink } = Astro.props;
+const { post, authors } = Astro.props;
 ---
 
 <article>
diff --git a/site/src/components/docs/api-reference/DetailRow.astro b/site/src/components/docs/api-reference/DetailRow.astro
index bab8d8c00..4aba6510b 100644
--- a/site/src/components/docs/api-reference/DetailRow.astro
+++ b/site/src/components/docs/api-reference/DetailRow.astro
@@ -25,7 +25,7 @@ interface Props {
   colspan: number;
 }
 
-const { id, name, type, attributeName, detailedType, description, colspan } = Astro.props;
+const { id, name, attributeName, detailedType, description, colspan } = Astro.props;
 
 const hasDetail = Boolean(attributeName || detailedType || description);
 ---
diff --git a/site/src/components/docs/demos/html-create-player/html/css/BasicUsage.ts b/site/src/components/docs/demos/html-create-player/html/css/BasicUsage.ts
index 1b53677b5..211e761c1 100644
--- a/site/src/components/docs/demos/html-create-player/html/css/BasicUsage.ts
+++ b/site/src/components/docs/demos/html-create-player/html/css/BasicUsage.ts
@@ -37,7 +37,7 @@ class PlayToggle extends MediaElement {
       isDisabled: () => !this.#player.value,
     });
 
-    applyElementProps(this, buttonProps, this.#disconnect.signal);
+    applyElementProps(this, buttonProps, { signal: this.#disconnect.signal });
   }
 
   override disconnectedCallback(): void {
@@ -46,8 +46,8 @@ class PlayToggle extends MediaElement {
     this.#disconnect = null;
   }
 
-  protected override update(): void {
-    super.update();
+  protected override update(changed: Map<string, unknown>): void {
+    super.update(changed);
     const state = this.#player.value;
     if (!state) return;
     applyStateDataAttrs(this, state, { paused: 'data-paused', ended: 'data-ended' });
diff --git a/site/src/components/docs/demos/player-controller/html/css/BasicUsage.ts b/site/src/components/docs/demos/player-controller/html/css/BasicUsage.ts
index 58c974daa..c4952f15d 100644
--- a/site/src/components/docs/demos/player-controller/html/css/BasicUsage.ts
+++ b/site/src/components/docs/demos/player-controller/html/css/BasicUsage.ts
@@ -1,4 +1,12 @@
-import { applyElementProps, createButton, createPlayer, MediaElement } from '@videojs/html';
+import {
+  applyElementProps,
+  createButton,
+  createPlayer,
+  MediaElement,
+  selectPlayback,
+  selectTime,
+  selectVolume,
+} from '@videojs/html';
 import { videoFeatures } from '@videojs/html/video';
 import '@videojs/html/media/container';
 
@@ -28,7 +36,7 @@ class PlayerActions extends MediaElement {
 
     const bind = (el: HTMLElement, action: () => void) => {
       const props = createButton({ onActivate: action, isDisabled: () => !this.#player.value });
-      applyElementProps(el, props, signal);
+      applyElementProps(el, props, { signal });
     };
 
     bind(playBtn, () => this.#player.value?.play());
@@ -46,20 +54,20 @@ class PlayerActions extends MediaElement {
 class PlayerState extends MediaElement {
   static readonly tagName = 'demo-ctrl-state';
 
-  readonly #state = new PlayerController(this, context, (s) => ({
-    paused: s.paused,
-    currentTime: s.currentTime,
-    volume: s.volume,
-  }));
+  readonly #playback = new PlayerController(this, context, selectPlayback);
+  readonly #time = new PlayerController(this, context, selectTime);
+  readonly #volume = new PlayerController(this, context, selectVolume);
 
-  protected override update(): void {
-    super.update();
-    const state = this.#state.value;
-    if (!state) return;
+  protected override update(changed: Map<string, unknown>): void {
+    super.update(changed);
+    const playback = this.#playback.value;
+    const time = this.#time.value;
+    const volume = this.#volume.value;
+    if (!playback) return;
 
     const el = this.querySelector('.state-text');
     if (el) {
-      el.textContent = `Paused: ${state.paused ? 'Yes' : 'No'} | Time: ${state.currentTime.toFixed(1)}s | Volume: ${Math.round(state.volume * 100)}%`;
+      el.textContent = `Paused: ${playback.paused ? 'Yes' : 'No'} | Time: ${(time?.currentTime ?? 0).toFixed(1)}s | Volume: ${Math.round((volume?.volume ?? 0) * 100)}%`;
     }
   }
 }
diff --git a/site/src/components/docs/demos/use-button/react/css/BasicUsage.tsx b/site/src/components/docs/demos/use-button/react/css/BasicUsage.tsx
index 49d18cc09..07e673e56 100644
--- a/site/src/components/docs/demos/use-button/react/css/BasicUsage.tsx
+++ b/site/src/components/docs/demos/use-button/react/css/BasicUsage.tsx
@@ -1,4 +1,5 @@
 import { useButton } from '@videojs/react';
+import type { Ref } from 'react';
 import { useState } from 'react';
 
 import './BasicUsage.css';
@@ -15,7 +16,12 @@ export default function BasicUsage() {
 
   return (
     <div className="react-use-button-basic">
-      <button ref={buttonRef} {...getButtonProps()} className="react-use-button-basic__button" disabled={disabled}>
+      <button
+        ref={buttonRef as Ref<HTMLButtonElement>}
+        {...getButtonProps()}
+        className="react-use-button-basic__button"
+        disabled={disabled}
+      >
         Activated {count} times
       </button>
       <label className="react-use-button-basic__label">
diff --git a/site/src/components/docs/demos/use-media/react/css/BasicUsage.tsx b/site/src/components/docs/demos/use-media/react/css/BasicUsage.tsx
index 97a07f69e..2717bb209 100644
--- a/site/src/components/docs/demos/use-media/react/css/BasicUsage.tsx
+++ b/site/src/components/docs/demos/use-media/react/css/BasicUsage.tsx
@@ -22,14 +22,18 @@ function MediaInfo() {
         <dt>src</dt>
         <dd>{media.currentSrc || '—'}</dd>
       </div>
-      <div>
-        <dt>videoWidth</dt>
-        <dd>{media.videoWidth}px</dd>
-      </div>
-      <div>
-        <dt>videoHeight</dt>
-        <dd>{media.videoHeight}px</dd>
-      </div>
+      {media instanceof HTMLVideoElement && (
+        <>
+          <div>
+            <dt>videoWidth</dt>
+            <dd>{media.videoWidth}px</dd>
+          </div>
+          <div>
+            <dt>videoHeight</dt>
+            <dd>{media.videoHeight}px</dd>
+          </div>
+        </>
+      )}
     </dl>
   );
 }
diff --git a/site/src/components/home/Demo/Demo.astro b/site/src/components/home/Demo/Demo.astro
index d946b5105..29defdef4 100644
--- a/site/src/components/home/Demo/Demo.astro
+++ b/site/src/components/home/Demo/Demo.astro
@@ -30,6 +30,7 @@ const minimalVideoReact = (await getEntry('ejectedSkins', 'minimal-video-react')
     </p>
 
     <FrameworkControl client:idle className="mb-5 md:hidden" />
+    {/* @ts-expect-error — astro#9451 */}
     <BaseDemo client:idle className="m-0 lg:h-100">
       <ServerCode
         slot="baseDefaultHtml"
@@ -67,6 +68,7 @@ const minimalVideoReact = (await getEntry('ejectedSkins', 'minimal-video-react')
       Make your player truly your own with fully-editable components
     </p>
     <FrameworkControl client:idle className="mb-5 md:hidden" />
+    {/* @ts-expect-error — astro#9451 */}
     <EjectDemo client:idle className="m-0 lg:h-100">
       <ServerCode
         slot="defaultHtmlCode"
diff --git a/site/src/components/icons/SocialProofLogos.tsx b/site/src/components/icons/SocialProofLogos.tsx
index 7b3fa0c65..1f290aa1f 100644
--- a/site/src/components/icons/SocialProofLogos.tsx
+++ b/site/src/components/icons/SocialProofLogos.tsx
@@ -2,7 +2,7 @@ interface IconProps extends React.SVGProps<SVGSVGElement> {
   width?: string;
 }
 
-export const AdobeLogo = ({ width = '1', ...props }: IconProps) => {
+export const AdobeLogo = ({ width = '1' }: IconProps) => {
   return (
     <svg
       aria-label="Adobe Logo"
@@ -20,7 +20,7 @@ export const AdobeLogo = ({ width = '1', ...props }: IconProps) => {
     </svg>
   );
 };
-export const LinkedinLogo = ({ width = '1', ...props }: IconProps) => {
+export const LinkedinLogo = ({ width = '1' }: IconProps) => {
   return (
     <svg
       aria-label="Linkedin Logo"
@@ -38,7 +38,7 @@ export const LinkedinLogo = ({ width = '1', ...props }: IconProps) => {
     </svg>
   );
 };
-export const UdemyLogo = ({ width = '1', ...props }: IconProps) => {
+export const UdemyLogo = ({ width = '1' }: IconProps) => {
   return (
     <svg
       aria-label="Linkedin Logo"
@@ -56,7 +56,7 @@ export const UdemyLogo = ({ width = '1', ...props }: IconProps) => {
     </svg>
   );
 };
-export const AmazonLogo = ({ width = '1', ...props }: IconProps) => {
+export const AmazonLogo = ({ width = '1' }: IconProps) => {
   return (
     <svg
       aria-label="Linkedin Logo"
@@ -74,7 +74,7 @@ export const AmazonLogo = ({ width = '1', ...props }: IconProps) => {
     </svg>
   );
 };
-export const AwgeLogo = ({ width = '1', ...props }: IconProps) => {
+export const AwgeLogo = ({ width: _width = '1' }: IconProps) => {
   return (
     <svg
       aria-label="Awge Logo"
@@ -94,7 +94,7 @@ export const AwgeLogo = ({ width = '1', ...props }: IconProps) => {
     </svg>
   );
 };
-export const ZoomLogo = ({ width = '1', ...props }: IconProps) => {
+export const ZoomLogo = ({ width = '1' }: IconProps) => {
   return (
     <svg
       aria-label="Linkedin Logo"
@@ -114,7 +114,7 @@ export const ZoomLogo = ({ width = '1', ...props }: IconProps) => {
     </svg>
   );
 };
-export const CourseraLogo = ({ width = '1', ...props }: IconProps) => {
+export const CourseraLogo = ({ width: _width = '1' }: IconProps) => {
   return (
     <svg
       aria-label="Coursera Logo"
@@ -134,7 +134,7 @@ export const CourseraLogo = ({ width = '1', ...props }: IconProps) => {
     </svg>
   );
 };
-export const CNNLogo = ({ width = '1', ...props }: IconProps) => {
+export const CNNLogo = ({ width = '1' }: IconProps) => {
   return (
     <svg
       aria-label="Linkedin Logo"
@@ -152,7 +152,7 @@ export const CNNLogo = ({ width = '1', ...props }: IconProps) => {
     </svg>
   );
 };
-export const ConsumerReports = ({ width = '1', ...props }: IconProps) => {
+export const ConsumerReports = ({ width = '1' }: IconProps) => {
   return (
     <svg
       aria-label="Linkedin Logo"
@@ -170,7 +170,7 @@ export const ConsumerReports = ({ width = '1', ...props }: IconProps) => {
     </svg>
   );
 };
-export const TheOnionLogo = ({ width = '1', ...props }: IconProps) => {
+export const TheOnionLogo = ({ width: _width = '1' }: IconProps) => {
   return (
     <svg
       aria-label="The Onion Logo"
@@ -190,7 +190,7 @@ export const TheOnionLogo = ({ width = '1', ...props }: IconProps) => {
     </svg>
   );
 };
-export const SAPLogo = ({ width = '1', ...props }: IconProps) => {
+export const SAPLogo = ({ width = '1' }: IconProps) => {
   return (
     <svg
       aria-label="Linkedin Logo"
@@ -208,7 +208,7 @@ export const SAPLogo = ({ width = '1', ...props }: IconProps) => {
     </svg>
   );
 };
-export const DropboxLogo = ({ width = '1', ...props }: IconProps) => {
+export const DropboxLogo = ({ width = '1' }: IconProps) => {
   return (
     <svg
       aria-label="Linkedin Logo"
diff --git a/site/src/components/installation/JSPicker.astro b/site/src/components/installation/JSPicker.astro
index c0e1ec080..9da392bad 100644
--- a/site/src/components/installation/JSPicker.astro
+++ b/site/src/components/installation/JSPicker.astro
@@ -1,13 +1,12 @@
 ---
-import type { SupportedFramework, SupportedStyle } from '@/types/docs';
+import type { SupportedFramework } from '@/types/docs';
 import JSPickerClient from './JSPickerClient';
 
-const { framework, style, slug } = Astro.params;
+const { framework, slug } = Astro.params;
 ---
 
 <JSPickerClient
   client:idle
   currentFramework={framework as SupportedFramework}
-  currentStyle={style as SupportedStyle<SupportedFramework>}
   currentSlug={slug as string}
 />
diff --git a/site/src/components/installation/JSPickerClient.tsx b/site/src/components/installation/JSPickerClient.tsx
index da04fb3d7..e897674fd 100644
--- a/site/src/components/installation/JSPickerClient.tsx
+++ b/site/src/components/installation/JSPickerClient.tsx
@@ -1,7 +1,7 @@
 import { Atom, Globe } from 'lucide-react';
 import type { ReactNode } from 'react';
 import ImageRadioGroup from '@/components/ImageRadioGroup';
-import type { SupportedFramework, SupportedStyle } from '@/types/docs';
+import type { SupportedFramework } from '@/types/docs';
 import { FRAMEWORK_LABELS, isValidFramework, SUPPORTED_FRAMEWORKS } from '@/types/docs';
 import { resolveFrameworkChange } from '@/utils/docs/routing';
 
@@ -12,18 +12,16 @@ const FRAMEWORK_IMAGES: Record<SupportedFramework, ReactNode> = {
 
 interface Props {
   currentFramework: SupportedFramework;
-  currentStyle: SupportedStyle<SupportedFramework>;
   currentSlug: string;
 }
 
-export default function JSPickerClient({ currentFramework, currentStyle, currentSlug }: Props) {
+export default function JSPickerClient({ currentFramework, currentSlug }: Props) {
   const handleFrameworkChange = (newFramework: SupportedFramework | null) => {
     if (newFramework === null) return;
     if (!isValidFramework(newFramework)) return;
 
     const { url, shouldReplace } = resolveFrameworkChange({
       currentFramework,
-      currentStyle,
       currentSlug,
       newFramework,
     });
diff --git a/site/src/components/installation/MuxUploaderPanel.tsx b/site/src/components/installation/MuxUploaderPanel.tsx
index 037c158f4..4f19cc36d 100644
--- a/site/src/components/installation/MuxUploaderPanel.tsx
+++ b/site/src/components/installation/MuxUploaderPanel.tsx
@@ -1,5 +1,4 @@
 import { actions } from 'astro:actions';
-import type MuxUploaderElement from '@mux/mux-uploader';
 
 import MuxUploader, {
   MuxUploaderDrop,
@@ -27,7 +26,7 @@ import UploaderOverlay from './UploaderOverlay';
  * 3. If 401: show login overlay, wait for auth, retry
  * 4. Upload begins with returned URL
  * 5. On success: poll for playback ID
- * 6. When ready: update renderer to 'mux-video', store playback ID in nanostore
+ * 6. When ready: update renderer to 'hls', store playback ID in nanostore
  */
 export default function MuxUploaderPanel() {
   // Local state for upload flow (not shared across islands)
@@ -40,7 +39,7 @@ export default function MuxUploaderPanel() {
   // Ref to store the promise resolver for login flow
   const loginResolverRef = useRef<((url: string) => void) | null>(null);
   // Ref to the MuxUploader element for dispatching reset events
-  const uploaderRef = useRef<MuxUploaderElement>(null);
+  const uploaderRef = useRef<HTMLElement>(null);
 
   /**
    * Endpoint function called by MuxUploader when file is selected.
@@ -158,7 +157,7 @@ export default function MuxUploaderPanel() {
     // Success! Update local state and nanostores (for cross-island use)
     setPlaybackId(result.playbackId);
     setState('ready');
-    renderer.set('mux-video');
+    renderer.set('hls');
     muxPlaybackId.set(result.playbackId);
     sourceUrl.set(`https://stream.mux.com/${result.playbackId}.m3u8`);
   }, [uploadId]);
@@ -178,6 +177,7 @@ export default function MuxUploaderPanel() {
   return (
     <div className="flex-1 relative rounded-xs border border-dashed border-light-40 overflow-hidden border-faded-black dark:border-manila-dark">
       <MuxUploader
+        // @ts-expect-error — MuxUploaderElement type not hoisted by pnpm; only used for dispatchEvent
         ref={uploaderRef}
         id="mux-uploader"
         className="hidden"
diff --git a/site/src/layouts/Docs.astro b/site/src/layouts/Docs.astro
index 2c565e28b..9d689decc 100644
--- a/site/src/layouts/Docs.astro
+++ b/site/src/layouts/Docs.astro
@@ -5,7 +5,6 @@ import DocsSidebar from '@/components/docs/DocsSidebar.astro';
 import DocsSidebarRestoration from '@/components/docs/DocsSidebarRestoration.astro';
 import { Selectors } from '@/components/docs/Selectors';
 import StyleInit from '@/components/docs/StyleInit.astro';
-import FilmGrain from '@/components/FilmGrain';
 import Footer from '@/components/FooterDocs.astro';
 import FooterEasterEgg from '@/components/FooterEasterEgg.astro';
 import NavBarDocs from '@/components/NavBar/NavBarDocs.astro';
diff --git a/site/src/pages/auth/success.astro b/site/src/pages/auth/success.astro
index 47749ea91..80ec16063 100644
--- a/site/src/pages/auth/success.astro
+++ b/site/src/pages/auth/success.astro
@@ -12,7 +12,7 @@ import AuthResult from '@/layouts/AuthResult.astro';
   <GetStartedLink
     slot="action"
     client:load
-    class="group inline-flex items-center gap-1 intent:underline"
+    className="group inline-flex items-center gap-1 intent:underline"
   >
     <ArrowLeft
       size="1em"
diff --git a/site/src/pages/docs/framework/[framework]/index.astro b/site/src/pages/docs/framework/[framework]/index.astro
index dd2de1caf..0bb1ba957 100644
--- a/site/src/pages/docs/framework/[framework]/index.astro
+++ b/site/src/pages/docs/framework/[framework]/index.astro
@@ -15,11 +15,9 @@ if (!isValidFramework(framework)) {
   return new Response('Not Found', { status: 404 });
 }
 
+// astro check can't see usage inside return statements in frontmatter (false positive ts(6133))
 const preferences = getPreferencesServer(Astro.cookies);
-const { url } = resolveIndexRedirect({
-  preferences,
-  params: { framework },
-});
+const { url } = resolveIndexRedirect({ preferences, params: { framework } });
 
 return Astro.redirect(url, 307);
 ---
diff --git a/site/src/pages/docs/framework/index.astro b/site/src/pages/docs/framework/index.astro
index 3f9736db9..5ae2df355 100644
--- a/site/src/pages/docs/framework/index.astro
+++ b/site/src/pages/docs/framework/index.astro
@@ -4,11 +4,9 @@ export const prerender = false; // since we're reading cookies
 import { getPreferencesServer } from '@/utils/docs/preferences';
 import { resolveIndexRedirect } from '@/utils/docs/routing';
 
+// astro check can't see usage inside return statements in frontmatter (false positive ts(6133))
 const preferences = getPreferencesServer(Astro.cookies);
-const { url } = resolveIndexRedirect({
-  preferences,
-  params: {},
-});
+const { url } = resolveIndexRedirect({ preferences, params: {} });
 
 return Astro.redirect(url, 307);
 ---
diff --git a/site/src/pages/docs/index.astro b/site/src/pages/docs/index.astro
index 3f9736db9..5ae2df355 100644
--- a/site/src/pages/docs/index.astro
+++ b/site/src/pages/docs/index.astro
@@ -4,11 +4,9 @@ export const prerender = false; // since we're reading cookies
 import { getPreferencesServer } from '@/utils/docs/preferences';
 import { resolveIndexRedirect } from '@/utils/docs/routing';
 
+// astro check can't see usage inside return statements in frontmatter (false positive ts(6133))
 const preferences = getPreferencesServer(Astro.cookies);
-const { url } = resolveIndexRedirect({
-  preferences,
-  params: {},
-});
+const { url } = resolveIndexRedirect({ preferences, params: {} });
 
 return Astro.redirect(url, 307);
 ---
diff --git a/site/src/pages/support.astro b/site/src/pages/support.astro
index 659ceea6b..6b85100e9 100644
--- a/site/src/pages/support.astro
+++ b/site/src/pages/support.astro
@@ -59,7 +59,7 @@ const tiles = [
             </h2>
             {Array.isArray(tile.body) ? (
               <div class="text-p2 text-warm-gray dark:text-manila-dark">
-                {tile.body.map((line, i) => (
+                {tile.body.map((line) => (
                   <p class="mb-2 last:mb-0">{line}</p>
                 ))}
               </div>
@@ -68,7 +68,7 @@ const tiles = [
                 {tile.body}
               </p>
             )}
-            {tile.cta.href ? (
+            {"href" in tile.cta ? (
               <a
                 href={tile.cta.href}
                 target="_blank"
diff --git a/site/src/utils/auth.ts b/site/src/utils/auth.ts
index 856230663..7868693ff 100644
--- a/site/src/utils/auth.ts
+++ b/site/src/utils/auth.ts
@@ -105,6 +105,7 @@ export function getJWKS() {
  * Decrypt and unseal session data from an encrypted cookie value
  */
 export async function unseal<T>(cookieValue: string): Promise<T> {
+  if (!SESSION_COOKIE_PASSWORD) throw new Error('SESSION_COOKIE_PASSWORD required');
   return unsealData<T>(cookieValue, {
     password: SESSION_COOKIE_PASSWORD,
   });
@@ -114,6 +115,7 @@ export async function unseal<T>(cookieValue: string): Promise<T> {
  * Encrypt and seal session data for secure cookie storage
  */
 export async function seal<T>(data: T): Promise<string> {
+  if (!SESSION_COOKIE_PASSWORD) throw new Error('SESSION_COOKIE_PASSWORD required');
   return sealData(data, {
     password: SESSION_COOKIE_PASSWORD,
     ttl: INACTIVITY_EXPIRY,
diff --git a/site/src/utils/componentReferenceModel.js b/site/src/utils/componentReferenceModel.ts
similarity index 56%
rename from site/src/utils/componentReferenceModel.js
rename to site/src/utils/componentReferenceModel.ts
index c5dfe63d9..ae65e45e3 100644
--- a/site/src/utils/componentReferenceModel.js
+++ b/site/src/utils/componentReferenceModel.ts
@@ -1,34 +1,66 @@
-/**
- * Centralized component API subsection definitions.
- *
- * Why this exists:
- * API reference headings are produced in two different places:
- * 1) rendered markup in ComponentReference.astro
- * 2) synthetic TOC metadata in remarkConditionalHeadings
- *
- * Historically each side computed ids/slugs independently, which caused drift
- * (TOC links diverging from rendered heading ids). Keeping subsection shape and
- * id pieces here makes both sides consume the same contract.
- */
-const API_REFERENCE_SUBSECTIONS = Object.freeze([
-  {
-    key: 'props',
-    title: 'Props',
-    singleId: 'props',
-    suffix: 'props',
-  },
-  {
-    key: 'state',
-    title: 'State',
-    singleId: 'state',
-    suffix: 'state',
-  },
-  {
-    key: 'dataAttributes',
-    title: 'Data attributes',
-    singleId: 'data-attributes',
-    suffix: 'data-attributes',
-  },
+import type { ComponentReference, PartReference } from '@/types/component-reference';
+import type { SupportedFramework } from '@/types/docs';
+
+export interface ApiReferenceSection {
+  key: string;
+  title: string;
+  id: string;
+  depth: number;
+  tocKind?: string;
+}
+
+export interface PartModel {
+  id: string;
+  name: string;
+  description: string | undefined;
+  componentName: string;
+  labelByFramework: { react: string; html: string };
+  frameworks: SupportedFramework[];
+  sections: ApiReferenceSection[];
+  data: PartReference;
+}
+
+interface ComponentReferenceModelBase {
+  componentName: string;
+  heading: { id: string; depth: number; text: string };
+  data: ComponentReference;
+}
+
+export interface MultiPartModel extends ComponentReferenceModelBase {
+  hasParts: true;
+  sections: [];
+  parts: PartModel[];
+}
+
+export interface SingleModel extends ComponentReferenceModelBase {
+  hasParts: false;
+  sections: ApiReferenceSection[];
+  parts: [];
+}
+
+export type ComponentReferenceModel = MultiPartModel | SingleModel;
+
+export interface TocHeading {
+  depth: number;
+  text: string;
+  slug: string;
+  frameworks?: SupportedFramework[];
+  tocKind?: string;
+}
+
+type SubsectionKey = 'props' | 'state' | 'dataAttributes' | 'cssCustomProperties';
+
+interface SubsectionDef {
+  key: SubsectionKey;
+  title: string;
+  singleId: string;
+  suffix: string;
+}
+
+const API_REFERENCE_SUBSECTIONS: readonly SubsectionDef[] = Object.freeze([
+  { key: 'props', title: 'Props', singleId: 'props', suffix: 'props' },
+  { key: 'state', title: 'State', singleId: 'state', suffix: 'state' },
+  { key: 'dataAttributes', title: 'Data attributes', singleId: 'data-attributes', suffix: 'data-attributes' },
   {
     key: 'cssCustomProperties',
     title: 'CSS custom properties',
@@ -39,11 +71,14 @@ const API_REFERENCE_SUBSECTIONS = Object.freeze([
 
 export const API_REFERENCE_SUBSECTION_TITLES = Object.freeze(API_REFERENCE_SUBSECTIONS.map((section) => section.title));
 
-function hasEntries(value) {
+function hasEntries(value: Record<string, unknown> | undefined): boolean {
   return Object.keys(value ?? {}).length > 0;
 }
 
-function createSections(source, options) {
+function createSections(
+  source: PartReference | ComponentReference,
+  options: { forPart: true; partId: string } | { forPart: false }
+): ApiReferenceSection[] {
   return API_REFERENCE_SUBSECTIONS.flatMap((definition) => {
     if (!hasEntries(source[definition.key])) {
       return [];
@@ -72,17 +107,11 @@ function createSections(source, options) {
   });
 }
 
-/**
- * Create a single source-of-truth model for API reference headings and sections.
- *
- * This model intentionally carries both:
- * - display concerns (heading text/depth/framework label)
- * - identity concerns (exact ids used by anchors + TOC entries)
- *
- * The shared model is what prevents anchor drift: ids are computed once and
- * reused verbatim by the renderer and the remark plugin.
- */
-export function createComponentReferenceModel(componentName, apiReference, partOrder) {
+export function createComponentReferenceModel(
+  componentName: string,
+  apiReference: ComponentReference | null,
+  partOrder?: string[]
+): ComponentReferenceModel | null {
   if (!apiReference) {
     return null;
   }
@@ -90,18 +119,18 @@ export function createComponentReferenceModel(componentName, apiReference, partO
   const hasParts = Boolean(apiReference.parts && Object.keys(apiReference.parts).length > 0);
 
   if (hasParts) {
-    let partEntries = Object.entries(apiReference.parts);
+    let partEntries = Object.entries(apiReference.parts!);
 
     if (partOrder) {
       const orderMap = new Map(partOrder.map((id, i) => [id, i]));
       partEntries = partEntries.slice().sort((a, b) => {
-        const ai = orderMap.has(a[0]) ? orderMap.get(a[0]) : Number.MAX_SAFE_INTEGER;
-        const bi = orderMap.has(b[0]) ? orderMap.get(b[0]) : Number.MAX_SAFE_INTEGER;
+        const ai = orderMap.has(a[0]) ? orderMap.get(a[0])! : Number.MAX_SAFE_INTEGER;
+        const bi = orderMap.has(b[0]) ? orderMap.get(b[0])! : Number.MAX_SAFE_INTEGER;
         return ai - bi;
       });
     }
 
-    const parts = partEntries.map(([partId, part]) => ({
+    const parts: PartModel[] = partEntries.map(([partId, part]) => ({
       id: partId,
       name: part.name,
       description: part.description,
@@ -110,7 +139,10 @@ export function createComponentReferenceModel(componentName, apiReference, partO
         react: part.name,
         html: part.platforms?.html?.tagName ?? part.name,
       },
-      frameworks: [...(part.platforms?.html ? ['html'] : []), ...(part.platforms?.react ? ['react'] : [])],
+      frameworks: [
+        ...(part.platforms?.html ? ['html' as const] : []),
+        ...(part.platforms?.react ? ['react' as const] : []),
+      ],
       sections: createSections(part, { forPart: true, partId }),
       data: part,
     }));
@@ -143,18 +175,12 @@ export function createComponentReferenceModel(componentName, apiReference, partO
   };
 }
 
-/**
- * Build TOC heading metadata from the shared API reference model.
- *
- * Important: this function does not slugify heading text. It uses model ids
- * directly, so TOC slugs are guaranteed to match rendered heading ids.
- */
-export function buildComponentReferenceTocHeadings(apiReferenceModel) {
+export function buildComponentReferenceTocHeadings(apiReferenceModel: ComponentReferenceModel | null): TocHeading[] {
   if (!apiReferenceModel) {
     return [];
   }
 
-  const headings = [
+  const headings: TocHeading[] = [
     {
       depth: apiReferenceModel.heading.depth,
       text: apiReferenceModel.heading.text,
diff --git a/site/src/utils/docs/renderInlineMarkdown.ts b/site/src/utils/docs/renderInlineMarkdown.ts
index 8bd00c553..2fe9cfa05 100644
--- a/site/src/utils/docs/renderInlineMarkdown.ts
+++ b/site/src/utils/docs/renderInlineMarkdown.ts
@@ -32,7 +32,7 @@ const renderer: MarkedExtension['renderer'] = {
   },
 
   listitem(item: Tokens.ListItem) {
-    let body = this.parser.parse(item.tokens, !!item.loose);
+    let body = this.parser.parse(item.tokens);
     if (!item.loose) {
       body = body.replace(/^<p class="[^"]*">/, '').replace(/<\/p>$/, '');
     }
diff --git a/site/src/utils/mux/__tests__/auth-flow.test.ts b/site/src/utils/mux/__tests__/auth-flow.test.ts
index 2104b47d7..76a8cf293 100644
--- a/site/src/utils/mux/__tests__/auth-flow.test.ts
+++ b/site/src/utils/mux/__tests__/auth-flow.test.ts
@@ -211,7 +211,7 @@ describe('initiateAuthPopup', () => {
 
 describe('createEndpointCoordinator', () => {
   it('returns URL immediately when authenticated', async () => {
-    const createUpload = vi.fn<[], Promise<CreateUploadResult>>().mockResolvedValue({
+    const createUpload = vi.fn<() => Promise<CreateUploadResult>>().mockResolvedValue({
       data: { uploadId: 'upload-1', uploadUrl: 'https://upload.mux.com/xyz' },
     });
 
@@ -229,7 +229,7 @@ describe('createEndpointCoordinator', () => {
 
   it('calls onStateChange with uploading when authenticated', async () => {
     const onStateChange = vi.fn();
-    const createUpload = vi.fn<[], Promise<CreateUploadResult>>().mockResolvedValue({
+    const createUpload = vi.fn<() => Promise<CreateUploadResult>>().mockResolvedValue({
       data: { uploadId: 'upload-1', uploadUrl: 'https://upload.mux.com/xyz' },
     });
 
@@ -248,13 +248,13 @@ describe('createEndpointCoordinator', () => {
   it('pauses on 401, waits for auth, then retries', async () => {
     let authCallback: (() => void) | null = null;
     const createUpload = vi
-      .fn<[], Promise<CreateUploadResult>>()
+      .fn<() => Promise<CreateUploadResult>>()
       .mockResolvedValueOnce({ error: { code: 'UNAUTHORIZED', message: 'Not authenticated' } })
       .mockResolvedValueOnce({
         data: { uploadId: 'upload-1', uploadUrl: 'https://upload.mux.com/xyz' },
       });
 
-    const initiateLogin = vi.fn<[], Promise<LoginResult>>().mockResolvedValue({
+    const initiateLogin = vi.fn<() => Promise<LoginResult>>().mockResolvedValue({
       data: { authorizationUrl: 'https://auth.example.com' },
     });
 
@@ -289,7 +289,7 @@ describe('createEndpointCoordinator', () => {
     let authCallback: (() => void) | null = null;
     const onStateChange = vi.fn();
     const createUpload = vi
-      .fn<[], Promise<CreateUploadResult>>()
+      .fn<() => Promise<CreateUploadResult>>()
       .mockResolvedValueOnce({ error: { code: 'UNAUTHORIZED', message: 'Not authenticated' } })
       .mockResolvedValueOnce({
         data: { uploadId: 'upload-1', uploadUrl: 'https://upload.mux.com/xyz' },
@@ -297,7 +297,7 @@ describe('createEndpointCoordinator', () => {
 
     const coordinator = createEndpointCoordinator({
       createUpload,
-      initiateLogin: vi.fn<[], Promise<LoginResult>>().mockResolvedValue({
+      initiateLogin: vi.fn<() => Promise<LoginResult>>().mockResolvedValue({
         data: { authorizationUrl: 'https://auth.example.com' },
       }),
       openAuthPopup: (_url: string, onComplete: () => void) => {
@@ -318,7 +318,7 @@ describe('createEndpointCoordinator', () => {
   });
 
   it('propagates non-401 errors', async () => {
-    const createUpload = vi.fn<[], Promise<CreateUploadResult>>().mockResolvedValue({
+    const createUpload = vi.fn<() => Promise<CreateUploadResult>>().mockResolvedValue({
       error: { code: 'INTERNAL_SERVER_ERROR', message: 'Server error' },
     });
 
@@ -332,11 +332,11 @@ describe('createEndpointCoordinator', () => {
   });
 
   it('propagates login initiation errors', async () => {
-    const createUpload = vi.fn<[], Promise<CreateUploadResult>>().mockResolvedValue({
+    const createUpload = vi.fn<() => Promise<CreateUploadResult>>().mockResolvedValue({
       error: { code: 'UNAUTHORIZED', message: 'Not authenticated' },
     });
 
-    const initiateLogin = vi.fn<[], Promise<LoginResult>>().mockResolvedValue({
+    const initiateLogin = vi.fn<() => Promise<LoginResult>>().mockResolvedValue({
       error: { message: 'OAuth configuration missing' },
     });
 
@@ -352,13 +352,13 @@ describe('createEndpointCoordinator', () => {
   it('propagates errors from retry after auth', async () => {
     let authCallback: (() => void) | null = null;
     const createUpload = vi
-      .fn<[], Promise<CreateUploadResult>>()
+      .fn<() => Promise<CreateUploadResult>>()
       .mockResolvedValueOnce({ error: { code: 'UNAUTHORIZED', message: 'Not authenticated' } })
       .mockResolvedValueOnce({ error: { code: 'INTERNAL_SERVER_ERROR', message: 'Server exploded' } });
 
     const coordinator = createEndpointCoordinator({
       createUpload,
-      initiateLogin: vi.fn<[], Promise<LoginResult>>().mockResolvedValue({
+      initiateLogin: vi.fn<() => Promise<LoginResult>>().mockResolvedValue({
         data: { authorizationUrl: 'https://auth.example.com' },
       }),
       openAuthPopup: (_url: string, onComplete: () => void) => {
diff --git a/site/src/utils/mux/__tests__/polling.test.ts b/site/src/utils/mux/__tests__/polling.test.ts
index dfd55ceb8..05901ebbd 100644
--- a/site/src/utils/mux/__tests__/polling.test.ts
+++ b/site/src/utils/mux/__tests__/polling.test.ts
@@ -6,12 +6,12 @@ describe('pollForPlaybackId', () => {
   describe('successful flow', () => {
     it('polls until assetId is available, then polls until playbackId', async () => {
       const getUploadStatus = vi
-        .fn<[string], Promise<UploadStatusResult>>()
+        .fn<(id: string) => Promise<UploadStatusResult>>()
         .mockResolvedValueOnce({ data: { status: 'waiting' } })
         .mockResolvedValueOnce({ data: { status: 'asset_created', assetId: 'asset-1' } });
 
       const getAssetStatus = vi
-        .fn<[string], Promise<AssetStatusResult>>()
+        .fn<(id: string) => Promise<AssetStatusResult>>()
         .mockResolvedValueOnce({ data: { status: 'preparing' } })
         .mockResolvedValueOnce({ data: { status: 'ready', playbackId: 'playback-1' } });
 
@@ -31,11 +31,11 @@ describe('pollForPlaybackId', () => {
 
     it('returns immediately when assetId is available on first poll', async () => {
       const getUploadStatus = vi
-        .fn<[string], Promise<UploadStatusResult>>()
+        .fn<(id: string) => Promise<UploadStatusResult>>()
         .mockResolvedValue({ data: { status: 'asset_created', assetId: 'asset-1' } });
 
       const getAssetStatus = vi
-        .fn<[string], Promise<AssetStatusResult>>()
+        .fn<(id: string) => Promise<AssetStatusResult>>()
         .mockResolvedValue({ data: { status: 'ready', playbackId: 'playback-1' } });
 
       const result = await pollForPlaybackId({
@@ -54,7 +54,7 @@ describe('pollForPlaybackId', () => {
   describe('error handling', () => {
     it('returns error when upload status is errored', async () => {
       const getUploadStatus = vi
-        .fn<[string], Promise<UploadStatusResult>>()
+        .fn<(id: string) => Promise<UploadStatusResult>>()
         .mockResolvedValue({ data: { status: 'errored' } });
 
       const result = await pollForPlaybackId({
@@ -69,11 +69,11 @@ describe('pollForPlaybackId', () => {
 
     it('returns error when asset status is errored', async () => {
       const getUploadStatus = vi
-        .fn<[string], Promise<UploadStatusResult>>()
+        .fn<(id: string) => Promise<UploadStatusResult>>()
         .mockResolvedValue({ data: { status: 'asset_created', assetId: 'asset-1' } });
 
       const getAssetStatus = vi
-        .fn<[string], Promise<AssetStatusResult>>()
+        .fn<(id: string) => Promise<AssetStatusResult>>()
         .mockResolvedValue({ data: { status: 'errored' } });
 
       const result = await pollForPlaybackId({
@@ -88,7 +88,7 @@ describe('pollForPlaybackId', () => {
 
     it('returns error when getUploadStatus API call fails', async () => {
       const getUploadStatus = vi
-        .fn<[string], Promise<UploadStatusResult>>()
+        .fn<(id: string) => Promise<UploadStatusResult>>()
         .mockResolvedValue({ error: { message: 'Network error' } });
 
       const result = await pollForPlaybackId({
@@ -103,11 +103,11 @@ describe('pollForPlaybackId', () => {
 
     it('returns error when getAssetStatus API call fails', async () => {
       const getUploadStatus = vi
-        .fn<[string], Promise<UploadStatusResult>>()
+        .fn<(id: string) => Promise<UploadStatusResult>>()
         .mockResolvedValue({ data: { status: 'asset_created', assetId: 'asset-1' } });
 
       const getAssetStatus = vi
-        .fn<[string], Promise<AssetStatusResult>>()
+        .fn<(id: string) => Promise<AssetStatusResult>>()
         .mockResolvedValue({ error: { message: 'Asset not found' } });
 
       const result = await pollForPlaybackId({
@@ -139,7 +139,7 @@ describe('pollForPlaybackId', () => {
 
     it('throws when signal is aborted during upload status polling', async () => {
       const controller = new AbortController();
-      const getUploadStatus = vi.fn<[string], Promise<UploadStatusResult>>().mockImplementation(async () => {
+      const getUploadStatus = vi.fn<(id: string) => Promise<UploadStatusResult>>().mockImplementation(async () => {
         controller.abort();
         return { data: { status: 'waiting' } };
       });
@@ -158,10 +158,10 @@ describe('pollForPlaybackId', () => {
     it('throws when signal is aborted during asset status polling', async () => {
       const controller = new AbortController();
       const getUploadStatus = vi
-        .fn<[string], Promise<UploadStatusResult>>()
+        .fn<(id: string) => Promise<UploadStatusResult>>()
         .mockResolvedValue({ data: { status: 'asset_created', assetId: 'asset-1' } });
 
-      const getAssetStatus = vi.fn<[string], Promise<AssetStatusResult>>().mockImplementation(async () => {
+      const getAssetStatus = vi.fn<(id: string) => Promise<AssetStatusResult>>().mockImplementation(async () => {
         controller.abort();
         return { data: { status: 'preparing' } };
       });
diff --git a/site/src/utils/tests/componentReferenceModel.test.ts b/site/src/utils/tests/componentReferenceModel.test.ts
index d1b9e47c8..11d23d019 100644
--- a/site/src/utils/tests/componentReferenceModel.test.ts
+++ b/site/src/utils/tests/componentReferenceModel.test.ts
@@ -1,4 +1,5 @@
 import { describe, expect, it } from 'vitest';
+import type { ComponentReference } from '@/types/component-reference';
 import { buildComponentReferenceTocHeadings, createComponentReferenceModel } from '../componentReferenceModel';
 
 describe('createComponentReferenceModel', () => {
@@ -16,8 +17,9 @@ describe('createComponentReferenceModel', () => {
         },
       },
       dataAttributes: {},
+      cssCustomProperties: {},
       platforms: {},
-    };
+    } as ComponentReference;
 
     const model = createComponentReferenceModel('PlayButton', apiReference);
 
diff --git a/site/src/utils/tests/utilReferenceModel.test.ts b/site/src/utils/tests/utilReferenceModel.test.ts
index d42059b4b..ba855d4bd 100644
--- a/site/src/utils/tests/utilReferenceModel.test.ts
+++ b/site/src/utils/tests/utilReferenceModel.test.ts
@@ -1,4 +1,5 @@
 import { describe, expect, it } from 'vitest';
+import type { UtilReference } from '@/types/util-reference';
 import { buildUtilReferenceTocHeadings, createUtilReferenceModel } from '../utilReferenceModel';
 
 describe('createUtilReferenceModel', () => {
@@ -15,10 +16,14 @@ describe('createUtilReferenceModel', () => {
           returnValue: { type: 'Media | null' },
         },
       ],
-    };
+    } as UtilReference;
 
     const model = createUtilReferenceModel('useMedia', ref);
 
+    expect(model).not.toBeNull();
+    if (!model) return;
+    if (model.isMultiOverload) return;
+
     expect(model).toMatchObject({
       isMultiOverload: false,
       heading: { id: 'api-reference', depth: 2, text: 'API Reference' },
@@ -39,10 +44,14 @@ describe('createUtilReferenceModel', () => {
           returnValue: { type: 'UseButtonReturnValue' },
         },
       ],
-    };
+    } as UtilReference;
 
     const model = createUtilReferenceModel('useButton', ref);
 
+    expect(model).not.toBeNull();
+    if (!model) return;
+    if (model.isMultiOverload) return;
+
     expect(model.isMultiOverload).toBe(false);
     expect(model.sections).toEqual([
       { key: 'parameters', title: 'Parameters', id: 'parameters', depth: 3 },
@@ -67,10 +76,14 @@ describe('createUtilReferenceModel', () => {
           returnValue: { type: 'R' },
         },
       ],
-    };
+    } as UtilReference;
 
     const model = createUtilReferenceModel('usePlayer', ref);
 
+    expect(model).not.toBeNull();
+    if (!model) return;
+    if (!model.isMultiOverload) return;
+
     expect(model.isMultiOverload).toBe(true);
     expect(model.overloads).toHaveLength(2);
 
@@ -106,10 +119,14 @@ describe('createUtilReferenceModel', () => {
           returnValue: { type: 'AudioPlayer' },
         },
       ],
-    };
+    } as UtilReference;
 
     const model = createUtilReferenceModel('createPlayer', ref);
 
+    expect(model).not.toBeNull();
+    if (!model) return;
+    if (!model.isMultiOverload) return;
+
     expect(model.isMultiOverload).toBe(true);
     expect(model.overloads[0]).toMatchObject({
       id: 'video',
@@ -145,10 +162,14 @@ describe('createUtilReferenceModel', () => {
           returnValue: { type: 'R' },
         },
       ],
-    };
+    } as UtilReference;
 
     const model = createUtilReferenceModel('useStore', ref);
 
+    expect(model).not.toBeNull();
+    if (!model) return;
+    if (!model.isMultiOverload) return;
+
     expect(model.overloads[0]).toMatchObject({ id: 'overload-1', label: undefined });
     expect(model.overloads[1]).toMatchObject({ id: 'selector', label: 'Selector' });
   });
@@ -168,7 +189,7 @@ describe('buildUtilReferenceTocHeadings', () => {
           returnValue: { type: 'UseButtonReturnValue' },
         },
       ],
-    };
+    } as UtilReference;
 
     const model = createUtilReferenceModel('useButton', ref);
     const headings = buildUtilReferenceTocHeadings(model);
@@ -198,7 +219,7 @@ describe('buildUtilReferenceTocHeadings', () => {
           returnValue: { type: 'R' },
         },
       ],
-    };
+    } as UtilReference;
 
     const model = createUtilReferenceModel('useStore', ref);
     const headings = buildUtilReferenceTocHeadings(model);
@@ -229,7 +250,7 @@ describe('buildUtilReferenceTocHeadings', () => {
           returnValue: { type: 'AudioPlayer' },
         },
       ],
-    };
+    } as UtilReference;
 
     const model = createUtilReferenceModel('createPlayer', ref);
     const headings = buildUtilReferenceTocHeadings(model);
diff --git a/site/src/utils/utilReferenceModel.js b/site/src/utils/utilReferenceModel.ts
similarity index 61%
rename from site/src/utils/utilReferenceModel.js
rename to site/src/utils/utilReferenceModel.ts
index 72cbf6b3d..b18fb998e 100644
--- a/site/src/utils/utilReferenceModel.js
+++ b/site/src/utils/utilReferenceModel.ts
@@ -1,19 +1,48 @@
-/**
- * Centralized util API subsection definitions.
- *
- * Mirrors componentReferenceModel.js for utility APIs (hooks, controllers,
- * mixins, factories, contexts, utilities). Produces heading/id data consumed
- * by both UtilReference.astro and remarkConditionalHeadings.
- */
 import { kebabCase } from 'es-toolkit/string';
+import type { UtilOverload, UtilReference } from '@/types/util-reference';
 
-/**
- * Create a single source-of-truth model for util reference headings and sections.
- *
- * Single-overload: Parameters (H3) + Return Value (H3)
- * Multi-overload:  Overload N (H3) → Parameters (H4) + Return Value (H4)
- */
-export function createUtilReferenceModel(name, ref) {
+export interface UtilReferenceSection {
+  key: 'parameters' | 'returnValue';
+  title: string;
+  id: string;
+  depth: number;
+}
+
+export interface OverloadModel {
+  id: string;
+  label: string | undefined;
+  index: number;
+  description: string | undefined;
+  sections: UtilReferenceSection[];
+  data: UtilOverload;
+}
+
+interface Heading {
+  id: string;
+  depth: number;
+  text: string;
+}
+
+export interface SingleOverloadModel {
+  name: string;
+  description: string | undefined;
+  isMultiOverload: false;
+  heading: Heading;
+  sections: UtilReferenceSection[];
+  overload: UtilOverload;
+}
+
+export interface MultiOverloadModel {
+  name: string;
+  description: string | undefined;
+  isMultiOverload: true;
+  heading: Heading;
+  overloads: OverloadModel[];
+}
+
+export type UtilReferenceModel = SingleOverloadModel | MultiOverloadModel;
+
+export function createUtilReferenceModel(name: string, ref: UtilReference | null): UtilReferenceModel | null {
   if (!ref) {
     return null;
   }
@@ -21,10 +50,10 @@ export function createUtilReferenceModel(name, ref) {
   const isMultiOverload = ref.overloads.length > 1;
 
   if (isMultiOverload) {
-    const overloads = ref.overloads.map((overload, index) => {
+    const overloads = ref.overloads.map((overload, index): OverloadModel => {
       const label = overload.label;
       const overloadId = label ? kebabCase(label) : `overload-${index + 1}`;
-      const sections = [];
+      const sections: UtilReferenceSection[] = [];
 
       if (Object.keys(overload.parameters).length > 0) {
         sections.push({
@@ -65,8 +94,8 @@ export function createUtilReferenceModel(name, ref) {
     };
   }
 
-  const overload = ref.overloads[0];
-  const sections = [];
+  const overload = ref.overloads[0]!;
+  const sections: UtilReferenceSection[] = [];
 
   if (Object.keys(overload.parameters).length > 0) {
     sections.push({
@@ -98,15 +127,14 @@ export function createUtilReferenceModel(name, ref) {
   };
 }
 
-/**
- * Build TOC heading metadata from the shared util reference model.
- */
-export function buildUtilReferenceTocHeadings(model) {
+export function buildUtilReferenceTocHeadings(
+  model: UtilReferenceModel | null
+): Array<{ depth: number; text: string; slug: string }> {
   if (!model) {
     return [];
   }
 
-  const headings = [
+  const headings: Array<{ depth: number; text: string; slug: string }> = [
     {
       depth: model.heading.depth,
       text: model.heading.text,
diff --git a/site/tsconfig.json b/site/tsconfig.json
index 3246704e6..5eefea30b 100644
--- a/site/tsconfig.json
+++ b/site/tsconfig.json
@@ -3,7 +3,7 @@
   "compilerOptions": {
     "jsx": "react-jsx",
     "jsxImportSource": "react",
-    "lib": ["ES2020", "DOM", "DOM.Iterable"],
+    "lib": ["ES2022", "DOM", "DOM.Iterable"],
     "baseUrl": ".",
     "paths": {
       "@/*": ["src/*"]
diff --git a/site/vitest.config.ts b/site/vitest.config.ts
index e7c99f526..0b8c308f0 100644
--- a/site/vitest.config.ts
+++ b/site/vitest.config.ts
@@ -3,6 +3,7 @@ import react from '@vitejs/plugin-react';
 import { getViteConfig } from 'astro/config';
 
 export default getViteConfig({
+  // @ts-expect-error — Astro 5 uses Vite 6 types, but @vitejs/plugin-react ships Vite 8 types. Compatible at runtime.
   plugins: [react()],
   test: {
     globals: true,