apply design-token markdown styling

package-lock.json

@@ -12,6 +12,7 @@
         "@kobalte/core": "0.13.11",
         "@opencode-ai/sdk": "0.15.13",
         "@solidjs/router": "^0.13.0",
+        "github-markdown-css": "^5.8.1",
         "ignore": "7.0.5",
         "lucide-solid": "^0.300.0",
         "marked": "^12.0.0",
@@ -4499,6 +4500,18 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
     },
+    "node_modules/github-markdown-css": {
+      "version": "5.8.1",
+      "resolved": "https://registry.npmjs.org/github-markdown-css/-/github-markdown-css-5.8.1.tgz",
+      "integrity": "sha512-8G+PFvqigBQSWLQjyzgpa2ThD9bo7+kDsriUIidGcRhXgmcaAWUIpCZf8DavJgc+xifjbCG+GvMyWr0XMXmc7g==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=10"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
+      }
+    },
     "node_modules/glob": {
       "version": "7.2.3",
       "resolved": "https://registry.npmjs.org/glob/-/glob-7.2.3.tgz",