fix(web): resolve TS2882 for fontsource side-effect import in Docker build

Move @fontsource-variable/jetbrains-mono from root to web package and
add module declaration in vite-env.d.ts for TypeScript 6.0 compatibility.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: finch-xu

package-lock.json

@@ -4,7 +4,5 @@
   "workspaces": [
     "packages/*"
   ],
-  "dependencies": {
-    "@fontsource-variable/jetbrains-mono": "^5.2.8"
-  }
+  "dependencies": {}
 }

package.json

@@ -10,6 +10,7 @@
     "preview": "vite preview"
   },
   "dependencies": {
+    "@fontsource-variable/jetbrains-mono": "^5.2.8",
     "ghostty-web": "^0.4.0",
     "react": "^19.2.4",
     "react-dom": "^19.2.4"

packages/web/package.json

@@ -0,0 +1,3 @@
+/// <reference types="vite/client" />
+
+declare module '@fontsource-variable/jetbrains-mono';