fix(build): raise host compiler heap ceiling

package.json

@@ -20,7 +20,7 @@
     "build": "tsx scripts/build.ts",
     "build:official": "tsx scripts/build.ts --profile official",
     "build:lib": "npm run build:lib:host && npm run build:lib:client",
-    "build:lib:host": "tsc -b tsconfig.host.json && tsdown --env.DSH_BUILD_FACE host",
+    "build:lib:host": "node --max-old-space-size=4096 ./node_modules/typescript/bin/tsc -b tsconfig.host.json && tsdown --env.DSH_BUILD_FACE host",
     "build:lib:client": "tsc -b tsconfig.client.json && tsdown --env.DSH_BUILD_FACE client",
     "build:web": "pnpm --filter @deepseek-ai/dsh-web-frontend run build",
     "clean": "tsx scripts/clean.ts",