fix(dev): build runtime-host in the desktop library graph

npm run dev only tsc --build tsconfig.lib.json. After the Runtime Host
cutover, desktop main imports @maka/runtime-host/protocol at runtime, but
that package was missing from the lib graph — stale dist then crashed
Electron with missing named exports such as
decodeExternalSessionCatalogQueryInput.

tsconfig.lib.json

diff --git a/tsconfig.lib.json b/tsconfig.lib.json
index dc6c2fc..727d9b8 100644
--- a/tsconfig.lib.json
+++ b/tsconfig.lib.json
@@ -5,6 +5,7 @@
     { "path": "packages/storage" },
     { "path": "packages/mcp" },
     { "path": "packages/runtime" },
+    { "path": "packages/runtime-host" },
     { "path": "packages/computer-use" },
     { "path": "packages/ui" }
   ]