test(cli): cover Harness-home credential loading in built entry

Source-level environment and credential tests prove the individual loaders, but they do not prove that the published launcher runs them before Loader evaluates a shipped profile.

Start the built dsh binary with the shipped base bundle and a test-only LLM probe. Put the endpoint in $DSH_HOME/.env, put the bearer token only in $DSH_HOME/.credentials.yaml, remove inherited DeepSeek overrides, and assert the mock request received both without leaking the token. This covers launch order, profile composition, the adapter, and the credential seam without a real API.

apps/cli/package.json

@@ -39,6 +39,7 @@
     "@deepseek-ai/dsh-frontend-static": "workspace:^",
     "@deepseek-ai/dsh-host-apiproxy": "workspace:^",
     "@deepseek-ai/dsh-host-webserver": "workspace:^",
+    "@deepseek-ai/dsh-llm-mock-server": "workspace:^",
     "@deepseek-ai/dsh-loader-smoke": "workspace:^",
     "@deepseek-ai/dsh-system-prompt": "workspace:^",
     "@deepseek-ai/dsh-tools": "workspace:^",