v0.3.1: fix: update smoke test for the 19-tool set; bump to 0.3.1

Fixed

• Release pipeline: the MCP server's smoke test still expected the 15-tool
  set and failed prepublishOnly for tauri-plugin-mcp-server@0.3.0 (the
  guest package published fine). Expectations now cover all 19 tools and the
  new click/query_page params. No functional changes.