Make plotly-cloud a default install dependency

CHANGELOG.md

@@ -5,6 +5,7 @@ This project adheres to [Semantic Versioning](https://semver.org/).
 ## [Unreleased]
 
 ### Added
+- [] Make `plotly-cloud` a default install dependency of Dash instead of an optional extra, so the `plotly` CLI and Dash's cloud integration are available out of the box. The `dash[cloud]` extra is kept for backward compatibility. Closes [#3513](https://github.com/plotly/dash/issues/3513).
 - [#3646](https://github.com/plotly/dash/pull/3646) Experimental support for React 19. The default is still React 18.3.1; to use React 19 set the environment variable `REACT_VERSION=19.2.4` before running your app, or call `dash._dash_renderer._set_react_version("19.2.4")` inside the app. React 19 has no official UMD builds, so Dash serves the [`umd-react`](https://www.npmjs.com/package/umd-react) package, together with a compatibility shim loaded after react-dom and before any component package. The shim keeps component libraries built against React <=18 (e.g. dash-bootstrap-components, dash-mantine-components) working under React 19: it stubs the removed `ReactCurrentOwner` internals, redirects the legacy element `$$typeof` symbol so pre-bundled React 18 jsx-runtimes produce elements React 19 accepts (error #525), and exposes a global `react/jsx-runtime` (`window.ReactJSXRuntime`) that Dash's own component bundles externalize to. Component library authors adopting this convention should copy the defensive `jsxRuntimeExternal` webpack external from `components/dash-core-components/webpack.config.js` rather than a bare `'ReactJSXRuntime'` string: it falls back to a `React.createElement`-based runtime when the global is missing, so the same build also works on Dash versions older than this release.
 
 ### Removed

dash/_plotly_cli.py

@@ -9,7 +9,8 @@ def cli():
     except ImportError:
         print(
             "Plotly cloud is not installed,"
-            " install it with `pip install dash[cloud]` to use the plotly command",
+            " install it with `pip install plotly-cloud` (or reinstall dash)"
+            " to use the plotly command",
             file=sys.stderr,
         )
         sys.exit(-1)

requirements/install.txt

@@ -1,6 +1,7 @@
 Flask>=1.0.4,<3.2
 Werkzeug<3.2
 plotly>=5.0.0
+plotly-cloud
 importlib-metadata
 typing_extensions>=4.1.1
 requests