docs: update watching documentation (#3440)

Also: fix a bug with autosave override not being respected by the
frontend.

For docs:

* Promote to a top-level nav item, and rename to "Using your own editor"
* Other small edits.

---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Myles Scolnick <myles@marimo.io>

docs/guides/editor_features/watching.md

@@ -1,29 +1,47 @@
-# Watching notebooks
+# Using your own editor
 
-marimo's `--watch` flag enables a file watcher that automatically sync your
-notebook file with the marimo editor or running application.
-
-This allows you to edit your notebook file in the editor of your choice, and
-have the changes automatically reflected in the running editor or application.
+While we recommend using the [marimo editor](editor_features/index.md),
+we understand that you may prefer to use your own editor. marimo provides a
+`--watch` flag that watches your notebook file for changes, syncing them to
+the marimo editor or running application. This lets you to edit your notebook
+using an editor of your choice, like neovim, VSCode, Cursor, or PyCharm, and
+have the changes automatically reflected in your browser.
 
 !!! tip "Install watchdog for better file watching"
-    For better file watching performance, install watchdog with `pip install watchdog`. Without watchdog, marimo will poll for file changes which is less efficient.
+    For better performance, install [watchdog](https://pypi.org/project/watchdog/).
+    Without watchdog, marimo resorts to polling.
+
+## `marimo edit --watch`
+
+When you run `marimo edit` with the `--watch` flag, the marimo server
+will open your notebook in the browser and watch the underlying notebook
+file for changes. When you make changes to the notebook file, they will be
+streamed to the marimo editor in the browser.
+
+Synced code will not be executed automatically, with cells marked as stale instead.
+Run all stale cells with the marimo editor's "Run" button, or the [`runStale`
+hotkey](hotkeys.md), to see the new outputs.
+
+!!! note "Cell signature and returns"
+    Don't worry about maintaining the signatures of cells and their return
+    values; marimo will handle this for you.
 
 ## `marimo run --watch`
 
 When you run a notebook with the `--watch` flag, whenever the file watcher
-detects a change to the notebook file, the application will be refreshed.
-The browser will trigger a page refresh to ensure your notebook starts from a fresh state.
-
-## `marimo watch --watch`
+detects a change to the notebook file, the application will be refreshed. The
+browser will trigger a page refresh to ensure your notebook starts from a fresh
+state.
 
-When you edit a notebook file with the `--watch` flag, whenever the file watcher
-detects a change to the notebook file, the new cells and code changes will be streamed to
-the browser editor.
+## Watching for changes to other modules
 
-This code will not be executed until you run the cell, and instead marked as stale.
+marimo can also watch for changes to Python modules that your notebook imports,
+letting you edit auxiliary Python files in your own editor as well. Learn how
+to enable this feature in our [Module Autoreloading
+Guide](module_autoreloading.md)
 
 ## Watching for data changes
 
 !!! note
     Support for watching data files and automatically refreshing cells that depend on them is coming soon. Follow along at <https://github.com/marimo-team/marimo/issues/3258>
+

frontend/src/core/config/config.ts

@@ -38,7 +38,7 @@ export const hotkeysAtom = atom((get) => {
 });
 
 export const autoSaveConfigAtom = atom((get) => {
-  return get(userConfigAtom).save;
+  return get(resolvedMarimoConfigAtom).save;
 });
 
 /**

mkdocs.yml

@@ -93,8 +93,8 @@ nav:
           - AI completion: guides/editor_features/ai_completion.md
           - Package management: guides/editor_features/package_management.md
           - Module autoreloading: guides/editor_features/module_autoreloading.md
-          - Watching notebooks: guides/editor_features/watching.md
           - Hotkeys: guides/editor_features/hotkeys.md
+      - Using your own editor: guides/editor_features/watching.md
       - Run notebooks as apps: guides/apps.md
       - Run notebooks as scripts: guides/scripts.md
       - Test notebooks: