chore!: Make app_opts() args into kwargs (#1895)

Author: schloerke

CHANGELOG.md

@@ -9,6 +9,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Changes
 
+* Express mode's `app_opts()` requires all arguments to be keyword-only. If you are using positional arguments, you will need to update your code. (#1895)
+
 * The `.get_latest_stream_result()` method on `ui.MarkdownStream()` was deprecated in favor of the new `.latest_stream` property. Call `.result()` on the property to get the latest result, `.status` to check the status, and `.cancel()` to cancel the stream.
 
 ### Bug fixes

shiny/express/_run.py

@@ -295,6 +295,7 @@ class AppOpts(TypedDict):
 
 @no_example()
 def app_opts(
+    *,
     static_assets: str | Path | Mapping[str, str | Path] | MISSING_TYPE = MISSING,
     debug: bool | MISSING_TYPE = MISSING,
 ):

tests/playwright/shiny/components/chat/icon/app.py

@@ -7,7 +7,7 @@
 
 ui.page_opts(title="Chat Icons")
 
-app_opts({"/img": Path(__file__).parent / "img"})
+app_opts(static_assets={"/img": Path(__file__).parent / "img"})
 
 with ui.layout_columns():
     # Default Bot ---------------------------------------------------------------------