Adding blog post on A2UI client side functions

[sfshaza2]

As it says. Waiting for header image.

[gemini-code-assist]

Code Review

This pull request introduces a new blog post explaining how to use A2UI's client-side functions to delegate local operations to Dart code on a user's device. The review feedback identifies several syntax and formatting issues within the markdown file, including an invalid Dart enum reference in a code snippet, a missing backtick, a typo in 'executeSync', an empty markdown link, and a broken link syntax at the end of the document.

[flutter-website-bot]

Staged preview of the updated docs.flutter.dev site (updated for commit 9a06658):

https://flutter-docs-prod--docs-pr13794-a2ui-client-side-funct-0p1n6v0y.web.app

[gemini-code-assist]

Code Review

This pull request adds a new blog post detailing how to use A2UI's client-side functions in Flutter to run local operations on a user's device. The review feedback points out two key improvements: changing a Mermaid diagram's code block label from dart to mermaid to ensure correct rendering, and updating the validation logic in the Dart code snippet to check for quantity <= 0 instead of quantity < 1 so that fractional quantities are handled correctly.

[gemini-code-assist]

The code block contains a Mermaid sequence diagram, but it is labeled as dart. Changing the language identifier to mermaid will enable proper rendering in markdown viewers that support Mermaid diagrams.

[gemini-code-assist]

In a kitchen/catering context, ingredients are often measured in fractional quantities (e.g., 0.5 cups, 1.5 lbs). Checking quantity < 1 will incorrectly return $0.00 for any fractional quantity less than 1. Consider checking quantity <= 0 instead.

Suggested change

	if (quantity == null || quantity < 1) {
	return '\$0.00';
	}
	if (quantity == null || quantity <= 0) {
	return '\$0.00';
	}