Ai cleanup redirects (#13270)

Cleanup for the new AI section.

## Presubmit checklist

- [X] If you are unwilling, or unable, to sign the CLA, even for a
_tiny_, one-word PR, please file an issue instead of a PR.
- [X] If this PR is not meant to land until a future stable release,
mark it as draft with an explanation.
- [X] This PR follows the [Google Developer Documentation Style
Guidelines](https://developers.google.com/style)—for example, it doesn't
use _i.e._ or _e.g._, and it avoids _I_ and _we_ (first-person
pronouns).
- [X] This PR uses [semantic line
breaks](https://github.com/dart-lang/site-shared/blob/main/doc/writing-for-dart-and-flutter-websites.md#semantic-line-breaks)
  of 80 characters or fewer.

Author: lamek

firebase.json

@@ -35,6 +35,9 @@
       { "source": "/ai-toolkit/:rest*", "destination": "/ai/ai-toolkit/:rest*", "type": 301 },
       { "source": "/ai/flutter-ext-for-gemini", "destination": "/ai/gemini-cli-extension", "type": 301 },
       { "source": "/ai/best-practices/tool-calls-aka-function-calls", "destination": "/ai/best-practices/tool-calls", "type": 301 },
+      { "source": "/ai/antigravity", "destination": "/ai/coding-assistants", "type": 301 },
+      { "source": "/ai/gemini-code-assist", "destination": "/ai/coding-assistants", "type": 301 },
+      { "source": "/ai/firebase-ai-logic", "destination": "https://firebase.google.com/docs/ai-logic/get-started?platform=flutter", "type": 301 },
       { "source": "/android-release", "destination": "/deployment/android", "type": 301 },
       { "source": "/animations", "destination": "/ui/animations", "type": 301 },
       { "source": "/animations/:rest*", "destination": "/ui/animations/:rest*", "type": 301 },

site/lib/src/layouts/dash_layout.dart

@@ -157,7 +157,10 @@ ga('send', 'pageview');
     final bodyClass = pageData['bodyClass'] as String?;
     final pageUrl = page.url.startsWith('/') ? page.url : '/${page.url}';
 
-    final pageSidenav = pageData['sidenav'] as String? ?? defaultSidenav;
+    final pageSidenavRaw = pageData['sidenav'];
+    final pageSidenav = pageSidenavRaw is String
+        ? pageSidenavRaw
+        : defaultSidenav;
     final sideNavEntries = switch (page.data['sidenav']) {
       _ when pageSidenav == 'ai' => switch (page.data['ai']) {
         final List<Object?> sidenavData => navEntriesFromData(sidenavData),

src/content/ai/coding-assistants.md

@@ -6,7 +6,11 @@ description: >
   to accelerate your Flutter development.
 ---
 
-AI tools are not only features in your app, but can also be powerful assistants in your development workflow. Tools like Antigravity and Gemini CLI can help you write code faster, understand complex concepts, and reduce boilerplate.
+AI tools are not only features in your app,
+but can also be powerful assistants in your development workflow.
+
+Tools like Antigravity and Gemini CLI can help you write code faster,
+understand complex concepts, and reduce boilerplate.
 
 ## Antigravity
 

src/content/ai/create-with-ai.md

@@ -11,18 +11,24 @@ This guide covers how you can leverage AI tools to build AI-powered
 features for your Flutter apps and streamline your
 Flutter and Dart development.
 
-## Overview
-
-AI can be used for building AI-powered apps with Flutter and for accelerating
-your development workflow. You can integrate AI-powered features like natural
-language understanding and content generation directly into your Flutter app
-using powerful SDKs, like the Firebase SDK for Generative AI. You can also use
-AI tools, such as Gemini Code Assist and Gemini CLI, to help with code
-generation and scaffolding. These tools are powered by the Dart and Flutter MCP
-server, which provides AI with a rich context about your codebase. The Flutter
-Extension for Gemini CLI makes it easy to leverage official rules, the MCP server,
-and custom commands for building your app. Additionally, rules files help
-fine-tune the AI's behavior and enforce project-specific best practices.
+AI can be used for building AI-powered apps with Flutter
+and for accelerating your development workflow.
+
+You can integrate AI-powered features like natural language understanding
+and content generation directly into your Flutter app
+using powerful SDKs, like the Firebase SDK for Generative AI.
+
+You can also use AI tools, such as Gemini Code Assist and Gemini CLI,
+to help with code generation and scaffolding.
+
+These tools are powered by the Dart and Flutter MCP server,
+which provides AI with a rich context about your codebase.
+
+The Flutter Extension for Gemini CLI makes it easy to leverage official rules,
+the MCP server, and custom commands for building your app.
+
+Additionally, rules files help fine-tune the AI's behavior
+and enforce project-specific best practices.
 
 ## Build AI-powered experiences with Flutter
 

src/data/sidenav.yml

@@ -271,59 +271,6 @@
 - divider
 - header: Beyond UI
 
-- title: AI solutions
-  permalink: /ai
-  icon: smart_toy
-  children:
-    - title: Create with AI
-      permalink: /ai/create-with-ai
-    - title: Rules for AI
-      permalink: /ai/ai-rules
-    - title: AI best practices
-      permalink: /ai/best-practices
-      children:
-        - title: Overview
-          permalink: /ai/best-practices
-        - title: Prompting
-          permalink: /ai/best-practices/prompting
-        - title: Structure & output
-          permalink: /ai/best-practices/structure-output
-        - title: Tool calls (aka function calls)
-          permalink: /ai/best-practices/tool-calls
-        - title: Mode of interaction
-          permalink: /ai/best-practices/mode-of-interaction
-        - title: Developer experience
-          permalink: /ai/best-practices/developer-experience
-    - title: AI Toolkit
-      permalink: /ai/ai-toolkit
-      children:
-        - title: Overview
-          permalink: /ai/ai-toolkit
-        - title: User experience
-          permalink: /ai/ai-toolkit/user-experience
-        - title: Feature integration
-          permalink: /ai/ai-toolkit/feature-integration
-        - title: Custom LLM providers
-          permalink: /ai/ai-toolkit/custom-llm-providers
-        - title: Chat client sample
-          permalink: /ai/ai-toolkit/chat-client-sample
-    - title: GenUI SDK for Flutter
-      permalink: /ai/genui
-      children:
-        - title: Overview
-          permalink: /ai/genui
-        - title: Main components & concepts
-          permalink: /ai/genui/components
-        - title: Get started
-          permalink: /ai/genui/get-started
-        - title: Input and events
-          permalink: /ai/genui/input-events
-    - title: Dart & Flutter MCP server
-      permalink: /ai/mcp-server
-    - title: Flutter extension for Gemini CLI
-      permalink: /ai/gemini-cli-extension
-    - title: Firebase AI Logic
-      permalink: https://firebase.google.com/docs/ai-logic/get-started?platform=flutter
 
 - title: Data & backend
   permalink: /data-and-backend