docs(web-dashboard): update local setup instructions

- Clarify Flutter SDK installation process and reference official guide
- Enable web development support via command line instruction
- Recommend AppEnvironment.demo for UI development
- Update API Server local setup documentation link

Author: fulleni

src/content/docs/web-dashboard/local-setup.mdx

@@ -10,9 +10,14 @@ This guide will walk you through setting up and running the Flutter News App Web
 <Steps>
 1.  **Prerequisites**
 
-    Before you begin, ensure you have the following software installed on your system:
+    Before you begin, you must have the Flutter SDK installed and configured for web development. To ensure you are using the most up-to-date and accurate installation instructions, we recommend following the official guide directly from the Flutter team.
 
-    -   **Flutter SDK:** Version `3.8.0` or higher. Make sure you have configured it for web development by running `flutter config --enable-web`.
+    -   **Flutter SDK:** Please follow the [Official Flutter Installation Guide](https://flutter.dev/docs/get-started/install) for your specific operating system.
+    
+    Once installed, enable web development support by running:
+    ```bash
+    flutter config --enable-web
+    ```
 
 2.  **Clone the Repository**
 
@@ -38,7 +43,7 @@ This guide will walk you through setting up and running the Flutter News App Web
     -   Open the file `lib/main.dart`.
     -   Locate the `appEnvironment` constant.
     -   Set its value to one of the following:
-        -   `AppEnvironment.demo`: Runs the dashboard with in-memory mock data. No backend API is required. This is great for testing UI components.
+        -   `AppEnvironment.demo`: **(Recommended for UI development)** Runs the dashboard with in-memory mock data. No backend API is required, making it perfect for focusing on UI changes and component testing.
         -   `AppEnvironment.development`: Connects the dashboard to a locally running instance of the API server (typically at `http://localhost:8080`).
         -   `AppEnvironment.production`: Connects the dashboard to your live, deployed backend API.
 
@@ -50,7 +55,7 @@ This guide will walk you through setting up and running the Flutter News App Web
     ```
 
     <Aside>
-    For the `development` environment, you must have the [API Server running locally](/docs/getting-started/local-setup-api) first.
+    For the `development` environment, you must have the [API Server running locally](/docs/api-server/local-setup/) first.
     </Aside>
 
 5.  **Run the Development Server**