docs: fix broken links in documentation

- Update link to Local Setup Guide in mobile-client/index.mdx
- Update relative links in web-dashboard/deployment.mdx, web-dashboard/local-setup.mdx, and web-dashboard/web-dashboard.mdx

Author: fulleni

src/content/docs/mobile-client/index.mdx

@@ -39,4 +39,4 @@ The mobile client comes packed with features designed to provide a comprehensive
 
 To get the mobile client up and running on your local machine, head over to our setup guide.
 
-- **[Local Setup Guide](./getting-started/local-setup)**
+- **[Local Setup Guide](./mobile-client/local-setup)**

src/content/docs/web-dashboard/deployment.mdx

@@ -22,7 +22,7 @@ This guide covers the essential steps for deploying the Flutter News App Web Das
     ```
 
     <Aside>
-    Ensure that the `baseUrl` for the `production` environment in `lib/app/config/app_config.dart` points to the correct URL of your deployed [API Server](/api-server/deployment/).
+    Ensure that the `baseUrl` for the `production` environment in `lib/app/config/app_config.dart` points to the correct URL of your deployed [API Server](./api-server/deployment/).
     </Aside>
 
 2.  **Build the Web Application**

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

@@ -50,7 +50,7 @@ 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](/getting-started/local-setup-api) first.
+    For the `development` environment, you must have the [API Server running locally](./getting-started/local-setup-api) first.
     </Aside>
 
 5.  **Run the Development Server**

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

@@ -22,7 +22,7 @@ This guide covers the essential steps for deploying the Flutter News App Web Das
     ```
 
     <Aside>
-    Ensure that the `baseUrl` for the `production` environment in `lib/app/config/app_config.dart` points to the correct URL of your deployed [API Server](/deployment/api-server/).
+    Ensure that the `baseUrl` for the `production` environment in `lib/app/config/app_config.dart` points to the correct URL of your deployed [API Server](./deployment/api-server/).
     </Aside>
 
 2.  **Build the Web Application**