docs: update UI documentation

Signed-off-by: RadovanTomik <[email protected]>

docs/.vitepress/config.mts

@@ -76,7 +76,6 @@ export default defineConfig({
                 collapsed: false,
                 items: [
                     {text: 'Administrator', link: '/administrator'},
-                    {text: 'Customize UI', link: '/customizable'},
                     {text: 'Representative', link: '/representative'},
                 ]
             },

docs/administrator.md

@@ -1,3 +1,38 @@
-::: danger
-Site under construction! 🚧
-:::
+## Customizable User Interface
+
+The **Customizable UI** allows users to tailor the application’s appearance to fit their preferences or organizational
+branding. From adjusting color schemes to rearranging components, the UI can be easily modified, providing a
+personalized user experience that aligns with individual or company aesthetics.
+
+---
+
+### How to Customize the UI
+
+To customize the UI, you need administrator privileges. Follow these steps:
+
+#### Logging in as Admin and Accessing UI Configuration
+
+1. **Login as Admin**  
+   Log in to the system using your administrator credentials.
+
+2. **Access the UI Configuration**  
+   Choose one of the following methods:
+   - **Via Dropdown Menu:**
+      * After logging in, locate the dropdown menu.
+      * Select the **Admin UI Configuration** option.
+   - **Via Direct URL:**
+      * Navigate to the following URL in your browser: _/ui-configuration_.
+
+---
+
+### Configuring the Image URL
+
+The image URL input field can accept two types of values:
+
+1. **Local File Name:**  
+   Enter the name of a file available locally within the system.
+   * Example: _bbmri_
+
+2. **External Image URL:**  
+   Provide the complete URL of an image hosted on an external server.
+   * Example: `https://example.com/image.png`