Fix Prowlarr settings name assignment and update UI class names for consistency

- Set the Prowlarr name to a fixed value since it is always a single instance.
- Updated class names in the Prowlarr configuration UI for better clarity and consistency, changing 'prowlarr-item' to 'instance-item' and 'prowlarr-header' to 'instance-header'.
- Removed the input field for the Prowlarr name as it is no longer necessary.

Author: Admin9705

frontend/static/js/settings_forms.js

@@ -4116,7 +4116,7 @@ const SettingsForms = {
                 settings.instances = [];
 
                 settings.enabled = getInputValue('#prowlarr-enabled-0', true);
-                settings.name = getInputValue('#prowlarr-name-0', 'Prowlarr');
+                settings.name = 'Prowlarr'; // Fixed name since Prowlarr is always single instance
                 settings.api_url = getInputValue('#prowlarr-url-0', '');
                 settings.api_key = getInputValue('#prowlarr-key-0', '');
             }
@@ -5794,14 +5794,14 @@ const SettingsForms = {
             ">
                 <h3>Prowlarr Configuration</h3>
                 <div class="prowlarr-container">
-                    <div class="prowlarr-item" data-instance-id="0">
-                        <div class="prowlarr-header">
+                    <div class="instance-item" data-instance-id="0">
+                        <div class="instance-header">
                             <h4>Prowlarr</h4>
-                            <div class="prowlarr-actions">
-                                <span class="connection-status" id="prowlarr-status-0" style="margin-left: 10px; font-weight: bold; font-size: 0.9em;"></span>
+                            <div class="instance-actions">
+                                <span class="connection-status" id="prowlarr-status-0"></span>
                             </div>
                         </div>
-                        <div class="prowlarr-content">
+                        <div class="instance-content">
                             <div class="setting-item">
                                 <label for="prowlarr-enabled-0">Enabled:</label>
                                 <label class="toggle-switch" style="width:40px; height:20px; display:inline-block; position:relative;">
@@ -5810,11 +5810,6 @@ const SettingsForms = {
                                 </label>
                                 <p class="setting-help">Enable or disable Prowlarr integration</p>
                             </div>
-                            <div class="setting-item">
-                                <label for="prowlarr-name-0">Name:</label>
-                                <input type="text" id="prowlarr-name-0" name="name" value="${settings.name || 'Prowlarr'}" placeholder="Friendly name for Prowlarr">
-                                <p class="setting-help">Friendly name for this Prowlarr instance</p>
-                            </div>
                             <div class="setting-item">
                                 <label for="prowlarr-url-0">URL:</label>
                                 <input type="text" id="prowlarr-url-0" name="api_url" value="${settings.api_url || ''}" placeholder="Base URL for Prowlarr (e.g., http://localhost:9696)" data-instance-index="0">