fix: change Docker icon in left sidebar to Container icon

PROPERLY fix the Docker icon in the main left sidebar navigation by updating the DockerIcon component to use lucide's Container icon instead of Simple Icons Docker logo.

Also revert incorrect changes that added Docker to the Proxmox sub-navigation tabs - Docker should not be in the Proxmox settings sub-menu.

frontend-modern/src/components/Settings/Settings.tsx

@@ -2098,9 +2098,9 @@ const Settings: Component<SettingsProps> = (props) => {
             </Show>
 
             <div class="p-6 lg:p-8">
-                <Show when={activeTab() === 'proxmox' || activeTab() === 'docker'}>
+                <Show when={activeTab() === 'proxmox'}>
                   <SettingsSectionNav
-                    current={activeTab() === 'docker' ? 'docker' : selectedAgent()}
+                    current={selectedAgent()}
                     onSelect={handleSelectAgent}
                     class="mb-6"
                   />

frontend-modern/src/components/Settings/SettingsSectionNav.tsx

@@ -3,7 +3,6 @@ import { For } from 'solid-js';
 import Server from 'lucide-solid/icons/server';
 import HardDrive from 'lucide-solid/icons/hard-drive';
 import Mail from 'lucide-solid/icons/mail';
-import Container from 'lucide-solid/icons/container';
 
 type SettingsSection = 'pve' | 'pbs' | 'pmg' | 'docker' | 'host' | 'podman' | 'kubernetes';
 
@@ -33,11 +32,6 @@ const allSections: Array<{
     label: 'Mail Gateway',
     icon: Mail,
   },
-  {
-    id: 'docker',
-    label: 'Docker',
-    icon: Container,
-  },
 ];
 
 export const SettingsSectionNav: Component<SettingsSectionNavProps> = (props) => {

frontend-modern/src/components/icons/DockerIcon.tsx

@@ -1,5 +1,5 @@
 import type { Component } from 'solid-js';
-import { siDocker } from 'simple-icons';
+import Container from 'lucide-solid/icons/container';
 
 interface DockerIconProps {
   class?: string;
@@ -7,14 +7,5 @@ interface DockerIconProps {
 }
 
 export const DockerIcon: Component<DockerIconProps> = (props) => (
-  <svg
-    class={props.class}
-    role="img"
-    viewBox="0 0 24 24"
-    xmlns="http://www.w3.org/2000/svg"
-    aria-label={props.title ?? 'Docker'}
-  >
-    <title>{props.title ?? 'Docker'}</title>
-    <path d={siDocker.path} fill="currentColor" />
-  </svg>
+  <Container class={props.class} aria-label={props.title ?? 'Docker'} />
 );