Revert "dock: Gitea gets the teacup"

This reverts 061e2137.

The artwork is right, the location is not: gitea is about to become a plugin,
and a plugin carries its own icon in assets/ — published to /plugins/<name>/ on
install, and removed when it is uninstalled. Putting it in the platform's
public/icons/ makes it the one plugin whose tile the platform ships, and it
would keep being served after an uninstall.

Added here only because the plugin repository did not exist yet. It does not
yet, either — this goes back in as plugins/gitea/assets/icon.png once it does.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

src/apps/officer-web/Screens/Dashboard/Layout/Dock.tsx

@@ -151,6 +151,7 @@ import {
   Music,
   Activity,
   Radio,
+  GitBranch,
   Store,
   Puzzle,
   Radar,
@@ -172,7 +173,7 @@ export const CORE_DOCK_ITEMS: DockItem[] = [
   { label: 'Files', to: '/files', icon: FolderOpen, color: '#fbbf24' },
   { label: 'Chat', to: '/chat', icon: MessageCircle, color: '#60a5fa' },
   { label: 'Command HQ', to: '/command-hq', icon: Radar, color: '#f43f5e' },
-  { label: 'Gitea', to: '/gitea', image: '/icons/gitea.png', tile: 'bare', color: '#609926' },
+  { label: 'Gitea', to: '/gitea', icon: GitBranch, color: '#609926' },
   { label: 'Editor', to: '/code-editor', icon: Code, color: '#a78bfa' },
   { label: 'Jobs', to: '/jobs', icon: Workflow, color: '#14b8a6' },
   { label: 'Terminal', to: '/terminal', icon: Monitor, color: '#f97316' },