feat: remove issues/milestones from nav, show project code

src/components/Sidebar.tsx

@@ -31,9 +31,7 @@ export default function Sidebar({ user, onLogout }: Props) {
 
   const links = user ? [
     { to: '/', icon: '📊', label: 'Dashboard' },
-    { to: '/issues', icon: '📋', label: 'Issues' },
     { to: '/projects', icon: '📁', label: 'Projects' },
-    { to: '/milestones', icon: '🏁', label: 'Milestones' },
     { to: '/notifications', icon: '🔔', label: 'Notifications' + (unreadCount > 0 ? ' (' + unreadCount + ')' : '') },
     { to: '/monitor', icon: '📡', label: 'Monitor' },
   ] : [

src/pages/ProjectsPage.tsx

@@ -50,7 +50,7 @@ export default function ProjectsPage() {
       <div className="project-grid">
         {projects.map((p) => (
           <div key={p.id} className="project-card" onClick={() => navigate(`/projects/${p.id}`)}>
-            <h3>{p.name}</h3>
+            <h3>{p.name}</h3>{p.project_code && <span className=badge style={{ marginLeft: 8 }}>{p.project_code}</span>}
             <p className="project-desc">{p.description || 'No description'}</p>
             <div className="project-meta">
               <span>Created {dayjs(p.created_at).format('YYYY-MM-DD')}</span>

src/types/index.ts

@@ -13,6 +13,7 @@ export interface Project {
   name: string
   description: string | null
   owner_id: number
+  project_code: string | null
   created_at: string
 }