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

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>