Projects: collapse by default + company tabs

- ProjectGroup starts collapsed (open=false)
- Multi-company clients see tab switcher matching Invoices page style
- Single-company clients: no tabs, no change

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/pages/client/MyProjects.jsx

@@ -9,7 +9,7 @@ import { withTimeout } from '../../lib/withTimeout';
 const rLabel = (v) => 'R' + String(v || 0).padStart(2, '0');
 
 function ProjectGroup({ project, tasks, submissions, currentUserId, filter }) {
-  const [open, setOpen] = useState(true);
+  const [open, setOpen] = useState(false);
 
   const filteredTasks = filter === 'mine'
     ? tasks.filter(task => {
@@ -115,6 +115,8 @@ export default function MyProjects() {
   const [submissions, setSubmissions] = useState([]);
   const [loading, setLoading] = useState(true);
   const [filter, setFilter] = useState('all'); // 'all' | 'mine'
+  const companies = currentUser.companies?.length ? currentUser.companies : (currentUser.company ? [currentUser.company] : []);
+  const [activeCompanyId, setActiveCompanyId] = useState(() => companies[0]?.id || null);
 
   useEffect(() => {
     async function load() {
@@ -187,6 +189,27 @@ export default function MyProjects() {
         </div>
       </div>
 
+      {companies.length > 1 && (
+        <div style={{ marginBottom: 16, display: 'flex', alignItems: 'center', gap: 10, flexWrap: 'wrap' }} className="card-title">
+          {companies.map((company, index) => (
+            <span key={company.id} style={{ display: 'inline-flex', alignItems: 'center', gap: 10 }}>
+              {index > 0 && <span style={{ color: 'var(--text-muted)' }}>|</span>}
+              <button
+                type="button"
+                onClick={() => setActiveCompanyId(company.id)}
+                style={{
+                  background: 'none', border: 'none', padding: 0, margin: 0,
+                  cursor: 'pointer', font: 'inherit', textTransform: 'inherit', letterSpacing: 'inherit',
+                  color: activeCompanyId === company.id ? 'var(--text-primary)' : 'var(--text-muted)',
+                }}
+              >
+                {company.name}
+              </button>
+            </span>
+          ))}
+        </div>
+      )}
+
       {projects.length === 0 ? (
         <div className="empty-state">
           <h3>No projects yet</h3>
@@ -194,47 +217,26 @@ export default function MyProjects() {
           <Link to="/new-project" className="btn btn-primary" style={{ marginTop: 16 }}>+ New Project</Link>
         </div>
       ) : (() => {
-        const companies = currentUser.companies || (currentUser.company ? [currentUser.company] : []);
-        const multiCompany = companies.length > 1;
-        const companyMap = Object.fromEntries(companies.map(c => [c.id, c.name]));
-        const grouped = companies
-          .map(c => ({ company: c, projects: projects.filter(p => p.company_id === c.id) }))
-          .filter(g => g.projects.length > 0);
-        const ungrouped = projects.filter(p => !companies.some(c => c.id === p.company_id));
+        const visibleProjects = companies.length > 1
+          ? projects.filter(p => p.company_id === activeCompanyId)
+          : projects;
 
-        return (
-          <>
-            {grouped.map(({ company, projects: groupProjects }) => (
-              <div key={company.id}>
-                {multiCompany && (
-                  <div style={{ fontSize: 11, fontWeight: 700, letterSpacing: '0.08em', textTransform: 'uppercase', color: 'var(--text-muted)', marginBottom: 8, marginTop: 16, paddingLeft: 2 }}>
-                    {company.name}
+        if (visibleProjects.length === 0) return (
+          <div className="empty-state">
+            <h3>No projects for this company</h3>
           </div>
-                )}
-                {groupProjects.map(project => (
-                  <ProjectGroup
-                    key={project.id}
-                    project={project}
-                    tasks={tasks.filter(t => t.project_id === project.id)}
-                    submissions={submissions}
-                    currentUserId={currentUser.id}
-                    filter={filter}
-                  />
-                ))}
-              </div>
-            ))}
-            {ungrouped.map(project => (
-              <ProjectGroup
-                key={project.id}
-                project={project}
-                tasks={tasks.filter(t => t.project_id === project.id)}
-                submissions={submissions}
-                currentUserId={currentUser.id}
-                filter={filter}
-              />
-            ))}
-          </>
         );
+
+        return visibleProjects.map(project => (
+          <ProjectGroup
+            key={project.id}
+            project={project}
+            tasks={tasks.filter(t => t.project_id === project.id)}
+            submissions={submissions}
+            currentUserId={currentUser.id}
+            filter={filter}
+          />
+        ));
       })()}
     </Layout>
   );