Add server ownership, team access, role-based UI, and default admin role

- New migration 002_server_access.sql: created_by column + server_user table
- Server model: ownership, permission checks, team management methods
- Routes: /team routes, RoleMiddleware on /servers/create and /admin
- ServerController: permission checks via server_user, team CRUD methods
- TerminalController: server access checks
- DashboardController: filter servers by accessible ones
- ApiController: server access checks
- Views: team.php, team_server.php, sidebar Team link, hide actions by role
- Default user role changed from operator to admin on registration
- Admin user form defaults to admin role

views/servers/show.php

@@ -2,6 +2,8 @@
 $server = $server ?? [];
 $metrics = $metrics ?? null;
 $historicalMetrics = $historicalMetrics ?? [];
+$server_role = $server_role ?? null;
+$canManage = $server_role === 'owner' || $server_role === 'manager';
 ?>
 
 <div class="page-header">
@@ -20,12 +22,23 @@ $historicalMetrics = $historicalMetrics ?? [];
     </div>
     <div class="page-header-right">
         <div class="btn-group">
+            <?php if ($server_role === 'owner'): ?>
+            <a href="/team/<?= $server['id'] ?>" class="btn btn-secondary" title="Manage Team">
+                <i class="fas fa-users-cog"></i>
+            </a>
+            <?php endif; ?>
+            <span class="badge badge-<?= $server_role === 'owner' || $server_role === 'manager' ? 'warning' : 'info' ?>" style="align-self:center">
+                <?= htmlspecialchars(ucfirst($server_role ?? 'viewer')) ?>
+            </span>
             <a href="/terminal/<?= $server['id'] ?>" class="btn btn-dark">
                 <i class="fas fa-terminal"></i> Terminal
             </a>
+            <?php if ($canManage): ?>
             <a href="/servers/<?= $server['id'] ?>/edit" class="btn btn-secondary">
                 <i class="fas fa-edit"></i> Edit
             </a>
+            <?php endif; ?>
+            <?php if ($canManage): ?>
             <div class="dropdown">
                 <button class="btn btn-secondary dropdown-toggle">
                     <i class="fas fa-cog"></i> Actions
@@ -43,6 +56,7 @@ $historicalMetrics = $historicalMetrics ?? [];
                     </button>
                 </div>
             </div>
+            <?php endif; ?>
         </div>
     </div>
 </div>
@@ -154,6 +168,7 @@ $historicalMetrics = $historicalMetrics ?? [];
                 <i class="fas fa-file-alt"></i>
                 <span>System Logs</span>
             </a>
+            <?php if ($canManage): ?>
             <a href="/servers/<?= $server['id'] ?>/nginx" class="action-card">
                 <svg viewBox="0 0 24 24" fill="currentColor" width="24" height="24" style="opacity:0.8">
                     <path d="M12 2L2 7.2v9.6L12 22l10-5.2V7.2L12 2zm0 1.5l8.5 4.4v8.2L12 20.5l-8.5-4.4V7.9L12 3.5zM7.4 8.5v7l1.5.9V11l3.1 4.3 1.5.9V8.5l-1.5.9v4.4L8.9 9.4l-1.5-.9zm9.2 0l-1.5.9-3.1 4.4V17l1.5-.9V11l3.1-4.3z"/>
@@ -180,6 +195,7 @@ $historicalMetrics = $historicalMetrics ?? [];
                 <i class="fas fa-sync-alt"></i>
                 <span>Restart Service</span>
             </button>
+            <?php endif; ?>
         </div>
     </div>
 </div>