feat: sortable workspace tabs, tab context menus, and terminal auto-create removal

- Add drag-and-drop tab reordering with persistent tab order
- Add right-click context menu with copy agent ID, copy resume command, close to right
- Switch workspace route encoding from percent-encoding to base64url
- Remove terminal auto-creation on directory listing (explicit create only)
- Add swipe gestures on terminal emulator for mobile sidebar navigation
- Highlight active workspace row in sidebar

packages/app/src/hooks/use-sidebar-agents-list.ts

@@ -393,7 +393,10 @@ export function useSidebarAgentsList(options?: {
         serverId,
         cwd: checkoutCwd,
         branchName: normalizedBranch,
-        createdAt: isMainCheckout ? sourceAgent.createdAt : null,
+        // Only Paseo-managed worktrees are ephemeral enough to justify showing a timestamp.
+        // If the daemon doesn't provide worktree.createdAt (older daemons), fall back to an
+        // agent-derived timestamp so the row still has a date.
+        createdAt: placement.checkout.isPaseoOwnedWorktree ? sourceAgent.createdAt : null,
         isMainCheckout,
         isPaseoOwnedWorktree: placement.checkout.isPaseoOwnedWorktree,
       })