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/e2e/workspace-header-tabs-restore.spec.ts

@@ -6,9 +6,10 @@ import {
   setWorkingDirectory,
 } from "./helpers/app";
 import { createTempGitRepo } from "./helpers/workspace";
+import { buildHostWorkspaceRoute } from "@/utils/host-routes";
 
 function buildWorkspaceRoute(serverId: string, workspacePath: string): string {
-  return `/h/${encodeURIComponent(serverId)}/workspace/${encodeURIComponent(workspacePath)}`;
+  return buildHostWorkspaceRoute(serverId, workspacePath);
 }
 
 async function openWorkspaceWithAgent(page: Page, workspacePath: string): Promise<void> {