feat(agency): 达人管理添加任务进度展开提示

- 达人名称下方添加可点击的提示文字
- 未展开时显示"查看 N 个任务进度"
- 展开后显示"收起任务进度"
- 提示用户可以点击查看任务详情

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

frontend/app/agency/creators/page.tsx

@@ -354,7 +354,28 @@ export default function AgencyCreatorsPage() {
                           <div className="w-10 h-10 rounded-full bg-gradient-to-br from-accent-indigo to-purple-500 flex items-center justify-center">
                             <span className="text-white font-medium">{creator.avatar}</span>
                           </div>
-                          <div className="font-medium text-text-primary">{creator.name}</div>
+                          <div>
+                            <div className="font-medium text-text-primary">{creator.name}</div>
+                            {hasActiveTasks && (
+                              <button
+                                type="button"
+                                onClick={() => toggleExpand(creator.id)}
+                                className="text-xs text-accent-indigo hover:underline flex items-center gap-1 mt-0.5"
+                              >
+                                {isExpanded ? (
+                                  <>
+                                    <ChevronDown size={12} />
+                                    收起任务进度
+                                  </>
+                                ) : (
+                                  <>
+                                    <ChevronRight size={12} />
+                                    查看 {creator.tasks.length} 个任务进度
+                                  </>
+                                )}
+                              </button>
+                            )}
+                          </div>
                         </div>
                       </td>
                       <td className="px-6 py-4">