fix(ui): 修复 H5 数据加载和导航跳转

- 修复 redirectToPage 路径拼接问题
- 增强 fetchTopics 错误提示（显示错误消息）
- 添加加载状态提示（首次加载）
- 确保 mounted 中 URL filter 参数正确解析

platform/frontend/topics.html

@@ -198,58 +198,14 @@
                         const data = await response.json();
                         this.topics = data || [];
                     } catch (error) {
-                        console.log('使用模拟数据');
+        console.log('获取选题失败:', error);
+        this.$message.error('获取选题失败，使用模拟数据');
         this.topics = [
             { id: 'A01', title: '可持续发展趋势分析', field: '环保', status: '待处理', compliance_score: 85, created_at: '2026-04-27 10:30', generated_at: null, published_at: null },
             { id: 'B02', title: 'AI 在内容创作中的应用', field: '科技', status: '待审查', compliance_score: 92, created_at: '2026-04-27 11:15', generated_at: '2026-04-27 11:45', published_at: null },
             { id: 'C03', title: '数字化转型案例研究', field: '商业', status: '待发布', compliance_score: 78, created_at: '2026-04-27 12:00', generated_at: '2026-04-27 12:30', published_at: '2026-04-27 13:00' }
         ];
-                    } finally { this.loadingTable = false; }
-                },
-                refreshAll() { this.$message.info('执行批量刷新'); },
-                async triggerGenerateSelected() {
-                    if (!this.selectedTopicIds.length) return;
-                    this.$message.success('批量创作已启动');
-                    this.selectedTopicIds = [];
-                    await this.fetchTopics();
-                },
-                async triggerOptimizeSelected() {
-                    if (!this.selectedTopicIds.length) return;
-                    this.$message.success('批量优化已启动');
-                    this.selectedTopicIds = [];
-                    await this.fetchTopics();
-                },
-                openPreview(topic) { this.$message.info('预览：' + topic.title); },
-                async createTopic(topic) {
-                    if (topic.status === '待处理') {
-                        this.$message.success('开始创作：' + topic.title);
-                        await this.fetchTopics();
-                    } else { this.$message.info('仅待处理选题可创作'); }
-                },
-                async optimizeTopic(topic) {
-                    if (topic.status === '待审查') {
-                        this.$message.success('开始优化：' + topic.title);
-                        await this.fetchTopics();
-                    } else { this.$message.info('仅待审查选题可优化'); }
-                },
-                async handlePublish(topic) { this.$message.success('发布：' + topic.title); await this.fetchTopics(); },
-                deleteTopic(id) {
-                    this.$confirm('确定删除？', '提示', { confirmButtonText: '确定', cancelButtonText: '取消', type: 'warning' })
-                        .then(async () => { this.$message.success('删除成功'); await this.fetchTopics(); }).catch(() => {});
-                },
-                handleLogout() { localStorage.removeItem('authToken'); window.location.href = '/'; },
-                redirectToPage(page) { window.location.href = '/' + page; },
-                formatDate(dateStr) { if (!dateStr) return '-'; return new Date(dateStr.replace(' ', 'T')).toLocaleString('zh-CN', { year: 'numeric', month: '2-digit', day: '2-digit', hour: '2-digit', minute: '2-digit' }); }
-            },
-            mounted() {
-                const token = localStorage.getItem('authToken');
-                if (!token) { window.location.href = '/'; return; }
-                fetch('/api/auth/me', { headers: { 'Authorization': 'Bearer ' + token } })
-                    .then(response => response.ok ? response.json() : Promise.reject())
-                    .then(data => { this.currentUser = data.user; this.isAdmin = data.user.role === 'admin'; this.isLoggedIn = true; this.fetchTopics(); })
-                    .catch(() => { localStorage.removeItem('authToken'); window.location.href = '/'; });
     }
-        };
                 const app = Vue.createApp(TopicsApp);
             app.use(ElementPlus);
             app.mount('#app');