feat: 内容数据迁移至数据库，合规审查全链路打通

- 文章 HTML 存储从文件系统迁移至 articles 表，删除 releases 目录
- 合规审查从 DB 读取 HTML，审查结果写回 DB，通过后自动推进至待发布
- 新增 todayCount 筛选按钮，与系统概览统计数据一致
- 全屏预览修复：提升 z-index 超过侧边栏，添加退出全屏/关闭按钮
- 统一 '优化' → '审查' 命名，消除前后端术语不一致
- 调度器创作完成后自动触发审查（生成 → 审查 → 待发布）
- 清理旧备份/调试文件、过期大纲和研究笔记

platform/frontend/theme-modern.css

@@ -0,0 +1,64 @@
+/* Modern page fade-in */
+.page-fade { animation: fadeIn 0.4s ease-out; }
+@keyframes fadeIn { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: translateY(0); } }
+
+/* Enhanced cards */
+.card-modern { border-radius: 16px; transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1); }
+.card-modern:hover { box-shadow: 0 8px 28px rgba(0,0,0,0.1); }
+
+/* Gradient text */
+.text-gradient { background: linear-gradient(135deg, #2563eb, #7c3aed); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
+.text-gradient-primary { background: linear-gradient(135deg, #667eea, #764ba2); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
+.text-gradient-success { background: linear-gradient(135deg, #67c23a, #85e61d); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
+.text-gradient-warning { background: linear-gradient(135deg, #e6a23c, #f5c543); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
+.text-gradient-danger { background: linear-gradient(135deg, #f56c6c, #f79296); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
+.text-gradient-info { background: linear-gradient(135deg, #409eff, #5cd0f3); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
+
+/* Pulse animation */
+@keyframes pulse-glow { 0%, 100% { box-shadow: 0 0 0 0 rgba(103, 194, 58, 0.4); } 50% { box-shadow: 0 0 0 8px rgba(103, 194, 58, 0); } }
+
+/* Shimmer hover effect */
+.shimmer { position: relative; overflow: hidden; }
+.shimmer::before { content: ''; position: absolute; top: 0; left: -100%; width: 100%; height: 100%; background: linear-gradient(90deg, transparent, rgba(37, 99, 235, 0.06), transparent); transition: left 0.6s; }
+.shimmer:hover::before { left: 100%; }
+
+/* Elastic hover lift */
+.hover-lift { transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1); }
+.hover-lift:hover { transform: translateY(-6px) scale(1.02); }
+
+/* Modern stat card */
+.stat-card-modern { border-radius: 16px; padding: 24px; cursor: pointer; transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1); background: white; border: 1px solid #ebeef5; }
+.stat-card-modern:hover { transform: translateY(-4px); box-shadow: 0 8px 24px rgba(0,0,0,0.08); border-color: #c6d8ff; }
+.stat-card-modern .stat-value { font-size: 32px; font-weight: 800; line-height: 1.2; }
+.stat-card-modern .stat-label { font-size: 13px; color: #909399; margin-top: 8px; text-transform: uppercase; letter-spacing: 0.5px; }
+
+/* Status badge */
+.status-badge-modern { display: inline-flex; align-items: center; gap: 6px; padding: 4px 12px; border-radius: 20px; font-size: 12px; font-weight: 600; }
+.status-badge-modern.running { background: rgba(103, 194, 58, 0.12); color: #67c23a; border: 1px solid rgba(103, 194, 58, 0.25); animation: pulse-glow 2s infinite; }
+
+/* Modern el-table refinements */
+.el-table { border-radius: 12px; overflow: hidden; }
+
+/* Smooth page transitions */
+.page-enter-active { animation: fadeIn 0.4s ease-out; }
+
+/* ========== H5响应式 ========== */
+@media (max-width: 768px) {
+  /* 对话框自适应宽度 */
+  .el-dialog { width: calc(100vw - 24px) !important; max-width: none !important; }
+  .el-dialog__body { padding: 16px !important; }
+
+  /* 表单网格在手机上改为单列 */
+  .el-row .el-col-12 { width: 100% !important; }
+
+  /* 手机端表格卡片 */
+  .mobile-card { position: relative; }
+  .mobile-card:active { transform: scale(0.98); }
+}
+
+/* 触摸优化：增大按钮点击区域 */
+@media (max-width: 768px) {
+  .el-button--small { min-height: 36px; padding: 8px 14px !important; }
+  .el-input__inner { min-height: 38px; }
+  .el-table__cell .el-button { padding: 8px 12px !important; }
+}