重构: 跨模块样式DRY收口+审批列表增强+灵感模块优化

- 全局样式收口: page-header/btn/modal/filter-bar/back-link/empty-state
  等通用类从12个视图的scoped重复定义提取到global.css/components.css
- 审批列表增强: 筛选栏(状态/风险/工具搜索)+行展开查看完整参数结果
  +审批耗时显示+刷新spinner+硬编码颜色全部改用CSS变量
- 灵感模块: scoreTier统一评分阈值+score-bar/assessment-badge提取全局
  +statusLabelKey消除重复+i18n状态文案对齐+eval-report--muted统一空态
- Dashboard: df-panel/df-link提取全局(修scoped不渗透)+统计卡可点击跳转
  +活跃项目面板只显示active状态+灵感列表按分数排序+刷新spinner
- 修复: intent.rs tool_type类型对齐(newtype)+ToolCardList补ai-btn定义
  +SkillMention/ImageInput样式不渗透修复(提取全局)

src/views/TaskDetail.vue

@@ -491,37 +491,8 @@ onBeforeUnmount(() => {
 <style scoped>
 .task-detail { padding: 16px 20px 20px; }
 
-.page-header {
-  display: flex;
-  justify-content: space-between;
-  align-items: center;
-  margin-bottom: var(--df-gap-page);
-}
+/* page-header / btn / back-link 等已提取到 global.css 全局 */
 .header-left { display: flex; align-items: center; gap: 12px; }
-.back-link { font-size: 13px; color: var(--df-accent); text-decoration: none; white-space: nowrap; }
-.back-link:hover { text-decoration: underline; }
-.page-header h1 { font-size: 24px; font-weight: 500; color: var(--df-text); }
-
-.header-actions { display: flex; gap: 10px; }
-
-/* ===== 按钮 ===== */
-.btn {
-  padding: 8px 16px;
-  border: none;
-  border-radius: var(--df-radius-sm);
-  font-size: 13px;
-  cursor: pointer;
-  transition: all 0.15s;
-}
-.btn-ghost { background: transparent; color: var(--df-text-secondary); border: 0.5px solid var(--df-border); }
-.btn-ghost:hover { background: var(--df-bg-card); color: var(--df-text); }
-/* F-05 推进按钮变体(样式跟随 Projects/ProjectDetail/Knowledge 同款 btn-primary/btn-danger/btn-sm) */
-.btn-primary { background: var(--df-accent); color: #fff; }
-.btn-primary:hover { background: var(--df-accent-hover); }
-.btn-danger { background: transparent; color: var(--df-danger); border: 0.5px solid rgba(240,101,101,0.4); }
-.btn-danger:hover { background: rgba(240,101,101,0.12); }
-.btn-sm { padding: 5px 12px; font-size: 12px; }
-.btn:disabled { opacity: 0.5; cursor: not-allowed; }
 
 /* F-05 推进操作区 */
 .advance-row .advance-actions {