优化: 无障碍批次(可点容器键盘化 + icon-only aria-label)

- P2-2 命名 4 处可点容器键盘可达: ToolCard 卡头 / MessageList 轨迹卡头 / AuditLog audit-row(tr) / conv-list-item —— tabindex+keydown 复用原 handler, div 类加 role=button+aria-expanded; tr 因 role=button 会抹掉行语义故不加 role
- P3-2 3 处 icon-only 按钮补 aria-label(EnrichmentPanel 关闭 / ProjectDetail 编辑·删除),复用同 :title 的 i18n key,零新增键
- 硬约束执行: 4 个并行子代理按文件分区,零跨文件改动;主代理独立核查 diff 后修正一处语义缺陷(tr role)
- 看板同步: P2-2 销账 / P3-2 部分完成(~12 处待续) / 残留诊断代码 authz_debug 已清销账 / G6 标题泄漏(title.rs sanitize_title_source 双路径)销账
- 验收: bunx vue-tsc --noEmit EXIT 0 + node scripts/check-i18n.cjs 0 失败

src/views/ProjectDetail.vue

@@ -170,10 +170,10 @@
                     <span v-else class="module-status-badge module-status-active">{{ $t('projectDetail.moduleStatusActive') }}</span>
                     <span class="module-path-overview" :title="m.path">{{ m.path }}</span>
                     <span class="module-row-actions">
-                      <button class="ai-btn-icon" :title="$t('fileExplorer.editModule')" @click="openEditModule(m)">
+                      <button class="ai-btn-icon" :title="$t('fileExplorer.editModule')" :aria-label="$t('fileExplorer.editModule')" @click="openEditModule(m)">
                         <svg aria-hidden="true" width="13" height="13" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.8" stroke-linecap="round" stroke-linejoin="round"><path d="M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7"/><path d="M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z"/></svg>
                       </button>
-                      <button class="ai-btn-icon module-row-action-danger" :title="$t('fileExplorer.deleteCurrentModule')" @click="confirmRemoveModule(m)">
+                      <button class="ai-btn-icon module-row-action-danger" :title="$t('fileExplorer.deleteCurrentModule')" :aria-label="$t('fileExplorer.deleteCurrentModule')" @click="confirmRemoveModule(m)">
                         <svg aria-hidden="true" width="13" height="13" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.8" stroke-linecap="round" stroke-linejoin="round"><polyline points="3 6 5 6 21 6"/><path d="M19 6l-1 14a2 2 0 0 1-2 2H8a2 2 0 0 1-2-2L5 6m3 0V4a2 2 0 0 1 2-2h4a2 2 0 0 1 2 2v2"/></svg>
                       </button>
                     </span>