优化: UI/UX遗留批(审计/AI命令层/前端组件,会话前基线收尾)

- AuditLog +298(筛选/详情/i18n)+ audit 后端 record/mod

- AI 命令层:generate_image +81 / fetch_url / fetch_search / skills / tool_registry / tools/file / provider / conversation

- 前端组件:AiChat/TopBar/ConversationSidebar/GitChanges/ApprovalPopup/Dashboard/ProjectDetail 等 30+ + composables + i18n

- 诊断文档: aichat历史会话实证诊断-2026-08-04 + project_soft_delete 测试

src/components/workflow/WorkflowDagDisplay.vue

@@ -229,7 +229,7 @@ function cancelEdit() {
 .wf-dag-node-name { font-weight: 500; white-space: nowrap; }
 .wf-dag-node-type {
   font-size: 10px; color: var(--df-text-dim, #888);
-  background: var(--df-bg-card, #f0f0f0); padding: 0 4px; border-radius: 3px;
+  background: var(--df-bg-card, #f0f0f0); padding: 0 4px; border-radius: 4px;
 }
 .wf-dag-node-status { font-size: 11px; }
 .wf-dag-node-status-dot {
@@ -270,7 +270,7 @@ function cancelEdit() {
 }
 .wf-dag-cond-label--uncond { background: transparent; color: var(--df-text-dim, #aaa); }
 .wf-dag-cond-label--editable {
-  cursor: pointer; font-size: 11px; padding: 1px 6px; border-radius: 3px;
+  cursor: pointer; font-size: 11px; padding: 1px 6px; border-radius: 4px;
   transition: background 0.15s;
 }
 .wf-dag-cond-label--editable:hover { background: rgba(74,144,226,0.18); }
@@ -284,7 +284,7 @@ function cancelEdit() {
 .wf-dag-edge-arrow { color: var(--df-text-primary); white-space: nowrap; }
 .wf-dag-edge-input {
   flex: 1; min-width: 0; font-family: var(--df-font-mono); font-size: 11px;
-  padding: 2px 6px; border: 0.5px solid var(--df-border); border-radius: 3px;
+  padding: 2px 6px; border: 0.5px solid var(--df-border); border-radius: 4px;
   background: var(--df-bg); color: var(--df-text); outline: none;
 }
 .wf-dag-edge-input:focus { border-color: var(--df-accent); }