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/project/ProjectCard.vue

@@ -133,7 +133,7 @@ watch(() => props.view, () => nextTick(measureDesc))
   border-radius: var(--df-radius-sm);
 }
 .stage-design { background: rgba(100,181,246,0.15); color: var(--df-info); }
-.stage-coding { background: rgba(108,99,255,0.15); color: var(--df-accent); }
+.stage-coding { background: var(--df-accent-soft); color: var(--df-accent); }
 .stage-testing { background: rgba(255,217,61,0.15); color: var(--df-warning); }
 .stage-release { background: rgba(100,255,218,0.15); color: var(--df-success); }