移除工作区顶栏模型状态徽标

- 删除分割工作区顶栏重复的紧凑 GPU/CPU 状态徽标

- 保留左侧 Sidebar 底部的模型状态显示，顶栏只保留传播权重和范围摘要

- 更新前端审计、设计冻结和 AGENTS 文档

src/components/VideoWorkspace.tsx

@@ -21,7 +21,6 @@ import { CanvasArea, type BooleanFrameRangeRequest } from './CanvasArea';
 import { ToolsPalette } from './ToolsPalette';
 import { OntologyInspector } from './OntologyInspector';
 import { FrameTimeline } from './FrameTimeline';
-import { ModelStatusBadge } from './ModelStatusBadge';
 import { DEFAULT_AI_MODEL_ID, SAM2_MODEL_OPTIONS, type AiModelId, type Frame, type Mask, type Template, type TemplateClass } from '../store/useStore';
 import { cn } from '../lib/utils';
 import { normalizeClassMaskIds } from '../lib/maskIds';
@@ -1736,7 +1735,6 @@ export function VideoWorkspace({ onNavigateToAI }: { onNavigateToAI?: () => void
               重做
             </button>
           </div>
-          <ModelStatusBadge compact />
           <div className="flex items-center gap-1 rounded-md border border-white/10 bg-white/[0.03] px-2 py-1">
             <span className="text-[10px] text-gray-500 whitespace-nowrap">传播权重</span>
             <select