添加Docker自包含部署分支

- 新增 Seg_Server_Docker 自包含部署内容，包含前后端、FastAPI、Celery、PostgreSQL、Redis、MinIO、演示视频和 DICOM 数据。

- 保留 demo 数据以支持恢复演示出厂设置，排除 SAM 2.1 .pt 权重并在 README 中补充下载命令。

- 补充 GPU 部署、backend/worker 镜像复用、frpc/frps + NPM 公网域名反代部署说明。

- 在 .env/.env.example 中用 # XXXX 标注局域网和公网域名部署需要修改的配置项。

- 添加部署分支 .gitignore，忽略本地模型权重、构建产物、缓存和日志。

src/components/ModelStatusBadge.tsx

@@ -0,0 +1,56 @@
+import React, { useEffect, useState } from 'react';
+import { Cpu, Loader2 } from 'lucide-react';
+import { getAiModelStatus, type AiRuntimeStatus } from '../lib/api';
+import { cn } from '../lib/utils';
+import { useStore } from '../store/useStore';
+
+interface ModelStatusBadgeProps {
+  compact?: boolean;
+}
+
+export function ModelStatusBadge({ compact = false }: ModelStatusBadgeProps) {
+  const aiModel = useStore((state) => state.aiModel);
+  const [status, setStatus] = useState<AiRuntimeStatus | null>(null);
+  const [isLoading, setIsLoading] = useState(true);
+
+  useEffect(() => {
+    let cancelled = false;
+    setIsLoading(true);
+    getAiModelStatus(aiModel)
+      .then((data) => {
+        if (!cancelled) setStatus(data);
+      })
+      .catch(() => {
+        if (!cancelled) setStatus(null);
+      })
+      .finally(() => {
+        if (!cancelled) setIsLoading(false);
+      });
+    return () => {
+      cancelled = true;
+    };
+  }, [aiModel]);
+
+  const model = status?.models.find((item) => item.id === aiModel);
+  const ready = Boolean(model?.available);
+  const gpuReady = Boolean(status?.gpu.available);
+  const label = compact
+    ? (gpuReady ? 'GPU' : 'CPU')
+    : `${model?.label || aiModel.toUpperCase()} ${ready ? '可用' : '不可用'}`;
+
+  return (
+    <div
+      className={cn(
+        "inline-flex items-center gap-1.5 rounded border font-mono uppercase",
+        compact ? "w-8 h-8 justify-center text-[9px]" : "px-2 py-0.5 text-[10px]",
+        ready
+          ? "bg-emerald-500/10 text-emerald-400 border-emerald-500/20"
+          : "bg-amber-500/10 text-amber-400 border-amber-500/20"
+      )}
+      title={model?.message || 'AI 模型状态读取中'}
+    >
+      {isLoading ? <Loader2 size={compact ? 12 : 10} className="animate-spin" /> : <Cpu size={compact ? 12 : 10} />}
+      <span>{label}</span>
+    </div>
+  );
+}