feat: AI市场分析功能

- 后端：AI分析服务、工具调用、定时任务
- 前端：报告列表、详情页、Mermaid图表支持
- 支持OpenAI API兼容模型
- 收盘后自动分析生成报告

src/components/Mermaid.tsx

@@ -0,0 +1,53 @@
+import { useEffect, useRef, useState } from "react";
+import mermaid from "mermaid";
+
+mermaid.initialize({
+  startOnLoad: false,
+  theme: "dark",
+  themeVariables: {
+    primaryColor: "#21262d",
+    primaryTextColor: "#e6edf3",
+    primaryBorderColor: "#30363d",
+    lineColor: "#58a6ff",
+    secondaryColor: "#161b22",
+    tertiaryColor: "#0d1117",
+    fontFamily: "inherit",
+    fontSize: "14px",
+  },
+});
+
+interface MermaidProps {
+  chart: string;
+}
+
+export function Mermaid({ chart }: MermaidProps) {
+  const ref = useRef<HTMLDivElement>(null);
+  const [svg, setSvg] = useState("");
+  const [error, setError] = useState("");
+
+  useEffect(() => {
+    if (!ref.current) return;
+    const id = `mermaid-${Math.random().toString(36).slice(2, 9)}`;
+
+    mermaid
+      .render(id, chart)
+      .then(({ svg }) => setSvg(svg))
+      .catch((err) => setError(err.message || "图表渲染失败"));
+  }, [chart]);
+
+  if (error) {
+    return (
+      <pre className="bg-[#0d1117] border border-[#f85149]/30 rounded p-3 text-sm text-[#f85149] overflow-x-auto">
+        {error}
+      </pre>
+    );
+  }
+
+  return (
+    <div
+      ref={ref}
+      className="bg-[#0d1117] rounded p-3 overflow-x-auto my-2 flex justify-center [&>svg]:max-w-full"
+      dangerouslySetInnerHTML={{ __html: svg }}
+    />
+  );
+}