修正聊天标题层级字号

使用 Tailwind 重要性修饰覆盖全局标题样式
恢复 H1 到 H3 的清晰字号层级

apps/ai-game-creator-shell/src/components/ChatMarkdownMessage/index.tsx

@@ -106,13 +106,24 @@ const markdownComponents: Components = {
   a: ({ children }) => children,
   img: ({ alt }) => (alt?.trim() ? `图片：${alt}` : '图片已省略'),
   h1: ({ children }) => (
-    <h1 className="m-0 mt-4 text-xl font-bold first:mt-0">{children}</h1>
+    <h1 className="m-0 mt-4 !text-xl font-bold first:mt-0">{children}</h1>
   ),
   h2: ({ children }) => (
-    <h2 className="m-0 mt-4 text-lg font-bold first:mt-0">{children}</h2>
+    <h2 className="m-0 mt-4 !text-lg font-bold first:mt-0">{children}</h2>
   ),
   h3: ({ children }) => (
-    <h3 className="m-0 mt-3 text-base font-semibold first:mt-0">{children}</h3>
+    <h3 className="m-0 mt-3 !text-base font-semibold first:mt-0">{children}</h3>
+  ),
+  h4: ({ children }) => (
+    <h4 className="m-0 mt-3 !text-sm font-semibold first:mt-0">{children}</h4>
+  ),
+  h5: ({ children }) => (
+    <h5 className="m-0 mt-2 !text-sm font-medium first:mt-0">{children}</h5>
+  ),
+  h6: ({ children }) => (
+    <h6 className="m-0 mt-2 !text-xs font-medium uppercase tracking-wide first:mt-0">
+      {children}
+    </h6>
   ),
   p: MarkdownParagraph,
   ul: MarkdownUnorderedList,