feat(markdown): integrate Markdown component for enhanced text rendering

- Added a reusable Markdown component to render markdown content with styled typography for dark mode.
- Updated KanbanCard to utilize the new Markdown component for displaying feature summaries, improving readability and presentation.
- Included the `react-markdown` library as a dependency for markdown parsing.

Modified: package.json, package-lock.json, markdown.tsx, kanban-card.tsx

app/src/components/ui/markdown.tsx

@@ -0,0 +1,48 @@
+"use client";
+
+import ReactMarkdown from "react-markdown";
+import { cn } from "@/lib/utils";
+
+interface MarkdownProps {
+  children: string;
+  className?: string;
+}
+
+/**
+ * Reusable Markdown component for rendering markdown content
+ * Styled for dark mode with proper typography
+ */
+export function Markdown({ children, className }: MarkdownProps) {
+  return (
+    <div
+      className={cn(
+        "prose prose-sm prose-invert max-w-none",
+        // Headings
+        "[&_h1]:text-xl [&_h1]:text-zinc-200 [&_h1]:font-semibold [&_h1]:mt-4 [&_h1]:mb-2",
+        "[&_h2]:text-lg [&_h2]:text-zinc-200 [&_h2]:font-semibold [&_h2]:mt-4 [&_h2]:mb-2",
+        "[&_h3]:text-base [&_h3]:text-zinc-200 [&_h3]:font-semibold [&_h3]:mt-3 [&_h3]:mb-2",
+        "[&_h4]:text-sm [&_h4]:text-zinc-200 [&_h4]:font-semibold [&_h4]:mt-2 [&_h4]:mb-1",
+        // Paragraphs
+        "[&_p]:text-zinc-300 [&_p]:leading-relaxed [&_p]:my-2",
+        // Lists
+        "[&_ul]:my-2 [&_ul]:pl-4 [&_ol]:my-2 [&_ol]:pl-4",
+        "[&_li]:text-zinc-300 [&_li]:my-0.5",
+        // Code
+        "[&_code]:text-cyan-400 [&_code]:bg-zinc-800/50 [&_code]:px-1.5 [&_code]:py-0.5 [&_code]:rounded [&_code]:text-sm",
+        "[&_pre]:bg-zinc-900/80 [&_pre]:border [&_pre]:border-white/10 [&_pre]:rounded-lg [&_pre]:my-2 [&_pre]:p-3 [&_pre]:overflow-x-auto",
+        "[&_pre_code]:bg-transparent [&_pre_code]:p-0",
+        // Strong/Bold
+        "[&_strong]:text-zinc-200 [&_strong]:font-semibold",
+        // Links
+        "[&_a]:text-blue-400 [&_a]:no-underline hover:[&_a]:underline",
+        // Blockquotes
+        "[&_blockquote]:border-l-2 [&_blockquote]:border-zinc-600 [&_blockquote]:pl-4 [&_blockquote]:text-zinc-400 [&_blockquote]:italic [&_blockquote]:my-2",
+        // Horizontal rules
+        "[&_hr]:border-zinc-700 [&_hr]:my-4",
+        className
+      )}
+    >
+      <ReactMarkdown>{children}</ReactMarkdown>
+    </div>
+  );
+}