feat(header): adiciona link para changelog no dashboard

- Cria componente ChangelogLink com tooltip
- Adiciona link para /changelog ao lado do feedback
- Segue o padrão dos componentes existentes

components/changelog/changelog-link.tsx

@@ -0,0 +1,34 @@
+"use client";
+
+import { buttonVariants } from "@/components/ui/button";
+import {
+  Tooltip,
+  TooltipContent,
+  TooltipTrigger,
+} from "@/components/ui/tooltip";
+import { cn } from "@/lib/utils";
+import { RiGitCommitLine } from "@remixicon/react";
+import Link from "next/link";
+
+export function ChangelogLink() {
+  return (
+    <Tooltip>
+      <TooltipTrigger asChild>
+        <Link
+          href="/changelog"
+          className={cn(
+            buttonVariants({ variant: "ghost", size: "icon-sm" }),
+            "group relative text-muted-foreground transition-all duration-200",
+            "hover:text-foreground focus-visible:ring-2 focus-visible:ring-primary/40 border",
+          )}
+        >
+          <RiGitCommitLine className="size-4" />
+          <span className="sr-only">Changelog</span>
+        </Link>
+      </TooltipTrigger>
+      <TooltipContent side="bottom" sideOffset={8}>
+        Changelog
+      </TooltipContent>
+    </Tooltip>
+  );
+}