feat(ui): add GoBackButton component with animated hover and history check

app/(app)/trash/components/TrashHeader.tsx

@@ -5,8 +5,8 @@
 
 "use client";
 
-import { ArrowLeft, Trash2 } from "lucide-react";
-import Link from "next/link";
+import { GoBackButton } from "@/app/components/ui/buttons/GoBackButton";
+import { Trash2 } from "lucide-react";
 
 /**
  * Renders the trash page header featuring title details, an indicator icon,
@@ -29,16 +29,7 @@ export default function TrashHeader() {
         </div>
       </div>
 
-      <Link
-        href="/dashboard"
-        className="inline-flex items-center gap-2 text-xs text-primary hover:text-primary-hover transition-colors mb-6 group"
-      >
-        <ArrowLeft
-          size={14}
-          className="group-hover:-translate-x-1 transition-transform"
-        />
-        Back to Dashboard
-      </Link>
+      <GoBackButton fallbackUrl="/dashboard" label="Dashboard" />
     </>
   );
 }

app/components/ui/buttons/GoBackButton.tsx

@@ -0,0 +1,85 @@
+/**
+ * @file components/ui/buttons/GoBackButton.tsx
+ * @description Client component rendering an interactive back button with intelligent history checking and animated hover effects.
+ */
+
+"use client";
+
+import { useRouter } from "next/navigation";
+import { ArrowLeft } from "lucide-react";
+import { ComponentPropsWithoutRef } from "react";
+
+/**
+ * Properties for the GoBackButton component.
+ *
+ * @interface GoBackButtonProps
+ * @extends {ComponentPropsWithoutRef<"button">}
+ * @property {string} [fallbackUrl] - The backup route URL to navigate to if no browser history exists.
+ * @property {string} [label] - The text label displayed next to the arrow icon.
+ */
+interface GoBackButtonProps extends ComponentPropsWithoutRef<"button"> {
+  fallbackUrl?: string;
+  label?: string;
+}
+
+/**
+ * Renders a back button that navigates to the previous history entry if available,
+ * or falls back to a default URL, featuring an animated left arrow icon and underline effects.
+ *
+ * @param {GoBackButtonProps} props - The component props.
+ * @returns {JSX.Element} The rendered go back button component.
+ */
+export function GoBackButton({
+  fallbackUrl = "/",
+  label = "previous page",
+  className = "",
+  onClick,
+  ...props
+}: GoBackButtonProps) {
+  const router = useRouter();
+
+  /**
+   * Handles the click event, triggering custom click actions if provided,
+   * and determining whether to pop history or redirect to the fallback URL.
+   *
+   * @param {React.MouseEvent<HTMLButtonElement>} e - The mouse event object.
+   */
+  const handleBack = (e: React.MouseEvent<HTMLButtonElement>) => {
+    if (onClick) {
+      onClick(e);
+    }
+    if (e.defaultPrevented) return;
+    e.preventDefault();
+
+    const hasHistory = window.history.state && window.history.state.idx > 0;
+
+    if (hasHistory) {
+      router.back();
+    } else {
+      router.push(fallbackUrl);
+    }
+  };
+
+  return (
+    <button
+      type="button"
+      onClick={handleBack}
+      className={`inline-flex items-center gap-2 text-xs text-primary hover:text-primary-hover transition-colors group bg-transparent border-none p-0 cursor-pointer ${className}`}
+      {...props}
+    >
+      <ArrowLeft
+        size={14}
+        aria-hidden="true"
+        className="group-hover:-translate-x-1 transition-transform shrink-0"
+      />
+
+      <span className="relative pb-0.5">
+        Back to {label}
+        <span
+          className="absolute left-0 bottom-0 h-px w-0 bg-primary transition-all duration-300 ease-in-out group-hover:w-full"
+          aria-hidden="true"
+        />
+      </span>
+    </button>
+  );
+}

app/imprint/page.tsx

@@ -3,6 +3,8 @@
  * @description Server component rendering the legal notice (imprint) page with a title header and back button navigation.
  */
 
+import { GoBackButton } from "../components/ui/buttons/GoBackButton";
+
 /**
  * Renders the imprint/legal notice page containing the main title and layout container.
  *
@@ -16,6 +18,7 @@ export default async function ImprintPage() {
         <h1 className="text-2xl font-bold text-foreground mb-1 tracking-tight">
           Legal Notice<span className="text-primary">.</span>
         </h1>
+        <GoBackButton />
         <div className="space-y-6 text-sm mt-3 text-foreground-muted leading-relaxed">
           {/* Information in accordance with § 5 DDG & § 18 MStV */}
           <div className="rounded-2xl border border-border bg-card p-6 shadow-xl space-y-3">
@@ -23,7 +26,7 @@ export default async function ImprintPage() {
               <span className="text-primary">//</span> Information Pursuant to §
               5 DDG
             </h2>
-            <div className="font-mono text-xs bg-background/60 p-4 rounded-xl border border-border text-foreground space-y-1">
+            <div className="font-mono text-xs bg-background/60 p-4 rounded-xl border border-border text-foreground">
               <p className="font-semibold">André Kempf</p>
               <p className="text-primary-hover">Full-Stack Web Developer</p>
               <p>Großschneidersweg 2a</p>

app/privacy/page.tsx

@@ -3,6 +3,8 @@
  * @description Server component rendering the privacy policy page with a title header and back button navigation.
  */
 
+import { GoBackButton } from "../components/ui/buttons/GoBackButton";
+
 /**
  * Renders the privacy policy page containing the main title and layout container alongside a back navigation button.
  *
@@ -16,6 +18,7 @@ export default async function PrivacyPage() {
         <h1 className="text-2xl font-bold text-foreground mb-1 tracking-tight">
           Privacy Policy<span className="text-primary">.</span>
         </h1>
+        <GoBackButton />
         <div className="space-y-6 text-sm mt-3 text-foreground-muted leading-relaxed">
           {/* Overview */}
           <div className="rounded-2xl border border-border bg-card p-6 shadow-xl space-y-4">