Add About section with attribution to Settings page

Credits Donkie for original Spoolman and Claude for UX enhancements.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

client/src/pages/settings/generalSettings.tsx

@@ -144,6 +144,10 @@ export function GeneralSettings() {
 
       <BackupRestore messageApi={messageApi} t={t} />
 
+      <Divider />
+
+      <AboutSection />
+
       {contextHolder}
     </>
   );
@@ -447,3 +451,27 @@ function BackupRestore({ messageApi, t }: BackupRestoreProps) {
     </div>
   );
 }
+
+function AboutSection() {
+  return (
+    <div style={{ maxWidth: "600px", margin: "0 auto" }}>
+      <h3>About</h3>
+      <p style={{ color: "#888", lineHeight: 1.8 }}>
+        Based on{" "}
+        <a href="https://github.com/Donkie/Spoolman" target="_blank" rel="noopener noreferrer">
+          Spoolman
+        </a>{" "}
+        by{" "}
+        <a href="https://github.com/Donkie" target="_blank" rel="noopener noreferrer">
+          Donkie
+        </a>
+        <br />
+        UX enhancements developed with{" "}
+        <a href="https://claude.ai" target="_blank" rel="noopener noreferrer">
+          Claude
+        </a>{" "}
+        (Anthropic)
+      </p>
+    </div>
+  );
+}