feat(app): add persistence of settings across sessions

src/components/SettingsActions/SettingsActions.tsx

@@ -0,0 +1,53 @@
+import React from "react";
+import { ArrowCounterClockwise, CheckCircle, Link } from "phosphor-react";
+import { useRecoilValue, useResetRecoilState } from "recoil";
+import { iconWeightAtom, iconSizeAtom, iconColorAtom } from "../../state/atoms";
+import "./SettingsActions.css";
+import useTransientState from "../../hooks/useTransientState";
+import { resetSettingsSelector } from "../../state/selectors";
+
+const SettingsActions: React.FC = () => {
+  const weight = useRecoilValue(iconWeightAtom);
+  const size = useRecoilValue(iconSizeAtom);
+  const color = useRecoilValue(iconColorAtom);
+  const reset = useResetRecoilState(resetSettingsSelector);
+
+  const [copied, setCopied] = useTransientState<boolean>(false, 2000);
+
+  const copyDeepLinkToClipboard = () => {
+    const paramString = new URLSearchParams([
+      ["weight", weight.toString()],
+      ["size", size.toString()],
+      ["color", color.replace("#", "")],
+    ]).toString();
+    void navigator.clipboard?.writeText(
+      `${window.location.host}?${paramString}`
+    );
+    setCopied(true);
+  };
+
+  return (
+    <>
+      <button
+        className="action-button"
+        title="Restore default settings"
+        onClick={reset}
+      >
+        <ArrowCounterClockwise size={24} />
+      </button>
+      <button
+        className="action-button"
+        title="Copy URL for current settings"
+        onClick={copyDeepLinkToClipboard}
+      >
+        {copied ? (
+          <CheckCircle size={24} color="#1FA647" weight="fill" />
+        ) : (
+          <Link size={24} />
+        )}
+      </button>
+    </>
+  );
+};
+
+export default SettingsActions;