chore(react): add back Ctrl+Enter for markdown import

apps/client/src/widgets/react/Button.tsx

@@ -0,0 +1,37 @@
+import { useEffect, useRef } from "preact/hooks";
+import shortcuts from "../../services/shortcuts";
+
+interface ButtonProps {
+    text: string;
+    className?: string;
+    keyboardShortcut?: string;
+    onClick: () => void;
+}
+
+export default function Button({ className, text, onClick, keyboardShortcut }: ButtonProps) {
+    const classes: string[] = ["btn"];
+    classes.push("btn-primary");
+    if (className) {
+        classes.push(className);
+    }
+
+    const buttonRef = useRef<HTMLButtonElement>(null);
+    const splitShortcut = (keyboardShortcut ?? "").split("+");
+
+    return (
+        <button
+            className={classes.join(" ")}
+            type="button"
+            onClick={onClick}
+            ref={buttonRef}
+        >
+            {text} {keyboardShortcut && (
+                splitShortcut.map((key, index) => (
+                    <>
+                        <kbd key={index}>{key.toUpperCase()}</kbd>{ index < splitShortcut.length - 1 ? "+" : "" }
+                    </>
+                ))
+            )}
+        </button>
+    );
+}