restore as a page (#87)

* feat: add custom restore target directory

Adds the ability to restore snapshots to a custom directory instead of
only the original path. Closes #12.

Changes:
- Add target parameter to restore API endpoint
- Add directory picker UI in file browser restore dialog
- Add target input field in snapshot restore form
- Create reusable PathSelector component

Note: Run `bun run gen:api-client` after merging to regenerate types.

* refactor: path selector design

* refactor: unify restore snapshot dialogs

* refactor: restore snapshot as a page

* chore: fix liniting issues

* chore(create-notification): remove un-used prop

---------

Co-authored-by: Deepseek1 <Deepseek1@users.noreply.github.com>

app/client/components/path-selector.tsx

@@ -0,0 +1,39 @@
+import { useState } from "react";
+import { DirectoryBrowser } from "./directory-browser";
+import { Button } from "./ui/button";
+
+type Props = {
+	value: string;
+	onChange: (path: string) => void;
+	label?: string;
+};
+
+export const PathSelector = ({ value, onChange }: Props) => {
+	const [showBrowser, setShowBrowser] = useState(false);
+
+	if (showBrowser) {
+		return (
+			<div className="space-y-2">
+				<DirectoryBrowser
+					onSelectPath={(path) => {
+						onChange(path);
+						setShowBrowser(false);
+					}}
+					selectedPath={value}
+				/>
+				<Button type="button" variant="ghost" size="sm" onClick={() => setShowBrowser(false)}>
+					Cancel
+				</Button>
+			</div>
+		);
+	}
+
+	return (
+		<div className="flex items-center gap-2">
+			<div className="flex-1 text-sm font-mono bg-muted px-3 py-2 rounded-md border">{value}</div>
+			<Button type="button" variant="outline" onClick={() => setShowBrowser(true)} size="sm">
+				Change
+			</Button>
+		</div>
+	);
+};