feat: allow collapsing widget content, add categories widget

(cherry picked from commit 9a4ca8f6163d5e1375aa7c612e1338cce5a8c0b5)

src/utils/url-utils.ts

@@ -3,3 +3,16 @@ export function pathsEqual(path1: string, path2: string) {
     const normalizedPath2 = path2.replace(/^\/|\/$/g, '').toLowerCase();
     return normalizedPath1 === normalizedPath2;
 }
+
+export function getPostUrlBySlug(slug: string): string | null {
+    if (!slug)
+        return null;
+    return `/posts/${slug}`;
+}
+
+export function getCategoryUrl(category: string): string | null {
+    if (!category)
+        return null;
+    return `/archive/category/${category}`;
+}
+