Add PDF modal and selectedPost setter

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

node_modules/@rolldown/pluginutils/dist/utils.js

@@ -0,0 +1,17 @@
+const postfixRE = /[?#].*$/;
+export function cleanUrl(url) {
+    return url.replace(postfixRE, '');
+}
+export function extractQueryWithoutFragment(url) {
+    const questionMarkIndex = url.indexOf('?');
+    if (questionMarkIndex === -1) {
+        return '';
+    }
+    const fragmentIndex = url.indexOf('#', questionMarkIndex); // Search for # after ?
+    if (fragmentIndex === -1) {
+        return url.substring(questionMarkIndex);
+    }
+    else {
+        return url.substring(questionMarkIndex, fragmentIndex);
+    }
+}