fix: pdf bookmark

for pdfs only select pages not text

frontend/src/locales/en-US.ts

@@ -125,8 +125,12 @@ const enUS = {
     pdfZoomAria: "PDF zoom level",
     pdfLimitationsTitle: "PDF reading",
     pdfLimitationsBody:
-      "This file is a PDF. Some features are limited compared to EPUB: bookmarks and notes are not available, and there are no chapters in the table of contents—only pages.",
+      "PDF reading uses page bookmarks (filled bookmark icon in the toolbar). Passage highlights need selectable text and are not available on scanned pages. The table of contents lists pages, not EPUB-style chapters.",
     pdfLimitationsDismissAria: "Dismiss PDF limitations notice",
+    bookmarkPage: "Bookmark this page",
+    bookmarkPageAria: "Bookmark current page",
+    pageBookmarked: "Page bookmarked",
+    pageAlreadyBookmarked: "This page is already bookmarked",
     backToLibrary: "Back to library",
     prevPage: "Previous page",
     nextPage: "Next page",
@@ -217,6 +221,7 @@ const enUS = {
     highlightBlue: "Blue",
     highlightPurple: "Purple",
     selectTextHint: "Select text in the reader to add a bookmark or note.",
+    pdfPageBookmarkHint: "Use the filled bookmark button in the toolbar to save the current page.",
     showMore: "Show more",
     showLess: "Show less",
     goToPassage: "Go to passage",