fix: pdf bookmark

for pdfs only select pages not text

frontend/src/components/reader/BookMarkersPanel.tsx

@@ -12,6 +12,7 @@ interface BookMarkersPanelProps {
   isOpen: boolean;
   onClose: () => void;
   onGoToPassage: (marker: MarkerEntry) => void;
+  emptyHintKey?: string;
 }
 
 export function BookMarkersPanel({
@@ -19,6 +20,7 @@ export function BookMarkersPanel({
   isOpen,
   onClose,
   onGoToPassage,
+  emptyHintKey = "annotations.selectTextHint",
 }: BookMarkersPanelProps) {
   const { t } = useTranslation();
   const { markers, loadBookmarks, removeBookmark, state } = useAnnotations();
@@ -43,7 +45,7 @@ export function BookMarkersPanel({
           {state.bookmarksLoading ? (
             <p className="annotations-loading">{t("annotations.loading")}</p>
           ) : markers.length === 0 ? (
-            <p className="annotations-empty">{t("annotations.selectTextHint")}</p>
+            <p className="annotations-empty">{t(emptyHintKey)}</p>
           ) : (
             <ul className="marker-thread-list">
               {markers.map((m) => (
@@ -51,13 +53,15 @@ export function BookMarkersPanel({
                   {m.chapter_title && (
                     <span className="marker-thread-chapter">{m.chapter_title}</span>
                   )}
-                  {m.location_text && (
+                  {m.location_text ? (
                     <CollapsibleMarkerPassage
                       text={m.location_text}
                       highlightColor={m.highlight_color}
                       className="annotation-quote"
                     />
-                  )}
+                  ) : m.chapter_title ? (
+                    <span className="annotation-quote marker-page-label">{m.chapter_title}</span>
+                  ) : null}
                   {m.content ? (
                     <CollapsibleMarkerThought text={m.content} />
                   ) : (