fix: viewer PDF (TOC, largeur) et plein ecran assistant (BUG-061 a BUG-063)

frontend/style.css

@@ -1473,6 +1473,14 @@ select {
   margin: 0 auto;
   max-width: 1200px;
 }
+
+/* Full-bleed viewers (PDF, images) must use the whole width when the
+   navigation sidebar is hidden instead of the centered reading column. */
+.sidebar.hidden ~ .content-wrapper .content-area:has(.pdf-viewer-container),
+.sidebar.hidden ~ .content-wrapper .content-area:has(.image-viewer-container) {
+  margin: 0;
+  max-width: none;
+}
 .content-area::-webkit-scrollbar {
   width: 8px;
 }
@@ -9492,7 +9500,9 @@ body.popup-mode .content-area {
 .bookslm-toolbar .ai-picker { margin-left: 0; padding-left: 0; border-left: none;
   flex-wrap: wrap; row-gap: 4px; }
 .bookslm-toolbar .ai-picker select { max-width: 220px; }
-.bookslm-panel.fullscreen { width: 100vw; }
+/* `!important` is required: the panel width is also written inline by the
+   resize handle / persisted width, and an inline style would otherwise win. */
+.bookslm-panel.fullscreen { width: 100vw !important; }
 .bookslm-status { padding: 6px 16px; font-size: 12px; color: var(--text-secondary);
   border-bottom: 1px solid var(--border); display: flex; gap: 12px; align-items: center; }
 .bookslm-status .bookslm-status-text { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }