Library update (#78)

* Added print functionality to PDF viewer

* feat(pdf): add interactive button support and visibility reveal heuristic

* Moved search state management to MainViewModel and improved search UI interaction.

* Updated `pdfiumandroid` to version 2.0.0 and handled resulting API changes, including nullable page/text page returns and revised native pointer access.

increased compileSdk to 36.

* Fixed Table of Contents (TOC) truncation bug and improved the TOC UI in `PdfViewerScreen`.

- Implemented `getFixedTableOfContents` using reflection to bypass a library issue where sibling nodes were incorrectly truncated during traversal.
- Enhanced the TOC drawer with a nested, expandable tree structure using the new `PdfTocTreeItem` component.
- Added a custom `VerticalScrollbar` with draggable support for better navigation within long TOC lists.
- Integrated `animateColorAsState` and `animateFloatAsState` for smoother UI transitions in the TOC and scrollbar.
- Optimized TOC loading by flattening the tree structure and managing expansion states with `rememberSaveable`.

* Improved zoom pivot calculation and interaction handling in PdfVerticalReader

* Fixed high-res PDF tile bleeding by implementing clipRect in PdfBitmapLayer

* fix(pdf): resolve zoom stuttering, in pagination mode, by removing eager scale snapping

* Added book pinning and library filtering functionality

* Updated folder sync logic, improved metadata extraction, and added persistent banner message while syncing

* build: bump version to 1.0.37 (38)

app/src/main/java/com/aryan/reader/SharedComposables.kt

@@ -84,6 +84,7 @@ import android.content.Context
 import android.content.Intent
 import androidx.browser.customtabs.CustomTabsIntent
 import androidx.compose.foundation.clickable
+import androidx.compose.material.icons.filled.PushPin
 import androidx.compose.material.icons.filled.SelectAll
 import androidx.compose.material3.HorizontalDivider
 import androidx.compose.material3.OutlinedButton
@@ -192,6 +193,7 @@ fun ContextualTopAppBar(
     onNavIconClick: () -> Unit,
     onInfoClick: (() -> Unit)? = null,
     onSelectAllClick: (() -> Unit)? = null,
+    onPinClick: (() -> Unit)? = null,
     onDeleteClick: () -> Unit
 ) {
     CustomTopAppBar(
@@ -202,6 +204,11 @@ fun ContextualTopAppBar(
             }
         },
         actions = {
+            if (onPinClick != null) {
+                IconButton(onClick = onPinClick) {
+                    Icon(Icons.Filled.PushPin, contentDescription = "Pin/Unpin")
+                }
+            }
             if (selectedItemCount == 1 && onInfoClick != null) {
                 IconButton(onClick = onInfoClick) {
                     Icon(Icons.Filled.Info, contentDescription = "Info")