Fix playlist scrolling showing only one track on page boundary (#185)

Replace paged scrolling with smooth scrolling for song tables. The old
paged mode would create incomplete visual pages when API page size
didn't divide evenly by visible rows, causing the UI to briefly show
just 1 song before loading the next page. Smooth scrolling keeps the
selected item visible and scrolls one item at a time, providing a better
user experience.

Author: LargeModGames

src/tui/ui/tables.rs

@@ -691,8 +691,7 @@ fn draw_table(
     .map(|height| height as usize)
     .unwrap_or(0);
 
-  let use_page_scroll = header.id == TableId::Song;
-  let offset = table_scroll_offset(selected_index, visible_rows, use_page_scroll);
+  let offset = table_scroll_offset(selected_index, visible_rows);
 
   let rows = items.iter().skip(offset).enumerate().map(|(i, item)| {
     let mut formatted_row = item.format.clone();
@@ -773,14 +772,10 @@ fn draw_table(
   f.render_widget(table, layout_chunk);
 }
 
-fn table_scroll_offset(selected_index: usize, visible_rows: usize, paged: bool) -> usize {
+fn table_scroll_offset(selected_index: usize, visible_rows: usize) -> usize {
   if visible_rows == 0 {
     return 0;
   }
 
-  if paged {
-    (selected_index / visible_rows) * visible_rows
-  } else {
-    selected_index.saturating_sub(visible_rows.saturating_sub(1))
-  }
+  selected_index.saturating_sub(visible_rows.saturating_sub(1))
 }