Library: keep the place after removing a title

The list is reloaded after a removal and the selection follows the
selected title by id; the removed title is gone, so it fell back to the
top. Now a title that has left the library hands its row to the one that
moved up into it (or the new last one). A title that is only filtered out
still starts the list from the top.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_019reK4DUGYqDUjniWYJvwUW

internal/ui/library.go

@@ -391,9 +391,9 @@ func (v *libraryView) render() {
 }
 
 func (v *libraryView) renderPane(p *libPane) {
-	selID := -1
+	selID, prevRow := -1, 0
 	if r, _ := p.table.GetSelection(); r >= 1 && r <= len(p.shown) {
-		selID = p.shown[r-1].id
+		selID, prevRow = p.shown[r-1].id, r
 	}
 	p.shown = filterItems(p.all, p.filter, p.text, p.attr)
 
@@ -408,6 +408,13 @@ func (v *libraryView) renderPane(p *libPane) {
 			selRow = i + 1
 		}
 	}
+	if selRow == 0 && selID != -1 && !containsItem(p.all, selID) {
+		// The selected title is gone from the library (removed): stay at its
+		// place, on the title that moved up into it (or the new last one),
+		// instead of jumping to the top. A title that is only filtered out
+		// still starts the list from the top.
+		selRow = min(prevRow, len(p.shown))
+	}
 	placeholder := "Nothing matches the filter"
 	switch {
 	case p.err != nil && !p.loaded:
@@ -437,6 +444,15 @@ func (v *libraryView) renderPane(p *libPane) {
 	p.table.SetTitle(title + " ")
 }
 
+func containsItem(items []libItem, id int) bool {
+	for _, it := range items {
+		if it.id == id {
+			return true
+		}
+	}
+	return false
+}
+
 func (v *libraryView) renderDetails() {
 	if it, ok := v.selected(); ok {
 		v.details.Show(it.details, it.cover)