Library: mark titles that are downloading

While the Library is visible it reads the Radarr and Sonarr queues (on
opening, every 10 s, and shortly after a grab) and matches them to the
titles by movieId / seriesId. Those titles get a blue dot instead of the
green or grey one, and their details say how far the download is.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

internal/ui/library.go

@@ -67,6 +67,19 @@ var libFilters = []struct {
 	{"unmonitored", func(i libItem) bool { return !i.monitored }},
 }
 
+// libMark is the mark before a library title: blue while it is in the
+// download queue, else green when monitored; filled when monitored, hollow
+// when not.
+func libMark(monitored, downloading bool) string {
+	if !downloading {
+		return monMark(monitored)
+	}
+	if monitored {
+		return "[blue]●[-]"
+	}
+	return "[blue]○[-]"
+}
+
 func monMark(monitored bool) string {
 	if monitored {
 		return "[green]●[-]"
@@ -215,6 +228,10 @@ type libraryView struct {
 	filePending int
 
 	refreshDialog func() // re-evaluates the options of the open filter dialog
+
+	// Titles in the Radarr/Sonarr download queue, by kind and id (libqueue.go).
+	downloading [2]map[int]dlInfo
+	queueStop   chan struct{}
 }
 
 type seriesFiles struct {
@@ -317,6 +334,7 @@ func (v *libraryView) activate() {
 	v.app.app.SetFocus(v.pane().table)
 	v.render()
 	v.reload()
+	v.startQueueWatch()
 }
 
 // reload fetches both lists in parallel.
@@ -404,7 +422,8 @@ func (v *libraryView) renderPane(p *libPane) {
 	header(p.table, 0, "Title", "Status", "Size")
 	selRow := 0
 	for i, it := range p.shown {
-		title := titleCell{prefix: monMark(it.monitored) + " ", title: it.label}
+		_, dl := v.downloading[p.kind][it.id]
+		title := titleCell{prefix: libMark(it.monitored, dl) + " ", title: it.label}
 		p.table.SetCell(i+1, 0, tview.NewTableCell(title.fit(0)).SetExpansion(1).SetReference(title))
 		p.table.SetCell(i+1, 1, tview.NewTableCell(it.status))
 		p.table.SetCell(i+1, 2, tview.NewTableCell(it.size).SetAlign(tview.AlignRight))
@@ -532,7 +551,11 @@ func containsItem(items []libItem, id int) bool {
 
 func (v *libraryView) renderDetails() {
 	if it, ok := v.selected(); ok {
-		v.details.Show(it.details, it.cover)
+		d := it.details
+		if dl, ok := v.downloading[v.cur][it.id]; ok {
+			d.head += dl.dlLine()
+		}
+		v.details.Show(d, it.cover)
 		return
 	}
 	v.details.Clear()