First start: create the config file and open the Config view

Without a config file arr-tui refused to start. It now creates an empty
one (private, with its directory) and opens the Config view. A service
with neither address nor key is "not configured", which validation
allows: its client returns ErrNotConfigured without a request, its
indicator stays grey, it is logged once as information, and its lists
say so instead of showing errors.

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

internal/ui/downloads.go

@@ -35,6 +35,7 @@ type downloadsView struct {
 	sab      *sabnzbd.Client
 	sources  []arrSource
 	interval time.Duration
+	sabUnset bool // SABnzbd is not set up: its lists say so instead of "empty"
 
 	root      *tview.Flex
 	summary   *tview.TextView
@@ -210,6 +211,12 @@ func (v *downloadsView) refresh(ctx context.Context) {
 
 	v.app.post(func() {
 		v.app.SetService("SABnzbd", "", qerr)
+		if unset := notConfigured(qerr); unset != v.sabUnset {
+			v.sabUnset = unset
+			v.sabQueue, v.slots, v.done = sabnzbd.Queue{}, nil, nil
+			v.renderQueue()
+			v.renderHistory()
+		}
 		if qerr == nil {
 			v.sabQueue, v.slots, v.paused = queue, queue.Slots, queue.Paused
 			v.renderQueue()
@@ -230,6 +237,14 @@ func (v *downloadsView) refresh(ctx context.Context) {
 	})
 }
 
+// sabPlaceholder is what an empty SABnzbd list says.
+func (v *downloadsView) sabPlaceholder(empty string) string {
+	if v.sabUnset {
+		return "SABnzbd is not configured (Config view, F6)"
+	}
+	return empty
+}
+
 func (v *downloadsView) rebuildArrRows() {
 	v.arrRows = v.arrRows[:0]
 	for _, s := range v.sources {
@@ -331,7 +346,7 @@ func (v *downloadsView) renderQueue() {
 		}
 	}
 	fill(v.queue, 0, rows)
-	restoreSelection(v.queue, len(rows), selRow, "Queue is empty")
+	restoreSelection(v.queue, len(rows), selRow, v.sabPlaceholder("Queue is empty"))
 }
 
 func (v *downloadsView) renderArr() {
@@ -414,7 +429,7 @@ func (v *downloadsView) renderHistory() {
 		}
 	}
 	fill(v.history, 0, rows)
-	restoreSelection(v.history, len(rows), selRow, "No history")
+	restoreSelection(v.history, len(rows), selRow, v.sabPlaceholder("No history"))
 }
 
 // act runs an action off the UI goroutine, reports the outcome and refreshes.