Add popup notifications, log view (F5) and context-sensitive key hints (M9)

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

internal/ui/notify_test.go

@@ -0,0 +1,26 @@
+package ui
+
+import (
+	"testing"
+
+	"github.com/rivo/tview"
+)
+
+func TestPlainText(t *testing.T) {
+	for _, tc := range []struct{ in, want string }{
+		{"[green]Done[-]", "Done"},
+		{"[red]" + tview.Escape("Movie [1080p] failed"), "Movie [1080p] failed"},
+		{"plain", "plain"},
+		{"[yellow]a [::b]b[::-]", "a b"},
+	} {
+		if got := plainText(tc.in); got != tc.want {
+			t.Errorf("plainText(%q) = %q, want %q", tc.in, got, tc.want)
+		}
+	}
+}
+
+func TestToastProgress(t *testing.T) {
+	if !(toast{text: "Searching…"}).progress() || (toast{text: "Done"}).progress() {
+		t.Error("progress detection wrong")
+	}
+}