Add mnemonic mute controls

ui_tree_test.go

@@ -20,6 +20,42 @@ func TestMatchesVolumeResetKeyAcceptsBothTerminalBackspaces(t *testing.T) {
 	}
 }
 
+func TestTreeMuteDefaultMatchesLowerAndUpperM(t *testing.T) {
+	configured := uiterm.KeyM
+	for _, ch := range []rune{'m', 'M'} {
+		if !matchesCharacterHotkey(&configured, ch) {
+			t.Errorf("%q did not match tree mute binding", ch)
+		}
+	}
+}
+
+func TestTreeItemDistinguishesMuteKinds(t *testing.T) {
+	tests := []struct {
+		name string
+		user func() *gumble.User
+		want string
+	}{
+		{
+			name: "local mute",
+			user: func() *gumble.User {
+				u := &gumble.User{Name: "Username"}
+				u.SetLocallyMuted(true)
+				return u
+			},
+			want: "[LOCALLY MUTED] Username",
+		},
+		{name: "server mute", user: func() *gumble.User { return &gumble.User{Name: "Username", Muted: true} }, want: "[SERVER MUTED] Username"},
+		{name: "self mute", user: func() *gumble.User { return &gumble.User{Name: "Username", SelfMuted: true} }, want: "[SELF MUTED] Username"},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := (TreeItem{User: tt.user()}).String(); got != tt.want {
+				t.Fatalf("display = %q, want %q", got, tt.want)
+			}
+		})
+	}
+}
+
 // Regression: rebuilding the channel tree ranged protocol-owned maps without
 // Client.Do while TCP handlers could add or remove users/channels.
 func TestTreeItemBuildReadsMapsUnderClientSnapshot(t *testing.T) {