feat(translate): translate a whole playlist so the next episodes are ready (#16)

Co-authored-by: Tri Vo Khac <git@trivk.dev>

src/qml/Actions.qml

@@ -38,6 +38,7 @@ Item {
     signal headerToggleRequested()
     signal contextMenuRequested()
     signal translateRequested()
+    signal translatePlaylistRequested()
     signal editGlossaryRequested()
 
     function seekBy(seconds: real) {
@@ -396,6 +397,13 @@ Item {
         onTriggered: root.translateRequested()
     }
 
+    property Action translatePlaylist: Action {
+        enabled: root.shortcutsEnabled && root.playlist.count > 1 && !root.translator.busy
+        text: KI18n.i18nc("@action", "Translate Whole Playlist into %1", QtPotatoSettings.targetLanguage)
+        icon.name: "translate"
+        onTriggered: root.translatePlaylistRequested()
+    }
+
     property Action editGlossary: Action {
         enabled: root.shortcutsEnabled && root.hasFile && root.mpv.currentUrl.toString().startsWith("file:")
         text: KI18n.i18nc("@action", "Edit Translation Glossary…")