Add localization keys for fallback and status messages in UI

Replaced hardcoded status and fallback messages with localized strings across downloader, update, and main UI modules. Updated language files for all supported languages to include new keys for fallback download status, pip timeout, invalid URL, zero selected, and playlist selection dialog title. This improves internationalization and consistency of user-facing messages.

src/gui/ytsage_gui_dialogs/ytsage_dialogs_selection.py

@@ -198,7 +198,7 @@ class SubtitleSelectionDialog(QDialog):
 class PlaylistSelectionDialog(QDialog):
     def __init__(self, playlist_entries, previously_selected_string, parent=None) -> None:
         super().__init__(parent)
-        self.setWindowTitle("Select Playlist Videos")
+        self.setWindowTitle(_("playlist.select_videos_title"))
         self.setMinimumWidth(500)
         self.setMinimumHeight(400)  # Allow more vertical space
 

src/gui/ytsage_gui_dialogs/ytsage_dialogs_update.py

@@ -276,7 +276,7 @@ class UpdateThread(QThread):
                         return False
 
                 except subprocess.TimeoutExpired:
-                    self.update_status.emit("❌ Pip update timed out after 5 minutes")
+                    self.update_status.emit(_("update.pip_timeout"))
                     return False
                 except Exception as e:
                     self.update_status.emit(f"❌ Error during pip update: {e}")

src/gui/ytsage_gui_main.py

@@ -675,7 +675,7 @@ class YTSageApp(QMainWindow, FormatTableMixin, VideoInfoMixin):  # Inherit from
     def analyze_url(self) -> None:
         url = self.url_input.text().strip()
         if not url:
-            self.signals.update_status.emit("Invalid URL or please enter a URL.")
+            self.signals.update_status.emit(_("main_ui.invalid_url_or_enter"))
             return
 
         self.signals.update_status.emit(_("main_ui.analyzing_preparing"))
@@ -1830,7 +1830,7 @@ class YTSageApp(QMainWindow, FormatTableMixin, VideoInfoMixin):  # Inherit from
 
                 # Show playlist selection button
                 # update signal method from QMetaObject.invokeMethod to signals
-                self.signals.playlist_select_btn_text.emit("Select Videos... (All selected)")
+                self.signals.playlist_select_btn_text.emit(_("main_ui.select_videos_all"))
 
                 # update signal method from QMetaObject.invokeMethod to signals
                 self.signals.playlist_select_btn_visible.emit(True)
@@ -1883,10 +1883,10 @@ class YTSageApp(QMainWindow, FormatTableMixin, VideoInfoMixin):  # Inherit from
 
             # Update subtitle UI
             # update signal method from QMetaObject.invokeMethod to signals
-            self.signals.selected_subs_label_text.emit("0 selected")
+            self.signals.selected_subs_label_text.emit(_("main_ui.zero_selected"))
 
             # Update format table
-            self.signals.update_status.emit("Analyzing (95%)... Updating format table")
+            self.signals.update_status.emit(_("main_ui.analyzing_updating_table"))
             self.video_button.setChecked(True)
             self.audio_button.setChecked(False)
             self.filter_formats()