feat: Mehrsprachige Oberfläche EN/DE (Paket G)

app/config.py

@@ -16,6 +16,8 @@
 
 from app.writing_presets import DEFAULT_PRESET_KEY, WRITING_PRESET_KEYS
 
+from app.i18n import LANGUAGES as I18N_LANGUAGES, DEFAULT_LANGUAGE as I18N_DEFAULT_LANGUAGE
+
 logger = logging.getLogger("blitztext.config")
 
 DEFAULTS: dict[str, Any] = {
@@ -45,6 +47,7 @@
         "custom_terms": [],
         "writing_preset": DEFAULT_PRESET_KEY,
     },
+    "ui_language": I18N_DEFAULT_LANGUAGE,
 }
 
 VALID_MODELS = {"tiny", "base", "small", "medium", "large", "large-v2", "large-v3", "large-v3-turbo"}
@@ -56,6 +59,7 @@
 VALID_LLM_PROVIDERS = {"openai", "openrouter", "custom"}
 VALID_TTS_PROVIDERS = {"piper", "openai"}
 VALID_OPENAI_TTS_VOICES = {"alloy", "ash", "ballad", "coral", "echo", "fable", "nova", "onyx", "sage", "shimmer", "verse", "marin", "cedar"}
+VALID_UI_LANGUAGES = set(I18N_LANGUAGES)
 BASE_URL_RE = re.compile(r"^https?://", re.IGNORECASE)
 VALID_HOTKEY_KEYS = {
     "KEY_LEFTALT", "KEY_RIGHTALT", "KEY_RIGHTCTRL", "KEY_LEFTCTRL",
@@ -199,6 +203,18 @@ def language(self) -> str:
     def language(self, value: str) -> None:
         self._data["language"] = value
 
+    @property
+    def ui_language(self) -> str:
+        """Gebe die UI-Sprache zurück, validiert."""
+        value = self._data.get("ui_language", DEFAULTS["ui_language"])
+        return value if value in VALID_UI_LANGUAGES else DEFAULTS["ui_language"]
+
+    @ui_language.setter
+    def ui_language(self, value: str) -> None:
+        if value not in VALID_UI_LANGUAGES:
+            raise ValueError(f"Ungueltige UI-Sprache: {value!r}. Gueltig: {sorted(VALID_UI_LANGUAGES)}")
+        self._data["ui_language"] = value
+
     @property
     def backend(self) -> str:
         return self._data["backend"]
@@ -375,6 +391,8 @@ def _validate_and_sanitize(self) -> None:
             self._data["model"] = "base"
         if self._data.get("backend") not in VALID_BACKENDS:
             self._data["backend"] = "openai-whisper"
+        if self._data.get("ui_language") not in VALID_UI_LANGUAGES:
+            self._data["ui_language"] = DEFAULTS["ui_language"]
         if self._data.get("hotkey_mode") not in VALID_HOTKEY_MODES:
             self._data["hotkey_mode"] = "toggle"
         if self._data.get("transcription_hotkey") not in VALID_HOTKEY_KEYS:

app/history_panel.py

@@ -26,6 +26,8 @@
     QWidget,
 )
 
+from app.i18n import t
+
 logger = logging.getLogger("blitztext.history")
 
 
@@ -58,7 +60,7 @@ def save_dictation_note(folder: str, text: str) -> Optional[str]:
         filename = now.strftime("%Y-%m-%d_%H-%M-%S") + ".md"
         heading = now.strftime("%Y-%m-%d %H:%M:%S")
         path = os.path.join(resolved, filename)
-        content = f"# Diktat {heading}\n\n{text}\n"
+        content = f"# {t('history.note.heading').format(heading=heading)}\n\n{text}\n"
         fd = os.open(path, os.O_WRONLY | os.O_CREAT | os.O_EXCL, 0o600)
         with os.fdopen(fd, "w", encoding="utf-8") as f:
             f.write(content)
@@ -92,10 +94,10 @@ def save_merged_dictation(folder: str, combined: str) -> Optional[str]:
     try:
         os.makedirs(resolved, exist_ok=True)
         now = datetime.now()
-        filename = "Diktat-zusammengefuehrt_" + now.strftime("%Y-%m-%d_%H-%M-%S") + ".md"
+        filename = t("history.note.merged_filename_prefix") + now.strftime("%Y-%m-%d_%H-%M-%S") + ".md"
         heading = now.strftime("%Y-%m-%d %H:%M:%S")
         path = os.path.join(resolved, filename)
-        content = f"# Diktat (zusammengefuehrt) {heading}\n\n{combined}\n"
+        content = f"# {t('history.note.merged_heading').format(heading=heading)}\n\n{combined}\n"
         fd = os.open(path, os.O_WRONLY | os.O_CREAT | os.O_TRUNC, 0o600)
         with os.fdopen(fd, "w", encoding="utf-8") as f:
             f.write(content)
@@ -171,21 +173,21 @@ def __init__(self, entry: HistoryEntry, parent: Optional[QWidget] = None) -> Non
         layout.setSpacing(3)
 
         top_row = QHBoxLayout()
-        meta_text = f"{entry.timestamp}  ·  {entry.word_count} Wörter"
+        meta_text = t("history.entry.meta").format(timestamp=entry.timestamp, count=entry.word_count)
         if entry.is_dictation:
             meta_text = f"\U0001f3a4 {meta_text}"
         meta_label = QLabel(meta_text)
         meta_label.setStyleSheet("color: palette(mid); font-size: 11px;")
         top_row.addWidget(meta_label, 1)
 
         self._btn_copy = QPushButton("\U0001f4cb")
-        self._btn_copy.setToolTip("In Zwischenablage kopieren")
+        self._btn_copy.setToolTip(t("history.tooltip.copy"))
         self._btn_copy.setFixedSize(28, 24)
         self._btn_copy.clicked.connect(self._copy_to_clipboard)
         top_row.addWidget(self._btn_copy)
 
         btn_delete = QPushButton("✕")
-        btn_delete.setToolTip("Eintrag löschen")
+        btn_delete.setToolTip(t("history.tooltip.delete"))
         btn_delete.setFixedSize(28, 24)
         btn_delete.clicked.connect(lambda: self.deleted.emit(self.entry))
         top_row.addWidget(btn_delete)
@@ -244,17 +246,17 @@ def _setup_ui(self) -> None:
         layout.setSpacing(4)
 
         header_row = QHBoxLayout()
-        self._header_label = QLabel("Verlauf (0)")
+        self._header_label = QLabel(t("history.header").format(count=0))
         self._header_label.setStyleSheet("font-size: 13px; font-weight: bold;")
         header_row.addWidget(self._header_label, 1)
 
-        self._btn_merge = QPushButton("Zusammenführen")
-        self._btn_merge.setToolTip("Alle Diktat-Einträge kombinieren, als Datei speichern und kopieren")
+        self._btn_merge = QPushButton(t("history.button.merge"))
+        self._btn_merge.setToolTip(t("history.tooltip.merge"))
         self._btn_merge.clicked.connect(self._merge_dictation)
         self._btn_merge.hide()
         header_row.addWidget(self._btn_merge)
 
-        self._btn_clear = QPushButton("Alles löschen")
+        self._btn_clear = QPushButton(t("history.button.clear_all"))
         self._btn_clear.clicked.connect(self._on_clear_clicked)
         header_row.addWidget(self._btn_clear)
 
@@ -319,15 +321,15 @@ def _remove_widget_for_entry(self, entry: HistoryEntry) -> None:
     def _on_clear_clicked(self) -> None:
         if not self._clear_armed:
             self._clear_armed = True
-            self._btn_clear.setText("Sicher?")
+            self._btn_clear.setText(t("history.button.confirm_clear"))
             self._btn_clear.setStyleSheet("color: #f44336; font-weight: bold;")
             QTimer.singleShot(3000, self._disarm_clear)
         else:
             self.clear_all()
 
     def _disarm_clear(self) -> None:
         self._clear_armed = False
-        self._btn_clear.setText("Alles löschen")
+        self._btn_clear.setText(t("history.button.clear_all"))
         self._btn_clear.setStyleSheet("")
 
     def clear_all(self) -> None:
@@ -337,7 +339,7 @@ def clear_all(self) -> None:
             widget.deleteLater()
         self._entry_widgets.clear()
         self._clear_armed = False
-        self._btn_clear.setText("Alles löschen")
+        self._btn_clear.setText(t("history.button.clear_all"))
         self._btn_clear.setStyleSheet("")
         self._update_header()
         self._update_merge_button()
@@ -352,17 +354,17 @@ def _merge_dictation(self) -> None:
         if path:
             self.merged.emit(path)
 
-        self._btn_merge.setText("✓ Gespeichert" if path else "✓ Kopiert")
+        self._btn_merge.setText(t("history.status.saved") if path else t("history.status.copied"))
         self._btn_merge.setStyleSheet("color: #4caf50; font-weight: bold;")
         QTimer.singleShot(2500, self._reset_merge_button)
 
     def _reset_merge_button(self) -> None:
-        self._btn_merge.setText("Zusammenführen")
+        self._btn_merge.setText(t("history.button.merge"))
         self._btn_merge.setStyleSheet("")
 
     def _update_header(self) -> None:
         count = len(self._entries)
-        self._header_label.setText(f"Verlauf ({count})")
+        self._header_label.setText(t("history.header").format(count=count))
         self.count_changed.emit(count)
 
     def _update_merge_button(self) -> None: