feat: refactor email tagging system to use labels instead of colors

- Updated EmailContextMenu to replace color tag functionality with label tags.
- Modified EmailListItem to display label badges for emails based on keywords.
- Enhanced EmailViewer to include a tag picker for emails.
- Adjusted ThreadListItem to show label badges for email subjects.
- Added tests for email list item and keyword settings to ensure proper functionality of the new tagging system.
- Updated localization files to reflect changes from color tags to labels in multiple languages.

locales/de/common.json

@@ -155,9 +155,10 @@
     "back_to_list": "Zurück zur Liste",
     "message_details": "Nachrichtendetails",
     "more_reply_options": "Weitere Antwortoptionen",
-    "set_color": "Farbe festlegen",
+    "set_color": "Label setzen",
+    "tag": "Label",
     "more_actions": "Weitere Aktionen",
-    "remove_color": "Farbe entfernen",
+    "remove_color": "Label entfernen",
     "more_count": "+{count} weitere",
     "characters_count": "{count} Zeichen",
     "quick_reply_placeholder": "Eine kurze Antwort schreiben...",
@@ -929,8 +930,8 @@
     "delete": "Löschen",
     "mark_as_spam": "Spam melden",
     "not_spam": "Kein Spam",
-    "color_tag": "Farb-Tag",
-    "remove_color": "Farbe entfernen",
+    "color_tag": "Label",
+    "remove_color": "Label entfernen",
     "items_selected": "{count} E-Mails ausgewählt"
   },
   "shortcuts": {

locales/en/common.json

@@ -156,9 +156,10 @@
     "back_to_list": "Back to list",
     "message_details": "Message Details",
     "more_reply_options": "More reply options",
-    "set_color": "Set color",
+    "set_color": "Set tag",
+    "tag": "Tag",
     "more_actions": "More actions",
-    "remove_color": "Remove color",
+    "remove_color": "Remove tag",
     "more_count": "+{count} more",
     "characters_count": "{count} characters",
     "quick_reply_placeholder": "Write a quick reply...",
@@ -974,8 +975,8 @@
     "delete": "Delete",
     "mark_as_spam": "Report spam",
     "not_spam": "Not spam",
-    "color_tag": "Color Tag",
-    "remove_color": "Remove Color",
+    "color_tag": "Label",
+    "remove_color": "Remove Label",
     "items_selected": "{count} emails selected"
   },
   "shortcuts": {

locales/es/common.json

@@ -155,9 +155,10 @@
     "back_to_list": "Volver a la lista",
     "message_details": "Detalles del Mensaje",
     "more_reply_options": "Más opciones de respuesta",
-    "set_color": "Establecer color",
+    "set_color": "Establecer etiqueta",
+    "tag": "Etiqueta",
     "more_actions": "Más acciones",
-    "remove_color": "Eliminar color",
+    "remove_color": "Eliminar etiqueta",
     "more_count": "+{count} más",
     "characters_count": "{count} caracteres",
     "quick_reply_placeholder": "Escriba una respuesta rápida...",
@@ -929,8 +930,8 @@
     "delete": "Eliminar",
     "mark_as_spam": "Reportar spam",
     "not_spam": "No es spam",
-    "color_tag": "Etiqueta de Color",
-    "remove_color": "Eliminar Color",
+    "color_tag": "Etiqueta",
+    "remove_color": "Eliminar etiqueta",
     "items_selected": "{count} correos seleccionados"
   },
   "shortcuts": {

locales/fr/common.json

@@ -155,9 +155,10 @@
     "back_to_list": "Retour à la liste",
     "message_details": "Détails du message",
     "more_reply_options": "Plus d'options de réponse",
-    "set_color": "Définir la couleur",
+    "set_color": "Définir l'étiquette",
+    "tag": "Étiquette",
     "more_actions": "Plus d'actions",
-    "remove_color": "Retirer la couleur",
+    "remove_color": "Retirer l'étiquette",
     "more_count": "+{count} de plus",
     "characters_count": "{count} caractères",
     "quick_reply_placeholder": "Écrivez une réponse rapide...",
@@ -929,8 +930,8 @@
     "delete": "Supprimer",
     "mark_as_spam": "Signaler comme spam",
     "not_spam": "Pas un spam",
-    "color_tag": "Étiquette de couleur",
-    "remove_color": "Supprimer la couleur",
+    "color_tag": "Étiquette",
+    "remove_color": "Supprimer l'étiquette",
     "items_selected": "{count} emails sélectionnés"
   },
   "shortcuts": {

locales/it/common.json

@@ -155,9 +155,10 @@
     "back_to_list": "Torna all'elenco",
     "message_details": "Dettagli del messaggio",
     "more_reply_options": "Più opzioni di risposta",
-    "set_color": "Imposta colore",
+    "set_color": "Imposta etichetta",
+    "tag": "Etichetta",
     "more_actions": "Altre azioni",
-    "remove_color": "Rimuovi colore",
+    "remove_color": "Rimuovi etichetta",
     "more_count": "+{count} altri",
     "characters_count": "{count} caratteri",
     "quick_reply_placeholder": "Scrivi una risposta veloce...",
@@ -929,8 +930,8 @@
     "delete": "Elimina",
     "mark_as_spam": "Segnala come spam",
     "not_spam": "Non spam",
-    "color_tag": "Etichetta colore",
-    "remove_color": "Rimuovi colore",
+    "color_tag": "Etichetta",
+    "remove_color": "Rimuovi etichetta",
     "items_selected": "{count} messaggi selezionati"
   },
   "shortcuts": {

locales/ja/common.json

@@ -155,9 +155,10 @@
     "back_to_list": "リストに戻る",
     "message_details": "メッセージの詳細",
     "more_reply_options": "その他の返信オプション",
-    "set_color": "色を設定",
+    "set_color": "ラベルを設定",
+    "tag": "ラベル",
     "more_actions": "その他の操作",
-    "remove_color": "色を削除",
+    "remove_color": "ラベルを削除",
     "more_count": "他{count}件",
     "characters_count": "{count}文字",
     "quick_reply_placeholder": "クイック返信を入力...",
@@ -929,8 +930,8 @@
     "delete": "削除",
     "mark_as_spam": "迷惑メールを報告",
     "not_spam": "迷惑メールでない",
-    "color_tag": "カラータグ",
-    "remove_color": "色を削除",
+    "color_tag": "ラベル",
+    "remove_color": "ラベルを削除",
     "items_selected": "{count}件のメールを選択"
   },
   "shortcuts": {

locales/nl/common.json

@@ -155,9 +155,10 @@
     "back_to_list": "Terug naar lijst",
     "message_details": "Berichtdetails",
     "more_reply_options": "Meer antwoordopties",
-    "set_color": "Kleur instellen",
+    "set_color": "Label instellen",
+    "tag": "Label",
     "more_actions": "Meer acties",
-    "remove_color": "Kleur verwijderen",
+    "remove_color": "Label verwijderen",
     "more_count": "+{count} meer",
     "characters_count": "{count} tekens",
     "quick_reply_placeholder": "Schrijf een snel antwoord...",
@@ -929,8 +930,8 @@
     "delete": "Verwijderen",
     "mark_as_spam": "Spam melden",
     "not_spam": "Geen spam",
-    "color_tag": "Kleurtag",
-    "remove_color": "Kleur verwijderen",
+    "color_tag": "Label",
+    "remove_color": "Label verwijderen",
     "items_selected": "{count} e-mails geselecteerd"
   },
   "shortcuts": {

locales/pt/common.json

@@ -155,9 +155,10 @@
     "back_to_list": "Voltar para a lista",
     "message_details": "Detalhes da Mensagem",
     "more_reply_options": "Mais opções de resposta",
-    "set_color": "Definir cor",
+    "set_color": "Definir etiqueta",
+    "tag": "Etiqueta",
     "more_actions": "Mais ações",
-    "remove_color": "Remover cor",
+    "remove_color": "Remover etiqueta",
     "more_count": "+{count} mais",
     "characters_count": "{count} caracteres",
     "quick_reply_placeholder": "Escreva uma resposta rápida...",
@@ -929,8 +930,8 @@
     "delete": "Excluir",
     "mark_as_spam": "Reportar spam",
     "not_spam": "Não é spam",
-    "color_tag": "Etiqueta de Cor",
-    "remove_color": "Remover Cor",
+    "color_tag": "Etiqueta",
+    "remove_color": "Remover etiqueta",
     "items_selected": "{count} e-mails selecionados"
   },
   "shortcuts": {