fix(journey-item-row): add journey_remove_item_aria key and fix remove button label

The remove button was using the confirmation-question text as its
aria-label. Added a new dedicated journey_remove_item_aria key
in all three locales so the button has a clear accessible name
before the confirmation dialog opens.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

frontend/messages/de.json

@@ -1188,6 +1188,7 @@
 	"journey_move_down": "'{title}' nach unten verschieben",
 	"journey_note_error": "Notiz konnte nicht gespeichert werden",
 	"journey_item_moved": "Eintrag {position} von {total} — nach Position {newPosition} verschoben",
+	"journey_remove_item_aria": "Eintrag entfernen",
 	"journey_remove_confirm": "Wirklich entfernen?",
 	"journey_remove_confirm_yes": "Bestätigen",
 	"journey_remove_confirm_cancel": "Abbrechen",

frontend/messages/en.json

@@ -1188,6 +1188,7 @@
 	"journey_move_down": "Move '{title}' down",
 	"journey_note_error": "Could not save note",
 	"journey_item_moved": "Entry {position} of {total} — moved to position {newPosition}",
+	"journey_remove_item_aria": "Remove item",
 	"journey_remove_confirm": "Really remove?",
 	"journey_remove_confirm_yes": "Confirm",
 	"journey_remove_confirm_cancel": "Cancel",

frontend/messages/es.json

@@ -1188,6 +1188,7 @@
 	"journey_move_down": "Bajar '{title}'",
 	"journey_note_error": "No se pudo guardar la nota",
 	"journey_item_moved": "Entrada {position} de {total} — movida a la posición {newPosition}",
+	"journey_remove_item_aria": "Eliminar entrada",
 	"journey_remove_confirm": "¿Realmente eliminar?",
 	"journey_remove_confirm_yes": "Confirmar",
 	"journey_remove_confirm_cancel": "Cancelar",