feat: emoji picker in create dialogs; due date and priority right under a deepened task; no flicker on kanban drop

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

internal/domain/due.go

@@ -75,3 +75,16 @@ func HumanDue(raw string) string {
 	}
 	return t.Format("02.01.2006")
 }
+
+// PriorityLabel: how a task's priority reads in mails and notes.
+func PriorityLabel(p string) string {
+	switch p {
+	case "urgent":
+		return "Dringend"
+	case "high":
+		return "Wichtig"
+	case "low":
+		return "Niedrig"
+	}
+	return "Normal"
+}