chore: improve error message

frontend/src/i18n/lang/en.json

@@ -1155,8 +1155,8 @@
     "3006": "The project share does not exist.",
     "3007": "A project with this identifier already exists.",
     "3008": "The project is archived and can therefore only be accessed read only. This is also true for all tasks associated with this project.",
-    "4001": "The project task text cannot be empty.",
-    "4002": "The project task does not exist.",
+    "4001": "The task title cannot be empty.",
+    "4002": "The task does not exist.",
     "4003": "All bulk editing tasks must belong to the same project.",
     "4004": "Need at least one task when bulk editing tasks.",
     "4005": "You do not have the right to see the task.",

pkg/models/error.go

@@ -476,7 +476,7 @@ func IsErrTaskDoesNotExist(err error) bool {
 }
 
 func (err ErrTaskDoesNotExist) Error() string {
-	return fmt.Sprintf("Project task does not exist. [ID: %d]", err.ID)
+	return fmt.Sprintf("The task does not exist. [ID: %d]", err.ID)
 }
 
 // ErrCodeTaskDoesNotExist holds the unique world-error code of this error