v0.306.0: R-570 — the off-site note decides on its kind only; the pre-0.251.0 text fallback is deleted

Fleet condition read on each box's settings.json 2026-10-10 (offbox.last_success ~02:16Z on 0.304.0).
Red-proof: the new no-kind row of TestR553_StaleNoteDecisionSurvivesWordingChange failed against the fallback.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0159rPz1ZhFKsS53msqPYxtS

controller/internal/backup/r240_zero_selection_test.go

@@ -10,7 +10,7 @@ import (
 // SUCCESSFUL right beside NOTHING SELECTED, the same shape as R-203/R-234 (a warning beside a success
 // is read as a success). The consequence asserted through the real run: the verdict stays `ok` (an
 // empty selection is not a failure), the note says plainly that the run saved nothing, it does NOT
-// say „Sikeres", and it still carries the lowercase marker the R-570 legacy fallback reads.
+// say „Sikeres", and it records its KIND (the page decides on the kind; R-570 removed the text fallback).
 func TestR240_ZeroSelectionRunDoesNotSaySuccess(t *testing.T) {
 	m, sett := newOffboxManager(t)
 	m.SetOffboxRunner(func(_ context.Context, _ []string, args ...string) ([]byte, error) {
@@ -32,9 +32,6 @@ func TestR240_ZeroSelectionRunDoesNotSaySuccess(t *testing.T) {
 	if !strings.Contains(st.LastWarning, "semmit nem mentett") {
 		t.Errorf("R-240: the note does not say the run saved nothing: %q", st.LastWarning)
 	}
-	if !strings.Contains(st.LastWarning, "nincs mentésre jelölt alkalmazás") {
-		t.Errorf("the R-570 marker is gone from the note: %q", st.LastWarning)
-	}
 	if st.LastWarningKind != OffboxWarnNoAppsSelected {
 		t.Errorf("the kind is not recorded: %q", st.LastWarningKind)
 	}