v0.259.0 — the claim page and the backup warnings answer in the reader's language (R-596, R-598)

The 2026-09-20 English drill ended one screen short: the claim page was English
and its answers were Hungarian, so a household who mistyped the code from their
e-mail could not tell a typo from a dead code. Fourteen call sites carrying nine
messages now go through s.msg; the backup page's two protection warnings — which
are promises about whether the customer's files are safe — follow the same route.

Hungarian is byte-identical, proved structurally by the go-parity gate against the
frozen base capture and red-proofed on a single added full stop.

data["Title"] was DEAD (claim.html is standalone; .Title is layout.html's) and is
deleted rather than translated — a translated dead field is a permanent false
signal about where the page's title comes from.

Six existing copy-contract tests were kept, not weakened: each now resolves its key
through the real bundle, so it still convicts on a reworded Hungarian sentence.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0159rPz1ZhFKsS53msqPYxtS

controller/internal/web/backup_target_offer_test.go

@@ -35,7 +35,7 @@ func TestDegradedStateKeepsReportingOnEveryVisit(t *testing.T) {
 // The copy must carry FACT → CONSEQUENCE → REMEDY. A customer told only "your backup is on the same
 // disk" cannot act; the sentence has to say what that costs them and what fixes it.
 func TestDegradedCopyNamesConsequenceAndRemedy(t *testing.T) {
-	msg := degradedMessageFor(BackupTargetState{Known: true, Degraded: true})
+	msg := huText(t, degradedMessageFor(BackupTargetState{Known: true, Degraded: true}))
 	for _, want := range []struct{ frag, why string }{
 		{"ugyanazon a lemezen", "the FACT — it shares the disk with the system"},
 		{"lemezhiba ellen nem", "the CONSEQUENCE — it does not survive a disk failure"},