v0.247.0: i18n spike — the dashboard can speak English, Hungarian byte-identical

Message bundles (internal/i18n) expanded into templates before parsing, one
template set per language. Launcher, /backups, /apps/<slug> and the layout
converted; household language setting, POST /settings/language, ?lang= override,
report field. Parity test against fixtures captured from unconverted templates;
copy gates read templates expanded; new i18n_missing_gate.

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

controller/scripts/controller_gates.py

@@ -86,6 +86,9 @@ GATES = [
     ("observations", SHARED_OBSERVATIONS, [REPO], True, True),
     # R-470/R-472 — the newest release header states its MinAgent; the hub's floor reads it. Fast.
     ("minagent-header", os.path.join(SCRIPTS, "minagent_header_gate.py"),      [],       True, True),
+    # v0.247.0 — the i18n bundles: keys exist, no orphans, the English gap and the formal-form debt
+    # only shrink (ratchets), no pleading English. Fast: stdlib file reads.
+    ("i18n",            os.path.join(SCRIPTS, "i18n_missing_gate.py"),         [],       True, True),
     # R-404 — ADVISORY. Reports the golden debt where it is created; never refuses.
     ("golden-notice", GOLDEN_NOTICE, [REPO], True, False),
 ]