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/retrieval_promise_gate.py

@@ -27,6 +27,9 @@ import os
 import re
 import sys
 
+sys.path.insert(0, os.path.dirname(os.path.abspath(__file__)))
+import i18n_bundle  # noqa: E402
+
 _HERE = os.path.dirname(os.path.abspath(__file__))
 TEMPLATES = os.path.join(_HERE, "..", "internal", "web", "templates")
 
@@ -119,7 +122,11 @@ def scan():
         sources.append((os.path.basename(gp), gp, GO_COMMENT))
         files = files + [os.path.basename(gp)]
     for name, path, stripper in sources:
-        text = stripper.sub("", open(path, encoding="utf-8").read())
+        # v0.247.0: a template's copy lives in the i18n bundle; judge the page as it renders in
+        # Hungarian (the stems are Hungarian). English retrieval claims are not scanned yet -- R-row
+        # in 10-localisation.md; the English bundle covers three pages today.
+        raw = open(path, encoding="utf-8").read()
+        text = stripper.sub("", i18n_bundle.expand(raw, "hu") if path.endswith(".html") else raw)
         for stem in STEMS:
             for m in re.finditer(re.escape(stem) + r"[a-záéíóöőúüű]*", text):
                 line = text[: m.start()].count("\n") + 1