R-126: refuse a .fab export without a password to a network drive (09 decision 128)

An export to a registered network drive (Kind=network) with no bundle
password now answers 400 with a household sentence (hu+en); with a
password it runs; a local drive is unchanged.

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

controller/scripts/i18n_go_keys.json

@@ -8,6 +8,7 @@
     "banner.missed_backup.suggest": "BORN AS A KEY, v0.295.0 (R-871, `09` decision 110) -- a NEW sentence of the missed-backup banner, never a Go literal; pinned in Hungarian by TestR871_BannerShownThenClosedUntilTheNextMiss and the parity fixture launcher_missed_backup.",
     "event.backup_catchup_done": "BORN AS A KEY, v0.295.0 (R-871, `09` decision 109) -- the catch-up's NEW timeline line, never a Go literal; sent by Notifier.NotifyBackupCatchUp (wiring pinned by TestR871_CatchUpWiring).",
     "badge.lifecycle.abandoned": "R-589 (v0.258.0) -- localeFuncs; the Hungarian form stays in templateFuncMap, pinned by TestLocaleFuncsHungarianBundleMatchesFuncMap",
+    "app_export.network_drive_needs_password": "BORN AS A KEY (R-126, `09` decision 128) -- a NEW sentence, never a Go literal: the export refusal for a network drive without a bundle password. Pinned in Hungarian by TestExportStart_NetworkDriveNeedsPassword.",
     "badge.lifecycle.abandoned.title": "R-589 (v0.258.0) -- localeFuncs; the Hungarian form stays in templateFuncMap, pinned by TestLocaleFuncsHungarianBundleMatchesFuncMap",
     "badge.update.ahead.title": "BORN AS A KEY, v0.260.0 (R-524) -- a NEW sentence, never a Go literal, so there is nothing in the base capture to measure it against. Pinned in both languages by TestUpdateBadgeFollowsTheLanguage.",
     "badge.update.behind": "R-589 (v0.258.0) -- localeFuncs; the Hungarian form stays in templateFuncMap, pinned by TestLocaleFuncsHungarianBundleMatchesFuncMap",