Continues the page-by-page translation pass started in cb37dd55 — runs
every user-visible string on settings (General/Security/Telegram/Sub),
inbounds (Client/QR/Info modals), and xray (Routing/Balancer/Rule/Warp/
Nord/Basics/Outbounds tabs) through useI18n. Updates the TOML→JSON sync
script to escape `@` (vue-i18n parses it as a linked-format prefix) and
refreshes all 13 locale files.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
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