Stand up Phase 3 safety net before the models/ rewrite. The harness loads
JSON fixtures via Vite's import.meta.glob, parses each through
InboundSettingsSchema (the tagged-wrapper DU), and snapshots the canonical
parsed shape. Snapshots stay byte-stable across the upcoming class-to-
pure-function extraction, catching any normalization drift.
Six representative inbound fixtures cover the high-traffic protocols:
vless, vmess, trojan, shadowsocks (2022-blake3 multi-user), wireguard,
hysteria2. Stream and security branches plus the remaining protocols
(http, mixed, tunnel, hysteria) follow in subsequent turns.
Uses /// <reference types="vite/client" /> instead of @types/node so we
avoid pulling in another type package; import.meta.glob is enough to walk
the fixtures directory at compile time.
Adds vitest 4.1.7 as the only new dev dependency. test/test:watch scripts
land in package.json; a standalone vitest.config.ts keeps the production
vite.config.js (which reads from sqlite via DatabaseSync) out of the test
runner.
