[kcrmin]

What and why

marketData.ts opens the price stream at /ws/v1/market-data/prices on the API origin, which is the page origin when VITE_API_BASE_URL is empty (the default in Docker development). The Vite dev server only proxied /api/v1/backtests, /api and /actuator, so the WebSocket upgrade was never forwarded and the live price stream never connected locally.

This adds a /ws proxy rule with ws: true to the same VITE_REAL_API_TARGET (backend-api, which registers /ws/v1/market-data/prices). A small node-environment test pins the rule.

The unused VITE_WS_BASE_URL in root compose.front.yml is removed in the companion root PR (same branch name).

Verified

• Stub upstream (plain Node HTTP server that completes the WebSocket handshake and sends one frame), Vite started with VITE_REAL_API_TARGET pointing at it:
  • develop: HTTP ticket proxied, WebSocket TIMEOUT, upstream never saw an upgrade
  • this branch: WebSocket OPEN and received {"stub":"price"}, upstream saw UPGRADE /ws/v1/market-data/prices?ticket=t-1
• New src/viteDevProxy.test.ts fails on develop and passes here
• node --test scripts/test-github-action-pins.mjs scripts/test-real-api-integration-workflow.mjs: passed
• pnpm typecheck: clean
• pnpm exec vitest run (Node 24): 690 passed (one earlier run hit the known create-dialog focus flake fixed by fix(competition): keep dialog focus on re-render #185; two reruns were green)
• pnpm build && node scripts/assert-production-bundle.mjs: passed
• CI=1 pnpm e2e: 26 passed

Checklist

• Proxy only active when VITE_REAL_API_TARGET is set, as before
• Production bundle unchanged
• Companion root PR removes the unread env var

Related: Idea2Strategy/Idea2Strategy#531