TypeScript 5.9 erasableSyntaxOnly rejects enum declarations in .ts
files (they emit runtime code). Switch protoc-gen-es from target=ts
to target=js+dts which generates .js runtime + .d.ts type declarations.
Also fix type mismatches in useApi.ts (OrderSide/OrderType enum types,
StartBacktestRequest field mapping) and MLDashboard signal defaulting.
Add web-dashboard network policy for MinIO egress + proxy ingress.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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