Symptom: spawn animation missing on org import. Workspaces appeared in
their final positions all at once instead of materialising one-by-one.
Root cause: the WS pill said "Reconnecting" forever because the canvas
was trying to connect to ws://localhost:3000/ws — its own port, where
Next.js dev doesn't serve a WebSocket — instead of the platform's
ws://localhost:8080/ws.
Why: deriveWsBaseUrl() falls back to window.location when
NEXT_PUBLIC_WS_URL is unset. Next.js auto-loads .env from the project
root only — and the canonical NEXT_PUBLIC_WS_URL /
NEXT_PUBLIC_PLATFORM_URL live in the monorepo root .env, alongside the
Go platform's MOLECULE_ENV / DATABASE_URL. Without an extra
canvas/.env.local copy (which would still be a per-developer manual
step), the canvas dev server starts blind to those vars.
Fix: next.config.ts now walks upward from __dirname looking for the
monorepo root (same workspace-server/go.mod sentinel the platform's
dotenv loader uses) and merges the root .env into process.env BEFORE
Next.js compiles. Existing env wins over file values, so docker
runs / CI / explicit exports still dominate.
The parser is a TypeScript mirror of workspace-server/cmd/server/
dotenv.go's parseDotEnvLine — same rules (export prefix, quotes,
inline comments, BOM) so a single .env line behaves identically across
both processes. If one parser changes, the other has to.
Production unaffected: `output: "standalone"` bakes resolved env into
the build, the workspace-server sentinel isn't shipped in deploy
artifacts, and the existing-env-wins rule means container env
dominates anywhere this file is consulted at runtime.
Verified: canvas dev startup log now shows
"[next.config] loaded 49 vars from /Users/.../molecule-core/.env";
served bundle has the correct ws://localhost:8080/ws URL; WS pill
flips to "Connected" after a hard refresh and per-workspace spawn
animations fire on the next org import as expected.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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