[codex] Add LangGraph queue surface

[blove]

Summary

Adds the first public LangGraph queue parity surface for server-side enqueue runs. The Angular agent() now exposes queue() with pending entries plus cancel and clear helpers, backed by transport methods for runs.create(... multitaskStrategy: 'enqueue') and runs.cancel().

The stream bridge now tracks queued runs while an active stream is loading, joins queued runs FIFO after the active stream completes, and cancels pending server runs when users cancel, clear, stop, or switch threads so local queue state does not orphan server-side work.

Docs and generated agent API docs were updated to remove the old queue limitation and list the new queue mapping.

Validation

• npx vitest run --config vite.config.mts src/lib/internals/stream-manager.bridge.spec.ts -t "cancels queued runs" --reporter=verbose
• npx nx test langgraph
• npx nx lint langgraph (passes with existing warnings)
• npx nx build langgraph
• npm run generate-api-docs
• npx nx lint website
• npx nx build website
• git diff --check

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Project	Deployment	Actions	Updated (UTC)
cacheplane	Ready	Preview, Comment	May 2, 2026 1:54am