[harshil-2096]

Summary

Closes AGE-2643

Changes

How was this tested?

Checklist

• I have read the contributing guidelines
• pnpm build, pnpm test, pnpm typecheck, pnpm lint:ci, and pnpm format:check pass locally
• Tests added/updated where it makes sense
• No hand-edits to generated code (packages/trueforge-sdk, python/trueforge_sdk, .github/fern/openapi/openapi.json, docs/openapi.json) — fork PRs omit SDK regen; maintainers regenerate after merge
• Docs / .env.example updated if configuration or behavior changed

---

Note

Low Risk
UI-only loader timing and label logic in trueforge-ui; behavior is covered by updated unit tests.

Overview
Fixes premature "Taking longer than expected" on the assistant message loader during long but active streams.

The slow threshold moves from 10s to 60s, and the timer now tracks stream progress via a new loaderActivityProgress fingerprint (reasoning text length, tool argsText length). useSlowActivityLabel resets its clock when that fingerprint changes, so incremental reasoning or tool-argument updates keep the normal working label until one minute without new content. AssistantMessageContainer passes progressKey alongside the existing activity key.

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[changeset-bot]

🦋 Changeset detected

Latest commit: 0e619f4

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@truefoundry/trueforge-ui	Patch

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