Release v1.0.4-beta.2

[zerob13]

Summary

• Prepare DeepChat v1.0.4-beta.2 from dev for release to main.
• Bump package version and add bilingual changelog notes dated 2026-04-27.
• Align release-readiness tests with current startup store initialization, ProviderModelList virtual scroller usage, and YoBrowser dom-ready navigation behavior.

Release Notes

• Preserved interleaved reasoning output so mixed reasoning and answer streams stay in the correct order.
• Updated the Markstream renderer to the stable 0.0.13 release for more reliable Markdown streaming.
• Improved chat message transitions, sidebar updates, and side panel rendering performance.
• Fixed RTK and built-in knowledge configuration status handling across MCP tool setup flows.

UI/UX Layout Note

BEFORE

+----------------------+---------------------------+
| Sidebar/session list | Chat stream               |
| item-level updates   | message block transitions |
+----------------------+---------------------------+

AFTER

+----------------------+---------------------------+
| Sidebar/session list | Chat stream               |
| smoother updates     | stable block transitions  |
+----------------------+---------------------------+

Agent Process

Prompted Codex to follow the repository release flow: inspect dev/main/tag state, choose the next beta version after v1.0.4-beta.1, derive release notes from commits since the previous tag, run release checks, cut the release branch, and open this PR for review.

Verification

• pnpm run format
• pnpm run i18n
• pnpm run lint
• pnpm run typecheck
• pnpm exec vitest run (2362 passed, 20 skipped)

Release Flow

After approval, publish with:

pnpm run release:ff -- release/v1.0.4-beta.2 --tag v1.0.4-beta.2

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch release/v1.0.4-beta.2

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