🚀 LobeHub Release (20260427)

Hotfix Scope: Agent topic-switching regression — stale chat state on agent change

Clears residual topic state when navigating between agents and restores blank-canvas behavior on agent switch.

🐛 What's Fixed

• Stale topic on agent switch — Switching from /agent/agt_A/tpc_X to /agent/agt_B no longer leaves the previous topic's messages on screen, and Start new topic responds again. (#14231)
• Header & sidebar consistency — Conversation header now shows the active subtopic's title, and the sidebar keeps the parent topic's thread list expanded while a thread is open.

⚙️ Upgrade

• Self-hosted: pull the new image and restart. No schema or env changes.
• Cloud: applied automatically.

👥 Owner

@{pr-author}

Note for Claude: Replace {pr-author} with the actual PR author. Retrieve via gh pr view <number> --json author --jq '.author.login'. Do not hardcode a username.