AI dashboard agent click updates URL but not gen_ai.agent.name filter

Clicking an agent in the AI Agents Overview dashboard updates the URL query param (agent=<name>) but does not update the gen_ai.agent.name filter widget or re-query the page data. The UI remains unchanged despite the URL reflecting the selected agent.

• Surface: AI Monitoring dashboard — AI Agents Overview
• Steps to reproduce:
  1. Open the AI Agents Overview dashboard
  2. Click an agent name in the Traces panel (e.g. plant_expert_agent)
  3. Observe URL updates with agent=plant_expert_agent
  4. UI / gen_ai.agent.name filter widget does not update; data shown is still unfiltered
• Expected behavior (inferred): Selecting an agent should apply the gen_ai.agent.name filter and refresh all widgets accordingly
• Replay evidence: https://sentry.sentry.io/explore/replays/ba2bd4c12d7c4a84827e32d2e5699c87/
• Dashboard reference: https://demo.sentry.io/dashboard/441046/?project=4510034993545216&statsPeriod=30d

Reported by Neil Manvar.

Action taken on behalf of Neil Manvar.

Start at the AI Agents Overview dashboard, especially the Traces panel click behavior and the agent URL query parameter handling. Reproduce the selection with plant_expert_agent, then trace why the gen_ai.agent.name filter widget and page data do not refresh. Done means the filter and all dashboard widgets reflect the selected agent.