UI: Show error_category on failed executions #325
Description
Execution failures now include an error_category field that classifies the root cause. The UI should display this prominently on failed executions.
Categories to handle:
| Category | Meaning | Suggested UX |
|---|---|---|
llm_unavailable |
LLM backend circuit breaker is open | Red badge, link to LLM health |
concurrency_limit |
Agent at max concurrent executions | Yellow badge, link to queue status |
agent_timeout |
Agent didn't respond in time | Orange badge |
agent_unreachable |
Agent is down | Red badge, link to node status |
agent_error |
Agent returned an error | Red badge with error details |
bad_response |
Agent returned invalid response | Red badge |
internal_error |
Control plane error | Red badge |
What to add:
- Error category badge/tag on execution list and detail views
- Human-readable description of what went wrong
- Where applicable, link to the relevant diagnostic page (LLM health, queue, node status)
The user in #316 had no way to tell if the problem was the LLM, the agent, or the control plane.