implement UI namespace filtering

[maazghani]

Summary

part 2 of addressing #1812

This connects the agents list UI to the namespace filtering support added in the previous API/client PR.

/agents stays the all-namespaces view. /agents?namespace=<namespace> now fetches and renders agents scoped to that namespace. The namespace picker drives both the URL and the agents request, so there is no “trust me, the request was scoped” UI state.

The scoped empty state also carries the namespace into New Agent, but only as the starting value. The create form still lets the user change the namespace before saving.

Notes

AgentList owns list fetching now because the selected namespace comes from the route. AgentsProvider still handles shared create/edit dependencies without fetching every agent on mount.

Delete refresh gets passed down from the current list view so deletes refresh the same scoped query.

Tests

Added coverage for:

• /agents fetching all agents
• /agents?namespace=kagent fetching scoped agents
• namespace selector URL updates
• clearing back to all namespaces
• scoped empty state linking to New Agent
• create form initializing from ?namespace=...
• getAgents() normalizing a missing data field to []

[Copilot]

Pull request overview

Note

Copilot was unable to run its full agentic suite in this review.

This PR adds namespace-aware behavior to the Agents UI by introducing query-param-driven namespace filtering, improving how “all namespaces” is represented in the selector, and adjusting agent list fetching/refreshing flows.

Changes:

• Add namespace filtering on /agents via ?namespace= plus namespace-aware empty state and create link.
• Enhance NamespaceCombobox to optionally include an “All namespaces” entry and disable auto-default selection when desired.
• Add/adjust tests for namespace behavior and normalize getAgents to treat missing data as an empty list.

Reviewed changes

Copilot reviewed 13 out of 13 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
ui/src/lib/tests/agentsActions.test.ts	Adds coverage for getAgents normalization when data is missing.
ui/src/lib/tests/CreateAgentPage.namespace.test.tsx	Verifies create page initializes namespace from ?namespace=.
ui/src/lib/tests/AgentsProvider.namespace.test.tsx	Verifies AgentsProvider no longer fetches all agents on mount.
ui/src/lib/tests/AgentList.namespace.test.tsx	Tests namespace filtering, URL updates, and scoped empty-state create link.
ui/src/components/NamespaceCombobox.tsx	Adds “All namespaces” option, optional default auto-select, and ARIA label support.
ui/src/components/DeleteAgentButton.tsx	Replaces provider refresh with an onDeleted callback for post-delete refresh.
ui/src/components/AgentsProvider.tsx	Stops initial agent list fetching and removes post-create/update refresh behavior.
ui/src/components/AgentListView.tsx	Threads onAgentsChanged down to rows to refresh after deletes.
ui/src/components/AgentList.tsx	Implements namespace query parsing, filtered fetching, and namespace selector/UX.
ui/src/components/AgentGrid.tsx	Threads onAgentsChanged through to cards for refresh after deletes.
ui/src/components/AgentCard.tsx	Calls onAgentsChanged after delete via DeleteButton.
ui/src/app/agents/new/page.tsx	Initializes create namespace from query and returns to namespace-scoped list after create.
ui/src/app/actions/agents.ts	Normalizes getAgents to sort an empty array when data isn’t an array.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[maazghani]

PR comments addressed, @peterj ready to review/merge.

[maazghani]

Looks like chainguard has recovered