feat(portal): add agents sidebar sub-tree and per-agent route

[sytone]

Part of #407 (Phase 1 of 3)

Changes

• Agents nav item in sidebar becomes expand/collapse sub-tree
• Sub-tree lists all registered agents with links to /agents/{agentId}
• Auto-expands when navigating to any /agents/* route
• Live refresh on Hub.OnAgentsChanged
• /agents/{agentId} route renders detail placeholder (Phase 2 will add full panel)
• /agents/new route auto-opens the add-agent form

Test coverage (5 new tests)

• AgentId param set renders detail placeholder
• AgentId null renders table view
• AgentId=new shows add form
• Agents sidebar subnav not shown when not on agents page
• AgentsSidebar_ExpandsWhenOnAgentsRoute

[sytone]

Farnsworth Review — PR #491

• CI: ✅ All checks passing (build-and-test, CodeQL, TruffleHog, patterns, deps)
• Merge conflicts: ✅ CLEAN / MERGEABLE
• Commit title: feat(portal): add agents sidebar sub-tree and per-agent route ✅ conventional
• Test coverage: 5 new tests — detail placeholder when agentId set, table view when null, add-form on agentId=new, sidebar not shown off-agents-route, auto-expand on agents route ✅
• Spec completeness vs [Portal] Rich per-agent configuration panel with extension config blocks #407 Phase 1: Expand/collapse sidebar sub-tree, per-agent links, auto-expand on /agents/*, live OnAgentsChanged refresh, /agents/{agentId} placeholder route, /agents/new opens add form ✅
• Design note: Placeholder for Phase 2 (full config panel) is the right incremental approach. OnAgentsChanged live refresh ensures sidebar stays consistent without polling.
• Sub-issue of [Portal] Rich per-agent configuration panel with extension config blocks #407 (Phase 1 of 3)

LGTM. Ready to merge.

[sytone]

CI: All checks passing
Merge conflicts: Clean / MERGEABLE
Commit title: Conventional commit format correct
Coverage: 5 new tests - AgentsPageTests (sidebar, expand/collapse, per-agent links, auto-expand on /agents/* route)
Spec completeness: Part of #407 Phase 1 - agents sidebar sub-tree with expand/collapse, per-agent links, auto-expand on matching routes, live refresh on Hub.OnAgentsChanged

LGTM - ready to merge.

[sytone]

CI: ✅ All checks passing
Merge: CLEAN — no conflicts
Commit title: feat(portal): add agents sidebar sub-tree and per-agent route ✅ Conventional commit
Coverage: 5 bunit tests covering expand/collapse, route auto-expand, live refresh
Spec completeness: Closes #407 Phase 1 — agents sidebar with per-agent links, auto-expand on /agents/* routes

LGTM — ready to merge.

[sytone]

Farnsworth Review — PR #491

CI: ✅ All checks passing
Merge conflicts: ✅ Clean (MERGEABLE)
Conventional commit title: ✅ feat(portal): add agents sidebar sub-tree and per-agent route

Test coverage:

• ✅ 5 new tests (expand/collapse, per-agent links, auto-expand on route)
• MainLayoutTests updated
• Full suite passes clean

Spec completeness vs #407 Phase 1: Sidebar sub-tree with live refresh and /agents/{agentId} route satisfies Phase 1. Auto-expand on /agents/* routes is good UX.

LGTM. Ready to merge.

[sytone]

Closing as part of a planned hard-reset of the in-flight branch set so the new domain-model refactor can land on a clean trunk.

Audit verdict: keep

Rationale: Portal/UI. No domain impact.

The new plan (in session state) reshapes core types: Citizen (User+Agent union), Vogen-generated value objects, ThreadId removed in favour of composite ChannelAddress, mark-not-delete compaction, centralised SessionContextProjector, single-path routing. Many in-flight branches touch contracts that are about to change — rebasing later would be more work than rebuilding on the new shape.

If this work is still wanted, refile as a new issue/PR against the post-refactor contracts.