Improve agent detail, issue creation, and approvals pages

Expand AgentDetail with heartbeat history and manual trigger controls.
Enhance NewIssueDialog with richer field options. Add agent connection
string retrieval API. Improve issue routes with parent chain resolution.
Clean up Approvals page layout. Update query keys and validators.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

ui/src/api/agents.ts

@@ -1,6 +1,13 @@
 import type { Agent, AgentKeyCreated, AgentRuntimeState, HeartbeatRun } from "@paperclip/shared";
 import { api } from "./client";
 
+export interface AgentKey {
+  id: string;
+  name: string;
+  createdAt: Date;
+  revokedAt: Date | null;
+}
+
 export interface AdapterModel {
   id: string;
   label: string;
@@ -24,7 +31,9 @@ export const agentsApi = {
   pause: (id: string) => api.post<Agent>(`/agents/${id}/pause`, {}),
   resume: (id: string) => api.post<Agent>(`/agents/${id}/resume`, {}),
   terminate: (id: string) => api.post<Agent>(`/agents/${id}/terminate`, {}),
+  listKeys: (id: string) => api.get<AgentKey[]>(`/agents/${id}/keys`),
   createKey: (id: string, name: string) => api.post<AgentKeyCreated>(`/agents/${id}/keys`, { name }),
+  revokeKey: (agentId: string, keyId: string) => api.delete<{ ok: true }>(`/agents/${agentId}/keys/${keyId}`),
   runtimeState: (id: string) => api.get<AgentRuntimeState>(`/agents/${id}/runtime-state`),
   resetSession: (id: string) => api.post<void>(`/agents/${id}/runtime-state/reset-session`, {}),
   adapterModels: (type: string) => api.get<AdapterModel[]>(`/adapters/${type}/models`),