feat(agent): add agent management UI, skills/tools/triggers, and issue assignment

- Complete agents management page with create dialog, runtime device selector,
  skills/tools/triggers/tasks tabs, and agent detail view
- Add AssigneePicker to issue detail page for assigning to members or agents
- Extend agent types with description, skills, tools, triggers, RuntimeDevice
- Add SDK methods for agent CRUD and task listing
- Add migration 002 for agent config columns (skills, tools, triggers)
- Update seed data with realistic agent configurations
- Use auth context as single source of truth for agents (fixes state sync)

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

packages/sdk/src/api-client.ts

@@ -7,6 +7,9 @@ import type {
   CreateMemberRequest,
   UpdateMemberRequest,
   Agent,
+  CreateAgentRequest,
+  UpdateAgentRequest,
+  AgentTask,
   InboxItem,
   Comment,
   Workspace,
@@ -151,6 +154,28 @@ export class ApiClient {
     return this.fetch(`/api/agents/${id}`);
   }
 
+  async createAgent(data: CreateAgentRequest): Promise<Agent> {
+    return this.fetch("/api/agents", {
+      method: "POST",
+      body: JSON.stringify(data),
+    });
+  }
+
+  async updateAgent(id: string, data: UpdateAgentRequest): Promise<Agent> {
+    return this.fetch(`/api/agents/${id}`, {
+      method: "PUT",
+      body: JSON.stringify(data),
+    });
+  }
+
+  async deleteAgent(id: string): Promise<void> {
+    await this.fetch(`/api/agents/${id}`, { method: "DELETE" });
+  }
+
+  async listAgentTasks(agentId: string): Promise<AgentTask[]> {
+    return this.fetch(`/api/agents/${agentId}/tasks`);
+  }
+
   // Inbox
   async listInbox(): Promise<InboxItem[]> {
     return this.fetch("/api/inbox");