feat(agent): add profile name and user content management

Add methods to ProfileManager, Agent, and AsyncAgent for:
- Getting/setting agent display name (stored in config.json)
- Getting/setting user.md content

This enables the desktop app to manage agent settings.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/agent/async-agent.ts

@@ -148,4 +148,32 @@ export class AsyncAgent {
   getProfileId(): string | undefined {
     return this.agent.getProfileId();
   }
+
+  /**
+   * Get agent display name from profile config.
+   */
+  getAgentName(): string | undefined {
+    return this.agent.getAgentName();
+  }
+
+  /**
+   * Update agent display name in profile config.
+   */
+  setAgentName(name: string): void {
+    this.agent.setAgentName(name);
+  }
+
+  /**
+   * Get user.md content from profile.
+   */
+  getUserContent(): string | undefined {
+    return this.agent.getUserContent();
+  }
+
+  /**
+   * Update user.md content in profile.
+   */
+  setUserContent(content: string): void {
+    this.agent.setUserContent(content);
+  }
 }