feat(agent): add communication style setting to profile

- Add AgentStyle type with 6 preset options (professional, friendly, etc.)
- Add getStyle/setStyle methods to ProfileManager
- Update soul.md template to include style section
- Add reloadSystemPrompt support for style changes

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

src/agent/async-agent.ts

@@ -177,6 +177,20 @@ export class AsyncAgent {
     this.agent.setUserContent(content);
   }
 
+  /**
+   * Get agent communication style from profile config.
+   */
+  getAgentStyle(): string | undefined {
+    return this.agent.getAgentStyle();
+  }
+
+  /**
+   * Update agent communication style in profile config.
+   */
+  setAgentStyle(style: string): void {
+    this.agent.setAgentStyle(style);
+  }
+
   /**
    * Reload profile from disk and rebuild system prompt.
    * Call this after updating profile files to apply changes immediately.