feat(orchestrator): subagent status indicators in Discord and Telegram

[TerrysPOV]

Problem

When coordinating multiple agent sessions, there is no visibility into which subagents are active, idle, or blocked — especially when managing from a phone via Discord/Telegram.

Proposed solution

Expose a simple status view showing per-subagent state:

Agent: research-agent   → 🟡 working  (2m 14s)
Agent: writer-agent     → ⚪ idle
Agent: review-agent     → 🔴 blocked  (waiting: approval)

Surfaced via:

• A new /agents Telegram command
• A Discord slash command /agents
• Optionally: a web UI panel (extends the existing session browser)

Why ClaudeClaw-Plus

• Extends the existing orchestrator and agent lifecycle events already in Plus
• The agent registry and session management required for this is Plus-only infrastructure
• The subagent stop/notification hooks needed are already wired in Plus

Source

Requested by @m13v in moazbuilds/claudeclaw#14 (Mega-Post).