[agent.meimei] Implement AI SDR analytics dashboard

MeiMei should to see how MeiMei's outreach performs so I can improve targeting, messaging, and sequences from evidence. The expected result is dashboard for campaign performance, replies, delivery problems, and conversion signals that creates one clear shared understanding for both product and development. ## Objective Build the AI SDR analytics dashboard control surface for `agent.meimei` so the team has a concrete implementation target instead of a vague idea fragment. ## Unified Context In the 10-hour OpenClaw masterclass, The email engine chapter repeatedly returns to campaign analytics, delivery, and learning from prior sends. This card turns that source idea into a product-grade control surface for `agent.meimei`. It exists to replace vague intent with a clear contract that product owners can understand and developers can deliver against. Without this card, the surrounding architecture has to rely on ad hoc decisions, implicit prompt behavior, or tribal knowledge. That creates