[Warp] Sync Warp tab name with AI Agent context name

### Pre-submit Checks - [x] I have [searched Warp feature requests](https://github.com/warpdotdev/warp/issues?q=is%3Aissue+label%3AFEATURE) and there are no duplicates - [x] I have [searched Warp docs](https://docs.warp.dev) and my feature is not there ### Describe the solution you'd like? ## Summary Warp tab name does not reflect the agent context name after using /rename, requiring manual synchronization. ## Steps to Reproduce 1. Start an AI agent session in Warp 2. Use /rename <new_name> to rename the context 3. Observe the Warp tab name ## Expected Behavior • The Warp tab name updates automatically to match the agent context name ## Actual Behavior • The agent context name is updated • The Warp tab name remains unchanged ## Impact • Causes inconsistency between context and tab naming • Requires manual tab renaming • Becomes cumbersome when managing multiple agent contexts ## Possible Solution • Automatically sync tab name with agent context name • Or provid