v0.26.12: Eval tooling upgrades, model catalog refresh, and reliability-focused TUI fixes

New features

- /review command that provides an interactive code review workflow. Review code changes in different ways: comparing against a base branch, reviewing specific commits, examining uncommitted changes, or providing custom review instructions.

Bug fixes

- Gemini 3 Pro now uses the updated 0.8× pricing multiplier - replacing introductory pricing
- MCP navigator now fills the terminal
- Update routing for /resume to filter correctly to /sessions
- Position cursor at start when navigating history
- Make all views in the mcp navigator full width
- Fixed garbled character rendering on Windows
- Unify LLM retry logic and do more retries in exec mode
- Removed the deprecated Figma MCP server