Release v2.14.0

What's Changed

• feat(apps): interactive headless widget sessions — mcpjam apps session by @chelojimenez in #2733
• Add create_eval_suite: author runnable eval suites from CLI and MCP by @chelojimenez in #2750
• fix(sidebar): don't flash signed-out layout while auth resolves by @chelojimenez in #2753
• feat(nux): route brand-new signups to Playground, keep returning users on Home by @chelojimenez in #2755

Full Changelog: v2.13.0...v2.14.0