Release v0.26.1

What's Changed

• fix(startup): skip cloud recents when logged out by @carenthomas in #2466
• fix(startup): keep no-model label on local resume by @carenthomas in #2465
• feat(tui): add rotating empty-composer prompt hints by @carenthomas in #2469
• fix(startup): hide reasoning for no-model placeholder by @carenthomas in #2470
• fix(login): stop aborting OAuth polling on rerender by @carenthomas in #2471
• feat(agents): add login action to Constellation empty state by @carenthomas in #2472
• fix(startup): clear no-model placeholder after connect by @carenthomas in #2473
• feat(connect): allow cancelling OAuth flow with Esc by @carenthomas in #2474
• revert(agents): remove pinned-tab recent-agent fallback by @carenthomas in #2476
• fix(startup): infer backend from explicit agent id by @carenthomas in #2477
• chore: bump version to 0.26.1 by @github-actions[bot] in #2478

Full Changelog: v0.26.0...v0.26.1