Release v0.19.0-nightly.20251123.dadd606c0

What's Changed

• feat(core): Add BaseLlmClient.generateContent. by @joshualitt in https://github.com/google-gemini/gemini-cli/pull/13591
• Turn off alternate buffer mode by default. by @jacob314 in https://github.com/google-gemini/gemini-cli/pull/13623
• fix(cli): Prevent stdout/stderr patching for extension commands by @chrstnb in https://github.com/google-gemini/gemini-cli/pull/13600
• Improve test coverage for cli/src/ui/components by @megha1188 in https://github.com/google-gemini/gemini-cli/pull/13598
• Update ink version to 6.4.6 by @jacob314 in https://github.com/google-gemini/gemini-cli/pull/13631
• chore/release: bump version to 0.19.0-nightly.20251122.42c2e1b21 by @gemini-cli-robot in https://github.com/google-gemini/gemini-cli/pull/13637

Full Changelog: https://github.com/google-gemini/gemini-cli/compare/v0.19.0-nightly.20251122.42c2e1b21...v0.19.0-nightly.20251123.dadd606c0