Sync feat/mentions-feature with main and resolve conflicts#510

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ngoiyaeric wants to merge 2 commits intofeat/mentions-feature-5204406483989686825from

feat/mentions-feature-5204406483989686825-16238876170461011350

Commits on Feb 8, 2026

Merge main into feat/mentions-feature and resolve conflicts

google-labs-jules[bot]
and
ngoiyaeric
committed

Commits on Feb 9, 2026

Merge main into feat/mentions-feature-5204406483989686825 and resolve conflicts

google-labs-jules[bot]
and
ngoiyaeric
committed