Customer chat widget and phone number matching

New

• Customer chat widget: embeddable chat for websites with AI auto-reply, assigned agents, and per-visitor inquiry history
• Phone number-based user matching (Markly integration)
• On-device speech recognition (STT) support and Live Context extraction
• Widget AI responses count toward workspace AI budget with handoff notice when exceeded
• Workspace storage usage tracking and upload blocking when plan limit exceeded
• Slack import skips files exceeding storage limit with completion notice
• Chat image uploads preserve originals (WebP display, original download)
• Remote meeting transcripts replaced with batch transcription after call ends

Improved

• Improved attachment storage quota calculation accuracy

Fixed

• Fixed attachment loss when converting to-dos
• Fixed message avatar image display errors
• Fixed remote meeting early termination when offline and improved participant leave/end notifications
• Fixed widget message sending and display issues
• Fixed voice recognition keyword JSON parsing errors
• Security hardening: OAuth flows, CORS, Apple login verification, widget access control, rate limiting, production settings