Richer contacts, eSign polish & reliability

✨ New Features

• Contacts now support multiple email addresses and phone numbers, each with a primary designation.
• Click a contact anywhere in chat to open a quick contact card.

🔧 Improvements

• Clearer eSign kick-off and send copy so it's obvious what happens at each step.
• Streamlined the eSign delete flow.
• SEO and naming-consistency improvements across the site.

🐞 Fixes

• Preserved list formatting and integrity when undoing tracked changes and copying between documents.
• Fixed the editor so it skips the unsaved-changes prompt when a document is read-only.
• Resolved several settings and profile page bugs.

🔒 Security & Reliability

• Added additional protection against session hijacking when linking a Google (OAuth) account.
• Improved session reliability.