v7.3.0

What's New

Gap-fill recovery

• Detects gaps in message ID sequences using SQL LAG() window function
• Recovers skipped messages from Telegram API automatically
• Available as CLI subcommand (fill-gaps --chat-id --threshold) and scheduler option (FILL_GAPS=true)
• Respects all backup config rules (CHAT_IDS, CHAT_TYPES, exclude lists)
• Robust error handling: continues on per-chat/per-gap errors, reports summary with error count
• Stats automatically recalculated after recovery

Token URL auto-login

• Shareable links with ?token=XXX parameter for direct viewer access
• Token is stripped from URL after login via history.replaceState
• Warning note about token exposure in server access logs

UX improvements

• @username display in chat list and message headers
• Shareable link generation UI in admin panel

Testing

• 31 new tests for gap-fill (detect gaps, fill gaps, config, edge cases)
• Full async test coverage with real SQLite + AsyncMock for Telegram client