hailin c1e749e532 fix(co-sign): return join_tokens map for initiator auto-join ... - Add join_tokens (map[partyID]token) to CreateSignSession response - Keep join_token for backward compatibility - Update frontend to use join_tokens[partyId] for initiator auto-join 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>		2025-12-30 19:54:20 -08:00
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http	fix(co-sign): return join_tokens map for initiator auto-join	2025-12-30 19:54:20 -08:00