diff --git a/.claude/settings.local.json b/.claude/settings.local.json
index 1e6cea49..eb349339 100644
--- a/.claude/settings.local.json
+++ b/.claude/settings.local.json
@@ -505,7 +505,8 @@
       "Bash(git commit -m \"$\\(cat <<''EOF''\nfeat\\(service-party-app\\): add transfer functionality with co-sign integration\n\nAdd complete KAVA transfer feature to the wallet home page:\n\nFrontend \\(React\\):\n- Home.tsx: Add transfer modal with address/amount input, transaction\n  confirmation, and co-sign session initiation\n- Home.module.css: Transfer modal styles \\(form, confirm, error states\\)\n- CoSignSession.tsx: Add transaction broadcast after signing completion,\n  with block explorer link\n\nUtils:\n- transaction.ts: EIP-1559 transaction building, RLP encoding, Keccak-256\n  hashing, nonce/gas fetching, transaction broadcast via JSON-RPC\n\nFlow: Wallet -> Transfer Modal -> Prepare TX -> Confirm -> Co-Sign ->\n      Sign Session -> Broadcast -> Block Explorer\n\n🤖 Generated with [Claude Code]\\(https://claude.com/claude-code\\)\n\nCo-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>\nEOF\n\\)\")",
       "Bash(powershell -Command:*)",
       "Bash(powershell -Command \"\n$content = Get-Content ''main.ts'' -Raw\n\n# 修改 threshold 部分\n$old1 = @''\n          threshold: {\n            t: activeCoSignSession?.threshold?.t || 0,\n            n: activeCoSignSession?.threshold?.n || 0,\n          },\n''@\n\n$new1 = @''\n          threshold: {\n            // 优先使用 API 返回的阈值，回退到 activeCoSignSession\n            t: result?.threshold_t || activeCoSignSession?.threshold?.t || 0,\n            n: result?.threshold_n || activeCoSignSession?.threshold?.n || 0,\n          },\n''@\n\n$content = $content.Replace\\($old1, $new1\\)\n\n# 修改 participants 部分\n$old2 = ''participants: result?.parties?.map\\(\\(p: { party_id: string; party_index: number }, idx: number\\) => \\({''\n$new2 = ''participants: \\(\\(result as { participants?: Array<{ party_id: string; party_index: number; status: string }> }\\)?.participants || []\\).map\\(\\(p, idx\\) => \\({''\n\n$content = $content.Replace\\($old2, $new2\\)\n\n# 修改 status 部分\n$old3 = \"\"            status: ''ready'',\"\"\n$new3 = \"\"            status: p.status || ''waiting'',\"\"\n\n$content = $content.Replace\\($old3, $new3\\)\n\n# 修改结尾部分\n$old4 = ''          }\\)\\) || [],''\n$new4 = ''          }\\)\\),''\n\n$content = $content.Replace\\($old4, $new4\\)\n\nSet-Content ''main.ts'' -Value $content -NoNewline\nWrite-Output ''Done''\n\")",
-      "Bash(node fix_main.js:*)"
+      "Bash(node fix_main.js:*)",
+      "Bash(git commit -m \"$\\(cat <<''EOF''\nfeat\\(co-sign\\): add debug logs for auto-join flow in CoSignJoin\n\nAdd console.log statements to trace the auto-join logic:\n- Log loaded shares with sessionId\n- Log auto-select share matching check\n- Log auto-join conditions and share match status\n- Log validateInviteCode results including joinToken\n- Log handleJoinSession parameters\n\n🤖 Generated with [Claude Code]\\(https://claude.com/claude-code\\)\n\nCo-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>\nEOF\n\\)\")"
     ],
     "deny": [],
     "ask": []
diff --git a/backend/mpc-system/services/service-party-app/src/components/Layout.tsx b/backend/mpc-system/services/service-party-app/src/components/Layout.tsx
index 10a3fba0..c239d994 100644
--- a/backend/mpc-system/services/service-party-app/src/components/Layout.tsx
+++ b/backend/mpc-system/services/service-party-app/src/components/Layout.tsx
@@ -11,7 +11,7 @@ const navItems = [
   { path: '/', label: '我的钱包', icon: '🔐' },
   { path: '/create', label: '创建钱包', icon: '➕' },
   { path: '/join', label: '加入创建', icon: '🤝' },
-  { path: '/sign', label: '参与签名', icon: '✍️' },
+  { path: '/cosign/join', label: '参与签名', icon: '🔥' },
   { path: '/settings', label: '设置', icon: '⚙️' },
 ];