[Feature Request] Restore session color indicator for merged pull requests

Bug Description
The green session icon that turned purple/blue after a PR merge in the sidebar is no longer visible. Since a recent update, sessions only show a plain circle ○ with no color change after merge. The old behavior (green → purple after merge) was very useful for tracking which sessions had been merged at a glance. Please restore it

Environment Info

• Platform: darwin
• Terminal: Apple_Terminal
• Version: 2.1.27
• Feedback ID: 4d69ed24-f66e-457f-93fa-a7a67f970cad

Errors

[{"error":"Error: Could not resolve authentication method. Expected either apiKey or authToken to be set. Or for one of the \"X-Api-Key\" or \"Authorization\" headers to be explicitly omitted\n    at validateHeaders (/$bunfs/root/claude:360:1013)\n    at buildHeaders (/$bunfs/root/claude:360:8517)\n    at async buildRequest (/$bunfs/root/claude:360:7583)\n    at async makeRequest (/$bunfs/root/claude:360:3411)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-04-04T11:07:06.427Z"},{"error":"Error: Could not resolve authentication method. Expected either apiKey or authToken to be set. Or for one of the \"X-Api-Key\" or \"Authorization\" headers to be explicitly omitted\n    at validateHeaders (/$bunfs/root/claude:360:1013)\n    at buildHeaders (/$bunfs/root/claude:360:8517)\n    at async buildRequest (/$bunfs/root/claude:360:7583)\n    at async makeRequest (/$bunfs/root/claude:360:3411)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-04-04T11:07:06.429Z"},{"error":"Error: Could not resolve authentication method. Expected either apiKey or authToken to be set. Or for one of the \"X-Api-Key\" or \"Authorization\" headers to be explicitly omitted\n    at validateHeaders (/$bunfs/root/claude:360:1013)\n    at buildHeaders (/$bunfs/root/claude:360:8517)\n    at async buildRequest (/$bunfs/root/claude:360:7583)\n    at async makeRequest (/$bunfs/root/claude:360:3411)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-04-04T11:07:07.100Z"},{"error":"Error: Could not resolve authentication method. Expected either apiKey or authToken to be set. Or for one of the \"X-Api-Key\" or \"Authorization\" headers to be explicitly omitted\n    at validateHeaders (/$bunfs/root/claude:360:1013)\n    at buildHeaders (/$bunfs/root/claude:360:8517)\n    at async buildRequest (/$bunfs/root/claude:360:7583)\n    at async makeRequest (/$bunfs/root/claude:360:3411)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-04-04T11:07:07.123Z"},{"error":"SyntaxError: JSON Parse error: Unexpected identifier \"Invalid\"\n    at <parse> (:0)\n    at parse (unknown)\n    at <anonymous> (/$bunfs/root/claude:69:855)\n    at A (/$bunfs/root/claude:11:7244)\n    at MW_ (/$bunfs/root/claude:763:91355)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-04-04T11:07:07.123Z"},{"error":"Error: Could not resolve authentication method. Expected either apiKey or authToken to be set. Or for one of the \"X-Api-Key\" or \"Authorization\" headers to be explicitly omitted\n    at validateHeaders (/$bunfs/root/claude:360:1013)\n    at buildHeaders (/$bunfs/root/claude:360:8517)\n    at async buildRequest (/$bunfs/root/claude:360:7583)\n    at async makeRequest (/$bunfs/root/claude:360:3411)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-04-04T11:07:07.130Z"},{"error":"Error: Could not resolve authentication method. Expected either apiKey or authToken to be set. Or for one of the \"X-Api-Key\" or \"Authorization\" headers to be explicitly omitted\n    at validateHeaders (/$bunfs/root/claude:360:1013)\n    at buildHeaders (/$bunfs/root/claude:360:8517)\n    at async buildRequest (/$bunfs/root/claude:360:7583)\n    at async makeRequest (/$bunfs/root/claude:360:3411)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-04-04T11:07:07.148Z"},{"error":"Error: Could not resolve authentication method. Expected either apiKey or authToken to be set. Or for one of the \"X-Api-Key\" or \"Authorization\" headers to be explicitly omitted\n    at validateHeaders (/$bunfs/root/claude:360:1013)\n    at buildHeaders (/$bunfs/root/claude:360:8517)\n    at async buildRequest (/$bunfs/root/claude:360:7583)\n    at async makeRequest (/$bunfs/root/claude:360:3411)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-04-04T11:07:07.151Z"},{"error":"Error: Could not resolve authentication method. Expected either apiKey or authToken to be set. Or for one of the \"X-Api-Key\" or \"Authorization\" headers to be explicitly omitted\n    at validateHeaders (/$bunfs/root/claude:360:1013)\n    at buildHeaders (/$bunfs/root/claude:360:8517)\n    at async buildRequest (/$bunfs/root/claude:360:7583)\n    at async makeRequest (/$bunfs/root/claude:360:3…

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