[Bug] `claude update` downloads but doesn't register in PowerShell PATH after installation

Bug Description
issue #40987, problem with "claude update" in powershell that download the update but don't appear when i launch "claude" after it.

Environment Info

• Platform: win32
• Terminal: vscode
• Version: 2.1.114
• Feedback ID: 2da784b4-28b3-47e1-871a-d5d7066789a0

Errors

[{"error":"Error: Plugin MCP server error - mcp-config-invalid: MCP server github invalid: Missing environment variables: GITHUB_PERSONAL_ACCESS_TOKEN\n    at PjH (B:/~BUN/root/src/entrypoints/cli.js:2807:30077)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-04-18T23:20:36.136Z"},{"error":"Error: Plugin MCP server error - mcp-config-invalid: MCP server github invalid: Missing environment variables: GITHUB_PERSONAL_ACCESS_TOKEN\n    at PjH (B:/~BUN/root/src/entrypoints/cli.js:2807:30077)\n    at async G (B:/~BUN/root/src/entrypoints/cli.js:6187:11023)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-04-18T23:20:36.558Z"},{"error":"Error: Plugin MCP server error - mcp-config-invalid: MCP server github invalid: Missing environment variables: GITHUB_PERSONAL_ACCESS_TOKEN\n    at PjH (B:/~BUN/root/src/entrypoints/cli.js:2807:30077)\n    at async V (B:/~BUN/root/src/entrypoints/cli.js:6187:11830)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-04-18T23:20:36.558Z"},{"error":"Error: Plugin MCP server error - mcp-config-invalid: MCP server github invalid: Missing environment variables: GITHUB_PERSONAL_ACCESS_TOKEN\n    at PjH (B:/~BUN/root/src/entrypoints/cli.js:2807:30077)\n    at async G (B:/~BUN/root/src/entrypoints/cli.js:6187:11023)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-04-18T23:20:36.708Z"},{"error":"Error: Plugin MCP server error - mcp-config-invalid: MCP server github invalid: Missing environment variables: GITHUB_PERSONAL_ACCESS_TOKEN\n    at PjH (B:/~BUN/root/src/entrypoints/cli.js:2807:30077)\n    at async V (B:/~BUN/root/src/entrypoints/cli.js:6187:11830)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-04-18T23:20:36.709Z"},{"error":"Error: ENOENT: no such file or directory, unlink 'C:\\Users\\aboys\\AppData\\Local\\Temp\\claude\\C--Users-aboys-Documents-Simplon-Projet-Chef-Oeuvre-greentech-intelligence\\7a84cf6c-f795-429f-a6ab-a57f8ef49d47\\tasks\\a6a967c25b166f4fd.output'\n    at async <anonymous> (B:/~BUN/root/src/entrypoints/cli.js:7962:299)","timestamp":"2026-04-18T23:22:33.330Z"}]