[Bug] IDE detection fails with SSE port connection error on Windows

Bug Description
환경

• OS: Windows (native, not WSL)
• Claude Code CLI: 2.1.23
• JetBrains Plugin: 0.1.14-beta
• IntelliJ IDEA: 2025.3.2

문제
IDE integration stopped working. /ide shows "No available IDEs detected"

상황

• Plugin installed and enabled …

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