[JetBrains] Regression: clicking file highlight in chat opens system editor instead of IDE (broke ~v2.1.160)

Description

Before approximately version 2.1.160, clicking a highlighted file path in the Claude Code JetBrains plugin chat panel would open the file directly inside the JetBrains IDE editor. After this version, the same click now opens the system default editor (e.g., TextEdit on macOS) instead.

Steps to Reproduce

1. Open a JetBrains IDE (e.g., IntelliJ IDEA, WebStorm) with the Claude Code plugin installed.
2. Have a conversation with Claude that references a file (e.g., Claude edits or mentions src/main.ts).
3. Click the highlighted file path link in the chat panel.

Expected Behavior

The file opens inside the JetBrains IDE editor (the behavior before ~v2.1.160).

Actual Behavior

The file opens in the OS system default editor (e.g., TextEdit on macOS, Notepad on Windows) instead of the JetBrains IDE.

Regression

This worked correctly before approximately version 2.1.160. The behavior changed somewhere around that release.

Environment

• Claude Code version: >= 2.1.160 (broken), < 2.1.160 (working)
• IDE: JetBrains (IntelliJ IDEA / WebStorm / etc.)
• OS: macOS (possibly also Windows/Linux)

Additional Context

The current workaround is Cmd+Click (macOS) or Ctrl+Click (Windows/Linux) on the file path in the terminal, but this does not apply to the chat panel file highlights — single click used to work and the regression is unexpected.