[Bug] Plugin paths hardcoded with absolute paths fail across environments

Bug Description
Bug: Plugin install paths hardcoded with absolute paths breaks cross-environment usage

When plugins are installed in a devcontainer (username "vscode"), the paths in ~/.claude/plugins/installed_plugins.json are stored as absolute paths like /home/vscode/.claude/plugins/cache/.... When switching to the host machine (different username), plugin operations fail because these paths are hardcoded and don't exist.

The config should use relative paths from ~/.claude or dynamically resolve based on the current user's home directory, not store absolute paths that become invalid when the environment changes.

Workaround: Manually edit installed_plugins.json to fix the paths for each environment.

Environment Info

• Platform: darwin
• Terminal: ghostty
• Version: 2.0.76
• Feedback ID: