Copilot CLI 1.0.108 adds /index commands, shared code indexing and a Windows sandbox setting

GitHub's Copilot CLI 1.0.108 adds:

• Indexing: new /index commands, and managed shared tgrep indexing is on by default for eligible repositories. Semantic code search can also find renamed repositories when the checkout still uses the old name.
• Sandbox: a sandbox.userPolicy.filesystem.enumeratePaths setting in settings.json for enumerate-only directory grants on Windows. With the sandbox on, a running local MCP server is restarted after /cd so it follows the new directory's denied paths.
• Models: PDF attachments on Grok 4.7 and Grok 4.6 fall back to file references instead of failing the turn. Ctrl+T shows and hides First Pass reasoning when Fusion is selected through a routing profile.
• Behavior changes: interactive CLI sessions now pass local MCP server environment values literally (use ${NAME} to reference a host environment variable); interactive Autopilot waits for your answer to MCP input and consent requests instead of declining them; MCP deny rules now also block a tool under the name its server advertises, even with --allow-all-tools; creating an SDK session with two custom tools of the same name is now an error.
• Other: -p --output-format json output includes session start, resume and model-change events; /limits unset clears session AI credit caps; /changelog can fetch release notes for versions not bundled with the CLI.

The release also carries many fixes to the terminal display, /search, sessions and permission prompts.