fix(git): default file name from name on create & show file name for MCP in settings [INS-2630]

[pavkout]

What

When creating a workspace (collection, doc, mock server, environment, MCP client) in a Git-backed project, the form asks for both a Name and a File name. Previously the File name didn't follow the Name, so users had to type the same thing twice.

This PR:

• Defaults the File name from the Name in the create modal. As you type the Name, the File name follows it (run through the existing safeToUseInsomniaFileName sanitizer, e.g. My Collection → my_collection.yaml). Once you manually edit the File name, we stop overriding it so your custom value sticks.
• Shows the File name field for MCP clients in the Workspace Settings modal. It was the only Git-backed type where the field was hidden (!isMcp), even though the create modal collects a file name for it and the update route already stores gitFilePath generically. This makes create/settings consistent and lets you rename the MCP file.

The File name field stays fully editable and we don't lock it down or block on duplicates — we're only defaulting it. This applies to all five workspace types via the shared Name field; no per-type handling.

How to test

1. Open a Git-backed project.
2. Create a Collection / Doc / Mock Server / Environment / MCP Client.
3. Type a Name → the File name updates to match (sanitized).
4. Manually edit the File name → it no longer follows the Name.
5. Open Settings on an MCP client in a Git project → the File name field is now shown and editable.

Notes

• Mock servers already showed the File name in both modals; the only type-based hiding was MCP-in-Settings, which this PR removes.
• Import/clone flows are unaffected (the file name comes from the imported file).

[Copilot]

Pull request overview

Updates the Git-backed workspace UX so users don’t have to type the same “Name” and “File name” twice when creating workspaces, and aligns MCP client settings with the other Git-backed workspace types by exposing the file name field in settings.

Changes:

• Derive the “File name” from “Name” in the new workspace modal until the user manually edits the file name.
• Show the “File name” field for MCP clients in the workspace settings modal (Git projects).
• Keep using the existing safeToUseInsomniaFileName* sanitization path for Git file naming.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
packages/insomnia/src/ui/components/modals/workspace-settings-modal.tsx	Removes the MCP-specific hiding of the Git “File name” field in workspace settings.
packages/insomnia/src/ui/components/modals/new-workspace-modal.tsx	Adds “name → fileName” defaulting behavior with a manual-edit opt-out flag.

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