fix: exclude environment workspaces from Move/Copy to Workspace dropdown

[BloodShop]

Summary

This PR fixes issue #8837 by correcting the workspace filtering logic in the Move/Copy to Workspace dropdown to exclude environment workspaces.

Problem

When users tried to move or copy requests to different workspaces, the dropdown was incorrectly populated with environments instead of actual workspaces. This made it impossible to properly move requests between workspaces.

Root Cause

The workspace filtering logic was only excluding mock-server workspaces but was accidentally including environment workspaces, which are not valid destinations for moving/copying requests.

Solution

Updated the workspace filter in both modal components to exclude environment workspaces:

Before:

.filter(w => w.scope !== 'mock-server')

After:

.filter(w => w.scope !== 'mock-server' && w.scope !== 'environment')

Files Modified

• packages/insomnia/src/ui/components/modals/request-settings-modal.tsx
• packages/insomnia/src/ui/components/modals/request-group-settings-modal.tsx

Benefits

• ✅ Users now see only valid workspace types (design, collection, mcp) in the dropdown
• ✅ Move/Copy to Workspace functionality works as expected
• ✅ No more confusion with environments appearing in the workspace list
• ✅ Minimal, surgical fix that doesn't break existing functionality

Testing

Verified that the filtering logic correctly excludes both mock-server and environment workspaces while preserving valid workspace types.

Fixes #8837