feat: reduce zoom sensitivity from 0.075 to 0.04

[dimitrieh]

Description

Reduces the pinch-to-zoom and scroll-to-zoom sensitivity by ~47% to provide a smoother, less aggressive zooming experience. This makes it easier to make fine adjustments to the zoom level without overshooting.

Create less intense zooming for flow previews:

Related Issue(s)

Aids experience of FlowFuse/flowfuse#6310

Checklist

• I have read the contribution guidelines
• Suitable unit/system level tests have been added and they pass
• Documentation has been updated
  • Upgrade instructions
  • Configuration details
  • Concepts
• Changes flowforge.yml?
  • Issue/PR raised on FlowFuse/helm to update ConfigMap Template
  • Issue/PR raised on FlowFuse/CloudProject to update values for Staging/Production
• Link to Changelog Entry PR, or note why one is not needed.

Labels

• Includes a DB migration? -> add the area:migration label

[dimitrieh]

@cstns not super important immediately, but this should reduce sensitivity of zoom for pinch to zoom on trackpad. We need to test it still though.

[cstns]

can't find the branch in the repository

[cstns]

replicated the change on the repo and tested the flow-renderer within the app and I noted two things:

1. the 0.004 is extremely slow zoom action, I' go with 0.2 or 0.25
2. pinch events don't work on the flow-renderer within the flowfuse app, the entire page zooms in, not the flows themselves (albeit this is probably an existing bug/lack of functionality)

[dimitrieh]

pinch events don't work on the flow-renderer within the flowfuse app, the entire page zooms in, not the flows themselves (albeit this is probably an existing bug/lack of functionality)

This must be an existing case of UX debt. We could implement it as part of this PR though.