#12354: fix Issue with mouse coordinates for certain CRS not showing lat, lng for custom geographic CRSs

[mahmoudadel54]

Description

This PR resolves a regression introduced in #11514 where mouse coordinates were not correctly displayed for custom geographic CRS rather than 4326.

Please check if the PR fulfills these requirements

• The commit message follows our guidelines: https://github.com/geosolutions-it/MapStore2/blob/master/CONTRIBUTING.md
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

What kind of change does this PR introduce? (check one with "x", remove the others)

• Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• CI related changes
• Other... Please describe:

Issue

What is the current behavior?

#12354

What is the new behavior?

The mouse position coords are showing now correctly

recording.21.mp4

Breaking change

Does this PR introduce a breaking change? (check one with "x", remove the other)

• Yes, and I documented them in migration notes
• No

Other useful information

For test use:

"projectionDefs": [
    {
      "code": "EPSG:4258",
      "def": "+proj=longlat +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +no_defs +type=crs +axis=neu",
      "extent": [-180, -90, 180, 90],
      "worldExtent": [-180, -90, 180, 90]
    }],

and

{
        "name": "MousePosition",
        "cfg": {
          "editCRS": true,
          "showLabels": true,
          "showToggle": true,
          "filterAllowedCRS": [ "EPSG:4258"],
          "additionalCRS": { "EPSG:3857": {"label": "WEB MERCATOR"},  "EPSG:4326": {"label": "WGS84"}, "EPSG:4258": {"label": "Custom Geographic CRS"}}
        }
      },

[offtherailz]

Successfully created backport PR for 2026.01.xx:

• [Backport 2026.01.xx] #12354: fix Issue with mouse coordinates for certain CRS not showing lat, lng for custom geographic CRSs #12363