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Describe the bug

JSON errors are not marked in the gutter, while the same setup works for other languages e.g. SQL.

Code sample

    gutter_style = fce.GutterStyle(
        text_style=ft.TextStyle(
            font_family="monospace", size=10
        ),
        show_line_numbers=True,
        show_folding_handles=False,
        show_errors=True,
        width=80,
        margin=0,
    )

    editorSrc = fce.CodeEditor(
        language=fce.CodeLanguage.JSON,
        code_theme=fce.CodeTheme.ATOM_ONE_LIGHT,
        gutter_style=gutter_style,
        value="",
        expand=True,
        text_style={
            "size": 13
        },
    )

To reproduce

Add some valid JSON. Now remove some comma or bracelet - nothing changes in the gutter.
Change language to SQL, add some SQL, make it invalid - errors are marked correctly.

Expected behavior

Should work with JSON as well.

Screenshots / Videos

Operating System

macOS

Operating system details

macOS 15.7.4

Flet version

Flet 0.82.2 on macOS 15.7.4 (x86_64) Python 3.12.10

Regression

I'm not sure / I don't know

Suggestions

No response

Logs

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Additional details

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