I think I accidentally wrote a patch that also fixes this issue a couple days ago: https://gerrit.wikimedia.org/r/c/mediawiki/extensions/VisualEditor/+/537757

Change 537757 had a related patch set uploaded (by Bartosz Dziewoński; owner: Bartosz Dziewoński):
[mediawiki/extensions/VisualEditor@master] Fix linking to image files in media dialog/context

https://gerrit.wikimedia.org/r/537757

@ti_infotrad Can you elaborate on "Note that a similar issue exists with Media links"? My patch fixes the issue in these two places in the interface, and I'm not aware of any other problems.

@matmarex

• Your fix is for media dialogs; the issue I described is for internal link dialogs (see screenshot below):

• I am mentioning a similar issue because the internal link syntax

[[Media:file name]]

suffers from the same issue.

Oh right, duh. Sorry, I saw you write 'File:' and just completely missed the rest of your bug report.

OK so the change describe by the diff below seems to work, at least for me...
In file modules\ve-mw\ui\contextitemsve.ui.MWInternalLinkContextItem.js

 ve.ui.MWInternalLinkContextItem.static.generateBody = function ( linkCache, model, htmlDoc, context ) {
        var icon, $description,
                title = model.getAttribute( 'lookupTitle' ),
                description = model.getAttribute( 'normalizedTitle' ),
-               href = model.getHref(),
+               href = mw.config.get( 'wgArticlePath' ).replace( '$1', '' ) + title,
                fragment = model.getFragment(),
                usePageImages = mw.config.get( 'wgVisualEditor' ).usePageImages,
                usePageDescriptions = mw.config.get( 'wgVisualEditor' ).usePageDescriptions,

I added a fix for this case too to my patch.

Change 537757 merged by jenkins-bot:
[mediawiki/extensions/VisualEditor@master] Fix linking to pages in media dialog/media context/internal link context

https://gerrit.wikimedia.org/r/537757