Remove duplicate filename display in displayFileContent

[Copilot]

The displayFileContent function displayed filenames twice: once as an info line and again as the collapsible group title.

Changes

• Consolidated filename and size into the startGroup() call only
• Removed the separate core.info() line that duplicated the filename
• Updated special case messages (empty files, unsupported types, too large files) to include filename consistently

Before

core.info(`  ${fileName} (${stats.size} bytes)`);  // First display
// ... checks ...
core.startGroup(fileName);  // Second display (duplicate)

After

// ... checks ...
core.startGroup(`${fileName} (${stats.size} bytes)`);  // Single display

Special cases now format consistently: ${fileName} (empty file), ${fileName} (content not displayed for .pdf files), etc.

Original prompt

Update javascript displayFileContent to avoid duplicating the filename as a title and in the region.

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[Copilot]

Pull request overview

This PR removes duplicate filename display in the displayFileContent function. Previously, the function displayed filenames twice: once via core.info() and again as the collapsible group title. The changes consolidate all filename displays into a single location - either in the startGroup() call for displayable files, or in a single core.info() call for special cases (empty files, unsupported types, or files too large to display).

Changes:

• Removed the duplicate core.info() line that displayed file size information before content display
• Updated startGroup() call to include both filename and size in the title
• Consolidated special case messages (empty, too large, unsupported types) to include filename in a single info line

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
actions/setup/js/display_file_helpers.cjs	Removed duplicate filename display; consolidated filename and size into startGroup() title; updated special case messages to include filename
actions/setup/js/display_file_helpers.test.cjs	Updated all tests to verify filename appears in startGroup() calls instead of separate info() calls; updated special case test expectations

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