fix: issue #2738

[deadlyjack]

show cancel button instantly when loading files for remote files.

[greptile-apps]

Greptile Summary

The PR improves remote-file loading by immediately exposing cancellation and displaying locally cached content while the remote read completes.

• Uses a zero-delay cancel control for FTP and SFTP directory loading.
• Displays editor-recovery or transport-cache content as a temporary remote-file preview.
• Adds remote-loading tab styling and unit coverage for preview-cache selection.

Confidence Score: 5/5

The PR appears safe to merge.

No blocking failure remains.

Important Files Changed

Filename	Overview
src/pages/fileBrowser/fileBrowser.js	Separates the loader delay from the timer handle, resolving the previously reported duplicate declaration while showing remote cancellation immediately.
src/lib/editorFile.js	Adds remote-file preview loading and tab loading-state management around the existing file lifecycle.
src/lib/editorManager.js	Adds a loading-preview event that renders cached remote text in the appropriate editor pane.
src/utils/remoteFilePreview.js	Selects editor recovery data before the optional transport cache and tolerates transport-cache failures.
tests/unit/remoteFilePreview.test.js	Covers cache precedence, missing and unreadable transport caches, and recovery-cache read failures.

_{Reviews (2): Last reviewed commit: "fix: syntax issue, preview loading delay..." | Re-trigger Greptile}

[deadlyjack]

@greptileai review again

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