Change how file sync's are ended, and add icons to indicate files that are synced

[WolfGangS]

This change alters when file syncs are "closed".

They are now only closed when either

• The user specifically stops a files sync via context menu.
• The script editor in sl is closed
• The temp file for the script is removed from disk

This means you can now close the viewers temp file in the editor without ending the sync.

There is also a config switch to enable automatically closing the temp file if a master file is been found.

Link Icons

Context menus

File Explorer

File Tab

[Copilot]

Pull request overview

Updates the VS Code extension’s script syncing lifecycle so syncs aren’t automatically ended when the viewer temp file editor tab is closed, and adds UI affordances (decorations + context menu command) to indicate/stop active syncs.

Changes:

• Add a FileDecorationProvider to mark synced master files with a link badge.
• Change SynchService sync teardown rules (remove close-document teardown; add explicit “stop sync”, cleanup on viewer unsubscribe/temp deletion; add optional auto-close of viewer temp file when a master is found).
• Add a new config key + command/menu contributions for stopping file syncs.

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 9 comments.

Show a summary per file

File	Description
src/vscode/SyncedFileDecorator.ts	Adds a file decoration provider to show a “synced” indicator on files.
src/synchservice.ts	Refactors sync creation/lookup/cleanup, registers the decorator, adds context key updates, and changes when syncs are removed.
src/scriptsync.ts	Adjusts ScriptSync construction and cleanup behavior; adds hasFilesToTrack().
src/interfaces/configinterface.ts	Adds ConfigKey.KeepViewerFileOpen.
src/extension.ts	Adds stopFileSync command registration and reorganizes activation code.
package.json	Contributes the new command, menus, configuration option, and a color token for synced decoration.