Stop transient file conflict callouts (#2694)

* fix(app): prevent transient file conflict callouts

Watcher versions are candidates until a matching disk read settles them. The editor now classifies the settled bytes once, preserving dirty buffers and keeping reload content paired with its revision.

* fix(app): preserve external BOM changes

packages/app/src/file-explorer/read-result.ts

@@ -12,6 +12,7 @@ export function explorerFileFromReadResult(file: FileReadResult): ExplorerFile {
     mimeType: file.mime,
     size: file.size,
     modifiedAt: file.modifiedAt,
+    revision: file.revision,
   };
 }