Method onHeadChanged

src/utils/git/gitFilesystem.ts:429–438

()

  }

  private async onHeadChanged(): Promise<void> {
    // HEAD changed — could be a branch switch or detach.
    // Defer file I/O (readGitHead, watchFile setup) until scroll settles so
    // watchFile callbacks that land mid-scroll don't compete for the event
    // loop. invalidate() is cheap (just marks dirty) so do it first — the
    // cache correctly serves stale-marked values until the watcher updates.
    this.invalidate()
    await waitForScrollIdle()
    await this.watchCurrentBranchRef()
  }

  private invalidate(): void {
    for (const entry of this.cache.values()) {