Method startDownload

frontend/src/lib/ai/modelManager.ts:195–219

(model: LocalModel)

  // Start download process (to be called by WebLLM provider)
  async startDownload(model: LocalModel): Promise<void> {
    const canDownload = await this.canDownloadModel(model.size);
    
    if (!canDownload.canDownload) {
      this.emitProgress({
        modelId: model.id,
        progress: 0,
        stage: 'error',
        message: canDownload.reason || 'Cannot download model',
        error: canDownload.reason,
      });
      throw new Error(canDownload.reason);
    }

    // Emit initial progress
    this.emitProgress({
      modelId: model.id,
      progress: 0,
      stage: 'downloading',
      message: 'Starting download...',
    });

    // The actual download will be handled by WebLLM provider
    // This just tracks the state
  }

  // Handle download completion
  handleDownloadComplete(model: LocalModel): void {