Method markModelUsed

frontend/src/lib/ai/modelManager.ts:109–117

(modelId: string)

  // Mark a model as used (update last used timestamp)
  markModelUsed(modelId: string): void {
    const models = this.getDownloadedModels();
    const model = models.find(m => m.id === modelId);
    
    if (model) {
      model.lastUsed = new Date().toISOString();
      this.saveDownloadedModels(models);
    }
  }

  // Remove a model from downloaded list
  removeModel(modelId: string): void {