Elyse Betters Picaro / ZDNETFollow ZDNET: Add us as a preferred source on Google.ZDNET's key takeawaysPersonal Intelligence scans your apps to improve Gemini answers.The feature is off by default and won't train on sensitive data. It's only available for paid users at first. The Google ecosystem of apps spans everything from the cornerstone of your workflow, like Gmail, to personal apps like YouTube and Photos. Now, the company is letting Gemini connect across your entire ecosystem for more tail...