HQ Scans GIRL ON THE EDGE Now that she's proved she can anchor a multi-billion dollar movie franchise, Kristen Stewart- actress, poet, seasoned road-tripper, and the Valley's coolest rebel- is more than ready to take some serious chances. Kristen Stewart has pulped me. A fine dusting of shredded carrot coats my shirt and jacket lapels, orangey flecks up and down my chest. She is gazing down at the Gelson's supermarket- bought juicer, in mouth-slighty-parted befuddlement familiar to anyone who ever saw Bella Swan dumbstruck by Edward Cullen informing her that, say, he is actually 108 years old. "Oh, my god, I'm so sorry, dude." Back in the living room, where a Bugs Bunny cartoon DVD plays on mute, she lights a Camel filter, slides open the glass doors beyond which her dogs, Cole, Bernie, and Bear, are whimpering and scratching, and then comes back, exhales, and sits, twitching her feet...