Summary: Removed Wan 2.2 Flash promotion

Why It Matters: Pollo AI no longer promotes Wan 2.2 Flash.

What Changed:

• Removed "Wan 2.2 Flash Video Model Is Now Available on Pollo AI!"
• Removed "Wan 2.2 Flash is Alibaba's upgraded video model featuring lightning-fast, precise generation, cinematic realism and fluid motion. Try it now!"
• Removed "Try it now" button linking to image-to-video page
• Updated prompt ideas from "Frosted Pane Desert Wanderer Sleepy Sentries Starry Shift" to "Wind Walker Nighttime Musician Urban Green Fluttering Wings"