Summary: PixAI removed credit pack promotion

Why It Matters: This might mean PixAI is changing how it sells credits.

What Changed:

• Remove "🚀 Up to +40% with Credit Packs!:::" link.
• Remove "Sign in" text.
• Remove "Tools" section with its list of tools.
• Remove "Mobile App" section.
• Remove "Generate" text.
• Remove "Animated" text.
• Update "Chat Editing" link from /generator/chat-editing to /generator/chat-editing/creator.
• Add "PixAI Membership" link to /membership/plans at the top.
• Add "PixAI Membership" link to /membership near the bottom.
• Add "Animation Model v3.0 PixAI" link to /generator/image/animation.
• Update the list of artwork links.