Summary: LiblibAI makes video generation free

Why It Matters: This change makes a key feature more accessible to users.

What Changed:

• The "登录即可获得 新人创作体验包" (New User Creation Experience Pack) section was removed.
• "视频生成" (Video Generation) now says "免费" (Free).
• Two new video effects, "Emergency舞蹈" and "致幻百合", were added.
• The "免算力" (Free compute power) text was removed from the bottom of the page.