Summary: dadan adds Black Friday deal

Why It Matters: This shows dadan is trying to get more paid users with a big discount.

What Changed:

• A "BlackFriday Deal - Unlock 40% OFF the Pro Annual Plan" banner was added.
• The code "BLACKFRIDAY40" was added.
• A countdown timer for the deal was added.
• The "Introducing AI Assist" banner was removed.