[Feat]: Adding AI and security in Chat's and Other functionality

<img width="1470" height="923" alt="Image" src="https://github.com/user-attachments/assets/6810c265-831f-4b09-9847-0388d2488bc1" />

Features -

- so Ai can Understand our msg and help the user to rewrite it.
- using calendar lawyer can schedule the meeting with client & have a video conference online.
- make chat secure with no tamper the chats and misuse it.
   