Site_Web : Fix_Footer

## Objective

Modify the footer to match the new choices in the model.

## Content

<img width="1184" height="429" alt="Image" src="https://github.com/user-attachments/assets/73501666-54eb-4e23-ace2-b43793fa932d" />

## Constraints

All texts must be in traduit.
Do not focus on CSS styles (colors, typography) — to be handled later


