Is the villa's lease contract considered terminated or void because it was signed by one party and because its term ended seven years ago, with the tenant refusing to vacate?

Selling a leased property is permissible and does not invalidate the lease contract. The new owner does not have the right to evict the tenant before the term expires. The tenant does not have the right to prevent the owner or buyer from entering the house for inspection if no harm results from it, because the owner has the right to sell his leased property, and this might depend on the inspection. Similarly, the tenant should not prevent something that benefits the owner and does not harm him. If the owner sends the contract associated with the offer to the tenant, the lease is concluded upon the tenant's acceptance. If the contract term ends and is not renewed, the tenant has no right to remain except with a new contract with the new owner, and the latter can complain about him to evict the property. During the contract period, there is no objection for the owner to request the tenant's eviction in exchange for a sum, if they mutually agree.