AI will accept peace giving you cities at 100% of an Era score, which is no sense

[bumpyglint]

The AI should never accept a peace deal that grants cities when an Era is about to end in just a few turns. It makes no sense since the war will automatically end between Eras. While a peace deal typically includes a 10-turn treaty, declaring war on turn 1 of a new Era is usually challenging and often less beneficial than the previous situation (where probably, if the AI wanted to make peace, you had units attacking cities). Given this, the AI should have a strong disincentive—if not outright refusal—to accept peace deals near the end of an Era.