Triple Citrus Ostara Cake

Name: Triple Citrus Ostara Cake
Cuisine: European
Ingredients: cooking spray; 2 lemons; 1 1/2 cups fine sugar; 1 3/4 tsp salt; 6 large eggs (room temperature); 2 3/4 cups all-purpose flour; Extra flour for the pan; 1 large orange; 2 tsp baking powder; 2/4 cup creme fraiche; 1 1/2 stick unsalted butter (melted); 1/3 cup fresh lemon juice; 1/2 cup fine sugar; 3 tbsp fresh orange juice; 1 cup powdered sugar; 2 tbsp butter (softened); 2 tsp orange zest; 1 tbsp fresh lemon juice; whipped cream; candied lemon zest