Maybe this can help?
http://www.iofbonehealth.org/calcium-rich-foodsYou can also make milk puddings by just thickening milk with cornflour and adding some flavouring (maybe vanilla or almond essence or ground almonds, a fruit puree/compot). I made some very basic milk pudding like this for DS and he loved it although I thought it was gross. If you home make it, sugar free, you won't feel so bad about her having one every day.
Does she have any cereal with milk on the week day?
Condensed milk can also be used which packs a bigger punch than regular milk (although usually sweetened).
Adding milk powder to the milk she does drink (literally just stir or shake it to mix) and to other recipes is another way to boost the calcium. I got this tip here when mine didn't take much milk and added powdered milk to pancakes.
Ground almonds can be added to pancakes or baked goods quite easily (or other ground nuts)
Tahini paste too (although mine could detect this in any recipe and refused it but others take it well)
And maybe experiment with seafood. I never would have believed mine would eat sprats (or whitebait, very small fish, fried and eaten whole) but he loves them esp with a little lemon juice to dip in, the bones are so fine and cooked hard they are just crunchy and high in calcium.
A simple 'cheese cake' can be made with soft cheese and mashed banana or just a little vanilla mixed through and spread onto digestive or cracker base so it's more of a dessert than a main, or just stirred through to slacken the texture and a bit of fruit mixed through so eaten like a pudding.
There are lots of things to try before chocolate milk - I know the temptation but I don't think chocolate milk is needed.