How did the window suddenly break? Windows normally do not break on their own. Something happen to cause them to break.
The landlord failure to show to repair the window the next day could have been caused by many things
#1 The handy man was not available.
#2 The landlord knew the type of glass and had to order it.
#3. The landlord was not in a position to repair the window because of other commitments.
Either way it was your responsibility to make sure your house was protected until the repairs were made.
How do you know no one would have broken into the house had the window not been broken. Criminals have been know to break windows and doors that were locked. This is conjecture on your part and not fact.
Did your landlord participate in the robbery?
Your landlord has no liability whatsoever in this break in.
You should make a claim against your renters insurance policy for anything stolen. In order to make a claim against your renters insurance policy you would normally need a police report.
If your insurance claim is honored by your insurance company, you would be paid the depreciated value of the items stolen.
The electrical sockets have not been connected how long? Do you have electricity in other portions of the house?
If there is electrical service in the other parts of the house, the sockets might not have been a priority.
A socket cost about 25 cent at Lowe's or Home Depot and require little skill in changing them. This might have been something you could have done.
There are somethings you might consider doing yourself as you are the one residing in the house. Things that your consider important to you would take a backseat to others.
Of course in our law suit happy society, it is popular to blame and sue others, so this might be an avenue you would take.
I hope this has been of some benefit to you, good luck.
"FIGHT ON"