No.
"She’s lucky she wasn’t charged with attempted kidnapping when she tried to stop them."
She didn't forcibly detain them, until she had to defend herself.
My post about her being charged with kidnaping was sarcasm. As it was, she, not the criminals was charged and she had to go to the time and expense to defend herself in court.
You are right, shoplifting is still a crime in California. But the prosecutor has to prove you entered the store with the intent to steal. And it is, with some exceptions a misdemeanor.
From a Cal lawyer website:
In order to convict you of shoplifting, a prosecutor will have to prove that:
You entered an open commercial establishment during normal business hours,
You intended to steal merchandise worth $950 or less.