WASHINGTON—President Joe Biden’s puppy Commander will make his TV debut on Super Bowl Sunday. The German shepherd will appear with Biden’s wife, Jill, in a video message about pet love during Sunday’s broadcast of “Puppy Bowl XVIII” on Animal Planet. The first lady’s office posted the video on Twitter Thursday. Both contests will be held on the day before Valentine’s Day, which is Monday. “Hi there. I’m Jill Biden, here at the White House with our new puppy Commander,” the first lady says. “You know, Valentine’s Day is one of my favorite holidays because it’s all about love.” The first lady, wearing a gray turtleneck sweater with “AMOUR” in pink letters across the front, is seated in the White House movie theater with Commander by her side. “What’s so wonderful about having pets is they bring us unconditional love, joy and comfort every day,” she adds. “All of us are …