6 boneless, skinless chicken thighs (about 1 1/2 pounds), trimmed
1/4 teaspoon salt
1/4 teaspoon freshly ground pepper
1 1/4 teaspoons ground cinnamon, divided
1 1/4 teaspoons ground cumin, divided
2 tablespoons extra-virgin olive oil, divided
1 medium onion, thinly sliced
1 14-ounce can diced tomatoes, with juice
1 15-ounce can chickpeas, rinsed
1 cup reduced-sodium chicken broth
4 tablespoons chopped fresh cilantro, divided
1 orange, scrubbed, halved and cut into 1/4-inch slices
1 cup whole-wheat couscous