“Disability” is broadly construed and includes an impairment that is episodic or in remission that substantially limits a major life activity when active. Tex. Lab. Code Ann § 21.0021(a)(1), (2). In chapter 21, “major life activity” includes, but is not limited to caring for oneself, performing manual tasks, seeing, hearing, eating, sleeping, walking, standing, lifting, bending, speaking, breathing, learning, reading, concentrating, thinking, communicating, and working.