feat(ui): card-style explore page with custom list delegate feat(ui): custom explore list delegate with theme styling feat(ui): settings tab custom controls with model cycling feat(ui): styled chat messages with user/assistant labels feat: stream Gemini responses incrementally fix(ui): improve viewport height calculation and loading view alignment fix: dynamic viewport height accounting for notice fix: move notice above viewport to prevent input/footer shift fix: stabilize layout height during loading state fix: validate GOOGLE_API_KEY at startup, nil-guard response handling refactor(gemini): remove logger from service refactor(ui): replace settings list.Model with custom rendered view