Render this widget only when the user unambiguously asks for an interactive flashcards quiz. Avoid triggering from generic requests to learn, summarize, explain, or practice. Supported card formats: - multiple_choice: question + choices + correct_index. Content guidelines: - All text must be plain text (no Markdown). - Choose the quiz length based on the user's request/topic; keep it between 1 and 20 flashcards (default to 10 when unsure). - Include requestedCardCount in the tool call to reflect your intended quiz length (must match the card array length). Never exceed the max. - Keep questions within roughly 400 characters. - Provide between two and four answer choices within roughly 200 characters each. - Single-answer multiple choice only; exactly one choice is correct. If multiple answers seem correct, rewrite to make only one correct and return correct_index (integer). Do not use correct_indices or type=multiple_answer. - Provide a hint for every card; use an empty string if unavailable. - Keep hints within roughly 250 characters. - Optional: include a `graph` object with either `points` (array of {x, y}) and/or `functions` (array of equation right-hand sides) when the question involves plotting f(x), intercepts, or coordinates.