Build an AI wireframe generator for designers and product managers. Features: 1) Text-to-wireframe: user describes a page or screen (e.g. a SaaS dashboard with sidebar nav, KPI cards, and a data table) and AI generates a grayscale wireframe layout, 2) Component library: AI uses standard UI components (headers, nav bars, cards, tables, forms, buttons, image placeholders) placed in a logical layout grid, 3) Multi-screen support: describe a full user flow and AI generates wireframes for each screen with flow arrows between them, 4) Editable canvas: drag, resize, and relabel components after generation, 5) Style controls: toggle between low-fidelity graybox, mid-fidelity with annotations, and high-fidelity with color hints, 6) Export: download as SVG, PNG, or Figma-compatible JSON, 7) Annotation layer: AI adds user flow notes and interaction labels automatically. Clean canvas-based editor with a left sidebar for screen list and a right sidebar for properties.