sn-ppt-entry

Entry point for PPT generation. Prompts the user to choose a mode (Fast, Standard, or Creative), then collects role, audience, scene, and page_count as needed. In Standard mode it also asks how images should be sourced (AI generation, web search, or none) and whether charts should use AI-generated infographics or ECharts. It parses uploaded pdf/docx/md/txt files, produces task_pack.json and info_pack.json in a new deck_dir, then dispatches to sn-ppt-creative or sn-ppt-standard. Fast mode skips optional questions and proceeds directly to building. Use when the user asks to create a PPT or presentation.