V9.1 fix export: SVG sanitize before export, full diagnostics, backup PPTX fallback

V9 Exceptional: more design styles/patterns + web research + editable plan + Groq Llama-4-Scout vision image verification

V8 Exceptional Tool: web research, editable plan JSON, ultra quality multi-agent pipeline

V7 Ultimate Quality: Strategist + GPT-OSS Executor + HY3 Art Director + quality repair loop + original PPT Master gates

V6: Multi-model — HY3 for Strategist + GPT-OSS-120B for Executor SVG (2-3x faster, higher quality)

V5.1: Premium SVG quality — filters, gradients, letter-spacing, visual hierarchy rules from real examples

V5: Full PPT Master workflow — Strategist + spec_lock + Executor LLM SVG + finalize + export

V4: LLM-generated SVG slides for high quality output

Fix v3: max_tokens=32000, shorter prompt, JSON repair for truncated responses

Fix: increase max_tokens to 16000, simplify prompt for HY3

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