v1.4.0 - Proper Exaggerated Caricatures

Major Fix: Caricature output now matches pixelbin.io quality

Root cause found: Reverse-engineered the pixelbin.io/ai-tools/caricature-maker source code and discovered it does NOT use portrait/generate at all. It uses img/edit (AI Image Editor) with a highly specific caricature prompt via a Boltic workflow.

Changes:

• Switched default method from portrait/generate (which only does basic 3D portraits with no prompt support) to img/edit (AI Image Editor with prompt + image input)
• Uses the exact caricature prompt pattern from pixelbin.io — produces proper exaggerated 3D caricatures with enlarged heads, wide-eyed smiles, and studio lighting
• Mouse character features (ears, nose, whiskers) integrated into the prompt