Add CharacterDataEditDialog with text fields (name, concept, gender), metatype dropdown (Human/Elf/Dwarf/Ork/Troll), number inputs (age, nuyen, karma total/current), and decimal input for essence (0.0-6.0). CharacterHeader card opens edit dialog on tap. All changes propagate through CharacterViewModel immediately. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>