photoshop_get_capabilities

Return version-aware feature flags for the installed Photoshop (Select Subject v2, Generative Fill, etc.). Use when: once per session before suggesting AI-powered features or gated recipes. Do NOT use when: Photoshop version is already known from photoshop_get_version. Returns: JSON { version, features: { select_subject_v2, generative_fill, ... } }. Preconditions: none. Side effects: none.