photoshop_get_state

Return a cheap read-only snapshot of Photoshop session state (active document, layer, selection). Use when: before any tool that needs an active document/layer, or after an error to recover context. Do NOT use when: you only need a visual preview — use photoshop_get_preview instead. Returns: JSON with hasDocument, document.id/name/dimensions/colorMode, activeLayer kind/name, hasSelection. Capture document.id and pass it as document_id on later mutating calls. Preconditions: none (safe on empty session). Side effects: none.