Duplicate a deck from its current plan onto a new draft (free).

Duplicating a deck makes a NEW draft deck that carries the source deck's CURRENT plan — every chapter with its edits, the deck's intent, its black interludes and montage marks — and the choices made on the deck itself (the narrator cast for it, its delivery class, its strategic target), and leaves the source deck untouched. Nothing rendered rides along: no takes, cuts, masters, share links or coverage reports. It is free and renders and reserves nothing; the copy's plan is queued for coverage, and its next step is approve_pitch_deck_plan on the NEW deck's jobId (CLI: pitch-deck approve-plan <newJobId>). Any status may be duplicated — a draft, a deck in review or complete, a failed deck — as long as its plan reads as a plan today; one that does not is refused with 409 pitch_deck_state_invalid (details.refusal.code: pitch_deck_duplicate_no_plan) and nothing is created. A given title is the copy's DISPLAY NAME — the name its lists show it by — and never a title for its plan, which comes along unchanged; without one the copy keeps the source's name. NOT metered and NOT confirmed. Requires Idempotency-Key. Scope: story:write.