Print boards and cards with configurable components and named print profiles
⌘P had no story: KanbanApp removed the platform's Print row outright on 11-command-nexus.md's "No Print story in v1 (⌘P unused)" line. That line retires. File ▸ Print… now prints the board in front — lanes left to right, each lane's cards top to bottom, as a linear document rather than a picture of the strip — or, from a card window, that card. The trash is unreachable by construction: it is a sibling container of `lanes`, not a lane. The rules live in a pure layer nothing AppKit can reach. `PrintOptions` is one Codable value carrying the printing card's five bullets — which components (title, icon+labels line, rendered body, comments off by default with either reading order), page breaks, one base face and size every other size derives from, and a toggleable running head and foot. `PrintSource` is what is being printed, frozen at ⌘P so the panel's repeated relayouts and a board reloading underneath cannot disagree. `PrintDocumentBuilder` turns the pair into a block list, which is where every decision a rendered page hides becomes something a test can hold: component order, comment ordering, and page-break markers that are markers rather than whitespace. Empty is empty all the way up — a card with nothing to print consumes no page break, and a lane whose cards all dropped out takes its heading with it. A page break is a pagination fact, not a spacing one. TextKit has no page-break character, so `PrintDocumentView` splits the document into sections at its breaks and flows each into as many page-sized text containers as it needs: a container boundary *is* a sheet boundary, at any paper size with any margins. Bodies come from the app's one Markdown pass — `BodyMarkup.parse` into `BodyMarkupRenderer` — re-faced run by run so the chosen family reaches the text and fixed-pitch code keeps its own, and drawn under a forced light appearance so the card window's dynamic label colours do not print white. Options ride in the print panel's own accessory rather than a pre-flight sheet of ours, which buys the system's live preview of the real paginated document; the preview refreshes through one KVO revision counter rather than thirteen mirrored properties. Profiles persist app-side in UserDefaults, never in board files — a print profile is how this user likes to read, not what a board is (`BoardZoomStore`'s argument). A name is a profile's identity, folded case-insensitively; "Last Used" is reserved in every spelling, kept out of the stored list, and captured when an operation actually ran, so a cancelled print rewrites nothing. Both decoders are total: one unrecognized key must not cost a user every profile they saved. DESIGN/11-command-nexus.md gains the Print row and loses the sentence saying it would never have one. Claude-Session: https://claude.ai/code/session_014PtZdPwqZuqEDLc6wZMtEy
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