A picture off the pasteboard becomes a card's file, its hero, or the board's backdrop

⌘V grows an image-data branch, below the app's own clipboard format and refused
outright while a file URL is on the pasteboard: a screenshot or a browser's Copy
Image lands as "Pasted Image.png" in the anchor card's attachments/, through the
very import path Finder file drops and ⇧⌘A take — one bracket, one Finder-style
collision ladder, one set of banners, and the same silence a drop's arrival has.
A card window's ⌘V pastes onto its own card; a focused text field still wins the
selector natively. A file-shaped flavor travels byte for byte, PNG preferred when
several are offered; TIFF and BMP are re-encoded to PNG, being interchange
encodings rather than files anyone wants in a folder.

The hero key gets the setter it was born owing: "Set as Hero" on any image row of
the attachment list, "Remove Hero" on the row that holds it, with menu-bar twins
so the context entry is nobody's only home. It writes as a restyle — one key, one
bracket, one invertible step on the window's own stack — and replaces rather than
refusing, because a card has one hero and the row that has it says Remove instead.

Edit ▸ Paste as Board Background is the same payload's other destination, taking
the existing background.image convention at its word: the picture into the board
folder as "Pasted Background.png", the colour subkey untouched, the generator's
overwrite-our-own-name rule inherited and its echo memo taught to tell the two
producers apart.

Claude-Session: https://claude.ai/code/session_014PtZdPwqZuqEDLc6wZMtEy

DESIGN/04-interactions.md

@@ -28,6 +28,7 @@ Selection, drag & drop, keyboard, clipboard, search. This is where the old app s
 - ⌘X/⌘C/⌘V on cards **and lanes** (resettled — lanes joined the clipboard so cross-board structure transfer has a keyboard path under the every-function contract; the cards-XOR-lanes selection rule means the clipboard holds cards or lanes, never both). Hybrid clipboard: pasteboard carries a JSON manifest + plain text; full folder snapshots staged app-side (02-architecture.md ▸ Per-board app state's app-wide home) so paste reproduces the item byte-for-byte — cards, attachments and all — across boards. Each manifest entry embeds the full `index.md` — identification metadata (menu validation, refusal wording, the plain-text flavor's source), **never a materialization source** since the 2026-07-29 refuse-don't-degrade ruling below (a lane entry embeds its cards' too). **Staging lifecycle** (settled): snapshots are staged **eagerly at ⌘C/⌘X time** — copy captures the source as it is at the gesture, immune to later deletion or unmount — and the store holds at most the *current* copy: a new Lanework copy replaces the previous snapshot, and a sweep at launch and on each copy purges entries the pasteboard no longer references (another app taking the pasteboard orphans the snapshot; the next sweep collects it). The snapshot survives relaunch exactly as long as the pasteboard still points at it — a copy made before quitting pastes whole after restart. **A paste is an import boundary, so normalization applies** (settled 2026-07-28 — 01-storage-format.md's loose-file rule): loose files the staged snapshot carries beside a card's `index.md` land in the pasted card's `attachments/`, Finder-renamed on collision — nothing the snapshot preserved is dropped on arrival. **A paste whose staged snapshot is missing or unreadable refuses loudly — never degrades** (re-ruled 2026-07-29, retiring the degraded embedded-`index.md` fallback and its loss row; Finder's invariant adopted, and 01's leniency doctrine applied — proceed-partially-lose-a-little is never a verdict): the paste produces **nothing**, and a one-shot failure banner names it from the manifest's metadata ("The copied cards are no longer available" / "Couldn't paste 'Fix login' — the copied content is gone"; BannerCenter owns the phrasing). An item arrives **whole — index, attachments, loose files, and comments when they ship — or not at all**; a hollowed card is never materialized, so the loss-accounting problem (what didn't arrive, and whether the totals are honest) dissolves rather than being solved. The refusal is transactional — all-or-nothing for the whole paste, the copies-are-transactions posture (01). With eager staging and the shared-store sweep discipline this is a rare corner, not a flow: the refusal names it, and ⌘C again is the recovery. **The pasteboard is re-read lazily, and the brief lie is accepted** (settled): changeCount is checked on activation, on menu validation, and before paste — no timers; a background app taking the pasteboard while Lanework stays frontmost can leave Edit ▸ Paste enabled until the next check, and the paste itself re-validates and no-ops — nothing stale ever lands, which is the guarantee that matters.
 - **Cut is Finder-style deferred**: cut items dim in place until paste moves them; voided if another app takes the pasteboard or the source board closes; second paste materializes copies. **Deletion voids per item**: a cut item that is deleted (moved to the trash or destroyed) or vanishes externally before paste drops out of the pending cut — 02-architecture.md's UUID-set rule; transient state never resurrects what's gone — so paste moves only the survivors, and a cut voided down to nothing is simply void (paste disabled, no error).
 - Paste lands after the anchor card (or appends to a selected lane); a multi-selection anchors at its last member in flatten order — the ⌘N target rule's shared anchor (The map below). Copies keep `created` (a duplicate is a fork) and take fresh GUID/`order`/`modified`. **A trash selection never anchors paste** (settled — the ⌘N target rule's own wording, returned to the precedent it cites): ⌘V stays enabled and behaves exactly as with nothing selected — a card payload appends to the last-active lane, a lane payload lands at the board's right end; the trash is never the destination (▸ The trash), and a trashed card's live disk-lane never leaks in as "the selected card's lane".
+- **⌘V's image-data branch** (ruled 2026-08-09): when the pasteboard carries **raw image data and no file URL** — a screenshot, a browser's Copy Image, Preview's ⌘C — ⌘V lands the picture as a new file in a card's `attachments/`. **Precedence, in one order**: the app's own clipboard type wins outright (a Lanework copy still pastes as cards or lanes); a **file URL** on the pasteboard suppresses the branch entirely (a Finder copy is a reference to a file the user already filed — a different gesture, and this one declines rather than guessing); raw image data is the fallback. **Target**: the board window pastes onto the **anchor card** (the existing paste-target grammar — the last selected card in flatten order), so a lane, an empty and a trash selection all grey the row out rather than the app guessing a card; a card window pastes onto **its own card**, and a focused text field still wins ⌘V natively, as everywhere else. **Format**: a file-shaped flavor is kept byte for byte — PNG, JPEG, GIF, HEIC, WebP, extension its own — and everything else (TIFF, BMP: interchange encodings, not files people want in a folder) is re-encoded to PNG; PNG is preferred when several flavors are offered, which is the screenshot's case. **Name**: Finder's own — `Pasted Image.png`, then `Pasted Image 2.png` — minted by the existing import path's own collision ladder. It **is** that import path (the one Finder file drops and ⇧⌘A take), so the bracket, the read-only lock, the banners, the echo receipts and "no undo step for an attachment arrival" all hold unchanged, and the arrival announces exactly as a drop's does. A pasteboard that declares a flavor it cannot back up writes nothing at all. **Edit ▸ Paste as Board Background** is the same payload's other destination and a named row rather than a ⌘V branch — a backdrop has no selection to target (03-board-ui.md § Styling ▸ Capabilities).
 - **Lane paste** lands after the anchor lane — the selected lane, or the selected card's lane (several selected: the last, per the shared anchor rule); nothing selected = the board's right end. Semantics mirror the drag pair above exactly: a pasted *copy* takes fresh GUIDs throughout; a cut-paste is the ⌘-drag move — the folder moves whole (nothing lane-nested to strip or carry — the trash is board-level, resettled 2026-07-28). **Pasting into the source board is supported and is the within-board lane duplicate** (settled): fresh GUIDs apply as anywhere else, no menu-validation special case — the drag path deliberately lacks this operation (⌥ ignored on lane drags, above), the clipboard is its one home.
 
 ## Keyboard