Logo — three separate faults, all of which had to be fixed for the
letterhead logo to print at all:
1. receipt.html hardcoded '/wfdash-logo.png' for the sale slip, so it
printed the app's bundled mark (the solid black W block) and never
looked at the letterhead at all.
2. The paths that DID use the letterhead (printTest, cashup) passed
PocketBase's fully-qualified cross-origin URL into imageToRaster(),
which draws to a <canvas> — getImageData() taints and throws on a
cross-origin image, so the .catch(() => null) silently dropped the
logo. pos-letterhead-service now returns a same-origin
/api/v1/files/... URL (per AGENTS.md's file-URL rule).
3. letterhead_settings wasn't whitelisted in that file proxy, so the
same-origin URL would have 403'd.
Verified against the live WESTSCOTT letterhead: its SVG rasterizes to
384x137 at ~15% ink coverage (line art), no tainted canvas.
Also fixes the company name never printing: every builder read
`letterhead.name`, but the POS letterhead record exposes
`display_name` — so the name line silently rendered empty on every
slip, on screen and on paper.
Delivery note now matches the sale slip, per request: gains the logo
and business_info blocks and the same 2x-size title, instead of being
a stripped-down variant. This also reconciles the transport
divergence flagged earlier (Bluetooth baked business info into its
header; the network builder omitted it entirely) — it is now one
reorderable business_info block on both.
resolveBlocks() now slots a newly-shipped block in at its intended
position rather than appending it to the end. Without this, any
letterhead with an already-saved layout would have printed the new
logo/business_info blocks BELOW the signature line.
Also fixes a logo-ordering bug this surfaced: slip-layout.js's sale
and cashup defaults put header_title before logo, which (once a real
logo renders instead of the always-empty placeholder used in earlier
regression tests) reversed the original image-then-title print order.
Reordered both to logo-first and added the missing logo block to
cashup's default catalog, since cashup's original code already
attempted (brokenly) to print one.
