L03-02 — Separate Production Preview from fast canvas #28

Outcome

Display render fidelity and origin on ordinary canvas and authoritative Production Preview.

Parent and boundary

Parent: #4. Owner: LoopEditor. This issue owns one bounded slice of Quick Workspace; consume accepted upstream contracts and keep PDF/verdict/publication authority with Core.

Acceptance

• Overprint-sensitive content explicitly switches to authoritative preview before print claim.
• Failure case: Approximate canvas pixels cannot be cited as proof of print-safe output.

Required proof

Visual fixtures for overprint, transparency, and fidelity state. Record the exact source SHA, test command or hosted run, fixture/artifact identity, and any skipped or unavailable lane. Run the repository's mapped proof and check-change gate for a PR.

Handoff

Record changed files, observed result, remaining risk, and a 1–3 sentence anti-slop review. Completion means acceptance evidence, not merely a merged implementation.

Sources

Approved master roadmap · Legacy/research input (legacy #586).