Render Customer.io messages in the Desktop launcher

[benceruleanlu]

Behavior

Connect the launcher preload to the window coordinator and allow the pinned Customer.io/Gist network and frame hosts in the panel CSP. Eligible signed-in users can receive messages targeted to desktop/launcher, while local ComfyUI uses desktop/comfyui. An online event repeats the main-process handshake so an unavailable identity/SDK can retry. No inline-script or general CSP relaxation is added.

Launcher identity requires Cloud #9467 and #9468; old OAuth grants require fresh sign-in to acquire proven Firebase provenance. Documentation covers page targeting, eligibility, identity dependencies, and release verification.

Validation

Both real-SDK Electron fixtures passed: local ComfyUI and the launcher under its production CSP at a file URL. They cover display, opened metrics, dismissal, account changes, held-request revocation, private URL/query/referrer isolation, preserved host storage and continued interaction.

The CSP unit test retains an exact three-origin frame allowlist covering Typeform and the two message hosts; its updated expectation passed with all 19 CSP tests.

Required pre-commit typechecks, lint, and formatting passed. Native multi-view handoff, remaining CI gates, and packaged/live campaign verification are tracked separately.

Change breakdown

Changed lines = additions + deletions. No merge-only changes.

Category	Files	Added	Deleted	Share of changed lines
Documentation	1	48	18	44.3%
Test code	2	56	20	51.0%
Product code	3	5	2	4.7%
Total	6	109	40	100%

Documentation paths

• docs/customerio-messaging.md

Test code paths

• e2e/customerio.test.ts
• src/renderer/csp.test.ts

Product code paths

• src/preload/customerIoPreload.ts
• src/preload/index.ts
• src/renderer/panel.html

No generated or vendored files changed.

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