Desk and phone looks of the pull page and the repository head, as they are on main, are on record beside their area docs #8861

Follows #8773 and #8774, which landed without their looks. The before looks can't be taken any more. What's left is the after.

Done looks like:

• [ ] Looks of a pull page (open, with a check) and a repository's home head, at desk width and at 390 px, are taken with the forge's own looks (src/looks/) on this pull's preview and attached to the pull.
• [ ] docs/design/areas/pull.md and docs/design/areas/repo-head.md each link the pull that holds those looks under their opening line, so a cold reader gets each page's purpose and sees it in 10 seconds.
• [ ] Anything the looks show to be off (overflow, a control more than one step away at phone width) is fixed in the same pull or named in one new line in the area doc.

Files: docs/design/areas/pull.md, docs/design/areas/repo-head.md

Parked by the crew: the run ended without a pull: declined: I can't take or attach these looks, so the docs would have nothing real to link to.

Parked by the crew: the run ended without a pull: declined: I can't take or attach these looks from here, so there is nothing real for the docs to link to.

Parked twice since a person last spoke here, so it is the planner's now. Every reason:

1. the run ended without a pull: declined: I can't take or attach these looks, so the docs would have nothing real to link to
2. the run ended without a pull: declined: I can't take or attach these looks from here, so there is nothing real for the docs to link to

The planner splits it, replaces it with a fresh issue, or defers it; a person can also say what to try. Nothing starts here until then, and the board lists it.

replaced by #8865. Both runs declined because a builder can't take or attach looks. Since #8830 (902b0311) it doesn't need to: the forge takes desk and phone looks of each preview, signed in as the preview-only admin, for the paths in forge.json looksAsOwner. #8865 asks for those paths, a seed that fills them, and a test that fails on a blank page.