The repository head shows less at rest, and every control it had stays one step away #8774

Follows #8719. Pull #8722 (7802eb22) redid the issue list. This issue does the repository head (the band on every repository page) the same way.

Done looks like:

• [x] The head follows the rules in #8719's body (chrome recedes, whitespace before borders, 4–5 properties a row, status as a glyph with its word on hover, one primary action in a fixed place, rare actions in an overflow and the palette, hierarchy by size and weight, a few colour tokens), tuned hard toward Linear's calm as the owner asked, in our own identity: one primary action, the rest in an overflow and the palette.
• [x] A test lists every link and action the head offered before and finds each still reachable, and each in the command palette (Cmd-K).
• [x] The repository page's HTML is smaller, with byte counts on the pull, and its byte budget is tightened in a test (#8016).
• [ ] Desk and phone screenshots, before and after, are attached to the pull as looks. docs/design/areas/repo-head.md says in one line what the head is for.
• [x] bun scripts/design-lint.ts is clean.

Files: src/web/chrome.ts, src/web/pages/repo.ts, src/web/style/components.ts, docs/design/areas/repo-head.md, test/repo-head-quiet.test.ts (new) Risks: the head is on every repository page, so check the pull, issues and files pages still render it whole. Keep #6503's §5 bar if it lands first.

Reviewed pull #8802 at its head: ticked The head follows the rules in #8719's body (chrome recedes, whitespace before borders, 4–5 properties a row, status as a glyph with its word on hover, one primary action in a fixed place, rare actions in an overflow and the palette, hierarchy by size and weight, a few colour tokens), tuned hard toward Linear's calm as the owner asked, in our own identity: one primary action, the rest in an overflow and the palette.; A test lists every link and action the head offered before and finds each still reachable, and each in the command palette (Cmd-K).; The repository page's HTML is smaller, with byte counts on the pull, and its byte budget is tightened in a test (#8016).; bun scripts/design-lint.ts is clean.. left open: Desk and phone screenshots, before and after, are attached to the pull as looks. docs/design/areas/repo-head.md says in one line what the head is for. — No screenshots are attached; the sandbox had no browser. The one-line purpose in repo-head.md is present..

Left open after pull #8802 landed: 1 unticked item remains (Desk and phone screenshots, before and after, are attached to the pull as looks. docs/design/areas/repo-head.md says in one line what the head is for.). The planner files each as its own issue and closes this one; a person may close it, tick what is done, or say what is left. Until then the crew does not pick it again.

Dropping the open box. docs/design/areas/repo-head.md already opens with what the head is for ("names the repository and what you can do with it"). A before look can't be taken now that the change is on main, so no builder run can tick that half.

The doc line already exists on main. The looks part, now only the after looks, is #8861, which covers both this page and its sibling.