small: one name per thing in the account menu: SSH keys, access keys and linked sites read the same on the label, the page title, the empty line and the palette #10792

Intent: a person who taps a menu label meets the same words on the page it opens (docs/WRITING.md, principle 8). Replaces #10754 (the rename pull #10719 started), with nothing in front of it.

• [x] For each of: SSH keys, access tokens, origins, linked sites: pick one plain name; the menu label, the destination page's title and heading, its body and empty line ("No … yet"), the nav and the palette entry all use it.
• [x] A test per page asserts label and title match; no test expectation is changed to keep a mismatch green.
• [x] bun scripts/design-lint.ts passes.

Files: the settings menu and those four pages under src/web/pages, the palette entries, tests. Risks: keep routes and URLs unchanged; if the menu-and-palette jargon issue lands first, start from its labels. Suggested brief: scout.

Reviewed pull #10818 at its head: ticked For each of: SSH keys, access tokens, origins, linked sites: pick one plain name; the menu label, the destination page's title and heading, its body and empty line ("No … yet"), the nav and the palette entry all use it.; A test per page asserts label and title match; no test expectation is changed to keep a mismatch green.; bun scripts/design-lint.ts passes..