docs(design): the full-site visual sweep findings — 50 pages reviewed, ranked #5535

The platform, seen completely for the first time: 558 screenshots, three vision reviewers, every finding ranked. Five criticals — the landing page itself worst of all (6–7 dead placeholder sections, fully inert dark mode, duplicated mobile hero), two surfaces that lie (DORA telling visitors we never deploy beside a 926-gate-run tile; bus-factor rendering zero-scan as a green all-clear), an illegible security banner, and a dark-inert off-brand login. Plus the counterweight: dark mode is genuinely complete on every other reviewed page and the core repo surfaces pass clean. Ends with the three-wave fix queue. Sweep-integrity note: our own rate limiter ate 43 captures and serves browsers raw JSON — both now on the list.

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