Each /review row shows the crew's recommendation with its reason and the evidence: diff stat, check, preview and look #4384

Part two of #3257.

Done:

• [ ] Each /review row also shows the crew's recommendation and its reason. For a pull request, the row also shows the diff stat, the check result, the preview link, and the before/after look when the pull has one. Nothing needs a click to see.
• [ ] Use standard nouns only (issue, pull request) and §5 components only. bun scripts/design-lint.ts passes.
• [ ] Server time stays under 200 ms with 50 seeded asks. A test asserts this from the Server-Timing header.
• [ ] test/review-page.test.ts checks the recommendation and evidence on the seeded pull. /asks stays as it is.

Files: src/web/studio/review_page.ts, test/review-page.test.ts.

Split into #4730 (the crew's advice on every row, README included) and #4731 (a pull's evidence on its row, waits for #4730). Pull #4495 went three review rounds on README text; each half now carries its own README line in what done looks like. #3258 now waits for #4731.