迁移A04为自适应文档流

tests/a04-registration-runtime-smoke.js

@@ -83,6 +83,7 @@ const run = async () => {
         const header = document.querySelector('.auth-shell__header')
         const headerImage = document.querySelector('.auth-shell__header-image img')
         const paper = document.querySelector('.auth-shell__paper')
+        const title = document.querySelector('.page-title')
         const loginEntry = document.querySelector('.login-entry')
         return {
           width: document.documentElement.scrollWidth,
@@ -93,6 +94,7 @@ const run = async () => {
           headerNaturalWidth: headerImage?.naturalWidth,
           headerNaturalHeight: headerImage?.naturalHeight,
           paperTop: paper?.getBoundingClientRect().top,
+          titleCenter: title ? title.getBoundingClientRect().left + title.getBoundingClientRect().width / 2 : null,
           loginEntryBottom: loginEntry?.getBoundingClientRect().bottom + window.scrollY
         }
       })()`)
@@ -100,6 +102,7 @@ const run = async () => {
       assert.deepStrictEqual([metrics.headerNaturalWidth, metrics.headerNaturalHeight], [824, 340], `A04 header asset changed at ${size.width}x${size.height}`)
       assert(Math.abs(metrics.headerImageHeight / metrics.headerImageWidth - 340 / 824) < 0.01, `A04 header is distorted at ${size.width}x${size.height}`)
       assert(metrics.paperTop >= metrics.headerBottom - 1, `A04 paper overlaps its header at ${size.width}x${size.height}`)
+      assert(Math.abs(metrics.titleCenter - size.width / 2) <= 1, `A04 title is not centered at ${size.width}x${size.height}: ${metrics.titleCenter}`)
       assert(metrics.loginEntryBottom <= metrics.documentScrollHeight + 1, `A04 last action is unreachable at ${size.width}x${size.height}`)
     }