fix(scripts): read a skins PR in both skin directory layouts

Skin contributions moved to the dsh-skins repository, where a skin lives at
`skins/<id>/`, but `pr-review.mjs` still matched only the pre-split
`packages/skins/skin-center/skins/<id>/`. `--repo` can point at either
repository, so the change detection and the preview check now accept both
layouts; a dsh-skins PR gets the copyright and preview reminders again.

Verified: pr-review.test.mjs covers the satellite layout for both checks.

scripts/pr-review.mjs

@@ -306,14 +306,18 @@ export function checkLockfile(changes) {
   }))
 }
 
-/** 皮肤变更识别：返回 { isSkin, skinIds }。仅源码类变更触发（README/preview/文档不算）。
-    v2 布局（issue #506）：皮肤事实源是 skin-center 包内的资产目录。 */
+/** 皮肤目录前缀：dsh-skins 卫星仓是 skins/<id>/，本仓拆分前是
+    packages/skins/skin-center/skins/<id>/；--repo 可指向两者，故两种布局都认。 */
+const SKIN_DIR_PREFIXES = ['skins/', 'packages/skins/skin-center/skins/']
+const SKIN_DIR_RE = new RegExp(`^(?:${SKIN_DIR_PREFIXES.join('|')})([^/]+)/`)
+
+/** 皮肤变更识别：返回 { isSkin, skinIds }。仅源码类变更触发（README/preview/文档不算）。 */
 export function checkSkinChanges(changes) {
   const ids = new Set()
   const SKIP_RE = /(README(\.zh)?\.md|README\.i18n\.yaml|preview\/|^docs\/)/i
   for (const c of changes) {
     if (SKIP_RE.test(c.path)) continue
-    const m = c.path.match(/^packages\/skins\/skin-center\/skins\/([^/]+)\//)
+    const m = c.path.match(SKIN_DIR_RE)
     if (m) ids.add(m[1])
   }
   return { isSkin: ids.size > 0, skinIds: [...ids] }
@@ -337,11 +341,11 @@ export function checkSkinPreviews(changes, skinIds) {
   const findings = []
   for (const id of skinIds) {
     const isNew = changes.some((c) => c.status === `A` &&
-      c.path.startsWith(`packages/skins/skin-center/skins/` + id + `/`))
+      SKIN_DIR_PREFIXES.some((prefix) => c.path.startsWith(prefix + id + `/`)))
     if (!isNew) continue
     for (const mode of [`light`, `dark`]) {
       const hasPreview = changes.some((c) =>
-        c.path === `packages/skins/skin-center/skins/` + id + `/preview/` + mode + `.jpg`)
+        SKIN_DIR_PREFIXES.some((prefix) => c.path === prefix + id + `/preview/` + mode + `.jpg`))
       if (!hasPreview) {
         findings.push({ severity: `warn`, rule: `preview`, message: `新皮肤 ` + id + ` 未提供 ` + mode + ` 预览图：请运行 node scripts/capture-previews ` + id + ` 并提交 preview/` + mode + `.jpg` })
       }

scripts/pr-review.test.mjs

@@ -357,7 +357,7 @@ test(`提交信息检查`, () => {
 
 // ---------------------------------------------------------------- 皮肤识别与版权
 
-test(`皮肤变更识别：源码类命中，README 与 skin-center 排除`, () => {
+test(`皮肤变更识别：源码类命中，README 与 skin-center 排除，卫星仓 skins/<id>/ 同样命中`, () => {
   const f1 = checkSkinChanges([
     { status: `A`, path: `packages/skins/skin-center/skins/xp/skin.css` },
     { status: `A`, path: `packages/skins/skin-center/skins/xp/skin.json` },
@@ -371,6 +371,11 @@ test(`皮肤变更识别：源码类命中，README 与 skin-center 排除`, ()
   assert.deepEqual(f2, { isSkin: false, skinIds: [] })
   const f3 = checkSkinChanges([{ status: `M`, path: `packages/skins/skin-center/src/routes.ts` }])
   assert.equal(f3.isSkin, false)
+  const f4 = checkSkinChanges([
+    { status: `A`, path: `skins/xp/skin.css` },
+    { status: `M`, path: `skins/xp/preview/light.jpg` },
+  ])
+  assert.deepEqual(f4, { isSkin: true, skinIds: [`xp`] })
 })
 
 test(`版权提醒：外部贡献者皮肤 PR 未声明时 warn，已声明或仓库所有者豁免`, () => {
@@ -384,7 +389,7 @@ test(`版权提醒：外部贡献者皮肤 PR 未声明时 warn，已声明或
   assert.equal(checkCopyright(pr, false, `owner`).length, 0)
   assert.equal(checkCopyright(pr, true, `someone`).length, 0)
 })
-test(`市场预览：新皮肤缺 preview/{light,dark}.jpg 时警告，齐图或存量皮肤豁免`, () => {
+test(`市场预览：新皮肤缺 preview/{light,dark}.jpg 时警告，齐图、卫星仓布局或存量皮肤豁免`, () => {
   const base = [
     { status: `A`, path: `packages/skins/skin-center/skins/xp/skin.css` },
   ]
@@ -399,6 +404,14 @@ test(`市场预览：新皮肤缺 preview/{light,dark}.jpg 时警告，齐图或
   assert.equal(checkSkinPreviews(complete, [`xp`]).length, 0)
   const modified = [{ status: `M`, path: `packages/skins/skin-center/skins/xp/skin.css` }]
   assert.equal(checkSkinPreviews(modified, [`xp`]).length, 0)
+  const satellite = [{ status: `A`, path: `skins/xp/skin.css` }]
+  assert.equal(checkSkinPreviews(satellite, [`xp`]).length, 2)
+  const satelliteComplete = [
+    { status: `A`, path: `skins/xp/skin.css` },
+    { status: `A`, path: `skins/xp/preview/light.jpg` },
+    { status: `A`, path: `skins/xp/preview/dark.jpg` },
+  ]
+  assert.equal(checkSkinPreviews(satelliteComplete, [`xp`]).length, 0)
 })
 test(`视觉指标判定：过曝与对比度不足警告`, () => {
   const f1 = judgeVisualMetrics([