fix: check NaN before page subtraction for clarity

Agent-Logs-Url: https://github.com/bertyuan/next-blog/sessions/f86da32b-3af7-4393-8077-ce3435137221

Co-authored-by: bertyuan <189593334+bertyuan@users.noreply.github.com>

2 files changed, 12 insertions, 8 deletions

diff --git a/src/app/(main)/(home)/posts/page.tsx b/src/app/(main)/(home)/posts/page.tsx
index daced35..376f5c1 100644
--- a/src/app/(main)/(home)/posts/page.tsx
+++ b/src/app/(main)/(home)/posts/page.tsx
@@ -55,16 +55,18 @@ export default async function Page(props: {
 }) {
   const searchParams = await props.searchParams;
 
-  const pageIndex = searchParams.page
+  const rawPage = searchParams.page
     ? Number.parseInt(
         Array.isArray(searchParams.page)
           ? (searchParams.page[0] ?? '')
           : searchParams.page,
         10,
-      ) - 1
-    : 0;
+      )
+    : 1;
+
+  if (Number.isNaN(rawPage)) notFound();
 
-  if (Number.isNaN(pageIndex)) notFound();
+  const pageIndex = rawPage - 1;
 
   // 获取文章（带分页）
   const { posts, totalDocs, totalPages } = await getPublishedPosts({
diff --git a/src/app/(main)/(home)/tags/[...slug]/page.tsx b/src/app/(main)/(home)/tags/[...slug]/page.tsx
index 45fa52f..30c6464 100644
--- a/src/app/(main)/(home)/tags/[...slug]/page.tsx
+++ b/src/app/(main)/(home)/tags/[...slug]/page.tsx
@@ -89,16 +89,18 @@ export default async function Page(props: {
   const tag = params.slug[0];
   if (!tag) return notFound();
 
-  const pageIndex = searchParams.page
+  const rawPage = searchParams.page
     ? Number.parseInt(
         Array.isArray(searchParams.page)
           ? (searchParams.page[0] ?? '')
           : searchParams.page,
         10,
-      ) - 1
-    : 0;
+      )
+    : 1;
+
+  if (Number.isNaN(rawPage)) notFound();
 
-  if (Number.isNaN(pageIndex)) notFound();
+  const pageIndex = rawPage - 1;
 
   const { posts, totalDocs, totalPages } = await getPostsByTag(tag, {
     limit: postsPerPage,