feat: show tag / cat count on post page

(resolve #1189)

Author: OverflowCat

src/layouts/Common.astro

@@ -5,6 +5,7 @@ import LicenceBox from "@/components/licences/LicenceBox.astro";
 import type { IconName } from "@/scripts/icons";
 import Icon from "@/components/Icon.astro";
 import { getEntry } from "astro:content";
+import { getCatsInfo, getTagsInfo } from "@/scripts/tags";
 export interface Props {
   layoutProps: {
     url?: string;
@@ -98,7 +99,7 @@ import { getCatSlug } from "@/scripts/tags";
         分类：
         {cats.map((cat) => (
           <a class="cat" href={`/categories/${getCatSlug(cat)}/`}>
-            {cat}
+            {cat} <sup>{getCatsInfo().get(cat)}</sup>
           </a>
         ))}
       </div>
@@ -112,7 +113,7 @@ import { getCatSlug } from "@/scripts/tags";
         标签：
         {tags.map((tag) => (
           <a class="tag" href={`/tags/${tag}/`}>
-            {tag}
+            {tag} <sup>{getTagsInfo().get(tag)}</sup>
           </a>
         ))}
       </div>

src/posts/_dip.typ

@@ -0,0 +1,14 @@
+#import "/src/docs/html-template.typ": *
+#template[
+    = 第 2 章
+    #include "/node_modules/buaa-digital-image-processing/chap02/main.typ"
+
+    = 第 3 章
+    #include "/node_modules/buaa-digital-image-processing/chap03/main.typ"
+
+    = 第 4 章
+    // #include "/node_modules/buaa-digital-image-processing/chap04/main.typ"
+
+    = 第 10 章
+    // #include "/node_modules/buaa-digital-image-processing/chap10/main.typ"
+]

src/posts/digital-image-processing.mdx

@@ -0,0 +1,15 @@
+---
+title: 数字图像处理
+date: 2025-06-26T20:16:23.340Z
+noscript: true
+licence: false
+layout: "@/layouts/Default.astro"
+tags: []
+categories:
+  - Typst
+draft: true
+---
+
+import Content from "./_dip.typ"
+
+<Content />

src/posts/npm-universe/index.mdx

@@ -11,7 +11,7 @@ tags:
   - Astro
   - meme
 categories:
-  - typst
+  - Typst
 ---
 
 众所周知，[Typst Universe](https://typst.app/universe/) 是 typst 生态中的三方包 registry。在 2025 年的年中，向大家介绍新一代的 typst 包管理和三方包仓库：NPM Universe。顾名思义，就是使用一个名叫「npm」的命令行工具的 Typst Universe 替代品。

src/scripts/tags.ts

@@ -1,8 +1,9 @@
 import { getBlogPosts } from "@/scripts/post";
 const posts = await getBlogPosts();
 
-export async function getTagsInfo() {
-	const tagsInfo = new Map<string, number>();
+const tagsInfo = new Map<string, number>();
+export function getTagsInfo() {
+	if (tagsInfo.size > 0) return tagsInfo;
 	posts.map((post) => {
 		if (!post.data.tags) return;
 		if (typeof post.data.tags === "string") {
@@ -15,8 +16,9 @@ export async function getTagsInfo() {
 	return tagsInfo;
 }
 
+const catsInfo = new Map<string, number>();
 export function getCatsInfo() {
-	const catsInfo = new Map<string, number>();
+	if (catsInfo.size > 0) return catsInfo;
 	posts.map((post) => {
 		if (!post.data.categories) return;
 		if (typeof post.data.categories === "string")