feat: add env shortcode for conditional content rendering based on Hugo environment

apps/test/content/posts/codeblock-test.md

@@ -194,8 +194,6 @@ function isObjectLiteral(str) {
 
 ## Gist Embed
 
-```md
-{{</* gist Lruihao fb8b2d0353465c4d40bf74818db80710 */>}}
-```
-
-<!-- {{< gist Lruihao fb8b2d0353465c4d40bf74818db80710 >}} -->
+{{< env "production" >}}
+{{< gist Lruihao fb8b2d0353465c4d40bf74818db80710 >}}
+{{< /env >}}

layouts/_partials/init/index.html

@@ -1,4 +1,4 @@
-{{- hugo.Store.Set "version" "v0.4.0-alpha.3-20251222034819-3fa866fa" -}}
+{{- hugo.Store.Set "version" "v0.4.0-alpha.3-20251222065334-6cf32775" -}}
 {{- .Store.Set "this" dict -}}
 
 {{- partial "init/detection-env.html" . -}}

layouts/_shortcodes/env.html

@@ -0,0 +1,21 @@
+{{- /*
+  A shortcode to conditionally render content based on the current Hugo environment.
+  Hugo environments (development, production, etc.) usage reference:
+  - https://gohugo.io/functions/hugo/environment/
+  - https://gohugo.io/configuration/all/#environment
+
+  For example, to render content only in the "production" environment:
+  {{< env "production" >}}
+    This content is only visible in production.
+  {{< /env >}}
+*/ -}}
+
+{{- $env := .Get 0 -}}
+{{- if eq $env hugo.Environment -}}
+  {{- .Inner | .Page.RenderString -}}
+{{- else if hugo.IsServer -}}
+  <details>
+    <summary>[Hugo Server]: Click to expand <strong><code>{{ $env }}</code></strong> environment content.</summary>
+    <pre><code>{{- printf `%s` "\n" | trim .Inner -}}</code></pre>
+  </details>
+{{- end -}}