🚀 Chore(ci/cd): improve the joint construction and deployment of Demo and Test content

- Demo: https://demo.fixit.lruihao.cn/
- Test: https://demo.fixit.lruihao.cn/test/

test/content/posts/_index.md

@@ -0,0 +1,4 @@
+---
+title: All Tests
+titleIcon: fa-solid fa-flask
+---

test/content/posts/exact-color-match-test.md

@@ -3,6 +3,10 @@ title: Exact Color Match Test
 date: 2025-08-17T17:20:00+08:00
 collections:
   - Tests
+categories:
+  - Markdown
+tags:
+  - Color Preview
 ---
 
 ## 📝 Syntax

test/hugo.toml

@@ -4,7 +4,13 @@
 # -------------------------------------------------------------------------------------
 
 title = "Hugo FixIt TEST"
-baseURL = "http://example.org/"
+baseURL = "https://demo.fixit.lruihao.cn/test/"
+
+[permalinks]
+  [permalinks.page]
+    posts = "/units/:slugorcontentbasename"
+  [permalinks.section]
+    posts = "/units/"
 
 [markup]
   _merge = "shallow"