feat(docs): integrate Giscus comments and optimize layout for Furo theme

Update giscus mapping to 'title' to resolve 503 errors caused by URL path encoding and fix layout injection.

Author: OasisPioneer

source/_templates/page.html

@@ -10,7 +10,7 @@
         data-repo-id="R_kgDOQ0uvPA"
         data-category="Announcements"
         data-category-id="DIC_kwDOQ0uvPM4C0rb_"
-        data-mapping="pathname"
+        data-mapping="title"
         data-strict="0"
         data-reactions-enabled="1"
         data-emit-metadata="0"