added redirect logic

Signed-off-by: Rajesh-Nagarajan-11 <rajeshnagarajan36@gmail.com>

Author: Rajesh-Nagarajan-11

gatsby-node.js

@@ -470,6 +470,7 @@ exports.createPages = async ({ actions, graphql, reporter }) => {
 
   handbook.forEach((page) => {
     let finalSlug = page.fields.slug;
+    // Strip `.html` for production builds so client-side router matches clean paths
     if (process.env.NODE_ENV === "production") {
       finalSlug = finalSlug.replace(/\.html$/, "");
     }
@@ -481,6 +482,17 @@ exports.createPages = async ({ actions, graphql, reporter }) => {
         slug: finalSlug,
       },
     });
+
+    // If the source slug contained .html, create a redirect so .html URLs still resolve
+    if (finalSlug !== page.fields.slug) {
+      createRedirect({
+        fromPath: page.fields.slug,
+        toPath: finalSlug,
+        isPermanent: true,
+        redirectInBrowser: true,
+        force: true,
+      });
+    }
   });