From f904d2c666f1a3f2679ac2e5493ea2a15b7cfa1c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Sel=C3=A7uk=20=C3=96zkurt?= <seninmailin@example.com>
Date: Wed, 15 Jul 2026 17:39:26 +0300
Subject: [PATCH] fix: remove duplicate XML declaration in sitemap

---
 public/sitemap.xml           | 65 ++++++++++++++++++------------------
 routes.js                    | 52 ++++++++++++++---------------
 scripts/sitemap-generator.js |  2 +-
 tsconfig.json                |  2 +-
 4 files changed, 60 insertions(+), 61 deletions(-)

diff --git a/public/sitemap.xml b/public/sitemap.xml
index 082efe5..fd65eef 100644
--- a/public/sitemap.xml
+++ b/public/sitemap.xml
@@ -1,195 +1,194 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<?xml version="1.0" encoding="UTF-8"?>
 <urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
   <url>
     <loc>https://physicshub.github.io/</loc>
-    <lastmod>2026-07-04T00:00:00.000Z</lastmod>
+    <lastmod>2026-07-15T00:00:00.000Z</lastmod>
     <changefreq>weekly</changefreq>
     <priority>1.0</priority>
   </url>
   <url>
     <loc>https://physicshub.github.io/contribute</loc>
-    <lastmod>2026-07-04T00:00:00.000Z</lastmod>
+    <lastmod>2026-07-15T00:00:00.000Z</lastmod>
     <changefreq>monthly</changefreq>
     <priority>0.8</priority>
   </url>
   <url>
     <loc>https://physicshub.github.io/simulations</loc>
-    <lastmod>2026-07-04T00:00:00.000Z</lastmod>
+    <lastmod>2026-07-15T00:00:00.000Z</lastmod>
     <changefreq>weekly</changefreq>
     <priority>0.9</priority>
   </url>
   <url>
     <loc>https://physicshub.github.io/about</loc>
-    <lastmod>2026-07-04T00:00:00.000Z</lastmod>
+    <lastmod>2026-07-15T00:00:00.000Z</lastmod>
     <changefreq>monthly</changefreq>
     <priority>0.7</priority>
   </url>
   <url>
     <loc>https://physicshub.github.io/blog</loc>
-    <lastmod>2026-07-04T00:00:00.000Z</lastmod>
+    <lastmod>2026-07-15T00:00:00.000Z</lastmod>
     <changefreq>weekly</changefreq>
     <priority>0.9</priority>
   </url>
   <url>
     <loc>https://physicshub.github.io/blog/create</loc>
-    <lastmod>2026-07-04T00:00:00.000Z</lastmod>
+    <lastmod>2026-07-15T00:00:00.000Z</lastmod>
     <changefreq>monthly</changefreq>
     <priority>0.7</priority>
   </url>
   <url>
     <loc>https://physicshub.github.io/blog/what-is-physics</loc>
-    <lastmod>2026-07-04T00:00:00.000Z</lastmod>
+    <lastmod>2026-07-15T00:00:00.000Z</lastmod>
     <changefreq>monthly</changefreq>
     <priority>0.8</priority>
   </url>
   <url>
     <loc>https://physicshub.github.io/blog/class-12-physics-complete-guide</loc>
-    <lastmod>2026-07-04T00:00:00.000Z</lastmod>
+    <lastmod>2026-07-15T00:00:00.000Z</lastmod>
     <changefreq>monthly</changefreq>
     <priority>0.8</priority>
   </url>
   <url>
     <loc>https://physicshub.github.io/blog/physics-bouncing-ball-comprehensive-educational-guide</loc>
-    <lastmod>2026-07-04T00:00:00.000Z</lastmod>
+    <lastmod>2026-07-15T00:00:00.000Z</lastmod>
     <changefreq>monthly</changefreq>
     <priority>0.8</priority>
   </url>
   <url>
     <loc>https://physicshub.github.io/blog/comprehensive-guide-to-vector-operations</loc>
-    <lastmod>2026-07-04T00:00:00.000Z</lastmod>
+    <lastmod>2026-07-15T00:00:00.000Z</lastmod>
     <changefreq>monthly</changefreq>
     <priority>0.8</priority>
   </url>
   <url>
     <loc>https://physicshub.github.io/blog/ball-uniformly-accelerated-motion</loc>
-    <lastmod>2026-07-04T00:00:00.000Z</lastmod>
+    <lastmod>2026-07-15T00:00:00.000Z</lastmod>
     <changefreq>monthly</changefreq>
     <priority>0.8</priority>
   </url>
   <url>
     <loc>https://physicshub.github.io/blog/ball-free-fall-comprehensive-guide</loc>
-    <lastmod>2026-07-04T00:00:00.000Z</lastmod>
+    <lastmod>2026-07-15T00:00:00.000Z</lastmod>
     <changefreq>monthly</changefreq>
     <priority>0.8</priority>
   </url>
   <url>
     <loc>https://physicshub.github.io/blog/spring-connection</loc>
-    <lastmod>2026-07-04T00:00:00.000Z</lastmod>
+    <lastmod>2026-07-15T00:00:00.000Z</lastmod>
     <changefreq>monthly</changefreq>
     <priority>0.8</priority>
   </url>
   <url>
     <loc>https://physicshub.github.io/blog/physics-of-pendulum-explained</loc>
-    <lastmod>2026-07-04T00:00:00.000Z</lastmod>
+    <lastmod>2026-07-15T00:00:00.000Z</lastmod>
     <changefreq>monthly</changefreq>
     <priority>0.8</priority>
   </url>
   <url>
     <loc>https://physicshub.github.io/blog/projectile-parabolic-motion</loc>
-    <lastmod>2026-07-04T00:00:00.000Z</lastmod>
+    <lastmod>2026-07-15T00:00:00.000Z</lastmod>
     <changefreq>monthly</changefreq>
     <priority>0.8</priority>
   </url>
   <url>
     <loc>https://physicshub.github.io/blog/physics-behind-three-body-problem</loc>
-    <lastmod>2026-07-04T00:00:00.000Z</lastmod>
+    <lastmod>2026-07-15T00:00:00.000Z</lastmod>
     <changefreq>monthly</changefreq>
     <priority>0.8</priority>
   </url>
   <url>
     <loc>https://physicshub.github.io/blog/pi-from-block-collisions-explained</loc>
-    <lastmod>2026-07-04T00:00:00.000Z</lastmod>
+    <lastmod>2026-07-15T00:00:00.000Z</lastmod>
     <changefreq>monthly</changefreq>
     <priority>0.8</priority>
   </url>
   <url>
     <loc>https://physicshub.github.io/simulations/BouncingBall</loc>
-    <lastmod>2026-07-04T00:00:00.000Z</lastmod>
+    <lastmod>2026-07-15T00:00:00.000Z</lastmod>
     <changefreq>weekly</changefreq>
     <priority>0.7</priority>
   </url>
   <url>
     <loc>https://physicshub.github.io/simulations/VectorsOperations</loc>
-    <lastmod>2026-07-04T00:00:00.000Z</lastmod>
+    <lastmod>2026-07-15T00:00:00.000Z</lastmod>
     <changefreq>weekly</changefreq>
     <priority>0.7</priority>
   </url>
   <url>
     <loc>https://physicshub.github.io/simulations/BallAcceleration</loc>
-    <lastmod>2026-07-04T00:00:00.000Z</lastmod>
+    <lastmod>2026-07-15T00:00:00.000Z</lastmod>
     <changefreq>weekly</changefreq>
     <priority>0.7</priority>
   </url>
   <url>
     <loc>https://physicshub.github.io/simulations/BallGravity</loc>
-    <lastmod>2026-07-04T00:00:00.000Z</lastmod>
+    <lastmod>2026-07-15T00:00:00.000Z</lastmod>
     <changefreq>weekly</changefreq>
     <priority>0.7</priority>
   </url>
   <url>
     <loc>https://physicshub.github.io/simulations/SpringConnection</loc>
-    <lastmod>2026-07-04T00:00:00.000Z</lastmod>
+    <lastmod>2026-07-15T00:00:00.000Z</lastmod>
     <changefreq>weekly</changefreq>
     <priority>0.7</priority>
   </url>
   <url>
     <loc>https://physicshub.github.io/simulations/SimplePendulum</loc>
-    <lastmod>2026-07-04T00:00:00.000Z</lastmod>
+    <lastmod>2026-07-15T00:00:00.000Z</lastmod>
     <changefreq>weekly</changefreq>
     <priority>0.7</priority>
   </url>
   <url>
     <loc>https://physicshub.github.io/simulations/ParabolicMotion</loc>
-    <lastmod>2026-07-04T00:00:00.000Z</lastmod>
+    <lastmod>2026-07-15T00:00:00.000Z</lastmod>
     <changefreq>weekly</changefreq>
     <priority>0.7</priority>
   </url>
   <url>
     <loc>https://physicshub.github.io/simulations/InclinedPlane</loc>
-    <lastmod>2026-07-04T00:00:00.000Z</lastmod>
+    <lastmod>2026-07-15T00:00:00.000Z</lastmod>
     <changefreq>weekly</changefreq>
     <priority>0.7</priority>
   </url>
   <url>
     <loc>https://physicshub.github.io/simulations/CircularMotion</loc>
-    <lastmod>2026-07-04T00:00:00.000Z</lastmod>
+    <lastmod>2026-07-15T00:00:00.000Z</lastmod>
     <changefreq>weekly</changefreq>
     <priority>0.7</priority>
   </url>
   <url>
     <loc>https://physicshub.github.io/simulations/ThreeBody</loc>
-    <lastmod>2026-07-04T00:00:00.000Z</lastmod>
+    <lastmod>2026-07-15T00:00:00.000Z</lastmod>
     <changefreq>weekly</changefreq>
     <priority>0.7</priority>
   </url>
   <url>
     <loc>https://physicshub.github.io/simulations/HorizontalSpring</loc>
-    <lastmod>2026-07-04T00:00:00.000Z</lastmod>
+    <lastmod>2026-07-15T00:00:00.000Z</lastmod>
     <changefreq>weekly</changefreq>
     <priority>0.7</priority>
   </url>
   <url>
     <loc>https://physicshub.github.io/simulations/DoublePendulum</loc>
-    <lastmod>2026-07-04T00:00:00.000Z</lastmod>
+    <lastmod>2026-07-15T00:00:00.000Z</lastmod>
     <changefreq>weekly</changefreq>
     <priority>0.7</priority>
   </url>
   <url>
     <loc>https://physicshub.github.io/simulations/CollisionSimulation</loc>
-    <lastmod>2026-07-04T00:00:00.000Z</lastmod>
+    <lastmod>2026-07-15T00:00:00.000Z</lastmod>
     <changefreq>weekly</changefreq>
     <priority>0.7</priority>
   </url>
   <url>
     <loc>https://physicshub.github.io/simulations/test</loc>
-    <lastmod>2026-07-04T00:00:00.000Z</lastmod>
+    <lastmod>2026-07-15T00:00:00.000Z</lastmod>
     <changefreq>weekly</changefreq>
     <priority>0.7</priority>
   </url>
   <url>
     <loc>https://physicshub.github.io/simulations/PiCollisions</loc>
-    <lastmod>2026-07-04T00:00:00.000Z</lastmod>
+    <lastmod>2026-07-15T00:00:00.000Z</lastmod>
     <changefreq>weekly</changefreq>
     <priority>0.7</priority>
   </url>
diff --git a/routes.js b/routes.js
index 30222b2..8a36f0a 100644
--- a/routes.js
+++ b/routes.js
@@ -39,156 +39,156 @@ export const routes = [
     path: "/blog/what-is-physics",
     changefreq: "monthly",
     priority: 0.8,
-    lastmod: "2026-07-04",
+    lastmod: "2026-07-15",
   },
   {
     path: "/blog/class-12-physics-complete-guide",
     changefreq: "monthly",
     priority: 0.8,
-    lastmod: "2026-07-04",
+    lastmod: "2026-07-15",
   },
   {
     path: "/blog/physics-bouncing-ball-comprehensive-educational-guide",
     changefreq: "monthly",
     priority: 0.8,
-    lastmod: "2026-07-04",
+    lastmod: "2026-07-15",
   },
   {
     path: "/blog/comprehensive-guide-to-vector-operations",
     changefreq: "monthly",
     priority: 0.8,
-    lastmod: "2026-07-04",
+    lastmod: "2026-07-15",
   },
   {
     path: "/blog/ball-uniformly-accelerated-motion",
     changefreq: "monthly",
     priority: 0.8,
-    lastmod: "2026-07-04",
+    lastmod: "2026-07-15",
   },
   {
     path: "/blog/ball-free-fall-comprehensive-guide",
     changefreq: "monthly",
     priority: 0.8,
-    lastmod: "2026-07-04",
+    lastmod: "2026-07-15",
   },
   {
     path: "/blog/spring-connection",
     changefreq: "monthly",
     priority: 0.8,
-    lastmod: "2026-07-04",
+    lastmod: "2026-07-15",
   },
   {
     path: "/blog/physics-of-pendulum-explained",
     changefreq: "monthly",
     priority: 0.8,
-    lastmod: "2026-07-04",
+    lastmod: "2026-07-15",
   },
   {
     path: "/blog/projectile-parabolic-motion",
     changefreq: "monthly",
     priority: 0.8,
-    lastmod: "2026-07-04",
+    lastmod: "2026-07-15",
   },
   {
     path: "/blog/physics-behind-three-body-problem",
     changefreq: "monthly",
     priority: 0.8,
-    lastmod: "2026-07-04",
+    lastmod: "2026-07-15",
   },
   {
     path: "/blog/pi-from-block-collisions-explained",
     changefreq: "monthly",
     priority: 0.8,
-    lastmod: "2026-07-04",
+    lastmod: "2026-07-15",
   },
   {
     path: "/simulations/BouncingBall",
     changefreq: "weekly",
     priority: 0.7,
-    lastmod: "2026-07-04",
+    lastmod: "2026-07-15",
   },
   {
     path: "/simulations/VectorsOperations",
     changefreq: "weekly",
     priority: 0.7,
-    lastmod: "2026-07-04",
+    lastmod: "2026-07-15",
   },
   {
     path: "/simulations/BallAcceleration",
     changefreq: "weekly",
     priority: 0.7,
-    lastmod: "2026-07-04",
+    lastmod: "2026-07-15",
   },
   {
     path: "/simulations/BallGravity",
     changefreq: "weekly",
     priority: 0.7,
-    lastmod: "2026-07-04",
+    lastmod: "2026-07-15",
   },
   {
     path: "/simulations/SpringConnection",
     changefreq: "weekly",
     priority: 0.7,
-    lastmod: "2026-07-04",
+    lastmod: "2026-07-15",
   },
   {
     path: "/simulations/SimplePendulum",
     changefreq: "weekly",
     priority: 0.7,
-    lastmod: "2026-07-04",
+    lastmod: "2026-07-15",
   },
   {
     path: "/simulations/ParabolicMotion",
     changefreq: "weekly",
     priority: 0.7,
-    lastmod: "2026-07-04",
+    lastmod: "2026-07-15",
   },
   {
     path: "/simulations/InclinedPlane",
     changefreq: "weekly",
     priority: 0.7,
-    lastmod: "2026-07-04",
+    lastmod: "2026-07-15",
   },
   {
     path: "/simulations/CircularMotion",
     changefreq: "weekly",
     priority: 0.7,
-    lastmod: "2026-07-04",
+    lastmod: "2026-07-15",
   },
   {
     path: "/simulations/ThreeBody",
     changefreq: "weekly",
     priority: 0.7,
-    lastmod: "2026-07-04",
+    lastmod: "2026-07-15",
   },
   {
     path: "/simulations/HorizontalSpring",
     changefreq: "weekly",
     priority: 0.7,
-    lastmod: "2026-07-04",
+    lastmod: "2026-07-15",
   },
   {
     path: "/simulations/DoublePendulum",
     changefreq: "weekly",
     priority: 0.7,
-    lastmod: "2026-07-04",
+    lastmod: "2026-07-15",
   },
   {
     path: "/simulations/CollisionSimulation",
     changefreq: "weekly",
     priority: 0.7,
-    lastmod: "2026-07-04",
+    lastmod: "2026-07-15",
   },
   {
     path: "/simulations/test",
     changefreq: "weekly",
     priority: 0.7,
-    lastmod: "2026-07-04",
+    lastmod: "2026-07-15",
   },
   {
     path: "/simulations/PiCollisions",
     changefreq: "weekly",
     priority: 0.7,
-    lastmod: "2026-07-04",
+    lastmod: "2026-07-15",
   },
 ];
diff --git a/scripts/sitemap-generator.js b/scripts/sitemap-generator.js
index 8ae7762..ce435cc 100644
--- a/scripts/sitemap-generator.js
+++ b/scripts/sitemap-generator.js
@@ -81,7 +81,7 @@ async function generateSitemap() {
     lineSeparator: "\n",
   });
 
-  const xmlOutput = `<?xml version="1.0" encoding="UTF-8"?>\n${formatted}`;
+  const xmlOutput = formatted;
 
   // Ensure public directory exists
   const publicDir = join(__dirname, "../public");
diff --git a/tsconfig.json b/tsconfig.json
index 012ebf4..1045bf8 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -11,7 +11,7 @@
     "moduleResolution": "bundler",
     "resolveJsonModule": true,
     "isolatedModules": true,
-    "jsx": "react-jsx",
+    "jsx": "preserve",
     "incremental": true,
     "allowImportingTsExtensions": true,
     "plugins": [