feat: implement dark mode infrastructure, optimize images, and add SEO structured data

package-lock.json

@@ -31,6 +31,7 @@
         "lucide-react": "^0.542.0",
         "next": "^15.5.7",
         "next-intl": "^4.7.0",
+        "next-themes": "^0.4.6",
         "node-cache": "^5.1.2",
         "node-fetch": "^2.7.0",
         "nodemailer": "^7.0.11",
@@ -14488,6 +14489,16 @@
         }
       }
     },
+    "node_modules/next-themes": {
+      "version": "0.4.6",
+      "resolved": "https://registry.npmjs.org/next-themes/-/next-themes-0.4.6.tgz",
+      "integrity": "sha512-pZvgD5L0IEvX5/9GWyHMf3m8BKiVQwsCMHfoFosXtXBMnaS0ZnIJ9ST4b4NqLVKDEm8QBxoNNGNaBv2JNF6XNA==",
+      "license": "MIT",
+      "peerDependencies": {
+        "react": "^16.8 || ^17 || ^18 || ^19 || ^19.0.0-rc",
+        "react-dom": "^16.8 || ^17 || ^18 || ^19 || ^19.0.0-rc"
+      }
+    },
     "node_modules/next/node_modules/postcss": {
       "version": "8.4.31",
       "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.4.31.tgz",