Update dependencies in package.json and improve redirect handling in …

package.json

@@ -15,58 +15,60 @@
     "unused-asset": "node scripts/unused-asset.js"
   },
   "dependencies": {
-    "@astrojs/mdx": "4.3.2",
+    "@astrojs/mdx": "4.3.13",
     "@astrojs/partytown": "^2.1.4",
-    "@astrojs/react": "4.3.0",
-    "@astrojs/rss": "^4.0.12",
-    "@fontsource-variable/open-sans": "^5.2.6",
-    "@fontsource/material-icons": "^5.2.5",
+    "@astrojs/react": "4.4.2",
+    "@astrojs/rss": "^4.0.15",
+    "@fontsource-variable/open-sans": "^5.2.7",
+    "@fontsource/material-icons": "^5.2.7",
     "@fortawesome/fontawesome-svg-core": "^6.7.2",
     "@fortawesome/free-solid-svg-icons": "^6.7.2",
-    "@fortawesome/react-fontawesome": "^0.2.3",
+    "@fortawesome/react-fontawesome": "^0.2.6",
     "@material-design-icons/svg": "^0.14.15",
     "@rollup/plugin-yaml": "4.1.2",
-    "astro": "5.12.7",
+    "astro": "5.17.2",
     "astro-seo": "0.8.4",
     "estree-util-visit": "2.0.0",
     "github-slugger": "^2.0.0",
-    "glob": "^11.0.3",
+    "glob": "^11.1.0",
     "gray-matter": "^4.0.3",
     "hast-util-is-element": "^3.0.0",
     "hast-util-select": "6.0.4",
     "hast-util-to-text": "^4.0.2",
     "mdast-util-mdx": "3.0.0",
-    "mdast-util-to-hast": "^13.2.0",
+    "mdast-util-to-hast": "^13.2.1",
     "micromark-core-commonmark": "2.0.3",
     "micromark-util-character": "2.1.1",
     "micromark-util-symbol": "2.0.1",
     "normalize.css": "^8.0.1",
-    "prettier": "^3.6.2",
+    "prettier": "^3.8.1",
     "rehype-external-links": "3.0.0",
     "rehype-minify-whitespace": "^6.0.2",
     "rehype-parse": "9.0.1",
     "rehype-raw": "7.0.0",
     "rehype-remove-comments": "^6.1.1",
     "rehype-remove-empty-attribute": "^4.0.1",
     "rehype-stringify": "10.0.1",
+    "react": "^19.2.4",
+    "react-dom": "^19.2.4",
     "remark-attribute-list": "0.4.0",
     "remark-cjk-friendly": "^1.2.3",
     "remark-cjk-friendly-gfm-strikethrough": "^1.2.3",
     "remark-parse": "^11.0.0",
-    "sass": "^1.89.2",
-    "semver": "^7.7.2",
+    "sass": "^1.97.3",
+    "semver": "^7.7.4",
     "to-vfile": "8.0.0",
     "unified": "11.0.5",
     "unist-util-remove": "^4.0.0",
-    "unist-util-visit": "5.0.0",
+    "unist-util-visit": "5.1.0",
     "vfile": "6.0.3"
   },
   "devDependencies": {
     "@types/hast": "3.0.4",
     "@types/mdast": "4.0.4",
-    "@types/node": "^24.10.4",
-    "@types/semver": "^7.7.0",
+    "@types/node": "^24.10.13",
+    "@types/semver": "^7.7.1",
     "@types/unist": "3.0.3",
-    "typescript": "^5.9.2"
+    "typescript": "^5.9.3"
   }
 }

src/lib/RedirectIntegration.ts

@@ -26,7 +26,11 @@ export default function redirect(): AstroIntegration {
           const { redirect_to, redirect_from } = file.data;
           const here =
             "/" +
-            relative(pages, file.path).replace(
+            // `path.relative()` returns platform-specific separators.
+            // Redirect routes must be URL paths, so normalize to POSIX.
+            relative(pages, file.path)
+              .replaceAll("\\", "/")
+              .replace(
               /(?:index)?\.(?:md|mdx|markdown|astro)$/,
               ""
             );

src/lib/ignoreassets/index.ts

@@ -19,7 +19,11 @@ import { packages } from "../../../package-lock.json";
  * `semver` が解釈可能な形式で指定します。動作確認した上で適宜修正してください。
  * {@link ./README.md}も参照してください。
  */
-const TESTED_ASTRO_VERSION_RANGE = "5.0.0 - 5.12.7";
+// NOTE:
+// This integration only relies on stable public Astro integration hooks.
+// Restricting to a narrow "tested" patch range makes dependency updates painful,
+// so we accept any Astro 5.x here.
+const TESTED_ASTRO_VERSION_RANGE = ">=5.0.0 <6.0.0";
 
 export class VersionNotSatisfied extends Error {
   constructor(