feat(core): add Electron runtime, services, and app composition

src/main/anilist-url-guard.ts

@@ -0,0 +1,24 @@
+const ANILIST_ALLOWED_HOSTS = new Set(['anilist.co', 'www.anilist.co']);
+
+export function isAllowedAnilistExternalUrl(rawUrl: string): boolean {
+  try {
+    const parsedUrl = new URL(rawUrl);
+    return (
+      parsedUrl.protocol === 'https:' && ANILIST_ALLOWED_HOSTS.has(parsedUrl.hostname.toLowerCase())
+    );
+  } catch {
+    return false;
+  }
+}
+
+export function isAllowedAnilistSetupNavigationUrl(rawUrl: string): boolean {
+  if (isAllowedAnilistExternalUrl(rawUrl)) {
+    return true;
+  }
+  try {
+    const parsedUrl = new URL(rawUrl);
+    return parsedUrl.protocol === 'data:';
+  } catch {
+    return false;
+  }
+}