fix: add adminGetVideo/adminGetArticle queries to fix 404 on edit pages

The edit page loaders were calling adminListVideos/adminListArticles with the
old pre-pagination signatures and filtering by ID client-side, which broke
after pagination limited results to 50. Now fetches the single item by ID
directly via new adminGetVideo and adminGetArticle backend queries.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

packages/frontend/src/lib/services.ts

@@ -1339,6 +1339,51 @@ export async function adminListVideos(
   });
 }
 
+const ADMIN_GET_VIDEO_QUERY = gql`
+  query AdminGetVideo($id: String!) {
+    adminGetVideo(id: $id) {
+      id
+      slug
+      title
+      description
+      image
+      movie
+      tags
+      upload_date
+      premium
+      featured
+      likes_count
+      plays_count
+      models {
+        id
+        artist_name
+        slug
+        avatar
+      }
+      movie_file {
+        id
+        filename
+        mime_type
+        duration
+      }
+    }
+  }
+`;
+
+export async function adminGetVideo(
+  id: string,
+  fetchFn?: typeof globalThis.fetch,
+  token?: string,
+): Promise<Video | null> {
+  return loggedApiCall("adminGetVideo", async () => {
+    const client = token ? getAuthClient(token) : getGraphQLClient(fetchFn);
+    const data = await client.request<{ adminGetVideo: Video | null }>(ADMIN_GET_VIDEO_QUERY, {
+      id,
+    });
+    return data.adminGetVideo;
+  });
+}
+
 const CREATE_VIDEO_MUTATION = gql`
   mutation CreateVideo(
     $title: String!
@@ -1543,6 +1588,44 @@ export async function adminListArticles(
   });
 }
 
+const ADMIN_GET_ARTICLE_QUERY = gql`
+  query AdminGetArticle($id: String!) {
+    adminGetArticle(id: $id) {
+      id
+      slug
+      title
+      excerpt
+      content
+      image
+      tags
+      publish_date
+      category
+      featured
+      author {
+        id
+        artist_name
+        slug
+        avatar
+      }
+    }
+  }
+`;
+
+export async function adminGetArticle(
+  id: string,
+  fetchFn?: typeof globalThis.fetch,
+  token?: string,
+): Promise<Article | null> {
+  return loggedApiCall("adminGetArticle", async () => {
+    const client = token ? getAuthClient(token) : getGraphQLClient(fetchFn);
+    const data = await client.request<{ adminGetArticle: Article | null }>(
+      ADMIN_GET_ARTICLE_QUERY,
+      { id },
+    );
+    return data.adminGetArticle;
+  });
+}
+
 const CREATE_ARTICLE_MUTATION = gql`
   mutation CreateArticle(
     $title: String!

packages/frontend/src/routes/admin/articles/[id]/+page.server.ts

@@ -1,16 +1,17 @@
-import { adminListArticles, adminListUsers } from "$lib/services";
+import { adminGetArticle, adminListUsers } from "$lib/services";
 import { error } from "@sveltejs/kit";
 
 export async function load({ params, fetch, cookies }) {
   const token = cookies.get("session_token") || "";
-  const [articles, modelsResult] = await Promise.all([
-    adminListArticles(fetch, token).catch(() => []),
+  const [article, modelsResult] = await Promise.all([
+    adminGetArticle(params.id, fetch, token).catch(() => null),
     adminListUsers({ role: "model", limit: 200 }, fetch, token).catch(() => ({
       items: [],
       total: 0,
     })),
   ]);
-  const article = articles.find((a) => a.id === params.id);
+
   if (!article) throw error(404, "Article not found");
+
   return { article, authors: modelsResult.items };
 }

packages/frontend/src/routes/admin/videos/[id]/+page.server.ts

@@ -1,15 +1,14 @@
-import { adminListVideos, getModels } from "$lib/services";
+import { adminGetVideo, getModels } from "$lib/services";
 import { error } from "@sveltejs/kit";
 
 export async function load({ params, fetch, cookies }) {
   const token = cookies.get("session_token") || "";
-  const [allVideos, models] = await Promise.all([
-    adminListVideos(fetch, token).catch(() => []),
-    getModels(fetch).catch(() => []),
+  const [video, modelsResult] = await Promise.all([
+    adminGetVideo(params.id, fetch, token).catch(() => null),
+    getModels({}, fetch).catch(() => ({ items: [], total: 0 })),
   ]);
 
-  const video = allVideos.find((v) => v.id === params.id);
   if (!video) throw error(404, "Video not found");
 
-  return { video, models };
+  return { video, models: modelsResult.items };
 }