v2 download API and Admin UI fixes (#177)

* fix: small ui fixes

* feat: #171

* fix: improvements to library scanning on admin UI

* feat: v2 download API

* fix: add download context cleanup

* fix: lint

server/api/v2/client/context.post.ts

@@ -0,0 +1,22 @@
+import { type } from "arktype";
+import { readDropValidatedBody, throwingArktype } from "~/server/arktype";
+import { defineClientEventHandler } from "~/server/internal/clients/event-handler";
+import contextManager from "~/server/internal/downloads/coordinator";
+
+const CreateContext = type({
+  game: "string",
+  version: "string",
+}).configure(throwingArktype);
+
+export default defineClientEventHandler(async (h3) => {
+  const body = await readDropValidatedBody(h3, CreateContext);
+
+  const context = await contextManager.createContext(body.game, body.version);
+  if (!context)
+    throw createError({
+      statusCode: 400,
+      statusMessage: "Invalid game or version",
+    });
+
+  return { context };
+});