feat: finish the homepage plugin, move service links and canvas out of core (B19)

plugins/homepage/src/backend/services.ts

@@ -0,0 +1,27 @@
+import type { PluginContext } from "@termix/plugin-sdk/backend";
+import type { HomepageRepository } from "./repository.js";
+
+/** The "homepage.items" service, version 1. Runs as the caller's user. */
+export interface HomepageItemsV1 {
+  list: () => Promise<
+    Array<{ id: number; typeId: string; title: string | null }>
+  >;
+}
+
+export function createHomepageItemsService(
+  ctx: PluginContext,
+  repo: HomepageRepository,
+): HomepageItemsV1 {
+  return {
+    list: async () => {
+      const userId = ctx.currentActor();
+      if (!userId) return [];
+      const rows = await repo.listItemsByUser(userId);
+      return rows.map((row) => ({
+        id: row.id,
+        typeId: row.typeId,
+        title: row.title,
+      }));
+    },
+  };
+}