Extract relay-agnostic forum fetchers from the stores

src/lib/groups.svelte.ts

@@ -1,16 +1,7 @@
 import { queryForum } from "$lib/relay";
+import { fetchGroups, type GroupSummary } from "$lib/forum/groups";
 
-export type GroupSummary = {
-  id: string; // NIP-29 group id (the `d` tag) — also the room URL slug
-  name: string;
-  picture?: string;
-  about?: string;
-  createdAt: number;
-  flags: string[]; // special NIP-29 markers present (private, hidden, closed, restricted)
-};
-
-// NIP-29 metadata markers we surface as room tags, in display order.
-const SPECIAL_FLAGS = ["private", "hidden", "closed", "restricted"];
+export type { GroupSummary };
 
 let list = $state<GroupSummary[]>([]);
 let loaded = $state(false);
@@ -24,26 +15,9 @@ export const groupsStore = {
   },
 };
 
-// Fetch every group the relay hosts. NIP-29 publishes one kind 39000 metadata
-// event per group, so an unfiltered query enumerates them all.
 export async function loadGroups() {
   try {
-    const events = await queryForum({ kinds: [39000] });
-    list = events
-      .map((e) => {
-        const id = e.tags.find((t) => t[0] === "d")?.[1] ?? "";
-        return {
-          id,
-          name: e.tags.find((t) => t[0] === "name")?.[1] ?? id,
-          picture: e.tags.find((t) => t[0] === "picture")?.[1],
-          about: e.tags.find((t) => t[0] === "about")?.[1],
-          createdAt: e.created_at,
-          flags: SPECIAL_FLAGS.filter((f) => e.tags.some((t) => t[0] === f)),
-        };
-      })
-      .filter((g) => g.id)
-      // Oldest first.
-      .sort((a, b) => a.createdAt - b.createdAt);
+    list = await fetchGroups(queryForum);
   } finally {
     loaded = true;
   }