Add an opt-in SSR mode with a Node adapter behind PUBLIC_SSR

src/lib/chat.svelte.ts

@@ -1,5 +1,5 @@
 import type { Event } from "@nostr/tools";
-import { loadNostrUser, type NostrUser } from "@nostr/gadgets/metadata";
+import { loadNostrUser, type NostrUser } from "$lib/gadgets";
 import { RELAY_URL } from "$lib/config";
 import { auth } from "$lib/auth.svelte";
 import { queryForum, publishForum, subscribeForum } from "$lib/relay";

src/lib/components/ChatContent.svelte

@@ -1,5 +1,5 @@
 <script lang="ts">
-  import { loadNostrUser, type NostrUser } from "@nostr/gadgets/metadata";
+  import { loadNostrUser, type NostrUser } from "$lib/gadgets";
   import { tokenizeChat } from "$lib/linkify";
   import {
     resolveThreadRef,

src/lib/components/MentionAutocomplete.svelte

@@ -1,7 +1,7 @@
 <script lang="ts">
   import { tick } from "svelte";
   import * as nip19 from "@nostr/tools/nip19";
-  import { loadRelayList } from "@nostr/gadgets/lists";
+  import { loadRelayList } from "$lib/gadgets";
   import {
     profileStore,
     searchLocalProfiles,

src/lib/components/PostContent.svelte

@@ -1,5 +1,5 @@
 <script lang="ts">
-  import { loadNostrUser, type NostrUser } from "@nostr/gadgets/metadata";
+  import { loadNostrUser, type NostrUser } from "$lib/gadgets";
   import * as nip19 from "@nostr/tools/nip19";
   import {
     resolveThreadRef,

src/lib/config.ts

@@ -18,6 +18,9 @@ export const GROUP_ID = env.PUBLIC_GROUP_ID ?? "";
 if (MODE === "simple" && !GROUP_ID) {
   throw new Error("PUBLIC_GROUP_ID is required in simple mode");
 }
+// Server-side rendering: opt-in, and only meaningful when the build targets the
+// Node adapter (svelte.config.js reads the same variable).
+export const SSR_ENABLED = env.PUBLIC_SSR === "yes";
 // Requires a relay with NIP-50 support.
 export const SEARCH_ENABLED = env.PUBLIC_SEARCH === "yes";
 export const LABELS = (env.PUBLIC_LABELS ?? "")

src/lib/gadgets.ts

@@ -0,0 +1,17 @@
+import type { NostrUser } from "@nostr/gadgets/metadata";
+import type { ListFetcher, RelayItem } from "@nostr/gadgets/lists";
+
+export type { NostrUser, RelayItem };
+
+// @nostr/gadgets reads localStorage when imported, so it can't be loaded on
+// the server. Every consumer goes through these lazy wrappers; the library is
+// pulled in on first use, in the browser only.
+export async function loadNostrUser(pubkey: string): Promise<NostrUser> {
+  const m = await import("@nostr/gadgets/metadata");
+  return m.loadNostrUser(pubkey);
+}
+
+export const loadRelayList: ListFetcher<RelayItem> = async (...args) => {
+  const m = await import("@nostr/gadgets/lists");
+  return m.loadRelayList(...args);
+};

src/lib/mentions.ts

@@ -1,5 +1,5 @@
 import * as nip19 from "@nostr/tools/nip19";
-import { loadRelayList } from "@nostr/gadgets/lists";
+import { loadRelayList } from "$lib/gadgets";
 
 const RELAY_HINT_TIMEOUT_MS = 1500;
 

src/lib/overview.svelte.ts

@@ -1,7 +1,7 @@
 import type { AbstractRelay } from "@nostr/tools/abstract-relay";
 import type { Event } from "@nostr/tools/core";
 import type { Filter } from "@nostr/tools/filter";
-import { loadNostrUser, type NostrUser } from "@nostr/gadgets/metadata";
+import { loadNostrUser, type NostrUser } from "$lib/gadgets";
 import { ensureForumRelay } from "$lib/relay";
 import { ingestNostrUser } from "$lib/profiles.svelte";
 

src/lib/thread.svelte.ts

@@ -1,4 +1,4 @@
-import { loadNostrUser, type NostrUser } from "@nostr/gadgets/metadata";
+import { loadNostrUser, type NostrUser } from "$lib/gadgets";
 import { RELAY_URL, GROUP_ID } from "$lib/config";
 import { queryForum, publishForum } from "$lib/relay";
 import { threads as mockThreads } from "$lib/mock";

src/lib/threads.svelte.ts

@@ -1,7 +1,7 @@
 import type { AbstractRelay } from "@nostr/tools/abstract-relay";
 import type { Event } from "@nostr/tools/core";
 import type { Filter } from "@nostr/tools/filter";
-import { loadNostrUser, type NostrUser } from "@nostr/gadgets/metadata";
+import { loadNostrUser, type NostrUser } from "$lib/gadgets";
 import { ensureForumRelay } from "$lib/relay";
 import { ingestNostrUser } from "$lib/profiles.svelte";