Keep a guest community logo on review and on the published rule.

Sign-in was clearing the staged file before it uploaded, and review only read the server URL, so a chosen logo disappeared after the upload step.

app/(app)/create/hooks/useCreateFlowFinalize.ts

@@ -2,6 +2,7 @@
 
 import { useCallback, useState } from "react";
 import { buildPublishPayload } from "../../../../lib/create/buildPublishPayload";
+import { stateWithPendingCommunityAvatar } from "../../../../lib/create/flushPendingCommunityAvatar";
 import { publishRule, updatePublishedRule } from "../../../../lib/create/api";
 import { writeLastPublishedRule } from "../../../../lib/create/lastPublishedRule";
 import { writePendingKeepRuleLogin } from "../../../../lib/create/pendingKeepRuleLogin";
@@ -63,8 +64,19 @@ export function useCreateFlowFinalize({
     if (sessionUser === undefined) return;
 
     setPublishBannerMessage(null);
-    const payloadResult = buildPublishPayload(state);
+    setIsPublishing(true);
+    const prepared = await stateWithPendingCommunityAvatar(state);
+    if (prepared.ok === false) {
+      setIsPublishing(false);
+      setPublishBannerMessage(messages.create.upload.errors.generic);
+      return;
+    }
+    if (prepared.state.communityAvatarUrl !== state.communityAvatarUrl) {
+      updateState({ communityAvatarUrl: prepared.state.communityAvatarUrl });
+    }
+    const payloadResult = buildPublishPayload(prepared.state);
     if (payloadResult.ok === false) {
+      setIsPublishing(false);
       setPublishBannerMessage(
         payloadResult.error === "missingCommunityName"
           ? messages.create.reviewAndComplete.publish.missingCommunityName
@@ -73,7 +85,6 @@ export function useCreateFlowFinalize({
       return;
     }
     const { title, summary, document: ruleDocument } = payloadResult;
-    setIsPublishing(true);
 
     const editingId =
       typeof state.editingPublishedRuleId === "string"