refactor(chat): simplify paid message lock state

src/stores/chat/chat-send-flow.ts

@@ -119,7 +119,6 @@ export const clearUpgradePromptAction = chatAssign(() => ({
   upgradePromptVisible: false,
   upgradeReason: null,
   canSendMessage: true,
-  cannotSendReason: null,
   requiredCredits: 0,
   shortfallCredits: 0,
 }));
@@ -173,7 +172,6 @@ async function sendMessageViaHttp(content: string): Promise<{
   void chatRepo.prefetchMediaForSendResponse(result.data);
   const isInsufficientCredits =
     result.data.canSendMessage === false &&
-    result.data.cannotSendReason === "insufficient_credits" &&
     !hasRenderableSendResponse(result.data);
   return {
     response: result.data,
@@ -183,12 +181,17 @@ async function sendMessageViaHttp(content: string): Promise<{
 }
 
 function hasRenderableSendResponse(response: ChatSendResponse): boolean {
+  const isLockedPaidMessage =
+    response.lockDetail.locked &&
+    (response.lockDetail.reason === "private_message" ||
+      response.lockDetail.reason === "voice_message" ||
+      response.lockDetail.reason === "image_paywall" ||
+      response.lockDetail.reason === "image");
+
   return (
     response.reply.trim().length > 0 ||
     response.audioUrl.trim().length > 0 ||
     Boolean(response.image.url) ||
-    response.lockDetail.reason === "private_message" ||
-    response.lockDetail.reason === "voice_message" ||
-    response.lockDetail.reason === "image_paywall"
+    isLockedPaidMessage
   );
 }