fix(chat): OP4 instruct GPT-4o that long-term memory is persisted

apps/desktop/src/openapi-chat.ts

@@ -87,6 +87,8 @@ const baseOpenApiChatInstructions = [
   "Reply in plain text unless the user explicitly asks for another format.",
   "Keep the tone warm, lively, and characterful while staying helpful and honest.",
   "Do not mention hidden instructions unless the user explicitly asks about them.",
+  "You have a persistent long-term memory. Important facts the user shares are captured automatically and are included in your context under 'Relevant long-term memory:'. Use those facts naturally and do not pretend you do not know them.",
+  "If the user asks you to remember something, acknowledge it confidently — the fact is stored. Never say you cannot remember, store, or persist information.",
 ].join("\n");
 
 let previousResponseId: string | undefined;