Merge solo sealed answers that unlock on pairing into staging

apps/mobile/src/lib/coupleApi.ts

@@ -4,6 +4,8 @@ import { apiRequest } from "./apiClient";
 export interface CoupleStateResponse {
     couple: Couple | null;
     partner: Profile | null;
+    /** Count of this user's banked answers with no couple yet (couple_id IS NULL). */
+    sealed_count: number;
 }
 
 export interface CoupleMutationResponse {

apps/mobile/src/lib/inviteShareCopy.ts

@@ -0,0 +1,14 @@
+/**
+ * Builds the message shared when inviting a partner to pair. Once the inviter has
+ * sealed answers banked (answered questions solo, before a partner joined), the
+ * copy leads with that earned value instead of a plain invite, because it gives
+ * the recipient a concrete reason to join right away.
+ */
+export function buildInviteShareMessage(inviteCode: string, sealedCount: number): string {
+    const link = `https://sauci.app/join/${inviteCode} (or enter code ${inviteCode} in the app)`;
+    if (sealedCount > 0) {
+        const noun = sealedCount === 1 ? "question" : "questions";
+        return `Join me on Sauci! I have already answered ${sealedCount} ${noun} about us. Tap this link to unlock them: ${link}`;
+    }
+    return `Join me on Sauci! Tap this link to pair up instantly: ${link}`;
+}