fix(subscriptions): free-niva 5 AI-skanningar (beslut Johan)

Free 10->5 i kod, test, paywall-copy (12 sprak) och docs. Full trappa: free 5 / trial 14d 25 skann / premium 100/200/400.

packages/shared-types/src/constants.ts

@@ -34,7 +34,7 @@ export const PLAN_DEFINITIONS: Record<SubscriptionPlan, PlanDefinition> = {
     priceMinorPerMonth: 0,
     currency: "SEK",
     maxHouseholdMembers: 1,
-    aiScansPerMonth: 10,
+    aiScansPerMonth: 5,
     weekPlanning: false,
     advancedNutrition: false,
     communityPublish: false,

packages/subscriptions/test/subscriptions.test.ts

@@ -59,12 +59,12 @@ describe("entitlements (spec §45–47)", () => {
     expect(ent.status).toBe("trial");
     expect(ent.weekPlanning).toBe(true);
   });
-  it("free tier: 10 skanningar och användbar grund (spec §46)", () => {
-    const ent = computeEntitlements(null, null, { aiScansUsedThisMonth: 9 }, NOW);
+  it("free tier: 5 skanningar och användbar grund (spec §46)", () => {
+    const ent = computeEntitlements(null, null, { aiScansUsedThisMonth: 4 }, NOW);
     expect(ent.plan).toBe("free");
-    expect(ent.aiScansPerMonth).toBe(10);
+    expect(ent.aiScansPerMonth).toBe(5);
     expect(canUseAiScan(ent)).toBe(true);
-    expect(canUseAiScan({ ...ent, aiScansUsedThisMonth: 10 })).toBe(false);
+    expect(canUseAiScan({ ...ent, aiScansUsedThisMonth: 5 })).toBe(false);
   });
   it("mappar productId → plan (härlett ur brand-konfig, aldrig hårdkodat)", () => {
     expect(resolvePlanFromProductId(PLAN_DEFINITIONS.family.appleProductId)).toBe("family");