Route landing account sign-ins to checkout

frontend/components/account/AccountCenter.tsx

@@ -675,7 +675,7 @@ export function AccountCenter() {
             </button>
           ) : (
             <Link
-              href="/auth/login?next=%2Faccount"
+              href="/auth/login?next=%2Faccount%3Fcheckout%3D1"
               className="flex items-center gap-2 rounded-lg border border-blue-200 bg-blue-50 px-4 py-2 text-sm font-semibold text-blue-700 transition-all hover:bg-blue-100"
             >
               <LogIn size={16} /> {copy.signIn}

frontend/components/account/__tests__/trialUpgradeConversion.test.ts

@@ -11,6 +11,14 @@ export function runTests() {
   const accountCenter = fs.readFileSync(path.join(accountDir, "AccountCenter.tsx"), "utf8");
   const paymentFlow = fs.readFileSync(path.join(accountDir, "usePaymentFlow.ts"), "utf8");
   const accountPayment = fs.readFileSync(path.join(accountDir, "useAccountPayment.ts"), "utf8");
+  const landingPage = fs.readFileSync(
+    path.join(projectRoot, "components", "landing", "InstitutionalLandingPage.tsx"),
+    "utf8",
+  );
+  const landingAuthActions = fs.readFileSync(
+    path.join(projectRoot, "components", "landing", "LandingAuthActions.tsx"),
+    "utf8",
+  );
   const productAccess = fs.readFileSync(
     path.join(projectRoot, "components", "dashboard", "scan-terminal", "ProductAccessRequired.tsx"),
     "utf8",
@@ -30,6 +38,19 @@ export function runTests() {
     "account page must support /account?checkout=1 for direct upgrade entry",
   );
 
+  assert(
+    accountCenter.includes('href="/auth/login?next=%2Faccount%3Fcheckout%3D1"'),
+    "account page sign-in button must preserve the checkout entry for unauthenticated subscription recovery",
+  );
+
+  assert(
+    landingAuthActions.includes('href="/account?checkout=1"') &&
+      landingPage.includes('href="/account?checkout=1"') &&
+      !/href="\/account"(?![/?#])/.test(landingAuthActions) &&
+      !/href="\/account"(?![/?#])/.test(landingPage),
+    "landing subscription/account CTAs must open the checkout account entry instead of a generic account page",
+  );
+
   assert(
     productAccess.includes('href="/account?checkout=1"') &&
       productAccess.includes("Renew and restore access") &&