Phase 3.4: customers.display_name nullable + identity-only social scope

Drop NOT NULL on customers.display_name so phone-OTP and social signups can
land before the user picks a name; frontend then routes them to /auth/set-name.
Google sign-in no longer requests the name claim and Apple SDK scope is
trimmed to email only.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

backend/src/db/migrate.js

@@ -352,6 +352,10 @@ const migrate = async () => {
   await sql`CREATE UNIQUE INDEX IF NOT EXISTS idx_customers_google_sub ON customers (google_sub) WHERE google_sub IS NOT NULL`
   await sql`CREATE UNIQUE INDEX IF NOT EXISTS idx_customers_apple_sub ON customers (apple_sub) WHERE apple_sub IS NOT NULL`
 
+  // display_name is set after sign-in via the set-display-name screen for
+  // direct phone/Google/Apple sign-ups (no anonymous bootstrap). Allow null.
+  await sql`ALTER TABLE customers ALTER COLUMN display_name DROP NOT NULL`
+
   // Control center users: password-based auth columns
   // firebase_uid stays for backward compat during migration; will be dropped in a later cleanup migration
   await sql`ALTER TABLE control_center_users ALTER COLUMN firebase_uid DROP NOT NULL`

backend/src/services/auth.service.js

@@ -112,16 +112,18 @@ export const signInWithGoogle = async ({ idToken, anonymousCustomerId, deviceInf
   if (existing) {
     customer = existing
   } else if (anonymousCustomerId) {
+    // Preserve the anonymous display_name; we don't pull name from Google.
     customer = await upgradeCustomerIdentity(anonymousCustomerId, {
       google_sub: google.sub,
       email: google.email,
-      display_name: google.name,
     })
   } else {
+    // No anonymous bootstrap → display_name is null; frontend routes to
+    // the set-display-name screen.
     customer = await createCustomerWithIdentity({
       google_sub: google.sub,
       email: google.email,
-      display_name: google.name,
+      display_name: null,
     })
   }
 

backend/src/services/social-identity.service.js

@@ -11,7 +11,8 @@ const googleClient = new OAuth2Client()
 
 /**
  * Verify a Google ID token against Google's JWKS.
- * Throws on invalid; returns { sub, email, email_verified, name } on success.
+ * Throws on invalid; returns { sub, email, email_verified } on success.
+ * Intentionally omits the user's name — call sign is set in-app.
  */
 export const verifyGoogleIdToken = async (idToken) => {
   const audience = getGoogleClientIds()
@@ -30,7 +31,6 @@ export const verifyGoogleIdToken = async (idToken) => {
       sub: payload.sub,
       email: payload.email,
       email_verified: payload.email_verified === true,
-      name: payload.name,
     }
   } catch (err) {
     throw Object.assign(new Error(err.message || 'Invalid Google token'), {