feat(flags): add PhoneVerification beta flag for onboarding

Add a new Internal-track beta flag to gate phone number verification
during onboarding independently from PhoneNumberSend. Contact
permissions remain tied to PhoneNumberSend.

Signed-off-by: Brandon McAnsh <git@bmcreations.dev>

Author: bmc08gt

apps/flipcash/features/login/src/main/kotlin/com/flipcash/app/login/OnboardingFlowScreen.kt

@@ -98,7 +98,7 @@ import kotlinx.coroutines.flow.onEach
  *   **and** [FeatureFlag.ContactPickerMode] is off. When ContactPickerMode is on,
  *   contacts are accessed via the system picker at call site (no READ_CONTACTS needed).
  *   Already-granted permissions are auto-skipped via [PermissionsPhaseFlowHost].
- * ² Phone verification is shown only when [FeatureFlag.PhoneNumberSend] is enabled
+ * ² Phone verification is shown only when [FeatureFlag.OnboardingPhoneVerification] is enabled
  *   and no phone is linked. Skipped entirely when the flag is off.
  *   Uses `target` to replace the nav stack with AccessKey on success.
  */

apps/flipcash/features/login/src/main/kotlin/com/flipcash/app/login/router/LoginViewModel.kt

@@ -66,9 +66,9 @@ class LoginViewModel @Inject constructor(
     init {
         combine(
             userManager.state,
-            featureFlags.observe(FeatureFlag.PhoneNumberSend),
-        ) { userState, phoneNumberSendFlag ->
-            val enabled = phoneNumberSendFlag || userState.flags?.enablePhoneNumberSend == true
+            featureFlags.observe(FeatureFlag.OnboardingPhoneVerification),
+        ) { userState, phoneVerificationFlag ->
+            val enabled = phoneVerificationFlag || userState.flags?.enablePhoneNumberSend == true
             val hasLinkedPhone = userState.userProfile?.verifiedPhoneNumber != null
             enabled && !hasLinkedPhone
         }.onEach { needed ->

apps/flipcash/shared/featureflags/src/main/kotlin/com/flipcash/app/featureflags/FeatureFlag.kt

@@ -4,8 +4,6 @@ import android.os.Build
 import com.flipcash.app.featureflags.model.BackgroundResetTimeout
 import com.flipcash.app.core.navigation.NavBarConfig
 import com.flipcash.app.ksp.annotations.FeatureFlagMarker
-import kotlin.time.Duration
-import kotlin.time.Duration.Companion.minutes
 
 enum class FeatureTrack {
     /** Visible to all users including production. */
@@ -200,6 +198,15 @@ sealed interface FeatureFlag<T: Any> {
         override val minTrack: FeatureTrack = FeatureTrack.Production
     }
 
+    @FeatureFlagMarker
+    data object OnboardingPhoneVerification : FeatureFlag<Boolean> {
+        override val key: String = "phone_verification_onboarding_enabled"
+        override val default: Boolean = false
+        override val launched: Boolean = false
+        override val visible: Boolean = true
+        override val persistLogOut: Boolean = true
+    }
+
     @FeatureFlagMarker
     data object Messenger : FeatureFlag<Boolean> {
         override val key: String = "messenger_enabled"
@@ -250,6 +257,7 @@ val FeatureFlag<*>.title: String
         FeatureFlag.BackgroundReset -> "Background Reset"
         FeatureFlag.ContactPickerMode -> "Contact Picker Mode"
         FeatureFlag.PhoneNumberSend -> "Phone Number Send"
+        FeatureFlag.OnboardingPhoneVerification -> "Onboarding Phone Verification"
         FeatureFlag.Messenger -> "Messenger"
         FeatureFlag.NavBar -> "Navigation Bar"
     }
@@ -274,6 +282,7 @@ val FeatureFlag<*>.message: String
         FeatureFlag.BackgroundReset -> "Automatically returns the app to the camera screen after a period of inactivity with the app in the background"
         FeatureFlag.ContactPickerMode -> "When enabled, contacts will be accessed via the system contact picker instead of requesting full READ_CONTACTS permission"
         FeatureFlag.PhoneNumberSend -> "When enabled, you'll gain the ability to send cash directly to contacts via phone number and chat with them using the messenger"
+        FeatureFlag.OnboardingPhoneVerification -> "When enabled, new accounts will be prompted to verify their phone number during onboarding"
         FeatureFlag.Messenger -> "When enabled, tapping a contact will open the chat messenger instead of navigating directly to send"
         FeatureFlag.NavBar -> "Customize the order and labels of navigation bar buttons"
     }