feat: Add auth handoff mutations for mobile-to-web authentication

Adds GraphQL types and schema for:
- createAuthHandoffToken: Creates short-lived token for auth handoff
- exchangeAuthHandoffToken: Exchanges handoff token for Firebase custom token

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

src/index.tsx

@@ -79,6 +79,12 @@ export enum AlignedIntervalEnum {
   Year = "YEAR",
 }
 
+export type AuthHandoffTokenGql = {
+  __typename?: "AuthHandoffTokenGQL";
+  expiresInSeconds: Scalars["Int"]["output"];
+  token: Scalars["String"]["output"];
+};
+
 export type BankFeaturesGql = {
   __typename?: "BankFeaturesGQL";
   bankAngle: Scalars["Float"]["output"];
@@ -140,6 +146,21 @@ export type BucketSetInputGql = {
   feature: Scalars["String"]["input"];
 };
 
+export type CancellationFeedbackMetadataInput = {
+  appVersion?: InputMaybe<Scalars["String"]["input"]>;
+  gitRevision?: InputMaybe<Scalars["String"]["input"]>;
+  platform?: InputMaybe<Scalars["String"]["input"]>;
+};
+
+export enum CancellationReasonEnum {
+  DataNotAccurate = "DATA_NOT_ACCURATE",
+  DontPlayEnough = "DONT_PLAY_ENOUGH",
+  MissingFeatures = "MISSING_FEATURES",
+  Other = "OTHER",
+  TechnicalIssues = "TECHNICAL_ISSUES",
+  TooExpensive = "TOO_EXPENSIVE",
+}
+
 export type Challenge = {
   __typename?: "Challenge";
   createdAt: Scalars["DateTime"]["output"];
@@ -303,6 +324,12 @@ export type EnumAggregation = {
   feature: Scalars["String"]["input"];
 };
 
+export type ExchangeAuthHandoffResultGql = {
+  __typename?: "ExchangeAuthHandoffResultGQL";
+  customToken: Scalars["String"]["output"];
+  userId: Scalars["Int"]["output"];
+};
+
 export type FilterInput =
   | {
       andFilters: Array<FilterInput>;
@@ -2327,6 +2354,7 @@ export type Mutation = {
   blockUser: Scalars["Boolean"]["output"];
   cancelSubscription: UserSubscriptionStatusGql;
   commentOnVideo: Scalars["Boolean"]["output"];
+  createAuthHandoffToken: AuthHandoffTokenGql;
   createBucketSet: BucketSetGql;
   createChallenge: Challenge;
   createRuleSet: RuleSet;
@@ -2344,6 +2372,7 @@ export type Mutation = {
   editUploadStream: Scalars["Boolean"]["output"];
   editUser: UserGql;
   ensureStripeCustomerExists: UserGql;
+  exchangeAuthHandoffToken: ExchangeAuthHandoffResultGql;
   findPrerecordTableLayout?: Maybe<HomographyInfoGql>;
   followUser: UserGql;
   getHlsInitUploadLink: GetUploadLinkReturn;
@@ -2361,6 +2390,7 @@ export type Mutation = {
   setLoggerLevel: Scalars["Boolean"]["output"];
   setSegmentDuration: Scalars["Boolean"]["output"];
   startChallenge: ChallengeEntry;
+  submitCancellationFeedback: Scalars["Boolean"]["output"];
   submitChallengeEntry: ChallengeEntry;
   undismissChallenge: Scalars["Boolean"]["output"];
   unfollowUser: UserGql;
@@ -2463,6 +2493,10 @@ export type MutationEditUserArgs = {
   input: EditUserInputGql;
 };
 
+export type MutationExchangeAuthHandoffTokenArgs = {
+  token: Scalars["String"]["input"];
+};
+
 export type MutationFindPrerecordTableLayoutArgs = {
   b64Image: Scalars["String"]["input"];
   videoId: Scalars["Int"]["input"];
@@ -2537,6 +2571,12 @@ export type MutationStartChallengeArgs = {
   challengeId: Scalars["ID"]["input"];
 };
 
+export type MutationSubmitCancellationFeedbackArgs = {
+  feedback?: InputMaybe<Scalars["String"]["input"]>;
+  metadata?: InputMaybe<CancellationFeedbackMetadataInput>;
+  reasons?: InputMaybe<Array<CancellationReasonEnum>>;
+};
+
 export type MutationSubmitChallengeEntryArgs = {
   entryId: Scalars["ID"]["input"];
   videoId: Scalars["ID"]["input"];

src/schema.gql

@@ -1072,6 +1072,13 @@ type Mutation {
   deleteUser: Boolean!
   createSubscription(priceId: String!): CreateSubscriptionResultGQL!
   cancelSubscription: UserSubscriptionStatusGQL!
+  submitCancellationFeedback(
+    reasons: [CancellationReasonEnum!] = null
+    feedback: String = null
+    metadata: CancellationFeedbackMetadataInput = null
+  ): Boolean!
+  createAuthHandoffToken: AuthHandoffTokenGQL!
+  exchangeAuthHandoffToken(token: String!): ExchangeAuthHandoffResultGQL!
   findPrerecordTableLayout(b64Image: String!, videoId: Int!): HomographyInfoGQL
   createUploadStream(
     videoMetadata: VideoMetadataInput!
@@ -1196,6 +1203,31 @@ type CreateSubscriptionResultGQL {
   sessionId: String!
 }
 
+enum CancellationReasonEnum {
+  DONT_PLAY_ENOUGH
+  TOO_EXPENSIVE
+  MISSING_FEATURES
+  TECHNICAL_ISSUES
+  DATA_NOT_ACCURATE
+  OTHER
+}
+
+input CancellationFeedbackMetadataInput {
+  appVersion: String = null
+  gitRevision: String = null
+  platform: String = null
+}
+
+type AuthHandoffTokenGQL {
+  token: String!
+  expiresInSeconds: Int!
+}
+
+type ExchangeAuthHandoffResultGQL {
+  customToken: String!
+  userId: Int!
+}
+
 type CreateUploadStreamReturn {
   videoId: Int!
 }