refactor(auth): remove redundant authEnabled flag from contexts and components

Eliminate the unused authEnabled property from context providers, hooks,
components, and API responses. All logic and UI now assume authentication is
required, simplifying prop signatures and reducing branching. Update related
types, context values, and function calls to reflect this change. This streamlines
the authentication flow and removes unnecessary configuration.

src/app/(app)/epub/[id]/useEpubDocument.ts

@@ -18,7 +18,6 @@ import { EpubRenderedLocationCloneManager } from '@/lib/client/epub/rendered-loc
 import { canonicalizeEpubSegmentAgainstSpineText } from '@/lib/client/epub/canonicalize-epub-segment';
 import { buildEpubLocator, getSpineItemPlainText } from '@/lib/client/epub/spine-coordinates';
 import { useTTS, type EpubLocatorResolver } from '@/contexts/TTSContext';
-import { useAuthConfig } from '@/contexts/AuthRateLimitContext';
 import { createRangeCfi } from '@/lib/client/epub';
 import { normalizeTtsLocationKey } from '@/lib/shared/tts-locator';
 import { useConfig } from '@/contexts/ConfigContext';
@@ -94,7 +93,6 @@ export interface EpubDocumentState {
  */
 export function useEpubDocument(documentId?: string): EpubDocumentState {
   const { setText: setTTSText, currDocPage, currDocPages, setCurrDocPages, stop, skipToLocation, setIsEPUB } = useTTS();
-  const { authEnabled } = useAuthConfig();
   // Configuration context to get TTS settings
   const {
     apiKey,
@@ -372,7 +370,6 @@ export function useEpubDocument(documentId?: string): EpubDocumentState {
 
   const handleLocationChanged = useEPUBLocationController({
     documentId,
-    authEnabled,
     isEpubSetOnceRef: isEPUBSetOnce,
     shouldPauseRef,
     setIsEpub: setIsEPUB,

src/app/(app)/layout.tsx

@@ -28,7 +28,6 @@ export default function AppLayout({ children }: { children: ReactNode }) {
 
   return (
     <Providers
-      authEnabled
       authBaseUrl={authBaseUrl}
       allowAnonymousAuthSessions={allowAnonymousAuthSessions}
       githubAuthEnabled={githubAuthEnabled}

src/app/(app)/signin/page.tsx

@@ -31,7 +31,7 @@ function SignInContent() {
   const [rememberMe, setRememberMe] = useState(true);
   const [sessionExpired, setSessionExpired] = useState(false);
   const [error, setError] = useState<string | null>(null);
-  const { authEnabled, baseUrl, allowAnonymousAuthSessions, githubAuthEnabled } = useAuthConfig();
+  const { baseUrl, allowAnonymousAuthSessions, githubAuthEnabled } = useAuthConfig();
   const enableUserSignups = useFeatureFlag('enableUserSignups');
   const { refresh: refreshRateLimit } = useAuthRateLimit();
 
@@ -242,7 +242,7 @@ function SignInContent() {
           <p className="text-xs text-muted">
             By signing in, you agree to our{' '}
             <button
-              onClick={() => showPrivacyModal({ authEnabled })}
+              onClick={() => showPrivacyModal()}
               className="underline hover:text-foreground"
             >
               Privacy Policy

src/app/(app)/signup/page.tsx

@@ -20,7 +20,7 @@ export default function SignUpPage() {
   const [showPassword, setShowPassword] = useState(false);
   const [loading, setLoading] = useState(false);
   const [error, setError] = useState<string | null>(null);
-  const { authEnabled, baseUrl } = useAuthConfig();
+  const { baseUrl } = useAuthConfig();
   const enableUserSignups = useFeatureFlag('enableUserSignups');
   const { refresh: refreshRateLimit } = useAuthRateLimit();
 
@@ -251,7 +251,7 @@ export default function SignUpPage() {
           <p className="text-xs text-muted">
             By creating an account, you agree to our{' '}
             <button
-              onClick={() => showPrivacyModal({ authEnabled })}
+              onClick={() => showPrivacyModal()}
               className="underline hover:text-foreground"
             >
               Privacy Policy

src/app/api/rate-limit/status/route.ts

@@ -41,7 +41,6 @@ export async function GET(req: NextRequest) {
         remainingChars: ttsRateLimitEnabled ? limits.anonymous : Number.MAX_SAFE_INTEGER,
         resetTimeMs,
         userType: 'unauthenticated',
-        authEnabled: true
       });
     }
 
@@ -72,7 +71,6 @@ export async function GET(req: NextRequest) {
       remainingChars: result.remainingChars,
       resetTimeMs: result.resetTimeMs,
       userType: isAnonymous ? 'anonymous' : 'authenticated',
-      authEnabled: true
     });
 
     if (device?.didCreate) {

src/app/providers.tsx

@@ -10,13 +10,12 @@ import { AuthLoader } from '@/components/auth/AuthLoader';
 
 interface ProvidersProps {
   children: ReactNode;
-  authEnabled: boolean;
   authBaseUrl: string | null;
   allowAnonymousAuthSessions: boolean;
   githubAuthEnabled: boolean;
 }
 
-export function Providers({ children, authEnabled, authBaseUrl, allowAnonymousAuthSessions, githubAuthEnabled }: ProvidersProps) {
+export function Providers({ children, authBaseUrl, allowAnonymousAuthSessions, githubAuthEnabled }: ProvidersProps) {
   const [queryClient] = useState(() => new QueryClient({
     defaultOptions: {
       queries: {
@@ -30,7 +29,6 @@ export function Providers({ children, authEnabled, authBaseUrl, allowAnonymousAu
     <QueryClientProvider client={queryClient}>
       <RuntimeConfigProvider>
         <AuthRateLimitProvider
-          authEnabled={authEnabled}
           authBaseUrl={authBaseUrl}
           allowAnonymousAuthSessions={allowAnonymousAuthSessions}
           githubAuthEnabled={githubAuthEnabled}

src/components/PrivacyModal.tsx

@@ -150,15 +150,13 @@ export function PrivacyModal({ isOpen, onAccept, onDismiss }: PrivacyModalProps)
  * Function to programmatically show the privacy popup
  * This can be called from signin/signup components
  */
-export function showPrivacyModal(options?: { authEnabled?: boolean }): void {
+export function showPrivacyModal(): void {
   // Create a temporary container for the popup
   const container = document.createElement('div');
   container.id = 'privacy-modal-container';
   document.body.appendChild(container);
 
   const origin = typeof window !== 'undefined' ? window.location.origin : '';
-  void options;
-
   // Import React and render the popup
   import('react-dom/client').then(({ createRoot }) => {
     import('react').then((React) => {

src/components/SettingsModal.tsx

@@ -556,7 +556,7 @@ export function SettingsModal({
                     </div>
                     <div className="flex items-center">
                       <Button
-                        onClick={() => showPrivacyModal({ authEnabled: true })}
+                        onClick={() => showPrivacyModal()}
                         className="text-sm font-medium text-muted hover:text-accent transition-colors"
                       >
                         Privacy

src/components/auth/AuthLoader.tsx

@@ -91,7 +91,7 @@ function isRateLimited(info: ErrorInfo | null): boolean {
 }
 
 export function AuthLoader({ children }: { children: ReactNode }) {
-  const { authEnabled, baseUrl, allowAnonymousAuthSessions } = useAuthConfig();
+  const { baseUrl, allowAnonymousAuthSessions } = useAuthConfig();
   const { refresh: refreshRateLimit } = useAuthRateLimit();
   const { data: session, isPending, error: sessionError, refetch: refetchSession } = useAuthSession();
   const router = useRouter();
@@ -109,7 +109,7 @@ export function AuthLoader({ children }: { children: ReactNode }) {
     attemptedForNullSessionRef.current = false;
     setBootstrapError(null);
     setIsRedirecting(false);
-  }, [authEnabled, baseUrl, allowAnonymousAuthSessions, pathname]);
+  }, [baseUrl, allowAnonymousAuthSessions, pathname]);
 
   useEffect(() => {
     const checkStatus = async () => {
@@ -224,7 +224,6 @@ export function AuthLoader({ children }: { children: ReactNode }) {
   }, [
     session,
     isPending,
-    authEnabled,
     baseUrl,
     allowAnonymousAuthSessions,
     refreshRateLimit,

src/components/auth/RateLimitBanner.tsx

@@ -12,7 +12,7 @@ export function RateLimitBanner({ className = '' }: RateLimitBannerProps) {
   const { status, isAtLimit, timeUntilReset } = useAuthRateLimit();
   const enableUserSignups = useFeatureFlag('enableUserSignups');
 
-  if (!status?.authEnabled || !isAtLimit) {
+  if (!status || !isAtLimit) {
     return null;
   }
 
@@ -52,7 +52,7 @@ export function RateLimitBanner({ className = '' }: RateLimitBannerProps) {
 export function RateLimitIndicator({ className = '' }: RateLimitBannerProps) {
   const { status, isAtLimit } = useAuthRateLimit();
 
-  if (!status?.authEnabled) {
+  if (!status) {
     return null;
   }
 

src/contexts/AuthRateLimitContext.tsx

@@ -11,12 +11,10 @@ export interface RateLimitStatus {
   remainingChars: number;
   resetTimeMs: number;
   userType: 'anonymous' | 'authenticated' | 'unauthenticated';
-  authEnabled: boolean;
 }
 
 interface AuthRateLimitContextType {
   // Auth Config
-  authEnabled: boolean;
   authBaseUrl: string | null;
   allowAnonymousAuthSessions: boolean;
   githubAuthEnabled: boolean;
@@ -45,8 +43,8 @@ export function useAuthRateLimit(): AuthRateLimitContextType {
 }
 
 export function useAuthConfig() {
-  const { authEnabled, authBaseUrl, allowAnonymousAuthSessions, githubAuthEnabled } = useAuthRateLimit();
-  return { authEnabled, baseUrl: authBaseUrl, allowAnonymousAuthSessions, githubAuthEnabled };
+  const { authBaseUrl, allowAnonymousAuthSessions, githubAuthEnabled } = useAuthRateLimit();
+  return { baseUrl: authBaseUrl, allowAnonymousAuthSessions, githubAuthEnabled };
 }
 
 export function useRateLimit() {
@@ -87,7 +85,6 @@ function parseRateLimitStatus(raw: unknown): RateLimitStatus | null {
     remainingChars: Number(data.remainingChars ?? 0),
     resetTimeMs: coerceTimestampMs(data.resetTimeMs ?? data.resetTime, nextUtcMidnightTimestampMs()),
     userType,
-    authEnabled: Boolean(data.authEnabled),
   };
 }
 
@@ -105,7 +102,6 @@ export function formatCharCount(count: number): string {
 
 interface AuthRateLimitProviderProps {
   children: ReactNode;
-  authEnabled: boolean;
   authBaseUrl: string | null;
   allowAnonymousAuthSessions: boolean;
   githubAuthEnabled: boolean;
@@ -115,7 +111,6 @@ const RATE_LIMIT_QUERY_KEY = ['rate-limit-status'] as const;
 
 export function AuthRateLimitProvider({
   children,
-  authEnabled,
   authBaseUrl,
   allowAnonymousAuthSessions,
   githubAuthEnabled,
@@ -210,7 +205,6 @@ export function AuthRateLimitProvider({
   }, []);
 
   const contextValue: AuthRateLimitContextType = {
-    authEnabled,
     authBaseUrl,
     allowAnonymousAuthSessions,
     githubAuthEnabled,

src/contexts/TTSContext.tsx

@@ -406,7 +406,6 @@ export function TTSProvider({ children }: { children: ReactNode }): ReactElement
     configTTSModel,
   );
   const {
-    authEnabled,
     onTTSStart,
     onTTSComplete,
     refresh: refreshRateLimit,
@@ -3229,19 +3228,17 @@ export function TTSProvider({ children }: { children: ReactNode }): ReactElement
     };
 
     const load = async () => {
-      if (authEnabled) {
-        try {
-          const remote = await getDocumentProgress(docId);
-          if (!cancelled && remote?.location) {
-            await setLastDocumentLocation(docId, remote.location).catch((error) => {
-              console.warn('Error caching remote location locally:', error);
-            });
-            applyLocation(remote.location);
-            return;
-          }
-        } catch (error) {
-          console.warn('Error loading remote progress:', error);
+      try {
+        const remote = await getDocumentProgress(docId);
+        if (!cancelled && remote?.location) {
+          await setLastDocumentLocation(docId, remote.location).catch((error) => {
+            console.warn('Error caching remote location locally:', error);
+          });
+          applyLocation(remote.location);
+          return;
         }
+      } catch (error) {
+        console.warn('Error loading remote progress:', error);
       }
 
       try {
@@ -3259,7 +3256,7 @@ export function TTSProvider({ children }: { children: ReactNode }): ReactElement
     return () => {
       cancelled = true;
     };
-  }, [id, isEPUB, currentReaderType, authEnabled]);
+  }, [id, isEPUB, currentReaderType]);
 
   // Save current position periodically for non-EPUB readers.
   useEffect(() => {
@@ -3271,18 +3268,16 @@ export function TTSProvider({ children }: { children: ReactNode }): ReactElement
         setLastDocumentLocation(id as string, location).catch(error => {
           console.warn('Error saving non-EPUB location:', error);
         });
-        if (authEnabled) {
-          scheduleDocumentProgressSync({
-            documentId: id as string,
-            readerType: currentReaderType,
-            location,
-          });
-        }
+        scheduleDocumentProgressSync({
+          documentId: id as string,
+          readerType: currentReaderType,
+          location,
+        });
       }, 1000); // Debounce saves by 1 second
 
       return () => clearTimeout(timeoutId);
     }
-  }, [id, isEPUB, currDocPage, currDocPageNumber, currentIndex, sentences.length, currentReaderType, authEnabled]);
+  }, [id, isEPUB, currDocPage, currDocPageNumber, currentIndex, sentences.length, currentReaderType]);
 
   /**
    * Renders the TTS context provider with its children

src/hooks/epub/useEPUBLocationController.ts

@@ -33,7 +33,6 @@ export function shouldPersistEpubLocation(
 
 type UseEpubLocationControllerParams = {
   documentId?: string;
-  authEnabled: boolean;
   isEpubSetOnceRef: MutableRefObject<boolean>;
   shouldPauseRef: MutableRefObject<boolean>;
   setIsEpub: (isEpub: boolean) => void;
@@ -46,7 +45,6 @@ type UseEpubLocationControllerParams = {
 
 export function useEPUBLocationController({
   documentId,
-  authEnabled,
   isEpubSetOnceRef,
   shouldPauseRef,
   setIsEpub,
@@ -138,13 +136,11 @@ export function useEPUBLocationController({
     // Save the location to IndexedDB if not initial
     if (shouldPersistEpubLocation(documentId, locationRef.current)) {
       setLastDocumentLocation(documentId, location.toString());
-      if (authEnabled) {
-        scheduleDocumentProgressSync({
-          documentId,
-          readerType: 'epub',
-          location: location.toString(),
-        });
-      }
+      scheduleDocumentProgressSync({
+        documentId,
+        readerType: 'epub',
+        location: location.toString(),
+      });
     }
 
     skipToLocation(location);
@@ -155,7 +151,6 @@ export function useEPUBLocationController({
       shouldPauseRef.current = true;
     }
   }, [
-    authEnabled,
     bookRef,
     documentId,
     extractPageText,

src/lib/server/auth/auth.ts

@@ -320,7 +320,6 @@ export type User = AuthSessionUser & {
 };
 
 export type AuthContext = {
-  authEnabled: true;
   session: Session | null;
   user: User | null;
   userId: string | null;
@@ -342,7 +341,7 @@ export async function getAuthContext(request: Pick<NextRequest, 'headers'>): Pro
     }
   }
 
-  return { authEnabled: true, session, user, userId };
+  return { session, user, userId };
 }
 
 export async function requireAuthContext(