Fix sharing

tests/hooks/useGame.navigation.test.tsx

@@ -8,7 +8,11 @@ describe('URL Routing and Navigation', () => {
       role: 'HOST' | 'CLIENT',
       currentPath: string,
       sourceQuizId: string | null = null
-    ): string => {
+    ): string | null => {
+      if (currentPath === '/callback' || currentPath.startsWith('/shared/')) {
+        return null;
+      }
+      
       switch (gameState) {
         case 'LANDING':
           if (gamePin && currentPath.startsWith('/play/')) {
@@ -42,6 +46,26 @@ describe('URL Routing and Navigation', () => {
       }
     };
 
+    describe('Shared quiz routes', () => {
+      it('should return null for /shared/:token routes to skip navigation', () => {
+        expect(getTargetPath('LANDING', null, 'HOST', '/shared/abc123')).toBeNull();
+      });
+
+      it('should return null for /shared/:token with complex token', () => {
+        expect(getTargetPath('LANDING', null, 'HOST', '/shared/6yC50NixzVuA-E_Z0JhEUA')).toBeNull();
+      });
+
+      it('should return null for /shared/:token regardless of gameState', () => {
+        expect(getTargetPath('LOBBY', '123456', 'HOST', '/shared/test-token')).toBeNull();
+        expect(getTargetPath('EDITING', null, 'HOST', '/shared/test-token')).toBeNull();
+        expect(getTargetPath('PODIUM', '123456', 'HOST', '/shared/test-token')).toBeNull();
+      });
+
+      it('should return null for /callback route', () => {
+        expect(getTargetPath('LANDING', null, 'HOST', '/callback')).toBeNull();
+      });
+    });
+
     describe('LANDING state', () => {
       it('should return "/" for LANDING state without gamePin', () => {
         expect(getTargetPath('LANDING', null, 'HOST', '/')).toBe('/');
@@ -139,6 +163,10 @@ describe('URL Routing and Navigation', () => {
       path: string,
       storedSession: StoredSession | null
     ): { action: string; gamePin?: string; quizId?: string; shouldReconnect?: boolean } => {
+      if (path === '/callback' || path.startsWith('/shared/')) {
+        return { action: 'skipInit' };
+      }
+      
       const hostMatch = path.match(/^\/host\/(\d+)$/);
       const playMatch = path.match(/^\/play\/(\d+)$/);
 
@@ -182,6 +210,29 @@ describe('URL Routing and Navigation', () => {
       return { action: 'showLanding' };
     };
 
+    describe('/shared/:token URL', () => {
+      it('should skip initialization for shared quiz routes', () => {
+        const result = simulateUrlInit('/shared/abc123', null);
+        expect(result.action).toBe('skipInit');
+      });
+
+      it('should skip initialization for shared routes with complex tokens', () => {
+        const result = simulateUrlInit('/shared/6yC50NixzVuA-E_Z0JhEUA', null);
+        expect(result.action).toBe('skipInit');
+      });
+
+      it('should skip initialization for shared routes even with existing session', () => {
+        const session: StoredSession = { pin: '123456', role: 'HOST', hostSecret: 'secret' };
+        const result = simulateUrlInit('/shared/test-token', session);
+        expect(result.action).toBe('skipInit');
+      });
+
+      it('should skip initialization for /callback route', () => {
+        const result = simulateUrlInit('/callback', null);
+        expect(result.action).toBe('skipInit');
+      });
+    });
+
     describe('/host/:pin URL', () => {
       it('should reconnect as host when session matches', () => {
         const session: StoredSession = { pin: '123456', role: 'HOST', hostSecret: 'secret' };
@@ -551,6 +602,28 @@ describe('URL Routing and Navigation', () => {
         expect(navigatedTo).toBe('/');
       });
 
+      it('should NOT redirect /shared/:token to "/" (regression test)', () => {
+        const currentPath = '/shared/6yC50NixzVuA-E_Z0JhEUA';
+        const gameState = 'LANDING';
+        const gamePin: string | null = null;
+        
+        const getTargetPath = () => {
+          if (currentPath.startsWith('/shared/')) {
+            return null;
+          }
+          if (gameState === 'LANDING' && !gamePin) {
+            return '/';
+          }
+          return currentPath;
+        };
+        
+        const targetPath = getTargetPath();
+        const shouldNavigate = targetPath !== null && currentPath !== targetPath;
+        
+        expect(targetPath).toBeNull();
+        expect(shouldNavigate).toBe(false);
+      });
+
       it('should NOT get stuck on /play/:pin after goHomeFromDisconnected (regression test)', () => {
         let gameState = 'DISCONNECTED';
         let gamePin: string | null = '123456';