Enhance Plex authentication flow and user redirection

- Updated the user.js file to include a setup_mode flag in the Plex link request, aligning it with the existing setup implementation.
- Refined login.html to ensure consistent redirection behavior after successful login and Plex PIN creation.
- Modified plex_auth_routes.py to return a redirect URL in the response for successful Plex login and account linking, improving user experience during authentication.

Author: Admin9705

frontend/static/js/user.js

@@ -371,13 +371,15 @@ class UserModule {
                     document.getElementById('plexLinkStatus').textContent = 'Linking account...';
 
                     try {
+                        // Use the same approach as setup - let backend get username from database
                         const linkResponse = await fetch('./api/auth/plex/link', {
                             method: 'POST',
                             headers: {
                                 'Content-Type': 'application/json'
                             },
                             body: JSON.stringify({
-                                token: result.token
+                                token: result.token,
+                                setup_mode: true  // Use setup mode like the working implementation
                             })
                         });
 

frontend/templates/login.html

@@ -617,7 +617,7 @@ <h2>Account Recovery</h2>
 
                 if (status === 200 && body.success) {
                     // Login successful
-                                                window.location.href = body.redirect || './';
+                    window.location.href = body.redirect || './';
                 } else if (status === 401 && requires2FA) {
                     // 2FA is required
                     console.log('2FA required, showing 2FA input field');
@@ -734,8 +734,8 @@ <h2>Account Recovery</h2>
             setPlexStatus('waiting', '<i class="fas fa-spinner spinner"></i> Creating Plex PIN...');
 
             // Create Plex PIN
-                                HuntarrUtils.fetchWithTimeout('./api/auth/plex/pin', {
-                        method: 'POST',
+            HuntarrUtils.fetchWithTimeout('./api/auth/plex/pin', {
+                method: 'POST',
                 headers: {
                     'Content-Type': 'application/json',
                 },
@@ -855,7 +855,7 @@ <h2>Account Recovery</h2>
                 if (data.success) {
                     setPlexStatus('success', '<i class="fas fa-check"></i> Login successful! Redirecting...');
                     setTimeout(() => {
-                        window.location.href = './';
+                        window.location.href = data.redirect || './';
                     }, 1500);
                 } else {
                     if (status === 409) {

src/primary/routes/plex_auth_routes.py

@@ -195,7 +195,8 @@ def handle_oauth_callback():
                         return jsonify({
                             'success': True,
                             'message': 'Login successful',
-                            'user': plex_user_data
+                            'user': plex_user_data,
+                            'redirect': './'
                         })
                     else:
                         return jsonify({
@@ -246,7 +247,8 @@ def plex_login():
                 response = jsonify({
                     'success': True,
                     'message': 'Plex user created and logged in successfully',
-                    'auth_type': 'plex'
+                    'auth_type': 'plex',
+                    'redirect': './'
                 })
                 session[SESSION_COOKIE_NAME] = session_id  # Store in Flask session
                 response.set_cookie(SESSION_COOKIE_NAME, session_id, 
@@ -277,7 +279,8 @@ def plex_login():
                     response = jsonify({
                         'success': True,
                         'message': 'Logged in with Plex successfully',
-                        'auth_type': 'plex'
+                        'auth_type': 'plex',
+                        'redirect': './'
                     })
                     session[SESSION_COOKIE_NAME] = session_id  # Store in Flask session
                     response.set_cookie(SESSION_COOKIE_NAME, session_id,