Fix browser source audio control for individual stream management

- Enable "Control audio via OBS" checkbox on browser sources using reroute_audio: true
- Remove redundant separate audio capture sources (_audio suffixed sources)
- Browser sources now properly route audio through OBS for individual mute/unmute control
- Preserve URL settings in all SetInputSettings calls to prevent URL clearing
- Simplify audio management - no more duplicate audio sources cluttering OBS

This allows users to mute/unmute individual Twitch streams directly in OBS without
having to manually mute each stream in the browser or deal with separate audio sources.

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

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

lib/obsClient.js

@@ -392,6 +392,8 @@ async function createStreamGroup(groupName, streamName, teamName, url) {
     const browserSourceExists = inputs.some(input => input.inputName === sourceName);
     
     if (!browserSourceExists) {
+      // Create browser source with detailed audio control settings
+      console.log(`Creating browser source "${sourceName}" with URL: ${url}`);
       await obsClient.call('CreateInput', {
         sceneName: streamGroupName, // Create in the nested scene
         inputName: sourceName,
@@ -400,20 +402,46 @@ async function createStreamGroup(groupName, streamName, teamName, url) {
           width: 1920,
           height: 1080,
           url,
-          control_audio: true,
+          control_audio: true, // Enable audio control so OBS can mute the browser source
+          restart_when_active: false,
+          shutdown: false,
+          // Try additional audio-related settings
+          reroute_audio: true,
+          audio_monitoring_type: 0 // Monitor Off
         },
       });
-      console.log(`Created browser source "${sourceName}" in nested scene`);
+      console.log(`Created browser source "${sourceName}" in nested scene with URL: ${url}`);
       
-      // Mute the audio stream for the browser source
+      // Apply additional settings after creation to ensure they stick
+      try {
+        await obsClient.call('SetInputSettings', {
+          inputName: sourceName,
+          inputSettings: {
+            width: 1920,
+            height: 1080,
+            url, // Make sure URL is preserved
+            control_audio: true,
+            reroute_audio: true,
+            restart_when_active: false,
+            shutdown: false,
+            audio_monitoring_type: 0
+          },
+          overlay: false // Don't overlay, replace all settings
+        });
+        console.log(`Applied complete settings to "${sourceName}" with URL: ${url}`);
+      } catch (settingsError) {
+        console.error(`Failed to apply settings to "${sourceName}":`, settingsError.message);
+      }
+      
+      // Mute the browser source audio by default (can be unmuted individually in OBS)
       try {
         await obsClient.call('SetInputMute', {
           inputName: sourceName,
           inputMuted: true
         });
-        console.log(`Muted audio for browser source "${sourceName}"`);
+        console.log(`Muted browser source audio for "${sourceName}" (can be unmuted in OBS for individual control)`);
       } catch (muteError) {
-        console.error(`Failed to mute audio for "${sourceName}":`, muteError.message);
+        console.error(`Failed to mute browser source audio for "${sourceName}":`, muteError.message);
       }
     } else {
       // Add existing source to nested scene
@@ -421,16 +449,32 @@ async function createStreamGroup(groupName, streamName, teamName, url) {
         sceneName: streamGroupName,
         sourceName: sourceName
       });
+      console.log(`Added existing browser source "${sourceName}" to nested scene`);
       
-      // Ensure audio is muted for existing source too
+      // Ensure existing browser source has audio control enabled and correct URL
       try {
+        await obsClient.call('SetInputSettings', {
+          inputName: sourceName,
+          inputSettings: {
+            width: 1920,
+            height: 1080,
+            url, // Update URL in case it changed
+            control_audio: true,
+            reroute_audio: true,
+            restart_when_active: false,
+            shutdown: false,
+            audio_monitoring_type: 0
+          },
+          overlay: false // Replace settings, don't overlay
+        });
+        
         await obsClient.call('SetInputMute', {
           inputName: sourceName,
           inputMuted: true
         });
-        console.log(`Ensured audio is muted for existing browser source "${sourceName}"`);
+        console.log(`Updated existing browser source "${sourceName}" with URL: ${url} and enabled audio control`);
-      } catch (muteError) {
+      } catch (settingsError) {
-        console.error(`Failed to mute audio for existing source "${sourceName}":`, muteError.message);
+        console.error(`Failed to update settings for existing source "${sourceName}":`, settingsError.message);
       }
     }
     
@@ -614,7 +658,7 @@ async function deleteStreamComponents(streamName, teamName, groupName) {
       console.log(`Nested scene "${streamGroupName}" not found:`, error.message);
     }
     
-    // 3. Remove the browser source (if it's not used elsewhere)
+    // 3. Remove the browser source
     try {
       const { inputs } = await obsClient.call('GetInputList');
       const browserSource = inputs.find(input => input.inputName === sourceName);