Add support for merging video and chat with configurable layout options

config/global.json.example

@@ -9,6 +9,8 @@
   "downloadVOD": true,
   "downloadCHAT": true,
   "downloadLiveCHAT": true,
+  "mergeVideoChat": true,
+  "mergeChatLayout": "side-by-side",
   "vodTimeout": 300,
   "uploadCloud": true,
   "deleteFiles": false,

config/global.schema.json

@@ -52,6 +52,17 @@
       "default": true,
       "description": "Download chat during live stream: false = disabled, true = enabled"
     },
+    "mergeVideoChat": {
+      "type": "boolean",
+      "default": true,
+      "description": "Merge video and chat into a single file: false = disabled, true = enabled"
+    },
+    "mergeChatLayout": {
+      "type": "string",
+      "enum": ["side-by-side", "overlay"],
+      "default": "side-by-side",
+      "description": "Chat merge layout: side-by-side (video + chat horizontally) or overlay (chat overlaid on video)"
+    },
     "vodTimeout": {
       "type": "integer",
       "default": 300,