feat(notifications): webhook custom headers (#2230)

Signed-off-by: 0xsysr3ll <0xsysr3ll@pm.me>

server/lib/notifications/agents/webhook.ts

@@ -196,16 +196,36 @@ class WebhookAgent
     }
 
     try {
+      const headers: Record<string, string> = {};
+
+      if (settings.options.authHeader) {
+        headers.Authorization = settings.options.authHeader;
+      }
+
+      if (
+        settings.options.customHeaders &&
+        settings.options.customHeaders.length > 0
+      ) {
+        settings.options.customHeaders.forEach((header) => {
+          const key = header.key?.trim();
+          const value = header.value?.trim();
+
+          if (key && value) {
+            // Don't override Authorization header if it's already set via authHeader
+            if (
+              key.toLowerCase() !== 'authorization' ||
+              !settings.options.authHeader
+            ) {
+              headers[key] = value;
+            }
+          }
+        });
+      }
+
       await axios.post(
         webhookUrl,
         this.buildPayload(type, payload),
-        settings.options.authHeader
-          ? {
-              headers: {
-                Authorization: settings.options.authHeader,
-              },
-            }
-          : undefined
+        Object.keys(headers).length > 0 ? { headers } : undefined
       );
 
       return true;

server/lib/settings/index.ts

@@ -277,6 +277,7 @@ export interface NotificationAgentWebhook extends NotificationAgentConfig {
     webhookUrl: string;
     jsonPayload: string;
     authHeader?: string;
+    customHeaders?: { key: string; value: string }[];
     supportVariables?: boolean;
   };
 }