fix(watcher): handle wrapped Subject lines in forwarded emails

Update the parseForwardedHeader function to correctly join wrapped Subject lines before the To: line, ensuring accurate parsing of Gmail forwarded messages. Enhance tests to validate this behavior with Tokopedia email examples.

apps/watcher/src/lib/email.js

@@ -13,6 +13,9 @@ export function extractEmail(from) {
 /**
  * Parse a Gmail "Forwarded message" header block from the body.
  * Returns null if no forwarded header is present.
+ *
+ * Subject may wrap onto following lines without leading whitespace
+ * (Gmail plain-text fold), so we read until the To: line.
  */
 export function parseForwardedHeader(body) {
   if (!body) return null;
@@ -22,14 +25,14 @@ export function parseForwardedHeader(body) {
 
   const after = body.slice(idx);
   const headerMatch = after.match(
-    /From:\s*(.+)\r?\nDate:\s*(.+)\r?\nSubject:\s*(.+)\r?\nTo:\s*(.+)/i,
+    /From:\s*(.+)\r?\nDate:\s*(.+)\r?\nSubject:\s*([\s\S]+?)\r?\nTo:\s*(.+)/i,
   );
   if (!headerMatch) return null;
 
   return {
     from: headerMatch[1].trim(),
     date: headerMatch[2].trim(),
-    subject: headerMatch[3].trim(),
+    subject: headerMatch[3].replace(/\s+/g, " ").trim(),
     to: headerMatch[4].trim(),
   };
 }