Prefer QQAppId/ marker when parsing AppID

Add parseAppidFromMajorV2 to napcat-common to scan a Major file for the "QQAppId/" marker and extract a null-terminated numeric AppID. Update qq-basic-info to import and prefer this new parser (falling back to the existing parseAppidFromMajor). Also correct the getMajorPath argument order when obtaining the major file path. This enables detection of AppID from a newer Major format while preserving legacy fallback behavior.

packages/napcat-common/src/helper.ts

@@ -184,6 +184,35 @@ export function stringifyWithBigInt (obj: any) {
   );
 }
 
+export function parseAppidFromMajorV2 (nodeMajor: string): string | undefined {
+  const marker = Buffer.from('QQAppId/', 'utf-8');
+  const filePath = path.resolve(nodeMajor);
+  const fileContent = fs.readFileSync(filePath);
+
+  let searchPosition = 0;
+  while (true) {
+    const index = fileContent.indexOf(marker, searchPosition);
+    if (index === -1) {
+      break;
+    }
+
+    const start = index + marker.length;
+    const end = fileContent.indexOf(0x00, start);
+    if (end === -1) {
+      break;
+    }
+    const content = fileContent.subarray(start, end);
+    const str = content.toString('utf-8');
+    if (/^\d+$/.test(str)) {
+      return str;
+    }
+
+    searchPosition = end + 1;
+  }
+
+  return undefined;
+}
+
 export function parseAppidFromMajor (nodeMajor: string): string | undefined {
   const hexSequence = 'A4 09 00 00 00 35';
   const sequenceBytes = Buffer.from(hexSequence.replace(/ /g, ''), 'hex');