微信小程序支付遇到问题，因为没有 WX_MCH_PRIVATE_KEY

server/dukang-api/src/common/system-config/system-config.service.ts

@@ -205,17 +205,31 @@ export class SystemConfigService implements OnModuleInit {
     }
   }
 
-  private normalizeByMeta(meta: { type: string }, raw: string): string {
+  private normalizeByMeta(meta: { key?: string; type: string }, raw: string): string {
     if (meta.type === 'boolean') {
       return raw === 'true' || raw === '1' ? 'true' : 'false';
     }
+    if (meta.key === 'WX_MCH_PRIVATE_KEY' || meta.key === 'WX_PLATFORM_CERT') {
+      let value = raw.trim();
+      if (
+        (value.startsWith('"') && value.endsWith('"')) ||
+        (value.startsWith("'") && value.endsWith("'"))
+      ) {
+        value = value.slice(1, -1).trim();
+      }
+      return value.replace(/\\r\\n/g, '\n').replace(/\\n/g, '\n').replace(/\r\n/g, '\n').trim();
+    }
     return raw;
   }
 }
 
 function formatEnvLine(key: string, value: string): string {
-  if (/[\s#"'\\]/.test(value)) {
-    return `${key}="${value.replace(/\\/g, '\\\\').replace(/"/g, '\\"')}"`;
-  }
-  return `${key}=${value}`;
+  const needsQuote = /[\s#"'\\]/.test(value) || value.includes('\n') || value.includes('\r');
+  if (!needsQuote) return `${key}=${value}`;
+  const escaped = value
+    .replace(/\\/g, '\\\\')
+    .replace(/\r\n/g, '\\n')
+    .replace(/\n/g, '\\n')
+    .replace(/"/g, '\\"');
+  return `${key}="${escaped}"`;
 }