pos changes

lib/core/config/sync_config.dart

@@ -35,7 +35,6 @@ class SyncConfig {
     this.password,
     this.httpBaseUrl = '',
     this.apiKey,
-    this.sessionToken,
     this.ackTimeout = const Duration(seconds: 20),
     this.batchSize = 50,
   });
@@ -53,38 +52,8 @@ class SyncConfig {
   final String? password;
 
   final String httpBaseUrl;
-
-  /// A static key shared by every terminal at a deployment, if one is set.
-  ///
-  /// Predates sign-in and says nothing about *who* is at the till, so it cannot
-  /// scope a request to an outlet. Kept for deployments that put one in front
-  /// of the endpoint.
   final String? apiKey;
 
-  /// The signed session from `POST /login`, held for the trading day.
-  ///
-  /// Distinct from [apiKey] because the two answer different questions. The key
-  /// says "this request came from our fleet"; the session says "this request
-  /// came from Selvapuram, signed in as Ragul, and may touch that outlet and no
-  /// other". Only the second can stop a till reaching another tenant's books,
-  /// which is why it takes precedence when both are present.
-  final String? sessionToken;
-
-  /// What goes in the Authorization header.
-  ///
-  /// One accessor rather than the same `??` repeated at each call site, because
-  /// the request that forgot it would be the one silently sending no
-  /// credentials at all.
-  String? get bearerToken {
-    final session = sessionToken?.trim();
-    if (session != null && session.isNotEmpty) return session;
-
-    final key = apiKey?.trim();
-    if (key != null && key.isNotEmpty) return key;
-
-    return null;
-  }
-
   /// How long to wait for the back office to confirm a batch before treating
   /// the outcome as unknown and leaving every row pending.
   ///
@@ -179,7 +148,6 @@ class SyncConfig {
     String? password,
     String? httpBaseUrl,
     String? apiKey,
-    String? sessionToken,
     Duration? ackTimeout,
     int? batchSize,
   }) =>
@@ -194,7 +162,6 @@ class SyncConfig {
         password: password ?? this.password,
         httpBaseUrl: httpBaseUrl ?? this.httpBaseUrl,
         apiKey: apiKey ?? this.apiKey,
-        sessionToken: sessionToken ?? this.sessionToken,
         ackTimeout: ackTimeout ?? this.ackTimeout,
         batchSize: batchSize ?? this.batchSize,
       );