added product import and billing integration

lib/presentation/payment/providers/payment_controller.dart

@@ -4,7 +4,6 @@ import 'package:flutter_riverpod/flutter_riverpod.dart';
 
 import '../../../app/providers.dart';
 import '../../../core/utils/extensions.dart';
-import '../../../data/sync/sync_engine.dart';
 import '../../../domain/entities/transaction.dart';
 import '../../../domain/usecases/checkout_sale.dart';
 import '../../auth/providers/auth_controller.dart';
@@ -80,29 +79,27 @@ class PaymentController extends StateNotifier<PaymentState> {
 
   /// Whether Complete Sale should be enabled.
   ///
-  /// Cash is the strict case: the drawer cannot be reconciled and no change can
-  /// be calculated unless the cashier states what was handed over. Card, UPI
-  /// and wallet settle on the external terminal, so they need no amount here.
+  /// Every method now requires the cashier to state what was actually
+  /// received before the sale can complete — a tap on Exact for the common
+  /// case, or a typed amount for a partial tender. `cashTendered` is the
+  /// amount entered for whichever method is currently active, not literally
+  /// cash; the name stayed to keep this change out of the rest of the app.
   bool get canConfirm {
     if (_billTotal <= 0) return false;
 
     // Staged splits already cover the bill.
     if (balanceDue <= 0.01) return true;
 
-    if (state.activeMethod.needsChange) {
-      return state.cashTendered >= balanceDue;
-    }
-    return true;
+    return state.cashTendered >= balanceDue;
   }
 
   /// Why the button is disabled, for display next to it.
   String? get blockedReason {
     if (_billTotal <= 0) return 'Add at least one item before charging.';
     if (canConfirm) return null;
-    if (state.activeMethod.needsChange) {
-      return 'Enter the cash received, or tap Exact.';
-    }
-    return null;
+    return state.activeMethod.needsChange
+        ? 'Enter the cash received, or tap Exact.'
+        : 'Enter the amount received, or tap Exact.';
   }
 
   void selectMethod(PaymentMethod method) {
@@ -212,10 +209,11 @@ class PaymentController extends StateNotifier<PaymentState> {
       _ref.invalidate(visibleProductsProvider);
       _ref.read(orderVersionProvider.notifier).state++;
 
-      // The bill is safely on disk; getting it to the back office is the
-      // engine's problem now. Deliberately not awaited — the cashier must
-      // reach the receipt screen at network speed of zero.
-      _ref.read(syncEngineProvider).nudge(SyncTrigger.saleCommitted);
+      // Deliberately NOT nudging the sync engine here. The bill sits on this
+      // terminal, unsynced, until the receipt screen's cancellation window
+      // closes — either it is pressed past early with New Sale, or the
+      // window runs out — or the sale is voided if the cashier cancels
+      // instead. See ReceiptScreen.
 
       return result;
     } on CheckoutFailure catch (e) {

lib/presentation/payment/screens/payment_screen.dart

@@ -350,20 +350,41 @@ class _PaymentScreenState extends ConsumerState<PaymentScreen> {
     return GlassCard(
       padding: const EdgeInsets.all(AppSpacing.lg),
       radius: AppRadius.xl,
-      child: state.activeMethod.needsChange
-          ? _cashTender(controller)
-          : _referenceTender(controller, state),
+      child: _amountTender(controller, state),
     );
   }
 
-  Widget _cashTender(PaymentController controller) {
+  /// Amount entry for whichever method is active. Every method works the
+  /// same way now — a keypad, an Exact shortcut, and an explicit amount —
+  /// rather than cash alone asking what was received while card/UPI/wallet
+  /// silently assumed the full balance. Cash additionally gets denomination
+  /// chips and a change-due row, since only cash can be over-tendered; a
+  /// method that captures a reference (card, UPI, gift card) additionally
+  /// gets that field below the keypad.
+  Widget _amountTender(PaymentController controller, PaymentState state) {
+    final cash = state.activeMethod.needsChange;
+
     return Column(
       crossAxisAlignment: CrossAxisAlignment.stretch,
       mainAxisSize: MainAxisSize.min,
       children: [
-        const Text(
-          'Cash received',
-          style: TextStyle(fontSize: 15, fontWeight: FontWeight.w600),
+        Row(
+          children: [
+            Text(state.activeMethod.emoji, style: const TextStyle(fontSize: 20)),
+            const SizedBox(width: AppSpacing.sm),
+            Expanded(
+              child: Text(
+                cash
+                    ? 'Cash received'
+                    : '${state.activeMethod.label} amount received',
+                overflow: TextOverflow.ellipsis,
+                style: const TextStyle(
+                  fontSize: 15,
+                  fontWeight: FontWeight.w600,
+                ),
+              ),
+            ),
+          ],
         ),
         const SizedBox(height: AppSpacing.md),
         Container(
@@ -405,16 +426,20 @@ class _PaymentScreenState extends ConsumerState<PaymentScreen> {
               label: const Text('Exact'),
               onPressed: () => _setCash(controller.balanceDue),
             ),
-            for (final note in const [50, 100, 200, 500, 2000])
-              ActionChip(
-                label: Text('₹$note'),
-                onPressed: () =>
-                    _setCash((double.tryParse(_cashBuffer) ?? 0) + note),
-              ),
+            // Denomination shortcuts only make sense for physical notes.
+            if (cash)
+              for (final note in const [50, 100, 200, 500, 2000])
+                ActionChip(
+                  label: Text('₹$note'),
+                  onPressed: () =>
+                      _setCash((double.tryParse(_cashBuffer) ?? 0) + note),
+                ),
           ],
         ),
-        const SizedBox(height: AppSpacing.md),
-        _changeRow(controller.changeDue),
+        if (cash) ...[
+          const SizedBox(height: AppSpacing.md),
+          _changeRow(controller.changeDue),
+        ],
         const SizedBox(height: AppSpacing.md),
         Center(
           child: NumericKeypad(
@@ -424,6 +449,21 @@ class _PaymentScreenState extends ConsumerState<PaymentScreen> {
             onBackspace: _backspaceCash,
           ),
         ),
+        if (state.activeMethod.needsReference) ...[
+          const SizedBox(height: AppSpacing.md),
+          TextField(
+            onChanged: controller.setReference,
+            decoration: InputDecoration(
+              labelText: switch (state.activeMethod) {
+                PaymentMethod.card => 'Approval code',
+                PaymentMethod.upi => 'UPI transaction ID',
+                PaymentMethod.giftCard => 'Gift card number',
+                _ => 'Reference',
+              },
+              prefixIcon: const Icon(Icons.tag_rounded),
+            ),
+          ),
+        ],
         const SizedBox(height: AppSpacing.md),
         _splitButton(controller, amount: double.tryParse(_cashBuffer) ?? 0),
       ],
@@ -473,71 +513,6 @@ class _PaymentScreenState extends ConsumerState<PaymentScreen> {
     );
   }
 
-  Widget _referenceTender(PaymentController controller, PaymentState state) {
-    return Column(
-      crossAxisAlignment: CrossAxisAlignment.stretch,
-      mainAxisSize: MainAxisSize.min,
-      children: [
-        Row(
-          children: [
-            Text(state.activeMethod.emoji,
-                style: const TextStyle(fontSize: 20),),
-            const SizedBox(width: AppSpacing.sm),
-            Expanded(
-              child: Text(
-                '${state.activeMethod.label} payment',
-                overflow: TextOverflow.ellipsis,
-                style:
-                    const TextStyle(fontSize: 15, fontWeight: FontWeight.w600),
-              ),
-            ),
-          ],
-        ),
-        const SizedBox(height: AppSpacing.xxl),
-        Center(
-          child: Container(
-            width: 104,
-            height: 104,
-            decoration: const BoxDecoration(
-              color: AppColors.primarySurface,
-              borderRadius: AppRadius.brXl,
-            ),
-            alignment: Alignment.center,
-            child: Text(state.activeMethod.emoji,
-                style: const TextStyle(fontSize: 46),),
-          ),
-        ),
-        const SizedBox(height: AppSpacing.lg),
-        Text(
-          'Charge ${Formatters.money(controller.balanceDue)} on the '
-          '${state.activeMethod.label.toLowerCase()} terminal',
-          textAlign: TextAlign.center,
-          style: const TextStyle(
-            fontSize: 13.5,
-            color: AppColors.textSecondary,
-            height: 1.5,
-          ),
-        ),
-        const SizedBox(height: AppSpacing.xxl),
-        if (state.activeMethod.needsReference)
-          TextField(
-            onChanged: controller.setReference,
-            decoration: InputDecoration(
-              labelText: switch (state.activeMethod) {
-                PaymentMethod.card => 'Approval code',
-                PaymentMethod.upi => 'UPI transaction ID',
-                PaymentMethod.giftCard => 'Gift card number',
-                _ => 'Reference',
-              },
-              prefixIcon: const Icon(Icons.tag_rounded),
-            ),
-          ),
-        const SizedBox(height: AppSpacing.lg),
-        _splitButton(controller),
-      ],
-    );
-  }
-
   Widget _splitButton(PaymentController controller, {double? amount}) {
     return OutlinedButton.icon(
       onPressed: controller.balanceDue > 0
@@ -622,18 +597,17 @@ class _PaymentScreenState extends ConsumerState<PaymentScreen> {
                         ),
                       ),
                     ),
-                    if (state.activeMethod.needsChange)
-                      TextButton(
-                        onPressed: () => _setCash(controller.balanceDue),
-                        style: TextButton.styleFrom(
-                          minimumSize: const Size(0, 30),
-                          padding: const EdgeInsets.symmetric(
-                            horizontal: AppSpacing.md,
-                          ),
+                    TextButton(
+                      onPressed: () => _setCash(controller.balanceDue),
+                      style: TextButton.styleFrom(
+                        minimumSize: const Size(0, 30),
+                        padding: const EdgeInsets.symmetric(
+                          horizontal: AppSpacing.md,
                         ),
-                        child: const Text('Exact',
-                            style: TextStyle(fontSize: 12.5),),
                       ),
+                      child: const Text('Exact',
+                          style: TextStyle(fontSize: 12.5),),
+                    ),
                   ],
                 ),
               ),