feat: Add payment methods extraction, OCR improvements, and AutoComplete fix

Backend:
- Add payment_methods and payment_mode fields to Receipt model
- Add payment method extraction (CARD/NUMERAR) with auto-suggestion logic
- Improve OCR service with TVA validation and reverse calculation
- Fix nomenclature service supplier limit (was 50, now unlimited)
- Add OCR fields migrations (ocr_raw_text, ocr_confidence, payment_mode)

Frontend:
- Fix AutoComplete to properly display supplier name after OCR
- Add payment methods display in OCR preview with suggested payment mode
- Improve ReceiptCreateView form handling and OCR data application

Database migrations:
- 20251215_add_ocr_fields_to_receipt.py
- 20251215_remove_partner_id.py
- 20251216_add_payment_mode.py

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

data-entry-app/backend/app/services/receipt_service.py

@@ -20,6 +20,14 @@ from app.schemas.receipt import (
 from app.services.expense_types import EXPENSE_TYPES, get_expense_type
 
 
+# Payment mode to accounting account mapping
+PAYMENT_MODE_ACCOUNTS = {
+    'casa': ('5311', 'Casa in lei'),
+    'banca': ('5121', 'Conturi la banci in lei'),
+    'avans_decontare': ('542', 'Avansuri de trezorerie'),
+}
+
+
 class ReceiptService:
     """Service for receipt business logic and workflow."""
 
@@ -151,21 +159,36 @@ class ReceiptService:
                     partner_id=receipt.partner_id,
                 ))
 
-            # Credit: Cash/Bank
-            cash_account = receipt.cash_register_account or "5311"
-            cash_name = receipt.cash_register_name or "Casa in lei"
+            # Credit entry - based on payment_mode (new) or cash_register (legacy)
+            if receipt.payment_mode and receipt.payment_mode in PAYMENT_MODE_ACCOUNTS:
+                credit_account, credit_name = PAYMENT_MODE_ACCOUNTS[receipt.payment_mode]
+            elif receipt.cash_register_account:
+                # Backwards compatibility for existing receipts
+                credit_account = receipt.cash_register_account
+                credit_name = receipt.cash_register_name or "Casa/Banca"
+            else:
+                # Default fallback
+                credit_account = "5311"
+                credit_name = "Casa in lei"
+
             entries.append(AccountingEntryCreate(
                 entry_type=EntryType.CREDIT,
-                account_code=cash_account,
-                account_name=cash_name,
+                account_code=credit_account,
+                account_name=credit_name,
                 amount=amount,
             ))
 
         else:
             # Income: Debit cash/bank, Credit income account
-            # For now, simple income posting
-            cash_account = receipt.cash_register_account or "5311"
-            cash_name = receipt.cash_register_name or "Casa in lei"
+            # Based on payment_mode (new) or cash_register (legacy)
+            if receipt.payment_mode and receipt.payment_mode in PAYMENT_MODE_ACCOUNTS:
+                cash_account, cash_name = PAYMENT_MODE_ACCOUNTS[receipt.payment_mode]
+            elif receipt.cash_register_account:
+                cash_account = receipt.cash_register_account
+                cash_name = receipt.cash_register_name or "Casa/Banca"
+            else:
+                cash_account = "5311"
+                cash_name = "Casa in lei"
 
             # Debit: Cash/Bank
             entries.append(AccountingEntryCreate(
@@ -211,8 +234,9 @@ class ReceiptService:
         if not receipt.expense_type_code:
             return False, "Expense type is required", None
 
-        if not receipt.cash_register_account:
-            return False, "Cash register is required", None
+        # Validate payment_mode or cash_register (backwards compatibility)
+        if not receipt.payment_mode and not receipt.cash_register_account:
+            return False, "Modul de plata este obligatoriu", None
 
         # Generate accounting entries
         entries = ReceiptService.generate_accounting_entries(receipt)
@@ -239,6 +263,7 @@ class ReceiptService:
     ) -> Tuple[bool, str, Optional[Receipt]]:
         """
         Approve receipt (PENDING_REVIEW → APPROVED).
+        Requires valid CUI (fiscal code) for approval.
         """
         receipt = await ReceiptCRUD.get_by_id(session, receipt_id)
 
@@ -248,6 +273,10 @@ class ReceiptService:
         if receipt.status != ReceiptStatus.PENDING_REVIEW:
             return False, "Receipt is not pending review", None
 
+        # Validate CUI is present (required for Oracle import)
+        if not receipt.cui:
+            return False, "Trebuie completat codul fiscal (CUI) pentru aprobare", None
+
         # Validate accounting entries
         if not receipt.entries:
             return False, "Receipt has no accounting entries", None