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/schemas/receipt.py

@@ -74,6 +74,12 @@ class TvaEntrySchema(BaseModel):
     amount: Decimal = Field(description="TVA amount for this rate")
 
 
+class PaymentMethodSchema(BaseModel):
+    """Payment method entry (CARD/NUMERAR)."""
+    method: str = Field(description="Payment method: CARD or NUMERAR")
+    amount: Decimal = Field(description="Amount paid with this method")
+
+
 # ============ Receipt Schemas ============
 
 class ReceiptBase(BaseModel):
@@ -93,11 +99,15 @@ class ReceiptBase(BaseModel):
     # Other fields
     expense_type_code: Optional[str] = Field(default=None, max_length=20)
     company_id: int
-    partner_id: Optional[int] = None
+    # partner_id removed - supplier data is text-only (partner_name, cui)
     partner_name: Optional[str] = Field(default=None, max_length=200)
+    cui: Optional[str] = Field(default=None, max_length=20, description="Fiscal code (CUI) from OCR")
+    ocr_raw_text: Optional[str] = Field(default=None, description="Raw OCR text for debugging")
+    payment_methods: Optional[List[PaymentMethodSchema]] = Field(default=None, description="Payment methods from OCR")
     cash_register_id: Optional[int] = None
     cash_register_name: Optional[str] = Field(default=None, max_length=100)
     cash_register_account: Optional[str] = Field(default=None, max_length=20)
+    payment_mode: Optional[str] = Field(default=None, description="Payment mode: casa/banca/avans_decontare")
 
 
 class ReceiptCreate(ReceiptBase):
@@ -121,11 +131,15 @@ class ReceiptUpdate(BaseModel):
     vendor_address: Optional[str] = Field(default=None, max_length=500, description="Vendor address")
     # Other fields
     expense_type_code: Optional[str] = Field(default=None, max_length=20)
-    partner_id: Optional[int] = None
+    # partner_id removed - supplier data is text-only (partner_name, cui)
     partner_name: Optional[str] = Field(default=None, max_length=200)
+    cui: Optional[str] = Field(default=None, max_length=20, description="Fiscal code (CUI) from OCR")
+    ocr_raw_text: Optional[str] = Field(default=None, description="Raw OCR text for debugging")
+    payment_methods: Optional[List[PaymentMethodSchema]] = Field(default=None, description="Payment methods from OCR")
     cash_register_id: Optional[int] = None
     cash_register_name: Optional[str] = Field(default=None, max_length=100)
     cash_register_account: Optional[str] = Field(default=None, max_length=20)
+    payment_mode: Optional[str] = Field(default=None, description="Payment mode: casa/banca/avans_decontare")
 
 
 class ReceiptResponse(ReceiptBase):
@@ -164,6 +178,21 @@ class ReceiptResponse(ReceiptBase):
             return v
         return None
 
+    @field_validator('payment_methods', mode='before')
+    @classmethod
+    def parse_payment_methods(cls, v: Any) -> Optional[List[dict]]:
+        """Deserialize payment_methods from JSON string if needed."""
+        if v is None:
+            return None
+        if isinstance(v, str):
+            try:
+                return json.loads(v)
+            except (json.JSONDecodeError, TypeError):
+                return None
+        if isinstance(v, list):
+            return v
+        return None
+
 
 class ReceiptListResponse(BaseModel):
     """Schema for paginated receipt list response."""
@@ -208,10 +237,11 @@ class EntriesUpdateRequest(BaseModel):
 # ============ Nomenclature Schemas ============
 
 class PartnerOption(BaseModel):
-    """Schema for partner dropdown option."""
-    id: int
+    """Schema for partner dropdown option (used for autocomplete assistance)."""
     name: str
-    code: Optional[str] = None
+    fiscal_code: Optional[str] = None
+    address: Optional[str] = None
+    source: str = "oracle"  # 'oracle' (synced) or 'local'
 
 
 class AccountOption(BaseModel):