feat: add import error tracking and translation tabs

Import Error Tracking:
- Add MarketplaceImportError model to store detailed error information
- Store row number, identifier, error type, message, and row data for each error
- Add API endpoint GET /admin/marketplace-import-jobs/{job_id}/errors
- Add UI to view and browse import errors in job details modal
- Support pagination and error type filtering

Translation Tabs:
- Replace flat translation list with tabbed interface on product detail page
- Add language tabs with full language names
- Add copy-to-clipboard functionality for translation content
- Improved UX with better visual separation of translations

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

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

models/database/__init__.py

@@ -20,7 +20,7 @@ from .company import Company
 from .content_page import ContentPage
 from .customer import Customer, CustomerAddress
 from .inventory import Inventory
-from .marketplace_import_job import MarketplaceImportJob
+from .marketplace_import_job import MarketplaceImportError, MarketplaceImportJob
 from .marketplace_product import (
     DigitalDeliveryMethod,
     MarketplaceProduct,
@@ -83,6 +83,7 @@ __all__ = [
     "ProductTranslation",
     # Import
     "MarketplaceImportJob",
+    "MarketplaceImportError",
     # Inventory
     "Inventory",
     # Orders

models/database/marketplace_import_job.py

@@ -1,10 +1,59 @@
-from sqlalchemy import Column, DateTime, ForeignKey, Index, Integer, String, Text
+from sqlalchemy import JSON, Column, DateTime, ForeignKey, Index, Integer, String, Text
 from sqlalchemy.orm import relationship
 
 from app.core.database import Base
 from models.database.base import TimestampMixin
 
 
+class MarketplaceImportError(Base, TimestampMixin):
+    """
+    Stores detailed information about individual import errors.
+
+    Each row that fails during import creates an error record with:
+    - Row number from the source file
+    - Identifier (marketplace_product_id if available)
+    - Error type and message
+    - Raw row data for review
+    """
+
+    __tablename__ = "marketplace_import_errors"
+
+    id = Column(Integer, primary_key=True, index=True)
+    import_job_id = Column(
+        Integer,
+        ForeignKey("marketplace_import_jobs.id", ondelete="CASCADE"),
+        nullable=False,
+        index=True,
+    )
+
+    # Error location
+    row_number = Column(Integer, nullable=False)
+
+    # Identifier from the row (if available)
+    identifier = Column(String)  # marketplace_product_id, gtin, mpn, etc.
+
+    # Error details
+    error_type = Column(String(50), nullable=False)  # missing_title, missing_id, parse_error, etc.
+    error_message = Column(Text, nullable=False)
+
+    # Raw row data for review (JSON)
+    row_data = Column(JSON)
+
+    # Relationship
+    import_job = relationship("MarketplaceImportJob", back_populates="errors")
+
+    __table_args__ = (
+        Index("idx_import_error_job_id", "import_job_id"),
+        Index("idx_import_error_type", "error_type"),
+    )
+
+    def __repr__(self):
+        return (
+            f"<MarketplaceImportError(id={self.id}, job_id={self.import_job_id}, "
+            f"row={self.row_number}, type='{self.error_type}')>"
+        )
+
+
 class MarketplaceImportJob(Base, TimestampMixin):
     __tablename__ = "marketplace_import_jobs"
 
@@ -37,6 +86,12 @@ class MarketplaceImportJob(Base, TimestampMixin):
     # Relationships
     vendor = relationship("Vendor", back_populates="marketplace_import_jobs")
     user = relationship("User", foreign_keys=[user_id])
+    errors = relationship(
+        "MarketplaceImportError",
+        back_populates="import_job",
+        cascade="all, delete-orphan",
+        order_by="MarketplaceImportError.row_number",
+    )
 
     # Indexes for performance
     __table_args__ = (