feat: implement product search, media library, and vendor customers

- Add full-text product search in ProductService.search_products()
  searching titles, descriptions, SKUs, brands, and GTINs
- Implement complete vendor media library with file uploads,
  thumbnails, folders, and product associations
- Implement vendor customers API with listing, details, orders,
  statistics, and status management
- Add shop search results UI with pagination and add-to-cart
- Add vendor media library UI with drag-drop upload and grid view
- Add database migration for media_files and product_media tables
- Update TODO file with current launch status (~95% complete)

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

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

alembic/versions/w1b2c3d4e5f6_add_media_library_tables.py

@@ -0,0 +1,108 @@
+"""Add media library tables
+
+Revision ID: w1b2c3d4e5f6
+Revises: v0a1b2c3d4e5
+Create Date: 2026-01-06 10:00:00.000000
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+
+# revision identifiers, used by Alembic.
+revision: str = "w1b2c3d4e5f6"
+down_revision: Union[str, None] = "v0a1b2c3d4e5"
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    # Create media_files table
+    op.create_table(
+        "media_files",
+        sa.Column("id", sa.Integer(), primary_key=True, index=True),
+        sa.Column("vendor_id", sa.Integer(), sa.ForeignKey("vendors.id"), nullable=False),
+        # File identification
+        sa.Column("filename", sa.String(255), nullable=False),
+        sa.Column("original_filename", sa.String(255)),
+        sa.Column("file_path", sa.String(500), nullable=False),
+        # File properties
+        sa.Column("media_type", sa.String(20), nullable=False),  # image, video, document
+        sa.Column("mime_type", sa.String(100)),
+        sa.Column("file_size", sa.Integer()),
+        # Image/video dimensions
+        sa.Column("width", sa.Integer()),
+        sa.Column("height", sa.Integer()),
+        # Thumbnail
+        sa.Column("thumbnail_path", sa.String(500)),
+        # Metadata
+        sa.Column("alt_text", sa.String(500)),
+        sa.Column("description", sa.Text()),
+        sa.Column("folder", sa.String(100), default="general"),
+        sa.Column("tags", sa.JSON()),
+        sa.Column("extra_metadata", sa.JSON()),
+        # Status
+        sa.Column("is_optimized", sa.Boolean(), default=False),
+        sa.Column("optimized_size", sa.Integer()),
+        # Usage tracking
+        sa.Column("usage_count", sa.Integer(), default=0),
+        # Timestamps
+        sa.Column("created_at", sa.DateTime(), server_default=sa.func.now()),
+        sa.Column("updated_at", sa.DateTime(), onupdate=sa.func.now()),
+    )
+
+    # Create indexes for media_files
+    op.create_index("idx_media_vendor_id", "media_files", ["vendor_id"])
+    op.create_index("idx_media_vendor_folder", "media_files", ["vendor_id", "folder"])
+    op.create_index("idx_media_vendor_type", "media_files", ["vendor_id", "media_type"])
+    op.create_index("idx_media_filename", "media_files", ["filename"])
+
+    # Create product_media table (many-to-many relationship)
+    op.create_table(
+        "product_media",
+        sa.Column("id", sa.Integer(), primary_key=True, index=True),
+        sa.Column(
+            "product_id",
+            sa.Integer(),
+            sa.ForeignKey("products.id", ondelete="CASCADE"),
+            nullable=False,
+        ),
+        sa.Column(
+            "media_id",
+            sa.Integer(),
+            sa.ForeignKey("media_files.id", ondelete="CASCADE"),
+            nullable=False,
+        ),
+        # Usage type
+        sa.Column("usage_type", sa.String(50), nullable=False, default="gallery"),
+        # Display order for galleries
+        sa.Column("display_order", sa.Integer(), default=0),
+        # Variant-specific
+        sa.Column("variant_id", sa.Integer()),
+        # Timestamps
+        sa.Column("created_at", sa.DateTime(), server_default=sa.func.now()),
+        sa.Column("updated_at", sa.DateTime(), onupdate=sa.func.now()),
+        # Unique constraint
+        sa.UniqueConstraint("product_id", "media_id", "usage_type", name="uq_product_media_usage"),
+    )
+
+    # Create indexes for product_media
+    op.create_index("idx_product_media_product", "product_media", ["product_id"])
+    op.create_index("idx_product_media_media", "product_media", ["media_id"])
+    # Note: Unique constraint is defined in the table creation above via SQLAlchemy model
+    # SQLite doesn't support adding constraints after table creation
+
+
+def downgrade() -> None:
+    # Drop product_media table
+    op.drop_index("idx_product_media_media", table_name="product_media")
+    op.drop_index("idx_product_media_product", table_name="product_media")
+    op.drop_table("product_media")
+
+    # Drop media_files table
+    op.drop_index("idx_media_filename", table_name="media_files")
+    op.drop_index("idx_media_vendor_type", table_name="media_files")
+    op.drop_index("idx_media_vendor_folder", table_name="media_files")
+    op.drop_index("idx_media_vendor_id", table_name="media_files")
+    op.drop_table("media_files")