style: apply black and isort formatting across entire codebase

- Standardize quote style (single to double quotes)
- Reorder and group imports alphabetically
- Fix line breaks and indentation for consistency
- Apply PEP 8 formatting standards

Also updated Makefile to exclude both venv and .venv from code quality checks.

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

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

models/schema/vendor_theme.py

@@ -3,12 +3,14 @@
 Pydantic schemas for vendor theme operations.
 """
 
-from typing import Dict, Optional, List
+from typing import Dict, List, Optional
+
 from pydantic import BaseModel, Field
 
 
 class VendorThemeColors(BaseModel):
     """Color scheme for vendor theme."""
+
     primary: Optional[str] = Field(None, description="Primary brand color")
     secondary: Optional[str] = Field(None, description="Secondary color")
     accent: Optional[str] = Field(None, description="Accent/CTA color")
@@ -19,12 +21,14 @@ class VendorThemeColors(BaseModel):
 
 class VendorThemeFonts(BaseModel):
     """Typography settings for vendor theme."""
+
     heading: Optional[str] = Field(None, description="Font for headings")
     body: Optional[str] = Field(None, description="Font for body text")
 
 
 class VendorThemeBranding(BaseModel):
     """Branding assets for vendor theme."""
+
     logo: Optional[str] = Field(None, description="Logo URL")
     logo_dark: Optional[str] = Field(None, description="Dark mode logo URL")
     favicon: Optional[str] = Field(None, description="Favicon URL")
@@ -33,36 +37,54 @@ class VendorThemeBranding(BaseModel):
 
 class VendorThemeLayout(BaseModel):
     """Layout settings for vendor theme."""
-    style: Optional[str] = Field(None, description="Product layout style (grid, list, masonry)")
-    header: Optional[str] = Field(None, description="Header style (fixed, static, transparent)")
-    product_card: Optional[str] = Field(None, description="Product card style (modern, classic, minimal)")
+
+    style: Optional[str] = Field(
+        None, description="Product layout style (grid, list, masonry)"
+    )
+    header: Optional[str] = Field(
+        None, description="Header style (fixed, static, transparent)"
+    )
+    product_card: Optional[str] = Field(
+        None, description="Product card style (modern, classic, minimal)"
+    )
 
 
 class VendorThemeUpdate(BaseModel):
     """Schema for updating vendor theme (partial updates allowed)."""
+
     theme_name: Optional[str] = Field(None, description="Theme preset name")
     colors: Optional[Dict[str, str]] = Field(None, description="Color scheme")
     fonts: Optional[Dict[str, str]] = Field(None, description="Font settings")
-    branding: Optional[Dict[str, Optional[str]]] = Field(None, description="Branding assets")
+    branding: Optional[Dict[str, Optional[str]]] = Field(
+        None, description="Branding assets"
+    )
     layout: Optional[Dict[str, str]] = Field(None, description="Layout settings")
     custom_css: Optional[str] = Field(None, description="Custom CSS rules")
-    social_links: Optional[Dict[str, str]] = Field(None, description="Social media links")
+    social_links: Optional[Dict[str, str]] = Field(
+        None, description="Social media links"
+    )
 
 
 class VendorThemeResponse(BaseModel):
     """Schema for vendor theme response."""
+
     theme_name: str = Field(..., description="Theme name")
     colors: Dict[str, str] = Field(..., description="Color scheme")
     fonts: Dict[str, str] = Field(..., description="Font settings")
     branding: Dict[str, Optional[str]] = Field(..., description="Branding assets")
     layout: Dict[str, str] = Field(..., description="Layout settings")
-    social_links: Optional[Dict[str, str]] = Field(default_factory=dict, description="Social links")
+    social_links: Optional[Dict[str, str]] = Field(
+        default_factory=dict, description="Social links"
+    )
     custom_css: Optional[str] = Field(None, description="Custom CSS")
-    css_variables: Optional[Dict[str, str]] = Field(None, description="CSS custom properties")
+    css_variables: Optional[Dict[str, str]] = Field(
+        None, description="CSS custom properties"
+    )
 
 
 class ThemePresetPreview(BaseModel):
     """Preview information for a theme preset."""
+
     name: str = Field(..., description="Preset name")
     description: str = Field(..., description="Preset description")
     primary_color: str = Field(..., description="Primary color")
@@ -75,10 +97,12 @@ class ThemePresetPreview(BaseModel):
 
 class ThemePresetResponse(BaseModel):
     """Response after applying a preset."""
+
     message: str = Field(..., description="Success message")
     theme: VendorThemeResponse = Field(..., description="Applied theme")
 
 
 class ThemePresetListResponse(BaseModel):
     """List of available theme presets."""
+
     presets: List[ThemePresetPreview] = Field(..., description="Available presets")