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>

middleware/theme_context.py

@@ -11,9 +11,10 @@ Class-based middleware provides:
 """
 
 import logging
-from starlette.middleware.base import BaseHTTPMiddleware
+
 from fastapi import Request
 from sqlalchemy.orm import Session
+from starlette.middleware.base import BaseHTTPMiddleware
 
 from app.core.database import get_db
 from models.database.vendor_theme import VendorTheme
@@ -30,10 +31,11 @@ class ThemeContextManager:
         Get theme configuration for vendor.
         Returns default theme if no custom theme is configured.
         """
-        theme = db.query(VendorTheme).filter(
-            VendorTheme.vendor_id == vendor_id,
-            VendorTheme.is_active == True
-        ).first()
+        theme = (
+            db.query(VendorTheme)
+            .filter(VendorTheme.vendor_id == vendor_id, VendorTheme.is_active == True)
+            .first()
+        )
 
         if theme:
             return theme.to_dict()
@@ -52,23 +54,16 @@ class ThemeContextManager:
                 "accent": "#ec4899",
                 "background": "#ffffff",
                 "text": "#1f2937",
-                "border": "#e5e7eb"
-            },
-            "fonts": {
-                "heading": "Inter, sans-serif",
-                "body": "Inter, sans-serif"
+                "border": "#e5e7eb",
             },
+            "fonts": {"heading": "Inter, sans-serif", "body": "Inter, sans-serif"},
             "branding": {
                 "logo": None,
                 "logo_dark": None,
                 "favicon": None,
-                "banner": None
-            },
-            "layout": {
-                "style": "grid",
-                "header": "fixed",
-                "product_card": "modern"
+                "banner": None,
             },
+            "layout": {"style": "grid", "header": "fixed", "product_card": "modern"},
             "social_links": {},
             "custom_css": None,
             "css_variables": {
@@ -80,7 +75,7 @@ class ThemeContextManager:
                 "--color-border": "#e5e7eb",
                 "--font-heading": "Inter, sans-serif",
                 "--font-body": "Inter, sans-serif",
-            }
+            },
         }
 
 
@@ -106,7 +101,7 @@ class ThemeContextMiddleware(BaseHTTPMiddleware):
         Load and inject theme context.
         """
         # Only inject theme for shop pages (not admin or API)
-        if hasattr(request.state, 'vendor') and request.state.vendor:
+        if hasattr(request.state, "vendor") and request.state.vendor:
             vendor = request.state.vendor
 
             # Get database session
@@ -123,13 +118,13 @@ class ThemeContextMiddleware(BaseHTTPMiddleware):
                     extra={
                         "vendor_id": vendor.id,
                         "vendor_name": vendor.name,
-                        "theme_name": theme.get('theme_name', 'default'),
-                    }
+                        "theme_name": theme.get("theme_name", "default"),
+                    },
                 )
             except Exception as e:
                 logger.error(
                     f"[THEME] Failed to load theme for vendor {vendor.id}: {e}",
-                    exc_info=True
+                    exc_info=True,
                 )
                 # Fallback to default theme
                 request.state.theme = ThemeContextManager.get_default_theme()
@@ -140,7 +135,7 @@ class ThemeContextMiddleware(BaseHTTPMiddleware):
             request.state.theme = ThemeContextManager.get_default_theme()
             logger.debug(
                 "[THEME] No vendor context, using default theme",
-                extra={"has_vendor": False}
+                extra={"has_vendor": False},
             )
 
         # Continue processing