fix: Improve AI product price extraction for French e-commerce sites

Three critical fixes to resolve AI extraction returning null prices with 0.0 confidence:

1. **Add French price/stock keywords** (app/utils/text.py)
   - Added € symbol and French price patterns (12,99 €, 1 234,56 €)
   - Added French keywords: prix, coût, promotion, réduction
   - Added French stock keywords: ajouter au panier, en stock, rupture, épuisé
   - Previously only detected $ and English keywords

2. **Enable full-page screenshots** (app/services/browserless_service.py)
   - Changed full_page=False to full_page=True
   - Now captures entire page instead of viewport-only
   - Prevents missing prices located below the fold

3. **Increase image resolution** (app/utils/image.py)
   - Increased MAX_IMAGE_SIZE from 1024px to 2048px
   - Preserves fine details in price text for better AI recognition
   - Improves readability on dense product pages

These changes fix the issue where AI models returned:
{"price": null, "price_confidence": 0.0, "in_stock": null, "in_stock_confidence": 0.0}

Tested with Amazon.fr product monitoring.

app/services/browserless_service.py

@@ -238,8 +238,9 @@ class BrowserlessService:
                 safe_name = "".join(c if c.isalnum() else "_" for c in url.split("//")[-1])[:50]
                 filename = f"{safe_name}_{timestamp}.jpg"
                 screenshot_path = f"{screenshots_dir}/{filename}"
-                
-                await page.screenshot(path=screenshot_path, full_page=False, quality=80, type="jpeg")
+
+                # Use full_page=True to capture entire page, not just viewport
+                await page.screenshot(path=screenshot_path, full_page=True, quality=80, type="jpeg")
                 logger.info(f"Screenshot saved to {screenshot_path}")
             except Exception as e:
                 logger.warning(f"Failed to take screenshot: {e}")

app/utils/image.py

@@ -8,7 +8,8 @@ from PIL import Image
 logger = logging.getLogger(__name__)
 
 # Image processing constants
-MAX_IMAGE_SIZE = 1024
+# Increased from 1024 to 2048 to preserve more detail for AI analysis
+MAX_IMAGE_SIZE = 2048
 JPEG_QUALITY = 85
 
 

app/utils/text.py

@@ -69,6 +69,7 @@ def filter_relevant_text(text: str, max_length: int = 2000) -> str:
 
     # Keywords to search for (case-insensitive)
     price_keywords = [
+        # English patterns
         r"\$\d+\.?\d*",  # $XX.XX pattern
         r"\d+\.\d{2}\s*(usd|eur|gbp|cad)",  # XX.XX USD pattern
         "price:",
@@ -78,9 +79,23 @@ def filter_relevant_text(text: str, max_length: int = 2000) -> str:
         "save:",
         "discount:",
         r"\$",  # Any dollar sign
+        # French patterns
+        r"€",  # Euro symbol
+        r"\d+,\d{2}\s*€",  # French format: 12,99 €
+        r"\d+\.\d{3},\d{2}",  # French thousands: 1.234,56
+        r"\d+\s\d{3},\d{2}",  # French thousands with space: 1 234,56
+        "prix",  # French: price
+        "prix:",
+        "coût",
+        "coût:",
+        "promotion",
+        "réduction",
+        "économie",
+        "remise",
     ]
 
     stock_keywords = [
+        # English keywords
         "add to cart",
         "buy now",
         "purchase",
@@ -96,6 +111,20 @@ def filter_relevant_text(text: str, max_length: int = 2000) -> str:
         "ships",
         "delivery",
         "get it by",
+        # French keywords
+        "ajouter au panier",
+        "acheter",
+        "commander",
+        "en stock",
+        "rupture",
+        "rupture de stock",
+        "disponible",
+        "indisponible",
+        "épuisé",
+        "être averti",
+        "précommande",
+        "livraison",
+        "expédié",
     ]
 
     all_keywords = price_keywords + stock_keywords