fix: Improve Fnac image extraction and add Shopify fallbacks

Fixes two issues:

**1. Fnac - No Images Displayed**
Problem: FnacParser only searched for images in parent container,
missing images nested directly in the link element.

Solution: Two-priority search
- PRIORITY 1: Search in link element first (picture, img)
- PRIORITY 2: Search in parent container
- Added warning log when no image found
- Ensures parent is always defined before use

**2. L'Incroyable - 0 Products (Shopify sites)**
Problem: GenericParser fallbacks didn't include Shopify patterns.
L'Incroyable uses Shopify structure with /products/ URLs.

Solution: Added Shopify-specific fallbacks
- a[href*='/products/'] (Shopify product URLs)
- a.product-card__link (Shopify class)
- a[href*='/collections/'] (Shopify collections)
- li[class*='product'] a (list-based layouts)

**Fallback Order (now 17 selectors):**
1. Product URL patterns (Shopify, generic)
2. Semantic classes (article, .product-card)
3. Shopify-specific selectors
4. Generic structure patterns
5. Last resort wildcards

**Expected Impact:**
- ✅ Fnac images should now display
- ✅ L'Incroyable should find products (Shopify)
- ✅ Better coverage of Shopify-based stores

app/services/parsers/fnac_parser.py

@@ -80,11 +80,30 @@ class FnacParser(BaseParser):
                 if not self.filter_by_query(title, query):
                     continue
 
-                # Extract image
+                # Extract image - try in link first, then parent
                 image_url = None
                 parent = link.find_parent(["article", "li", "div"])
-                if parent:
-                    # Try picture > source first
+
+                # PRIORITY 1: Try in the link itself
+                picture = link.find("picture")
+                if picture:
+                    source = picture.find("source")
+                    if source and source.get("srcset"):
+                        image_url = source.get("srcset").split(",")[0].split()[0]
+                    if not image_url:
+                        img = picture.find("img")
+                        if img:
+                            image_url = self._get_image_src(img)
+
+                # Try img directly in link
+                if not image_url:
+                    img = link.find("img")
+                    if img:
+                        image_url = self._get_image_src(img)
+
+                # PRIORITY 2: Try in parent container
+                if not image_url and parent:
+                    # Try picture > source
                     picture = parent.find("picture")
                     if picture:
                         source = picture.find("source")
@@ -101,8 +120,10 @@ class FnacParser(BaseParser):
                         if img:
                             image_url = self._get_image_src(img)
 
-                    if image_url:
-                        image_url = self.make_absolute_url(image_url)
+                if image_url:
+                    image_url = self.make_absolute_url(image_url)
+                else:
+                    self.logger.warning(f"No image found for Fnac product: {title[:40]}...")
 
                 # Extract price
                 price = None

app/services/parsers/generic_parser.py

@@ -73,6 +73,7 @@ class GenericParser(BaseParser):
             fallback_selectors = [
                 # Product-specific URLs
                 "a[href*='/produit']",
+                "a[href*='/products/']",  # Shopify
                 "a[href*='/product']",
                 "a[href*='/p/']",
                 "a[href*='/item']",
@@ -82,9 +83,13 @@ class GenericParser(BaseParser):
                 ".product-card a[href]",
                 ".product-item a[href]",
                 "[class*='product'] a[href]",
+                # Shopify specific
+                "a.product-card__link",
+                "a[href*='/collections/']",
                 # Generic structure
                 "article[class*='product'] a",
                 "div[class*='product'] a",
+                "li[class*='product'] a",
                 # Very generic (last resort)
                 "a[class*='product']",
             ]