fix: correct Search-a-licious URL + nutriments_estimated fallback

- Search URL: search.openfoodfacts.org/search (not /api/v1/search)
- Search-a-licious returns no nutriments in hits — fetch each via v3 API
- Fall back to nutriments_estimated when no_nutrition_data is set
  or nutriments object has <3 keys (common for fresh produce)
- Handle brands as array or string from search API

src/api.rs

@@ -38,13 +38,7 @@ struct SearchHit {
     #[serde(default)]
     product_name: Option<String>,
     #[serde(default)]
-    brands: Option<String>,
+    brands: Option<Value>, // can be array or string
-    #[serde(default)]
-    nutriments: Option<Value>,
-    #[serde(default)]
-    serving_quantity: Option<f64>,
-    #[serde(default)]
-    serving_size: Option<String>,
     #[serde(default)]
     image_url: Option<String>,
 }
@@ -65,11 +59,15 @@ struct V3Product {
     #[serde(default)]
     nutriments: Option<Value>,
     #[serde(default)]
+    nutriments_estimated: Option<Value>,
+    #[serde(default)]
     serving_quantity: Option<f64>,
     #[serde(default)]
     serving_size: Option<String>,
     #[serde(default)]
     image_url: Option<String>,
+    #[serde(default, rename = "no_nutrition_data")]
+    no_nutrition_data: Option<String>,
 }
 
 impl OffClient {
@@ -88,21 +86,19 @@ impl OffClient {
 
     /// Search products by name using Search-a-licious.
     /// Returns up to `page_size` results.
+    /// Note: Search-a-licious doesn't return nutriments in search hits,
+    /// so we fetch each product via v3 API to get full nutrient data.
     pub async fn search(
         &self,
         query: &str,
         page_size: u32,
     ) -> Result<Vec<Product>> {
-        let url = "https://search.openfoodfacts.org/api/v1/search";
+        let url = "https://search.openfoodfacts.org/search";
         let params = [
             ("q", query.to_string()),
             ("page_size", page_size.to_string()),
             ("langs", "en".to_string()),
-            (
+            ("fields", "code,product_name,brands,image_url".to_string()),
-                "fields",
-                "code,product_name,brands,nutriments,serving_quantity,serving_size,image_url"
-                    .to_string(),
-            ),
         ];
 
         tracing::debug!("OFF search: {} (limit {})", query, page_size);
@@ -119,30 +115,40 @@ impl OffClient {
             .await
             .context("failed to parse OFF search response")?;
 
-        let products = resp
+        // Search-a-licious returns codes but not nutriments.
-            .hits
+        // Fetch full product data for each hit via v3 API.
-            .into_iter()
+        let mut products = Vec::new();
-            .filter_map(|h| {
+        for hit in resp.hits {
-                let name = h.product_name.clone().unwrap_or_else(|| "Unknown".to_string());
+            if let Some(code) = hit.code {
-                Some(Product {
+                // Try v3 API for full nutrient data
-                    code: h.code?,
+                if let Ok(Some(product)) = self.get_by_barcode(&code).await {
-                    product_name: name,
+                    products.push(product);
-                    brands: h.brands,
+                } else {
-                    nutriments: h
+                    // Fallback: use search hit data with empty nutriments
-                        .nutriments
+                    let name = hit.product_name.unwrap_or_else(|| "Unknown".to_string());
-                        .map(|v| v.to_string())
+                    products.push(Product {
-                        .unwrap_or_else(|| "{}".to_string()),
+                        code,
-                    serving_quantity: h.serving_quantity,
+                        product_name: name,
-                    serving_size: h.serving_size,
+                        brands: hit.brands.and_then(|b| {
-                    image_url: h.image_url,
+                            if let Some(s) = b.as_str() { Some(s.to_string()) }
-                })
+                            else if let Some(arr) = b.as_array() {
-            })
+                                Some(arr.iter().filter_map(|v| v.as_str().map(String::from)).collect::<Vec<_>>().join(", "))
-            .collect();
+                            } else { None }
+                        }),
+                        nutriments: "{}".to_string(),
+                        serving_quantity: None,
+                        serving_size: None,
+                        image_url: hit.image_url,
+                    });
+                }
+            }
+        }
 
         Ok(products)
     }
 
     /// Get a single product by barcode using OFF API v3.
+    /// Falls back to nutriments_estimated when actual nutriments are sparse.
     pub async fn get_by_barcode(&self, barcode: &str) -> Result<Option<Product>> {
         let url = format!(
             "https://world.openfoodfacts.org/api/v3/product/{}",
@@ -151,7 +157,7 @@ impl OffClient {
         let params = [
             (
                 "fields",
-                "code,product_name,brands,nutriments,serving_quantity,serving_size,image_url",
+                "code,product_name,brands,nutriments,nutriments_estimated,no_nutrition_data,serving_quantity,serving_size,image_url",
             ),
         ];
 
@@ -164,14 +170,27 @@ impl OffClient {
                 let v3: V3ProductResponse =
                     r.json().await.context("failed to parse OFF v3 response")?;
                 let p = v3.product;
+
+                // If no_nutrition_data is set or nutriments has <3 keys,
+                // use nutriments_estimated instead (more complete)
+                let use_estimated = p.no_nutrition_data.as_deref() == Some("on")
+                    || p.nutriments.as_ref().map_or(true, |n| {
+                        n.as_object().map_or(true, |o| o.len() < 3)
+                    });
+
+                let nutriments = if use_estimated {
+                    p.nutriments_estimated
+                        .or(p.nutriments)
+                        .unwrap_or(Value::Object(serde_json::Map::new()))
+                } else {
+                    p.nutriments.unwrap_or(Value::Object(serde_json::Map::new()))
+                };
+
                 Ok(Some(Product {
                     code: p.code,
                     product_name: p.product_name.unwrap_or_else(|| "Unknown".to_string()),
                     brands: p.brands,
-                    nutriments: p
+                    nutriments: nutriments.to_string(),
-                        .nutriments
-                        .map(|v| v.to_string())
-                        .unwrap_or_else(|| "{}".to_string()),
                     serving_quantity: p.serving_quantity,
                     serving_size: p.serving_size,
                     image_url: p.image_url,