Add bilingual uses fields (food/medicinal/other _de/_en) to species

Backend: add 6 new columns to Species and CreateSpecies structs, update
INSERT/UPDATE queries, add migration 010.
Frontend: add fields to Species type, use pick_desc() for language-aware
display in species detail and cultivar species-info card.

herbapi-ui/src/pages/cultivars.rs

@@ -843,9 +843,9 @@ pub fn CultivarDetail(slug: String) -> Element {
                                                 let sp_usda = opt_str(&sp.hardiness_zone_usda);
                                                 let sp_nfix = opt_bool(sp.nitrogen_fixer);
                                                 let sp_dynacc = opt_bool(sp.dynamic_accumulator);
-                                                let sp_food = opt_str(&sp.food_uses);
-                                                let sp_med = opt_str(&sp.medicinal_uses);
-                                                let sp_other = opt_str(&sp.other_uses);
+                                                let sp_food = pick_desc(&current_lang, &sp.food_uses_de, &sp.food_uses_en, &sp.food_uses);
+                                                let sp_med = pick_desc(&current_lang, &sp.medicinal_uses_de, &sp.medicinal_uses_en, &sp.medicinal_uses);
+                                                let sp_other = pick_desc(&current_lang, &sp.other_uses_de, &sp.other_uses_en, &sp.other_uses);
                                                 let sp_wildlife = opt_str(&sp.wildlife_value);
                                                 let sp_native = opt_str(&sp.native_range);
                                                 rsx! {

herbapi-ui/src/pages/species.rs

@@ -496,9 +496,9 @@ pub fn SpeciesDetail(slug: String) -> Element {
                     let desc = pick_desc(&current_lang, &s.description_de, &s.description_en, &s.description);
 
                     // Uses
-                    let food = os(&s.food_uses);
-                    let med = os(&s.medicinal_uses);
-                    let other = os(&s.other_uses);
+                    let food = pick_desc(&current_lang, &s.food_uses_de, &s.food_uses_en, &s.food_uses);
+                    let med = pick_desc(&current_lang, &s.medicinal_uses_de, &s.medicinal_uses_en, &s.medicinal_uses);
+                    let other = pick_desc(&current_lang, &s.other_uses_de, &s.other_uses_en, &s.other_uses);
                     let edibility = match s.edibility_rating {
                         Some(r) => format!("{r}/5"),
                         None => em.to_string(),

herbapi-ui/src/types.rs

@@ -43,8 +43,14 @@ pub struct Species {
     pub salt_tolerance: Option<String>,
     pub edibility_rating: Option<i16>,
     pub food_uses: Option<String>,
+    pub food_uses_de: Option<String>,
+    pub food_uses_en: Option<String>,
     pub medicinal_uses: Option<String>,
+    pub medicinal_uses_de: Option<String>,
+    pub medicinal_uses_en: Option<String>,
     pub other_uses: Option<String>,
+    pub other_uses_de: Option<String>,
+    pub other_uses_en: Option<String>,
     pub native_range: Option<String>,
     pub plant_layer: Option<String>,
     pub nitrogen_fixer: Option<bool>,