perf(ai-scanner): drop confidence scoring to simplify AI menu import

Removes the per-item confidence field end to end (prompt, extraction
parsing, ai_import_items writes, API responses, low-confidence badge
in the mobile review screen). ai_import_items.confidence column is
left in place but unused (nullable, no destructive migration).

apps/mobile/src/app/(onboarding)/ai-review.tsx

@@ -33,10 +33,6 @@ export default function OnboardingAiReviewStep() {
   }, []);
 
   const totalItems = categories.reduce((acc, c) => acc + c.items.length, 0);
-  const lowConfidenceItems = categories.reduce(
-    (acc, c) => acc + c.items.filter((i) => i.confidence < 0.85).length,
-    0,
-  );
 
   function updateItem(categoryId: string, itemId: string, field: "name" | "price" | "description", value: string) {
     setCategories((prev) =>
@@ -48,7 +44,7 @@ export default function OnboardingAiReviewStep() {
             if (itm.id !== itemId) return itm;
             if (field === "price") {
               const parsed = Number(value.replace(",", "."));
-              return { ...itm, price: Number.isNaN(parsed) ? 0 : parsed, confidence: 1 };
+              return { ...itm, price: Number.isNaN(parsed) ? 0 : parsed };
             }
             return { ...itm, [field]: value };
           }),
@@ -75,7 +71,6 @@ export default function OnboardingAiReviewStep() {
       name: "Yeni Ürün",
       price: 100,
       description: "",
-      confidence: 1,
     };
 
     setCategories((prev) =>
@@ -206,24 +201,6 @@ export default function OnboardingAiReviewStep() {
             </View>
           </View>
 
-          {lowConfidenceItems > 0 ? (
-            <View
-              style={{
-                marginTop: 12,
-                paddingTop: 12,
-                borderTopWidth: 1,
-                borderTopColor: "#F5F5F4",
-                flexDirection: "row",
-                alignItems: "center",
-                gap: 8,
-              }}
-            >
-              <Ionicons name="warning-outline" size={16} color="#D97706" />
-              <Text style={{ color: "#D97706", fontSize: 12, fontWeight: "600", flex: 1 }}>
-                {lowConfidenceItems} ürünün fiyatı veya ismi silik çıkmış olabilir, lütfen sarı etiketli ürünleri kontrol edin.
-              </Text>
-            </View>
-          ) : null}
         </View>
 
         {/* Categories & Items List */}
@@ -269,39 +246,17 @@ export default function OnboardingAiReviewStep() {
             {/* Items in Category */}
             <View style={{ gap: 12 }}>
               {category.items.map((item) => {
-                const isLowConfidence = item.confidence < 0.85;
                 return (
                   <View
                     key={item.id}
                     style={{
-                      backgroundColor: isLowConfidence ? "#FFFBEB" : "#FAFAFA",
+                      backgroundColor: "#FAFAFA",
                       borderWidth: 1,
-                      borderColor: isLowConfidence ? "#FDE68A" : "#F4F4F5",
+                      borderColor: "#F4F4F5",
                       borderRadius: 12,
                       padding: 12,
                     }}
                   >
-                    {isLowConfidence ? (
-                      <View
-                        style={{
-                          alignSelf: "flex-start",
-                          backgroundColor: "#FEF3C7",
-                          paddingHorizontal: 8,
-                          paddingVertical: 2,
-                          borderRadius: 6,
-                          marginBottom: 6,
-                          flexDirection: "row",
-                          alignItems: "center",
-                          gap: 4,
-                        }}
-                      >
-                        <Ionicons name="warning-outline" size={12} color="#B45309" />
-                        <Text style={{ color: "#B45309", fontSize: 11, fontWeight: "700" }}>
-                          Fiyatı / İsmi Kontrol Edin (%{Math.round(item.confidence * 100)} Güven)
-                        </Text>
-                      </View>
-                    ) : null}
-
                     <View style={{ flexDirection: "row", gap: 8, alignItems: "center", marginBottom: 6 }}>
                       <TextInput
                         value={item.name}