diff --git a/apps/mini-user/src/pages/address-edit/index.tsx b/apps/mini-user/src/pages/address-edit/index.tsx
index ef9a06a..c512ddd 100644
--- a/apps/mini-user/src/pages/address-edit/index.tsx
+++ b/apps/mini-user/src/pages/address-edit/index.tsx
@@ -5,9 +5,15 @@ import PageShell from '../../components/PageShell';
 import SubPageHeader from '../../components/SubPageHeader';
 import RegionPicker from '../../components/RegionPicker';
 import { buildAddressListUrl, readCheckoutContext } from '../../lib/checkout-nav';
-import { DEFAULT_REGION, formatRegion, type RegionSelection } from '../../lib/region-data';
+import {
+  DEFAULT_REGION,
+  REGION_ALL,
+  formatRegion,
+  type RegionSelection,
+} from '../../lib/region-data';
 import { normalizePhoneInput, validateMobilePhone } from '../../lib/phone';
 import { getStoredUserPhone, resolveDefaultUserPhone } from '../../lib/user-phone';
+import { resolveUserCity } from '../../lib/user-location';
 import { request, toast, type UserProfile } from '../../lib/api';
 
 type AddressForm = {
@@ -27,6 +33,7 @@ export default function AddressEditPage() {
   const checkoutCtx = readCheckoutContext(router.params);
   const [pickerOpen, setPickerOpen] = useState(false);
   const [saving, setSaving] = useState(false);
+  const [locating, setLocating] = useState(false);
   const [error, setError] = useState('');
   const [form, setForm] = useState<AddressForm>(() => ({
     receiverName: '',
@@ -49,6 +56,35 @@ export default function AddressEditPage() {
       .catch(() => {});
   }, [id]);
 
+  useEffect(() => {
+    if (id) return;
+    let cancelled = false;
+    setLocating(true);
+    void resolveUserCity(true)
+      .then((resolved) => {
+        if (cancelled) return;
+        const district =
+          resolved.region.district && resolved.region.district !== REGION_ALL
+            ? resolved.region.district
+            : resolved.district && resolved.district !== REGION_ALL
+              ? resolved.district
+              : DEFAULT_REGION.district;
+        setForm((prev) => ({
+          ...prev,
+          province: resolved.region.province || prev.province,
+          city: resolved.region.city || prev.city,
+          district: district || prev.district,
+        }));
+      })
+      .catch(() => {})
+      .finally(() => {
+        if (!cancelled) setLocating(false);
+      });
+    return () => {
+      cancelled = true;
+    };
+  }, [id]);
+
   useEffect(() => {
     if (!id) return;
     request<Array<Record<string, unknown>>>('/user/addresses').then((list) => {
@@ -161,7 +197,11 @@ export default function AddressEditPage() {
             style={{ display: 'flex', alignItems: 'center' }}
             onClick={() => setPickerOpen(true)}
           >
-            <Text>{regionText || '请选择省市区'}</Text>
+            <Text>
+              {locating && !isEdit
+                ? '定位中…'
+                : regionText || '请选择省市区'}
+            </Text>
           </View>
         </View>
         <View className="address-form-field">
diff --git a/apps/mini-user/src/pages/redeem/index.tsx b/apps/mini-user/src/pages/redeem/index.tsx
index f9e1030..30cb143 100644
--- a/apps/mini-user/src/pages/redeem/index.tsx
+++ b/apps/mini-user/src/pages/redeem/index.tsx
@@ -11,10 +11,26 @@ type BenefitSummary = {
   maxRedeemAmount: number;
 };
 
+const MIN_REDEEM_AMOUNT = 0.01;
+
 function formatMoney(amount: number) {
   return amount.toLocaleString('zh-CN', { minimumFractionDigits: 2, maximumFractionDigits: 2 });
 }
 
+/** 核销金额输入：最多两位小数，禁止非法字符 */
+function sanitizeRedeemAmountInput(raw: string): string {
+  let next = raw.replace(/[^\d.]/g, '');
+  const firstDot = next.indexOf('.');
+  if (firstDot >= 0) {
+    next =
+      next.slice(0, firstDot + 1) + next.slice(firstDot + 1).replace(/\./g, '');
+    const [intPart, decPart = ''] = next.split('.');
+    next = `${intPart}.${decPart.slice(0, 2)}`;
+  }
+  if (next.startsWith('.')) next = `0${next}`;
+  return next;
+}
+
 export default function RedeemPage() {
   const router = useRouter();
   const couponId = router.params.couponId;
@@ -50,14 +66,14 @@ export default function RedeemPage() {
   }, [couponId]);
 
   function fillMaxAmount() {
-    if (redeemableMax <= 0) return;
+    if (redeemableMax < MIN_REDEEM_AMOUNT) return;
     setAmount(String(redeemableMax));
   }
 
   async function submit() {
     const value = Math.round(Number(amount) * 100) / 100;
-    if (!(value > 0)) {
-      toast('请输入核销金额');
+    if (!Number.isFinite(value) || value < MIN_REDEEM_AMOUNT) {
+      toast(`核销金额不能低于 ${MIN_REDEEM_AMOUNT.toFixed(2)} 元`);
       return;
     }
     if (value > redeemableMax) {
@@ -103,7 +119,7 @@ export default function RedeemPage() {
             placeholder="输入核销金额"
             placeholderClass="redeem-input-placeholder"
             value={amount}
-            onInput={(e) => setAmount(e.detail.value)}
+            onInput={(e) => setAmount(sanitizeRedeemAmountInput(e.detail.value))}
             style={{ textAlign: 'center' }}
           />
         </View>
@@ -115,12 +131,14 @@ export default function RedeemPage() {
             全部核销
           </Text>
         </View>
-        <Text className="redeem-tips">
-          直接核销：金额须大于 0 且不超过全部可用权益余额。核销码有效期 3 分钟，请到店出示。
-        </Text>
+        <View className="redeem-tips">
+          <Text className="redeem-tips-text">
+            核销金额最低 0.01 元，且不超过可用权益余额。核销码有效期 3 分钟，请到店出示给收银员扫码。
+          </Text>
+        </View>
         <View
-          className={`redeem-submit${loading || redeemableMax <= 0 ? ' redeem-submit--disabled' : ''}`}
-          onClick={loading || redeemableMax <= 0 ? undefined : submit}
+          className={`redeem-submit${loading || redeemableMax < MIN_REDEEM_AMOUNT ? ' redeem-submit--disabled' : ''}`}
+          onClick={loading || redeemableMax < MIN_REDEEM_AMOUNT ? undefined : submit}
         >
           <Text>{loading ? '生成中...' : '生成核销码'}</Text>
         </View>
diff --git a/apps/mini-user/src/styles/redeem.css b/apps/mini-user/src/styles/redeem.css
index 953cae0..3995378 100644
--- a/apps/mini-user/src/styles/redeem.css
+++ b/apps/mini-user/src/styles/redeem.css
@@ -77,12 +77,18 @@
 .redeem-tips {
   display: block;
   box-sizing: border-box;
-  width: 100%;
-  margin: 0;
-  padding: 0 var(--space-page);
+  margin: 8px var(--space-page) 0;
+  padding: 12px 16px;
+  border-radius: var(--radius-md);
+  background: rgba(0, 0, 0, 0.03);
+}
+
+.redeem-tips-text {
+  display: block;
   font-size: 12px;
   color: var(--color-subtle-gray);
-  line-height: 1.6;
+  line-height: 1.7;
+  word-break: break-word;
 }
 
 .redeem-amount-hint {