diff --git a/app/routers/web.py b/app/routers/web.py
index 8c571c4..24bb6fb 100644
--- a/app/routers/web.py
+++ b/app/routers/web.py
@@ -536,7 +536,7 @@ def postcard_create(
 
     pc = Postcard(
         profile_id=profile_id,
-        card_number=card_number,
+        card_number=card_number.strip().upper(),
         status=status,
         recipient_name=recipient_name or None,
         country=(country.strip().upper() if country else None),
@@ -612,7 +612,7 @@ def postcard_update(
             except ValueError:
                 return None
 
-    pc.card_number = card_number
+    pc.card_number = card_number.strip().upper()
     pc.status = status
     pc.recipient_name = recipient_name or None
     pc.country = country or None
diff --git a/app/templates/postcard_form.html b/app/templates/postcard_form.html
index 0afe287..bdd2eeb 100644
--- a/app/templates/postcard_form.html
+++ b/app/templates/postcard_form.html
@@ -6,7 +6,7 @@
 </div>
 <form method="post" action="{{ '/postcards/%d/edit' % postcard.id if postcard else '/profiles/%d/postcards' % profile.id }}" class="form-card">
     <label>编号 * <span style="font-weight:400;color:var(--text-muted);font-size:.8rem">格式：AB-1234567</span></label>
-    <input type="text" name="card_number" value="{{ postcard.card_number if postcard else '' }}" required placeholder="AB-1234567">
+    <input type="text" name="card_number" value="{{ postcard.card_number if postcard else '' }}" required placeholder="AB-1234567" style="text-transform:uppercase" oninput="this.value=this.value.toUpperCase()">
 
     <label>状态 *</label>
     <select name="status" id="status-select" onchange="toggleFields()" required>
@@ -86,5 +86,18 @@ function toggleFields() {
     }
 }
 toggleFields();
+{% if not postcard %}
+// Auto-fill date fields with today when switching status on new postcards
+(function() {
+    var today = new Date().toISOString().slice(0, 10);
+    var sendTime = document.getElementById('input-send-time');
+    var receiveTime = document.getElementById('input-receive');
+    var statusSel = document.getElementById('status-select');
+    statusSel.addEventListener('change', function() {
+        if (this.value === 'sent' && !sendTime.value) sendTime.value = today;
+        if (this.value === 'received' && !receiveTime.value) receiveTime.value = today;
+    });
+})();
+{% endif %}
 </script>
 {% endblock %}