feat(ui): redesign postcards list with tabs, row layout, country dropdown filter

app/templates/postcards.html

@@ -7,43 +7,80 @@
 </div>
 <div class="filter-bar">
     <form method="get" class="form-row">
-        <select name="status">
-            <option value="">全部状态</option>
-            <option value="sent" {% if status == 'sent' %}selected{% endif %}>已寄出</option>
-            <option value="delivered" {% if status == 'delivered' %}selected{% endif %}>已送达</option>
-            <option value="received" {% if status == 'received' %}selected{% endif %}>已收到</option>
+        <select name="country">
+            <option value="">全部国家</option>
+            {% for c in countries %}
+            <option value="{{ c }}" {% if country == c %}selected{% endif %}>{{ c|flag }} {{ c }}</option>
+            {% endfor %}
         </select>
-        <input type="text" name="country" placeholder="国家/地区" value="{{ country }}">
         <button type="submit" class="btn">筛选</button>
     </form>
 </div>
-{% if postcards %}
-<div class="card-grid">
-    {% for pc in postcards %}
-    <a href="/postcards/{{ pc.id }}" class="postcard-card">
+
+<div class="tabs" id="tabs">
+    <button class="tab active" onclick="switchTab('sent')">寄出 ({{ sent|length }})</button>
+    <button class="tab" onclick="switchTab('received')">收到 ({{ received|length }})</button>
+</div>
+
+<div id="tab-sent" class="tab-panel">
+{% if sent %}
+{% for pc in sent %}
+<a href="/postcards/{{ pc.id }}" class="postcard-row">
+    <div class="postcard-row-img">
         {% if pc.image_front %}
-        <img src="{{ pc.image_front }}" alt="正面" class="thumb">
+        <img src="{{ pc.image_front }}" alt="正面">
         {% else %}
         <div class="thumb placeholder">📷</div>
         {% endif %}
-        <div class="postcard-info">
-            <span class="badge badge-{{ pc.status }}">{{ {'sent':'已寄出','delivered':'已送达','received':'已收到'}.get(pc.status, pc.status) }}</span>
-            <strong>{{ pc.card_number }}</strong>
-            {% if pc.status in ('sent','delivered') %}
-            <span>→ {{ pc.recipient_name or '-' }} ({{ pc.country|flag }} {{ pc.country or '-' }})</span>
-            {% else %}
-            <span>← {{ pc.sender_name or '-' }}</span>
-            {% endif %}
-            {% if pc.status == 'sent' %}
-            <form method="post" action="/postcards/{{ pc.id }}/mark-delivered" class="inline" onclick="event.stopPropagation();">
-                <button type="submit" class="btn btn-sm btn-primary" onclick="return confirm('确认已送达？')">✓ 标记已送达</button>
-            </form>
-            {% endif %}
-        </div>
-    </a>
-    {% endfor %}
-</div>
+    </div>
+    <div class="postcard-row-info">
+        <strong>{{ pc.card_number }}</strong>
+        <span>{{ pc.country|flag }} {{ pc.country or '-' }}</span>
+        <span>→ {{ pc.recipient_name or '-' }}</span>
+        <span class="badge badge-{{ pc.status }}">{{ {'sent':'已寄出','delivered':'已送达'}.get(pc.status) }}</span>
+    </div>
+    <div class="postcard-row-action">
+        {% if pc.status == 'sent' %}
+        <form method="post" action="/postcards/{{ pc.id }}/mark-delivered" onclick="event.preventDefault();event.stopPropagation();if(confirm('确认已送达？'))this.submit();">
+            <button type="submit" class="btn btn-sm btn-primary">✓ 标记已送达</button>
+        </form>
+        {% endif %}
+    </div>
+</a>
+{% endfor %}
 {% else %}
-<p class="empty">没有找到明信片。</p>
+<p class="empty">没有寄出的明信片。</p>
 {% endif %}
+</div>
+
+<div id="tab-received" class="tab-panel" style="display:none">
+{% if received %}
+{% for pc in received %}
+<a href="/postcards/{{ pc.id }}" class="postcard-row">
+    <div class="postcard-row-img">
+        {% if pc.image_front %}
+        <img src="{{ pc.image_front }}" alt="正面">
+        {% else %}
+        <div class="thumb placeholder">📷</div>
+        {% endif %}
+    </div>
+    <div class="postcard-row-info">
+        <strong>{{ pc.card_number }}</strong>
+        <span>← {{ pc.sender_name or '-' }}</span>
+    </div>
+</a>
+{% endfor %}
+{% else %}
+<p class="empty">没有收到的明信片。</p>
+{% endif %}
+</div>
+
+<script>
+function switchTab(name) {
+    document.querySelectorAll('.tab').forEach(function(t) { t.classList.remove('active'); });
+    document.querySelectorAll('.tab-panel').forEach(function(p) { p.style.display = 'none'; });
+    event.currentTarget.classList.add('active');
+    document.getElementById('tab-' + name).style.display = '';
+}
+</script>
 {% endblock %}