feat: initial postcard manager - FastAPI + Jinja2 + SQLite

app/templates/dashboard.html

@@ -0,0 +1,27 @@
+{% extends "base.html" %}
+{% block title %}Dashboard - Postcard Manager{% endblock %}
+{% block content %}
+<h1>👋 欢迎，{{ user.username }}</h1>
+<section class="section">
+    <div class="section-header">
+        <h2>Profiles</h2>
+    </div>
+    {% if profiles %}
+    <div class="card-grid">
+        {% for p in profiles %}
+        <a href="/profiles/{{ p.id }}/postcards" class="card">
+            <h3>{{ p.nickname }}</h3>
+            <div class="stats">
+                <span class="stat">📬 {{ stats[p.id].total }}</span>
+                <span class="stat sent">寄出 {{ stats[p.id].sent }}</span>
+                <span class="stat delivered">送达 {{ stats[p.id].delivered }}</span>
+                <span class="stat received">收到 {{ stats[p.id].received }}</span>
+            </div>
+        </a>
+        {% endfor %}
+    </div>
+    {% else %}
+    <p class="empty">还没有 Profile，<a href="/profiles">去创建一个</a>。</p>
+    {% endif %}
+</section>
+{% endblock %}