feat: initial postcard manager - FastAPI + Jinja2 + SQLite

app/templates/api_keys.html

@@ -0,0 +1,34 @@
+{% extends "base.html" %}
+{% block title %}API Keys - Postcard Manager{% endblock %}
+{% block content %}
+<div class="section-header">
+    <h1>API Keys</h1>
+    <form method="post" action="/api-keys">
+        <button type="submit" class="btn btn-primary">+ 创建新 Key</button>
+    </form>
+</div>
+{% if keys %}
+<table>
+    <thead><tr><th>Key</th><th>创建时间</th><th>操作</th></tr></thead>
+    <tbody>
+        {% for k in keys %}
+        <tr>
+            <td><code>{{ k.key }}</code></td>
+            <td>{{ k.created_at.strftime('%Y-%m-%d %H:%M') }}</td>
+            <td>
+                <form method="post" action="/api-keys/{{ k.id }}/delete" class="inline">
+                    <button type="submit" class="btn btn-danger btn-sm" onclick="return confirm('确定删除该 Key？')">删除</button>
+                </form>
+            </td>
+        </tr>
+        {% endfor %}
+    </tbody>
+</table>
+{% else %}
+<p class="empty">还没有 API Key，点击上方按钮创建一个。</p>
+{% endif %}
+<section class="section" style="margin-top:2rem">
+    <h2>使用说明</h2>
+    <pre>curl -H "Authorization: Bearer YOUR_API_KEY" http://localhost:8000/api/profiles</pre>
+</section>
+{% endblock %}