feat: SOCKS5 代理管理系统 v1.0

Flask + SQLite + Bootstrap5 暗色主题
- 仪表盘: 在线/离线统计 + 最近代理 + 操作日志
- 代理 CRUD: 增删改 + 启用/禁用 + 单/批量健康检测(SOCKS5)
- 分组管理: 创建/删除/筛选
- 操作日志: 分页查询
- RESTful API + Web 界面
- 管理员登录认证 (SM_ADMIN_PASSWORD 环境变量)

templates/proxy_form.html

@@ -0,0 +1,60 @@
+{% extends "base.html" %}
+{% block title %}{{ '编辑' if action=='edit' else '添加' }}代理 · SOCKS Manager{% endblock %}
+
+{% block content %}
+<div class="d-flex justify-content-between align-items-center mb-4">
+  <h4 class="mb-0"><i class="bi bi-{{ 'pencil' if action=='edit' else 'plus-circle' }}"></i>
+    {{ '编辑代理' if action=='edit' else '添加代理' }}</h4>
+  <a href="/proxies" class="btn btn-outline-secondary btn-sm"><i class="bi bi-arrow-left"></i> 返回</a>
+</div>
+
+<div class="card" style="max-width:640px">
+  <div class="card-body">
+    <form method="post">
+      <div class="row g-3">
+        <div class="col-md-6">
+          <label class="form-label">名称</label>
+          <input name="name" class="form-control" required value="{{ p.name if p else '' }}">
+        </div>
+        <div class="col-md-6">
+          <label class="form-label">分组</label>
+          <select name="group_id" class="form-select">
+            <option value="">无</option>
+            {% for g in groups %}
+            <option value="{{ g.id }}" {% if p and p.group and p.group.id==g.id %}selected{% endif %}>
+              {{ g.name }}</option>
+            {% endfor %}
+          </select>
+        </div>
+        <div class="col-md-8">
+          <label class="form-label">主机地址</label>
+          <input name="host" class="form-control" required placeholder="1.2.3.4 或 socks.example.com"
+                 value="{{ p.host if p else '' }}">
+        </div>
+        <div class="col-md-4">
+          <label class="form-label">端口</label>
+          <input name="port" class="form-control" type="number" min="1" max="65535" required
+                 value="{{ p.port if p else '' }}">
+        </div>
+        <div class="col-md-6">
+          <label class="form-label">用户名（可选）</label>
+          <input name="username" class="form-control" value="{{ p.username if p and p.username else '' }}">
+        </div>
+        <div class="col-md-6">
+          <label class="form-label">密码（可选）</label>
+          <input name="password" class="form-control" value="{{ p.password if p and p.password else '' }}">
+        </div>
+        <div class="col-12">
+          <label class="form-label">备注</label>
+          <textarea name="notes" class="form-control" rows="2">{{ p.notes if p else '' }}</textarea>
+        </div>
+      </div>
+      <div class="mt-4 d-flex gap-2">
+        <button type="submit" class="btn btn-primary"><i class="bi bi-check-lg"></i> 保存</button>
+        <a href="/proxies" class="btn btn-outline-secondary">取消</a>
+      </div>
+    </form>
+  </div>
+</div>
+
+{% endblock %}