chore: 初始提交 Fonu 1.0.2

- 公网反代：Nginx 状态卡片（版本 / 运行状态 / 配置校验 / 端口监听）
- 部署设置第一、二梯队（HTTPS 开关、安全头、限流、连接数、仅中国大陆 IP）
- 隧道检测兼容 frps v0.68 / v0.71（V2 与旧版端点）
- 恢复被清空的 internal/frp/store.go、internal/api/ddns_handler.go、web/src/views/DdnsView.vue

migrations/001_init.sql

@@ -0,0 +1,36 @@
+CREATE TABLE IF NOT EXISTS schema_migrations (
+    version INTEGER PRIMARY KEY,
+    applied_at TEXT NOT NULL DEFAULT (datetime('now'))
+);
+
+CREATE TABLE IF NOT EXISTS admins (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    username TEXT NOT NULL UNIQUE,
+    password_hash TEXT NOT NULL,
+    created_at TEXT NOT NULL DEFAULT (datetime('now'))
+);
+
+CREATE TABLE IF NOT EXISTS sessions (
+    id TEXT PRIMARY KEY,
+    admin_id INTEGER NOT NULL REFERENCES admins(id) ON DELETE CASCADE,
+    expires_at TEXT NOT NULL,
+    created_at TEXT NOT NULL DEFAULT (datetime('now'))
+);
+
+CREATE INDEX IF NOT EXISTS idx_sessions_expires_at ON sessions(expires_at);
+
+CREATE TABLE IF NOT EXISTS proxy_rules (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    domain TEXT NOT NULL UNIQUE COLLATE NOCASE,
+    upstream TEXT NOT NULL,
+    https_enabled INTEGER NOT NULL DEFAULT 1 CHECK (https_enabled IN (0, 1)),
+    http_redirect INTEGER NOT NULL DEFAULT 1 CHECK (http_redirect IN (0, 1)),
+    enabled INTEGER NOT NULL DEFAULT 1 CHECK (enabled IN (0, 1)),
+    created_at TEXT NOT NULL DEFAULT (datetime('now')),
+    updated_at TEXT NOT NULL DEFAULT (datetime('now'))
+);
+
+CREATE TABLE IF NOT EXISTS settings (
+    key TEXT PRIMARY KEY,
+    value TEXT NOT NULL
+);