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

internal/frp-1.0.2/status.go

@@ -0,0 +1,157 @@
+package frp
+
+import (
+	"os"
+	"strconv"
+	"strings"
+	"time"
+
+	"github.com/fonu/fonu/internal/config"
+	"github.com/fonu/fonu/internal/nginx"
+)
+
+type Status struct {
+	Enabled             bool   `json:"enabled"`
+	Connected           bool   `json:"connected"`
+	Message             string `json:"message"`
+	LastError           string `json:"last_error,omitempty"`
+	ServerEndpoint      string `json:"server_endpoint,omitempty"`
+	ConnectedAt         string `json:"connected_at,omitempty"`
+	UptimeSeconds       int64  `json:"uptime_seconds"`
+	ClientVersion       string `json:"client_version,omitempty"`
+	HTTPGatewayEnabled  bool   `json:"http_gateway_enabled"`
+	HTTPSGatewayEnabled bool   `json:"https_gateway_enabled"`
+	SyncedDomainCount   int    `json:"synced_domain_count"`
+}
+
+func BuildStatus(cfg config.Config, frpCfg Config, enabled bool, lastError, startedAt, clientVersion string) Status {
+	st := Status{
+		Enabled:           enabled,
+		Connected:         false,
+		Message:           "未启用",
+		LastError:         strings.TrimSpace(lastError),
+		ClientVersion:     clientVersion,
+		SyncedDomainCount: len(frpCfg.CustomDomains),
+	}
+	if enabled {
+		addr := strings.TrimSpace(frpCfg.ServerAddr)
+		if addr != "" {
+			port := frpCfg.ServerPort
+			if port <= 0 {
+				port = 7000
+			}
+			st.ServerEndpoint = addr + ":" + strconv.Itoa(port)
+		}
+		st.HTTPGatewayEnabled = len(frpCfg.CustomDomains) > 0
+		st.HTTPSGatewayEnabled = len(frpCfg.CustomDomains) > 0
+	}
+	if !enabled {
+		return st
+	}
+	running, err := isProcessRunning(cfg.FrpPIDFile)
+	if err != nil || !running {
+		st.Message = "未连接"
+		if st.LastError != "" {
+			st.Message = st.LastError
+		} else if hint := readLogHint(cfg.FrpLogPath()); hint != "" {
+			st.Message = hint
+		}
+		return st
+	}
+	ok, logHint := logIndicatesConnected(cfg.FrpLogPath())
+	if ok {
+		st.Connected = true
+		st.Message = "已连接"
+		st.LastError = ""
+		applyConnectedTiming(&st, startedAt)
+		return st
+	}
+	st.Message = "连接中"
+	if logHint != "" {
+		st.Message = logHint
+	}
+	if st.LastError != "" {
+		st.Message = st.LastError
+	}
+	return st
+}
+
+func applyConnectedTiming(st *Status, startedAt string) {
+	st.ConnectedAt = strings.TrimSpace(startedAt)
+	if st.ConnectedAt == "" {
+		return
+	}
+	t, err := time.Parse(time.RFC3339, st.ConnectedAt)
+	if err != nil {
+		return
+	}
+	st.UptimeSeconds = int64(time.Since(t).Seconds())
+	if st.UptimeSeconds < 0 {
+		st.UptimeSeconds = 0
+	}
+}
+
+func isProcessRunning(pidFile string) (bool, error) {
+	pid, err := nginx.ReadPID(pidFile)
+	if err != nil {
+		if os.IsNotExist(err) {
+			return false, nil
+		}
+		return false, err
+	}
+	return nginx.IsPIDAlive(pid), nil
+}
+
+func readLogHint(path string) string {
+	lines := tailLines(path, 40)
+	for i := len(lines) - 1; i >= 0; i-- {
+		line := strings.ToLower(lines[i])
+		if strings.Contains(line, "login to server success") {
+			return ""
+		}
+		if strings.Contains(line, "connect to server error") ||
+			strings.Contains(line, "authorization failed") ||
+			strings.Contains(line, "token in login doesn't match") {
+			return sanitizeLogLine(lines[i])
+		}
+	}
+	return ""
+}
+
+func logIndicatesConnected(path string) (bool, string) {
+	lines := tailLines(path, 80)
+	for i := len(lines) - 1; i >= 0; i-- {
+		line := strings.ToLower(lines[i])
+		if strings.Contains(line, "login to server success") {
+			return true, ""
+		}
+		if strings.Contains(line, "connect to server error") ||
+			strings.Contains(line, "authorization failed") {
+			return false, sanitizeLogLine(lines[i])
+		}
+	}
+	return false, ""
+}
+
+func tailLines(path string, max int) []string {
+	data, err := os.ReadFile(path)
+	if err != nil {
+		return nil
+	}
+	lines := strings.Split(string(data), "\n")
+	if len(lines) > max {
+		lines = lines[len(lines)-max:]
+	}
+	return lines
+}
+
+func sanitizeLogLine(line string) string {
+	line = strings.TrimSpace(line)
+	if idx := strings.Index(line, "]"); idx >= 0 && idx+1 < len(line) {
+		line = strings.TrimSpace(line[idx+1:])
+	}
+	if len(line) > 200 {
+		line = line[:200] + "…"
+	}
+	return line
+}