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/ddns/dnspod.go

@@ -0,0 +1,105 @@
+package ddns
+
+import (
+	"context"
+	"fmt"
+	"net/http"
+	"strconv"
+	"strings"
+	"time"
+
+	"github.com/nrdcg/dnspod-go"
+)
+
+type DNSPod struct {
+	client *http.Client
+}
+
+func NewDNSPod() *DNSPod {
+	return &DNSPod{client: &http.Client{Timeout: 15 * time.Second}}
+}
+
+func (d *DNSPod) Name() string { return "dnspod" }
+
+func (d *DNSPod) Verify(ctx context.Context, cred Credentials) error {
+	client := d.apiClient(cred)
+	_, _, err := client.Domains.List()
+	return err
+}
+
+func (d *DNSPod) HasZone(ctx context.Context, cred Credentials, zone string) (bool, error) {
+	_, err := d.domainID(d.apiClient(cred), zone)
+	return zoneLookupOK(err)
+}
+
+func (d *DNSPod) GetRecordIP(ctx context.Context, cred Credentials, rootDomain, recordName, recordType string) (string, error) {
+	client := d.apiClient(cred)
+	domainID, err := d.domainID(client, rootDomain)
+	if err != nil {
+		return "", err
+	}
+	subDomain := subDomainForRecord(recordName)
+	records, _, err := client.Records.List(domainID, subDomain)
+	if err != nil {
+		return "", err
+	}
+	for _, rec := range records {
+		if strings.EqualFold(rec.Type, recordType) {
+			return rec.Value, nil
+		}
+	}
+	return "", nil
+}
+
+func (d *DNSPod) UpdateRecord(ctx context.Context, cred Credentials, rootDomain, recordName, recordType, ip string) error {
+	client := d.apiClient(cred)
+	domainID, err := d.domainID(client, rootDomain)
+	if err != nil {
+		return err
+	}
+	subDomain := subDomainForRecord(recordName)
+	records, _, err := client.Records.List(domainID, subDomain)
+	if err != nil {
+		return err
+	}
+	for _, rec := range records {
+		if strings.EqualFold(rec.Type, recordType) {
+			_, _, err := client.Records.Update(domainID, rec.ID, dnspod.Record{
+				Type:  recordType,
+				Name:  subDomain,
+				Value: ip,
+				Line:  rec.Line,
+				TTL:   rec.TTL,
+			})
+			return err
+		}
+	}
+	_, _, err = client.Records.Create(domainID, dnspod.Record{
+		Type:  recordType,
+		Name:  subDomain,
+		Value: ip,
+		Line:  "默认",
+		TTL:   strconv.Itoa(120),
+	})
+	return err
+}
+
+func (d *DNSPod) domainID(client *dnspod.Client, rootDomain string) (string, error) {
+	domains, _, err := client.Domains.List()
+	if err != nil {
+		return "", err
+	}
+	for _, domain := range domains {
+		if domain.Name == rootDomain {
+			return domain.ID.String(), nil
+		}
+	}
+	return "", fmt.Errorf("未找到域名 %s 对应的 DNSPod 域名", rootDomain)
+}
+
+func (d *DNSPod) apiClient(cred Credentials) *dnspod.Client {
+	params := dnspod.CommonParams{LoginToken: cred.LoginToken(), Format: "json"}
+	client := dnspod.NewClient(params)
+	client.HTTPClient = d.client
+	return client
+}