移除旧版 HTML 模板与兼容层，并完善私信、举报、媒体存储与 SEO。

Co-authored-by: Cursor <cursoragent@cursor.com>

service/permalink.go

@@ -0,0 +1,140 @@
+package service
+
+import (
+	"fmt"
+	"regexp"
+	"strconv"
+	"strings"
+)
+
+const (
+	SettingPermalinkEnabled = "permalink_enabled"
+	SettingPermalinkExt     = "permalink_ext"
+	DefaultPermalinkExt     = "html"
+)
+
+var (
+	permalinkExtRe = regexp.MustCompile(`(?i)^[a-z0-9]{1,16}$`)
+	// /post/123 或 /post/123.html
+	postPermalinkRe = regexp.MustCompile(`^/post/(\d+)(?:\.([A-Za-z0-9]{1,16}))?/?$`)
+	userPermalinkRe = regexp.MustCompile(`^/user/(\d+)(?:\.([A-Za-z0-9]{1,16}))?/?$`)
+)
+
+// PermalinkConfig 伪静态（固定链接）配置
+type PermalinkConfig struct {
+	Enabled bool   `json:"permalink_enabled"`
+	Ext     string `json:"permalink_ext"` // 不含点，如 html / htm
+}
+
+// NormalizePermalinkExt 规范化后缀：去点、小写、仅字母数字
+func NormalizePermalinkExt(raw string) (string, bool) {
+	ext := strings.TrimSpace(raw)
+	ext = strings.TrimPrefix(ext, ".")
+	ext = strings.ToLower(ext)
+	if ext == "" {
+		ext = DefaultPermalinkExt
+	}
+	if !permalinkExtRe.MatchString(ext) {
+		return "", false
+	}
+	return ext, true
+}
+
+// Permalink 读取伪静态配置
+func (s *ForumSettingsService) Permalink() PermalinkConfig {
+	ext, ok := NormalizePermalinkExt(s.getString(SettingPermalinkExt, DefaultPermalinkExt))
+	if !ok {
+		ext = DefaultPermalinkExt
+	}
+	return PermalinkConfig{
+		Enabled: s.getString(SettingPermalinkEnabled, "0") == "1",
+		Ext:     ext,
+	}
+}
+
+// Suffix 返回带点后缀（未启用时为空）
+func (p PermalinkConfig) Suffix() string {
+	if !p.Enabled {
+		return ""
+	}
+	ext, ok := NormalizePermalinkExt(p.Ext)
+	if !ok {
+		ext = DefaultPermalinkExt
+	}
+	return "." + ext
+}
+
+// PostPath 帖子规范路径
+func (p PermalinkConfig) PostPath(id uint) string {
+	return fmt.Sprintf("/post/%d%s", id, p.Suffix())
+}
+
+// UserPath 用户规范路径
+func (p PermalinkConfig) UserPath(id uint) string {
+	return fmt.Sprintf("/user/%d%s", id, p.Suffix())
+}
+
+// PermalinkMatch 路径解析结果
+type PermalinkMatch struct {
+	ID        uint
+	Ext       string // 请求里的后缀（无点）；无后缀为空
+	Canonical string // 当前配置下的规范路径
+	OK        bool
+}
+
+// MatchPostPath 解析帖子公开路径（不含 /edit）
+func (p PermalinkConfig) MatchPostPath(path string) PermalinkMatch {
+	m := postPermalinkRe.FindStringSubmatch(path)
+	if len(m) < 2 {
+		return PermalinkMatch{}
+	}
+	id64, err := strconv.ParseUint(m[1], 10, 64)
+	if err != nil || id64 == 0 {
+		return PermalinkMatch{}
+	}
+	ext := ""
+	if len(m) > 2 {
+		ext = strings.ToLower(m[2])
+	}
+	id := uint(id64)
+	return PermalinkMatch{
+		ID:        id,
+		Ext:       ext,
+		Canonical: p.PostPath(id),
+		OK:        true,
+	}
+}
+
+// MatchUserPath 解析用户公开路径
+func (p PermalinkConfig) MatchUserPath(path string) PermalinkMatch {
+	m := userPermalinkRe.FindStringSubmatch(path)
+	if len(m) < 2 {
+		return PermalinkMatch{}
+	}
+	id64, err := strconv.ParseUint(m[1], 10, 64)
+	if err != nil || id64 == 0 {
+		return PermalinkMatch{}
+	}
+	ext := ""
+	if len(m) > 2 {
+		ext = strings.ToLower(m[2])
+	}
+	id := uint(id64)
+	return PermalinkMatch{
+		ID:        id,
+		Ext:       ext,
+		Canonical: p.UserPath(id),
+		OK:        true,
+	}
+}
+
+// NeedsCanonicalRedirect 当前请求路径是否应 301 到规范 URL
+func (m PermalinkMatch) NeedsCanonicalRedirect(requestPath string) bool {
+	if !m.OK {
+		return false
+	}
+	// 去掉末尾 / 再比
+	req := strings.TrimSuffix(requestPath, "/")
+	can := strings.TrimSuffix(m.Canonical, "/")
+	return req != can
+}