feat: 增加友链申请、独立页面、投票/悬赏/抽奖帖与侧栏签到，并统一开发数据目录

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

service/friend_link_enrich.go

@@ -0,0 +1,93 @@
+package service
+
+import (
+	"encoding/json"
+	"strings"
+
+	"git.iioio.com/freefire/jiang13-forum/model"
+)
+
+// EnrichFriendLinksLogos 为缺少 LOGO 的已发布友链，从已通过申请中按 URL 回填
+func EnrichFriendLinksLogos(links []FriendLink) []FriendLink {
+	if len(links) == 0 {
+		return links
+	}
+	needKeys := make(map[string]int)
+	for i, l := range links {
+		if strings.TrimSpace(l.Logo) != "" {
+			continue
+		}
+		key := friendLinkURLKey(l.URL)
+		if key == "" {
+			continue
+		}
+		needKeys[key] = i
+	}
+	if len(needKeys) == 0 {
+		return links
+	}
+
+	var applies []model.FriendLinkApply
+	_ = model.DB.
+		Where("status = ? AND logo <> ''", model.FriendLinkApplyStatusApproved).
+		Order("id DESC").
+		Find(&applies).Error
+
+	logoByURL := make(map[string]string, len(applies))
+	for _, a := range applies {
+		key := friendLinkURLKey(a.URL)
+		if key == "" {
+			continue
+		}
+		if _, ok := logoByURL[key]; ok {
+			continue
+		}
+		logo := normalizeFriendLinkLogoOptional(a.Logo)
+		if logo != "" {
+			logoByURL[key] = logo
+		}
+	}
+	if len(logoByURL) == 0 {
+		return links
+	}
+
+	out := make([]FriendLink, len(links))
+	copy(out, links)
+	for key, idx := range needKeys {
+		if logo, ok := logoByURL[key]; ok {
+			out[idx].Logo = logo
+		}
+	}
+	return out
+}
+
+func friendLinksLogoSnapshot(links []FriendLink) string {
+	type snap struct {
+		URL  string `json:"url"`
+		Logo string `json:"logo"`
+	}
+	items := make([]snap, len(links))
+	for i, l := range links {
+		items[i] = snap{URL: friendLinkURLKey(l.URL), Logo: strings.TrimSpace(l.Logo)}
+	}
+	b, _ := json.Marshal(items)
+	return string(b)
+}
+
+// maybePersistEnrichedFriendLinks 若回填产生新 LOGO，写回 site_friend_links
+func (s *ForumSettingsService) maybePersistEnrichedFriendLinks(enriched []FriendLink) error {
+	raw := s.getString(SettingSiteFriendLinks, "[]")
+	before := parseFriendLinksJSON(raw)
+	if friendLinksLogoSnapshot(before) == friendLinksLogoSnapshot(enriched) {
+		return nil
+	}
+	normalized, err := normalizeFriendLinks(enriched)
+	if err != nil {
+		return err
+	}
+	linksJSON, err := json.Marshal(normalized)
+	if err != nil {
+		return err
+	}
+	return s.setString(SettingSiteFriendLinks, string(linksJSON))
+}