增加公告图片编辑, 增加取消归档

backend/internal/modules/announcement/handler.go

@@ -173,6 +173,22 @@ func (h *Handler) Archive(c *gin.Context) {
 	response.OK(c, gin.H{"message": "归档成功"})
 }
 
+// Unarchive 取消归档公告
+func (h *Handler) Unarchive(c *gin.Context) {
+	id, err := parseID(c)
+	if err != nil {
+		response.BadRequest(c, "公告ID不正确")
+		return
+	}
+
+	if err := h.service.Unarchive(c.Request.Context(), id); err != nil {
+		response.InternalServerError(c, "取消归档公告失败")
+		return
+	}
+
+	response.OK(c, gin.H{"message": "取消归档成功"})
+}
+
 // Delete 删除公告
 func (h *Handler) Delete(c *gin.Context) {
 	id, err := parseID(c)

backend/internal/modules/announcement/repository.go

@@ -179,6 +179,17 @@ func (r *Repository) Archive(ctx context.Context, id uint64) error {
 		Update("status", "archived").Error
 }
 
+// Unarchive 取消归档公告，恢复为已发布状态
+func (r *Repository) Unarchive(ctx context.Context, id uint64) error {
+	now := time.Now()
+	return r.db.WithContext(ctx).Model(&model.Announcement{}).
+		Where("id = ?", id).
+		Updates(map[string]interface{}{
+			"status":       "published",
+			"published_at": gorm.Expr("COALESCE(published_at, ?)", now),
+		}).Error
+}
+
 // Delete 删除公告
 func (r *Repository) Delete(ctx context.Context, id uint64) error {
 	return r.db.WithContext(ctx).Where("id = ?", id).Delete(&model.Announcement{}).Error

backend/internal/modules/announcement/service.go

@@ -95,6 +95,11 @@ func (s *Service) Archive(ctx context.Context, id uint64) error {
 	return s.repo.Archive(ctx, id)
 }
 
+// Unarchive 取消归档公告
+func (s *Service) Unarchive(ctx context.Context, id uint64) error {
+	return s.repo.Unarchive(ctx, id)
+}
+
 // Delete 删除公告
 func (s *Service) Delete(ctx context.Context, id uint64) error {
 	return s.repo.Delete(ctx, id)

backend/internal/modules/file/handler.go

@@ -65,7 +65,7 @@ func (h *Handler) writeObject(c *gin.Context, publicOnly bool) {
 		response.BadRequest(c, "文件 key 不正确")
 		return
 	}
-	if publicOnly && !strings.HasPrefix(key, "home-banner/") && !strings.HasPrefix(key, "avatar/") && !strings.HasPrefix(key, "payment-cert/") {
+	if publicOnly && !strings.HasPrefix(key, "home-banner/") && !strings.HasPrefix(key, "avatar/") && !strings.HasPrefix(key, "payment-cert/") && !strings.HasPrefix(key, "announcement/") {
 		response.Error(c, http.StatusNotFound, "not_found", "文件不存在或暂不可访问")
 		return
 	}

backend/internal/modules/file/service.go

@@ -106,7 +106,7 @@ func normalizeContentType(contentType string, data []byte) string {
 
 func fileURLForScene(scene string, key string) string {
 	fileURL := "/api/files/object?key=" + url.QueryEscape(key)
-	if scene == "home-banner" || scene == "avatar" || scene == "payment-cert" {
+	if scene == "home-banner" || scene == "avatar" || scene == "payment-cert" || scene == "announcement" {
 		fileURL = "/api/public/files/object?key=" + url.QueryEscape(key)
 	}
 	return fileURL
@@ -115,7 +115,7 @@ func fileURLForScene(scene string, key string) string {
 func normalizeScene(scene string) string {
 	scene = strings.TrimSpace(strings.ToLower(scene))
 	switch scene {
-	case "listing", "handoff", "dispute", "realname", "avatar", "home-banner", "chat", "payment-cert":
+	case "listing", "handoff", "dispute", "realname", "avatar", "home-banner", "chat", "payment-cert", "announcement":
 		return scene
 	default:
 		return "misc"

backend/internal/modules/file/storage_test.go

@@ -1,6 +1,9 @@
 package file
 
-import "testing"
+import (
+	"strings"
+	"testing"
+)
 
 func TestSanitizeObjectMetadataEscapesNonASCII(t *testing.T) {
 	got := sanitizeObjectMetadata(map[string]string{
@@ -11,3 +14,18 @@ func TestSanitizeObjectMetadataEscapesNonASCII(t *testing.T) {
 		t.Fatalf("metadata filename = %q", got["original-filename"])
 	}
 }
+
+func TestAnnouncementSceneUsesPublicFileURL(t *testing.T) {
+	key := "announcement/2026/06/15/example.webp"
+	got := fileURLForScene("announcement", key)
+
+	if !strings.HasPrefix(got, "/api/public/files/object?") {
+		t.Fatalf("announcement file url = %q, want public file endpoint", got)
+	}
+}
+
+func TestNormalizeSceneAllowsAnnouncement(t *testing.T) {
+	if got := normalizeScene("announcement"); got != "announcement" {
+		t.Fatalf("normalize announcement scene = %q", got)
+	}
+}