服务端媒体源导入/保存/客户端输出链路修复：支持 snake/camel、subcategories/sources，默认客户端可见，保存后发布兼容 media-types.json。

新增数据库同步 Job API、持久化状态、实时输出、最新任务恢复，以及系统日志聚合接口。
管理端优化：日志中心、运维实时状态框、同步输出自动滚动、仪表盘“输出”列、真实延迟空态、本地 favicon/avatar。
新增 server/unified-management/assets/favicon.ico 和 developer-avatar.png，并接好 /favicon.ico、/admin/favicon.ico、/setup/favicon.ico、/assets/*。
WinUI 随机放映室卡片优先显示子接口原始 Description。
Inno 安装器输出框改为选区末尾 + SendMessage 滚动到底部。

server/unified-management/internal/db/store_test.go

@@ -391,3 +391,47 @@ func TestDashboardOverviewKeepsChecksForDeletedSources(t *testing.T) {
 		t.Fatalf("deleted source check should have fallback sourceId/name: %#v", checks[0])
 	}
 }
+
+func TestDatabaseSyncJobPersistsLatestStatusAndOutput(t *testing.T) {
+	root := t.TempDir()
+	path := filepath.Join(root, "unified.sqlite")
+	store, err := Open(&config.Config{
+		StorageDir: root,
+		Database: config.DatabaseConfig{
+			Provider:               "sqlite",
+			SQLitePath:             path,
+			FailoverEnabled:        true,
+			HealthIntervalSec:      3600,
+			MaxOpenConns:           1,
+			MaxIdleConns:           1,
+			ConnMaxLifetimeSeconds: 60,
+		},
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer store.Close()
+
+	result, err := store.ImportSQLiteToRemote()
+	if err != nil {
+		t.Fatal(err)
+	}
+	if !result.Skipped || result.Status != "skipped" {
+		t.Fatalf("expected missing remote sync to be skipped, got %#v", result)
+	}
+	latest, err := store.LatestDatabaseSyncJob()
+	if err != nil {
+		t.Fatal(err)
+	}
+	if latest.Direction != "sqlite_to_remote" || latest.Status != "skipped" {
+		t.Fatalf("unexpected latest sync job: %#v", latest)
+	}
+	if len(latest.Output) == 0 || latest.Tables == nil {
+		t.Fatalf("latest job should include output and tables: %#v", latest)
+	}
+	store.restoreDatabaseSyncStatus()
+	status := store.Status()
+	if status.LastSyncAt == "" || status.LastSyncError != "" {
+		t.Fatalf("sync status was not restored from latest job: %#v", status)
+	}
+}