feat: Admin settings 侧栏 aside_widgets 开关与排序

让运营可在 /admin/settings 配置右栏组件，并与友链页 aside 开关共用同一份 JSON。

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

routers/web/aside_widgets_test.go

@@ -0,0 +1,31 @@
+package web
+
+import (
+	"testing"
+
+	"git.iioio.com/freefire/jiang13-forum/services"
+)
+
+func TestMoveAsideWidget(t *testing.T) {
+	base := []services.AsideWidget{
+		{ID: services.AsideWidgetTagCloud, Enabled: true},
+		{ID: services.AsideWidgetRecentComments, Enabled: false},
+		{ID: services.AsideWidgetRecentUsers, Enabled: false},
+		{ID: services.AsideWidgetFriendLinks, Enabled: true},
+	}
+
+	up := moveAsideWidget(append([]services.AsideWidget(nil), base...), "up:"+services.AsideWidgetRecentComments)
+	if up[0].ID != services.AsideWidgetRecentComments || up[1].ID != services.AsideWidgetTagCloud {
+		t.Fatalf("up move failed: %+v", up)
+	}
+
+	down := moveAsideWidget(append([]services.AsideWidget(nil), base...), "down:"+services.AsideWidgetTagCloud)
+	if down[0].ID != services.AsideWidgetRecentComments || down[1].ID != services.AsideWidgetTagCloud {
+		t.Fatalf("down move failed: %+v", down)
+	}
+
+	noop := moveAsideWidget(append([]services.AsideWidget(nil), base...), "up:"+services.AsideWidgetTagCloud)
+	if noop[0].ID != services.AsideWidgetTagCloud {
+		t.Fatalf("top up should noop: %+v", noop)
+	}
+}