feat: 管理端板块管理与旧版数据导入，补充部署运营文档

- 新增管理端板块管理页面与后端接口（admin_board）
- 新增旧版数据导入：legacyimport 服务、导入面板、importusers 命令行工具
- 聊天用户卡片、板块图标等 UI 组件与界面优化
- 补充 about/公告/1Panel 部署等文档
- gitignore 排除 dist/ 构建产物与 .agents/ 本地工具目录

frontend/components/BoardIcon.tsx

@@ -0,0 +1,119 @@
+import {
+  Bookmark,
+  Book,
+  Briefcase,
+  Bell,
+  Camera,
+  Code,
+  Coffee,
+  Cpu,
+  Film,
+  Flame,
+  FlaskConical,
+  Gamepad2,
+  Globe,
+  Hash,
+  Heart,
+  HelpCircle,
+  Megaphone,
+  MessageCircle,
+  Music,
+  Newspaper,
+  Palette,
+  Pencil,
+  Rocket,
+  Sparkles,
+  Star,
+  type LucideIcon,
+} from "lucide-react";
+
+/** 板块图标库：icon 字段值 → lucide 图标；与后端种子数据保持一致 */
+const BOARD_ICON_MAP: Record<string, LucideIcon> = {
+  "message-circle": MessageCircle,
+  code: Code,
+  "help-circle": HelpCircle,
+  coffee: Coffee,
+  sparkles: Sparkles,
+  star: Star,
+  heart: Heart,
+  bookmark: Bookmark,
+  hash: Hash,
+  flame: Flame,
+  bell: Bell,
+  megaphone: Megaphone,
+  newspaper: Newspaper,
+  book: Book,
+  briefcase: Briefcase,
+  camera: Camera,
+  music: Music,
+  film: Film,
+  "gamepad-2": Gamepad2,
+  rocket: Rocket,
+  globe: Globe,
+  pencil: Pencil,
+  palette: Palette,
+  cpu: Cpu,
+  "flask-conical": FlaskConical,
+};
+
+/** 管理端图标选项：value 即 icon 字段值，label 为中文描述 */
+export const BOARD_ICONS: { value: string; label: string }[] = [
+  { value: "message-circle", label: "综合" },
+  { value: "hash", label: "话题" },
+  { value: "code", label: "代码" },
+  { value: "help-circle", label: "求助" },
+  { value: "coffee", label: "闲聊" },
+  { value: "sparkles", label: "闪光" },
+  { value: "star", label: "星标" },
+  { value: "heart", label: "心形" },
+  { value: "bookmark", label: "书签" },
+  { value: "flame", label: "热门" },
+  { value: "bell", label: "通知" },
+  { value: "megaphone", label: "公告" },
+  { value: "newspaper", label: "资讯" },
+  { value: "book", label: "学习" },
+  { value: "briefcase", label: "职场" },
+  { value: "camera", label: "摄影" },
+  { value: "music", label: "音乐" },
+  { value: "film", label: "影视" },
+  { value: "gamepad-2", label: "游戏" },
+  { value: "rocket", label: "创业" },
+  { value: "globe", label: "国际" },
+  { value: "pencil", label: "写作" },
+  { value: "palette", label: "设计" },
+  { value: "cpu", label: "硬件" },
+  { value: "flask-conical", label: "科学" },
+];
+
+/** 配色总数：av-0 ~ av-(N-1)，与 globals.css 保持一致 */
+export const BOARD_COLOR_COUNT = 16;
+
+/**
+ * 解析板块配色下标（全站统一规则）：
+ * - color_index > 0：固定配色，按 N 取模（存 1..16 渲染 av-0..av-15）
+ * - 其余（0 = 旧数据未设置 / -1 = 自动）：按板块 ID 轮换，任何页面位置都一致
+ */
+export function boardColor(b: { id: number; color_index?: number | null }): number {
+  const ci = b.color_index ?? 0;
+  if (ci > 0) return ci % BOARD_COLOR_COUNT;
+  return b.id % BOARD_COLOR_COUNT;
+}
+
+/** 板块图标：icon 匹配 lucide 图标名；未知/缺失时回退为板块名首字 */
+export default function BoardIcon({
+  icon,
+  name,
+  size = 15,
+}: {
+  icon?: string | null;
+  name: string;
+  size?: number;
+}) {
+  const I = icon ? BOARD_ICON_MAP[icon] : undefined;
+  if (I) return <I size={size} aria-hidden="true" />;
+  return (
+    <span aria-hidden="true" style={{ fontSize: Math.max(10, size * 0.78), lineHeight: 1 }}>
+      {name.slice(0, 1)}
+    </span>
+  );
+}