支持板块图标与主题色自定义，并优化列表加载与未保存离开提示。

新增后端图标校验与色槽规范化，前端展示 BoardBadge/骨架屏，发帖与板块管理页增加未保存确认。

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

embed_static/static/spa/assets/textarea-Dcf0-FNg.js

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+import{r as s,j as a}from"./react-vendor-BdyZmpPe.js";import{c as t}from"./index-Cp7Ff9NP.js";const i=s.forwardRef(({className:e,...r},o)=>a.jsx("textarea",{className:t("flex min-h-[60px] w-full rounded-md border border-input bg-background px-3 py-2 text-sm shadow-sm placeholder:text-muted-foreground focus-visible:outline-none focus-visible:ring-1 focus-visible:ring-ring disabled:cursor-not-allowed disabled:opacity-50",e),ref:o,...r}));i.displayName="Textarea";export{i as T};