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/input-y6vZyHhN.js

@@ -0,0 +1 @@
+import{r as t,j as i}from"./react-vendor-BdyZmpPe.js";import{c as n}from"./index-Cp7Ff9NP.js";const a=t.forwardRef(({className:e,type:o,...r},s)=>i.jsx("input",{type:o,className:n("flex h-9 w-full rounded-md border border-input bg-background px-3 py-1 text-sm shadow-sm transition-colors file:border-0 file:bg-transparent file:text-sm file:font-medium 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:s,...r}));a.displayName="Input";export{a as I};