polish(frontend): 侧栏与徽章可读性，智能悬停提示

降权全站字重；优化右栏公告/数据块；类型状态徽章用固定浅色区分；TipHost 仅在文案不一致、非文字或省略时显示。

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

frontend/components/home/WorkspaceNav.tsx

@@ -10,23 +10,14 @@ function boardHref(id: number) {
   return `/?board=${id}`;
 }
 
-// 桌面左栏：发帖 CTA + 板块导航 + 登录态快捷入口
-export function WorkspaceNav({ boards, user }: { boards: BoardWithCount[]; user: User | null }) {
+// 桌面左栏：板块导航
+export function WorkspaceNav({ boards }: { boards: BoardWithCount[]; user?: User | null }) {
   const params = useSearchParams();
   const activeBoard = Number(params.get("board")) || 0;
-  const composePath =
-    activeBoard > 0 ? `/compose?board=${activeBoard}` : "/compose";
-  const composeHref = user
-    ? composePath
-    : `/login?redirect=${encodeURIComponent(composePath)}`;
 
   return (
     <nav className="hidden lg:block w-56 xl:w-60 shrink-0" aria-label="工作台导航">
       <div className="sticky top-24 space-y-5">
-        <Link href={composeHref} className="btn btn-primary w-full justify-center">
-          <PenSquare size={16} /> 发起讨论
-        </Link>
-
         {/* 「全部讨论」是重置筛选的动作入口，与板块目录分区展示；卡片样式与下方板块一致 */}
         <div className="space-y-0.5">
           <Link href="/" className="j13-bcard" aria-current={activeBoard === 0 ? "page" : undefined}>
@@ -37,7 +28,7 @@ export function WorkspaceNav({ boards, user }: { boards: BoardWithCount[]; user:
             >
               <Home size={16} />
             </span>
-            <span className="j13-bcard-name flex-1 truncate text-[13px] font-bold">
+            <span className="j13-bcard-name flex-1 truncate text-[14px]">
               全部讨论
             </span>
           </Link>
@@ -48,7 +39,7 @@ export function WorkspaceNav({ boards, user }: { boards: BoardWithCount[]; user:
         <div>
           <Link
             href="/boards"
-            className="group px-1 mb-2 flex items-center justify-between text-[11.5px] font-bold tracking-[0.08em] uppercase text-[var(--ink-3)] hover:text-[var(--accent)] transition-colors"
+            className="group px-1 mb-2 flex items-center justify-between text-[11.5px] font-medium tracking-[0.08em] uppercase text-[var(--ink-3)] hover:text-[var(--accent)] transition-colors"
             aria-label="进入板块目录列表页"
           >
             <span className="flex items-center">
@@ -60,7 +51,7 @@ export function WorkspaceNav({ boards, user }: { boards: BoardWithCount[]; user:
               />
             </span>
             {boards.length > 0 && (
-              <span className="tracking-normal font-semibold tabular-nums">{boards.length} 个</span>
+              <span className="tracking-normal tabular-nums">{boards.length} 个</span>
             )}
           </Link>
           <div className="space-y-2">
@@ -76,7 +67,7 @@ export function WorkspaceNav({ boards, user }: { boards: BoardWithCount[]; user:
                   {b.name.slice(0, 1)}
                 </span>
                 <span className="min-w-0 flex-1 flex items-center justify-between gap-2">
-                  <span className="j13-bcard-name truncate text-[13px] font-bold">
+                  <span className="j13-bcard-name truncate text-[14px]">
                     {b.name}
                   </span>
                   <span className="meta shrink-0 text-[11px] tabular-nums">{b.post_count} 篇</span>