feat: 题材/热点穿透页加入核心股追踪入口

Co-Authored-By: Claude <noreply@anthropic.com>

src/routes/hot-map.tsx

@@ -114,6 +114,13 @@ function HotMapPage() {
             >
               <RefreshCw className={`h-4 w-4 ${isFetching ? "animate-spin" : ""}`} />
             </button>
+            <Link
+              to="/core-stocks"
+              className="text-xs text-primary flex items-center gap-1 hover:opacity-80 transition-opacity whitespace-nowrap"
+            >
+              <Flame className="h-3.5 w-3.5" />
+              核心股
+            </Link>
           </div>
         </div>
 

src/routes/themes.tsx

@@ -71,6 +71,13 @@ function ThemesPage() {
               <Network className="h-3.5 w-3.5" />
               热点穿透
             </Link>
+            <Link
+              to="/core-stocks"
+              className="text-xs text-primary flex items-center gap-1 hover:opacity-80 transition-opacity"
+            >
+              <Flame className="h-3.5 w-3.5" />
+              核心股
+            </Link>
             <button
               onClick={() => refetch()}
               className="text-muted-foreground hover:text-foreground transition-colors"