feat: add command palette with cross-board search and actions

src/components/boards/BoardList.tsx

@@ -1,4 +1,4 @@
-import { useState } from "react";
+import { useState, useEffect } from "react";
 import { Plus } from "lucide-react";
 import { Button } from "@/components/ui/button";
 import { useAppStore } from "@/stores/app-store";
@@ -9,6 +9,17 @@ export function BoardList() {
   const boards = useAppStore((s) => s.boards);
   const [dialogOpen, setDialogOpen] = useState(false);
 
+  // Listen for custom event to open new board dialog from command palette
+  useEffect(() => {
+    function handleOpenDialog() {
+      setDialogOpen(true);
+    }
+    document.addEventListener("open-new-board-dialog", handleOpenDialog);
+    return () => {
+      document.removeEventListener("open-new-board-dialog", handleOpenDialog);
+    };
+  }, []);
+
   if (boards.length === 0) {
     return (
       <>