Initial commit

src/components/chat/slash-command-menu.tsx

@@ -0,0 +1,57 @@
+"use client"
+
+import { useEffect, useRef } from "react"
+import { cn } from "@/lib/utils"
+import type { AvailableCommandInfo } from "@/lib/types"
+
+interface SlashCommandMenuProps {
+  commands: AvailableCommandInfo[]
+  selectedIndex: number
+  onSelect: (command: AvailableCommandInfo) => void
+}
+
+export function SlashCommandMenu({
+  commands,
+  selectedIndex,
+  onSelect,
+}: SlashCommandMenuProps) {
+  const listRef = useRef<HTMLDivElement>(null)
+
+  useEffect(() => {
+    const el = listRef.current?.children[selectedIndex] as
+      | HTMLElement
+      | undefined
+    el?.scrollIntoView({ block: "nearest" })
+  }, [selectedIndex])
+
+  if (commands.length === 0) return null
+
+  return (
+    <div
+      ref={listRef}
+      className="absolute bottom-full left-0 right-0 mb-1 z-50 max-h-48 overflow-y-auto rounded-xl border border-border bg-popover p-1 shadow-lg"
+    >
+      {commands.map((cmd, i) => (
+        <button
+          key={cmd.name}
+          type="button"
+          className={cn(
+            "flex w-full items-start gap-2 rounded-lg px-3 py-2 text-left text-sm",
+            i === selectedIndex
+              ? "bg-accent text-accent-foreground"
+              : "hover:bg-muted"
+          )}
+          onMouseDown={(e) => {
+            e.preventDefault()
+            onSelect(cmd)
+          }}
+        >
+          <span className="shrink-0 font-mono text-primary">/{cmd.name}</span>
+          <span className="truncate text-xs text-muted-foreground">
+            {cmd.description}
+          </span>
+        </button>
+      ))}
+    </div>
+  )
+}