add slash command

frontend/src/components/ChatInterface.tsx

@@ -14,6 +14,7 @@ import rehypeRaw from 'rehype-raw';
 import { useLocation } from "react-router-dom";
 import { InlineVisualizationCard } from "./InlineVisualizationCard";
 import { useProjectStore } from "@/store/projectStore";
+import { SlashCommandMenu } from "./SlashCommandMenu";
 
 interface Message {
   id: string;
@@ -81,6 +82,74 @@ export function ChatInterface() {
   const location = useLocation();
   const { currentProject } = useProjectStore();
   
+  // Slash Command State
+  const [slashQuery, setSlashQuery] = useState<string | null>(null);
+  const [slashIndex, setSlashIndex] = useState(0);
+
+  const filteredSlashSkills = slashQuery !== null 
+    ? availableSkills.filter(s => s.name.toLowerCase().includes(slashQuery.toLowerCase()))
+    : [];
+  
+  const handleSelectSlashSkill = (skill: Skill) => {
+    if (!selectedSkillIds.includes(skill.id)) {
+      setSelectedSkillIds(prev => [...prev, skill.id]);
+    }
+    
+    // Remove the slash command from input
+    // Match the last occurrence of /query
+    const match = input.match(/(?:^|\s)\/([a-zA-Z0-9_\-]*)$/);
+    if (match && match.index !== undefined) {
+       // match[0] includes the leading space if present
+       const prefix = input.slice(0, match.index);
+       const suffix = input.slice(match.index + match[0].length);
+       setInput((prefix + suffix).trim());
+    }
+    setSlashQuery(null);
+  };
+
+  const handleInputKeyDown = (e: React.KeyboardEvent) => {
+    if (slashQuery !== null && filteredSlashSkills.length > 0) {
+      if (e.key === 'ArrowUp') {
+        e.preventDefault();
+        setSlashIndex(prev => Math.max(0, prev - 1));
+        return;
+      }
+      if (e.key === 'ArrowDown') {
+        e.preventDefault();
+        setSlashIndex(prev => Math.min(filteredSlashSkills.length - 1, prev + 1));
+        return;
+      }
+      if (e.key === 'Enter') {
+        e.preventDefault();
+        handleSelectSlashSkill(filteredSlashSkills[slashIndex]);
+        return;
+      }
+      if (e.key === 'Escape') {
+        e.preventDefault();
+        setSlashQuery(null);
+        return;
+      }
+    }
+    
+    if (e.key === 'Enter' && !isLoading) {
+      handleSend();
+    }
+  };
+
+  const handleInputChange = (e: React.ChangeEvent<HTMLInputElement>) => {
+    const val = e.target.value;
+    setInput(val);
+    
+    // Simple slash detection: if the last word starts with /
+    const match = val.match(/(?:^|\s)\/([a-zA-Z0-9_\-]*)$/);
+    if (match) {
+      setSlashQuery(match[1]);
+      setSlashIndex(0);
+    } else {
+      setSlashQuery(null);
+    }
+  };
+
   const setMessagesForSession = (sessionKey: string, updater: React.SetStateAction<Message[]>) => {
     setMessagesBySession(prev => {
       const current = prev[sessionKey] || [];
@@ -787,12 +856,19 @@ export function ChatInterface() {
                       <input
                         type="text"
                         value={input}
-                        onChange={(e) => setInput(e.target.value)}
-                        onKeyDown={(e) => e.key === 'Enter' && !isLoading && handleSend()}
+                        onChange={handleInputChange}
+                        onKeyDown={handleInputKeyDown}
                         placeholder="有问题，尽管问"
                         className="flex-1 bg-transparent border-none focus:ring-0 text-lg px-3 py-2 text-zinc-900 placeholder:text-zinc-300 outline-none"
                         disabled={isLoading}
                       />
+                      <SlashCommandMenu
+                        isOpen={slashQuery !== null}
+                        skills={filteredSlashSkills}
+                        selectedIndex={slashIndex}
+                        onSelect={handleSelectSlashSkill}
+                        onClose={() => setSlashQuery(null)}
+                      />
 
                       <div className="flex items-center gap-1">
                         <button
@@ -1019,12 +1095,19 @@ export function ChatInterface() {
                 <input
                   type="text"
                   value={input}
-                  onChange={(e) => setInput(e.target.value)}
-                  onKeyDown={(e) => e.key === 'Enter' && !isLoading && handleSend()}
+                  onChange={handleInputChange}
+                  onKeyDown={handleInputKeyDown}
                   placeholder="有问题，尽管问"
                   className="flex-1 bg-transparent border-none focus:ring-0 text-lg px-3 py-2 text-zinc-900 placeholder:text-zinc-300 outline-none"
                   disabled={isLoading}
                 />
+                <SlashCommandMenu
+                  isOpen={slashQuery !== null}
+                  skills={filteredSlashSkills}
+                  selectedIndex={slashIndex}
+                  onSelect={handleSelectSlashSkill}
+                  onClose={() => setSlashQuery(null)}
+                />
 
                 <div className="flex items-center gap-1">
                   <button

frontend/src/components/SlashCommandMenu.tsx

@@ -0,0 +1,69 @@
+import React, { useEffect, useRef } from 'react';
+import { cn } from "@/lib/utils";
+
+interface Skill {
+  id: string;
+  name: string;
+  description?: string;
+  type: string;
+}
+
+interface SlashCommandMenuProps {
+  isOpen: boolean;
+  skills: Skill[];
+  selectedIndex: number;
+  onSelect: (skill: Skill) => void;
+  onClose: () => void;
+}
+
+export function SlashCommandMenu({ isOpen, skills, selectedIndex, onSelect, onClose }: SlashCommandMenuProps) {
+  const menuRef = useRef<HTMLDivElement>(null);
+  const selectedRef = useRef<HTMLButtonElement>(null);
+
+  useEffect(() => {
+    if (isOpen && selectedRef.current) {
+      selectedRef.current.scrollIntoView({ block: 'nearest' });
+    }
+  }, [isOpen, selectedIndex]);
+
+  // Click outside to close
+  useEffect(() => {
+    const handleClickOutside = (event: MouseEvent) => {
+      if (menuRef.current && !menuRef.current.contains(event.target as Node)) {
+        onClose();
+      }
+    };
+    if (isOpen) {
+      document.addEventListener('mousedown', handleClickOutside);
+    }
+    return () => {
+      document.removeEventListener('mousedown', handleClickOutside);
+    };
+  }, [isOpen, onClose]);
+
+  if (!isOpen || skills.length === 0) return null;
+
+  return (
+    <div 
+      ref={menuRef}
+      className="absolute bottom-full left-0 mb-2 w-full max-w-md overflow-hidden rounded-xl border border-zinc-800 bg-zinc-950 shadow-2xl animate-in fade-in slide-in-from-bottom-2 duration-100 z-50"
+    >
+      <div className="max-h-[240px] overflow-y-auto py-1.5 custom-scrollbar">
+        {skills.map((skill, index) => (
+          <button
+            key={skill.id}
+            ref={index === selectedIndex ? selectedRef : null}
+            onClick={() => onSelect(skill)}
+            className={cn(
+              "w-full flex items-center gap-3 px-3 py-2.5 text-left text-sm transition-colors",
+              index === selectedIndex ? "bg-zinc-800" : "hover:bg-zinc-900"
+            )}
+          >
+            <span className="font-bold text-blue-400 shrink-0 font-mono">/{skill.name}</span>
+            <span className="text-zinc-400 truncate text-xs">{skill.description || "无描述"}</span>
+          </button>
+        ))}
+      </div>
+    </div>
+  );
+}