feat: less completions

src/components/md-commander/hooks/useCommander.ts

@@ -264,7 +264,7 @@ export function useCommander(
   const [entries, setEntries] = createSignal<CommanderEntry[]>([]);
   const [showCompletions, setShowCompletions] = createSignal(false);
   const [completions, setCompletions] = createSignal<CompletionItem[]>([]);
-  const [selectedCompletion, setSelectedCompletion] = createSignal(0);
+  const [selectedCompletion, setSelectedCompletionState] = createSignal(0);
   const [isFocused, setIsFocused] = createSignal(false);
 
   // 命令历史
@@ -335,12 +335,30 @@ export function useCommander(
     const comps = getCompletions(input, commands);
     setCompletions(comps);
     setShowCompletions(comps.length > 0 && isFocused());
-    setSelectedCompletion(0);
+    setSelectedCompletionState(0);
+  };
+
+  const setSelectedCompletion = (v: number | ((prev: number) => number)) => {
+    const comps = completions();
+    const maxVisible = 3;
+    const maxIdx = Math.min(comps.length - 1, maxVisible - 1);
+    
+    if (typeof v === 'function') {
+      setSelectedCompletionState(prev => {
+        const next = v(prev);
+        return Math.max(0, Math.min(next, maxIdx));
+      });
+    } else {
+      setSelectedCompletionState(Math.max(0, Math.min(v, maxIdx)));
+    }
   };
 
   const acceptCompletion = () => {
     const idx = selectedCompletion();
-    const comp = completions()[idx];
+    const comps = completions();
+    // 确保索引在有效范围内
+    const validIdx = Math.min(idx, Math.min(comps.length - 1, 2));
+    const comp = comps[validIdx];
     if (!comp) return;
 
     const input = inputValue();