feat: 流水线编辑器 Task 任务库增加搜索（按任务名/描述/参数过滤）

frontend/src/components/flow/PipelineFlowEditor.tsx

@@ -67,6 +67,7 @@ function FlowEditorInner({ pipelineId, saveSignal = 0, runSignal = 0 }: FlowEdit
   const [edges, setEdges, onEdgesChange] = useEdgesState<Edge>([]);
   const [catalogOpen, setCatalogOpen] = useState(true);
   const [selectedCategory, setSelectedCategory] = useState('all');
+  const [taskSearch, setTaskSearch] = useState('');
   const [selectedNode, setSelectedNode] = useState<Node<TektonNodeData> | null>(null);
   const [isRunning, setIsRunning] = useState(false);
   const [logOpen, setLogOpen] = useState(false);
@@ -255,9 +256,16 @@ function FlowEditorInner({ pipelineId, saveSignal = 0, runSignal = 0 }: FlowEdit
     setNodes((nds) => [...nds, newNode]);
   }, [nodes.length, setNodes]);
 
-  const filteredTasks = selectedCategory === 'all'
+  const filteredTasks = catalogTasks.filter((t) => {
-    ? catalogTasks
+    if (selectedCategory !== 'all' && t.category !== selectedCategory) return false;
-    : catalogTasks.filter((t) => t.category === selectedCategory);
+    if (!taskSearch.trim()) return true;
+    const q = taskSearch.trim().toLowerCase();
+    return (
+      t.name.toLowerCase().includes(q) ||
+      t.description.toLowerCase().includes(q) ||
+      t.params.some((p) => p.name.toLowerCase().includes(q))
+    );
+  });
 
   return (
     <div className="flex h-full" style={{ background: 'var(--canvas-bg)' }}>
@@ -269,6 +277,15 @@ function FlowEditorInner({ pipelineId, saveSignal = 0, runSignal = 0 }: FlowEdit
           <span className="text-[12px] font-semibold" style={{ color: 'var(--text-primary)' }}>Task 任务库</span>
           <span className="text-[10px] px-1.5 py-[1px] rounded font-medium" style={{ background: 'var(--panel-bg-secondary)', color: 'var(--text-tertiary)' }}>Tekton</span>
         </div>
+        <div className="px-2 pt-2">
+          <input
+            value={taskSearch}
+            onChange={(e) => setTaskSearch(e.target.value)}
+            placeholder="搜索任务/参数…"
+            className="w-full px-2 py-[5px] text-[11px] rounded-md border outline-none"
+            style={{ background: 'var(--panel-bg-secondary)', borderColor: 'var(--border-color-light)', color: 'var(--text-primary)' }}
+          />
+        </div>
         <div className="p-2 border-b" style={{ borderColor: 'var(--border-color)' }}>
           <div className="flex items-center gap-1 flex-wrap">
             <button onClick={() => setSelectedCategory('all')} className="text-[10px] px-2 py-[3px] rounded font-medium transition-colors" style={{ background: selectedCategory === 'all' ? 'var(--accent-blue)' : 'var(--panel-bg-secondary)', color: selectedCategory === 'all' ? '#fff' : 'var(--text-tertiary)' }}>全部</button>