feat: 新增设备巡检模块实现完整的巡检告警功能

新增设备巡检模块核心功能，包括：
- 巡检数据存储与调度系统
- 华为/H3C交换机及Linux服务器采集器
- 设备扩展配置与告警规则管理
- 主机详情页巡检配置入口
- 产品名称自定义设置功能
- 网络设备SSH exec通道兼容处理

application/state/useVaultState.ts

@@ -1490,9 +1490,19 @@ export const useVaultState = () => {
         const savedNoteGroups = localStorageAdapter.read<string[]>(STORAGE_KEY_NOTE_GROUPS);
 
         if (savedSnippets) {
-          const orderedSnippets = normalizeVaultOrder(savedSnippets);
-          snippetsRef.current = orderedSnippets;
-          setSnippets(orderedSnippets);
+          // Merge any INITIAL_SNIPPETS entries the user doesn't have yet.
+          // This lets pre-built script catalogs reach existing installations
+          // without requiring users to clear storage.
+          const existingIds = new Set(savedSnippets.map((s) => s.id));
+          const missing = INITIAL_SNIPPETS.filter((s) => !existingIds.has(s.id));
+          const merged = missing.length > 0
+            ? normalizeVaultOrder([...savedSnippets, ...missing])
+            : normalizeVaultOrder(savedSnippets);
+          if (missing.length > 0) {
+            localStorageAdapter.write(STORAGE_KEY_SNIPPETS, merged);
+          }
+          snippetsRef.current = merged;
+          setSnippets(merged);
           // Persist order backfill only when fields changed. Never rewrite the
           // pre-lock snapshot unlocked: another renderer can delete under the
           // vault lock after this read and before this write, resurrecting