fix(connection): hide installed driver hint

src/lib/agentDriverInstallHint.ts

@@ -0,0 +1,15 @@
+import type { DatabaseType } from "@/types/database";
+import { supportsDriverManagement } from "./databaseCapabilities";
+
+export interface AgentDriverInstallState {
+  db_type: string;
+  installed: boolean;
+}
+
+export function showAgentDriverInstallHint(
+  dbType: DatabaseType | undefined,
+  drivers: readonly AgentDriverInstallState[],
+): boolean {
+  if (!supportsDriverManagement(dbType)) return false;
+  return drivers.find((driver) => driver.db_type === dbType)?.installed !== true;
+}