feat(desktop): add connection-level database browser

apps/desktop/src/components/objects/__tests__/DatabaseBrowserFallback.spec.ts

@@ -0,0 +1,11 @@
+import { readFileSync } from "node:fs";
+import { describe, expect, it } from "vitest";
+
+const source = readFileSync(new URL("../DatabaseBrowser.vue", import.meta.url), "utf8");
+
+describe("DatabaseBrowser metadata fallback", () => {
+  it("falls back to basic database names when extended metadata fails", () => {
+    expect(source).toMatch(/await api\.listDatabaseMetadata\(props\.connection\.id\)[\s\S]*?catch \(metadataError\)[\s\S]*?await api\.listDatabases\(props\.connection\.id\)/);
+    expect(source).toMatch(/catch \{\s*throw metadataError;\s*\}/);
+  });
+});