feat(quick-open): add SQL Library and SQL Files

apps/desktop/src/lib/sqlFile/sqlFileFolders.ts

@@ -0,0 +1,34 @@
+import { ref } from "vue";
+import { safeLocalStorageGet, safeLocalStorageSet } from "@/lib/backend/safeStorage";
+
+const STORAGE_KEY = "dbx-sql-file-folders";
+
+/**
+ * Shared reactive version counter — bumped whenever SQL file folder paths change.
+ * Components that cache folder contents (e.g. useQuickOpen) can watch this
+ * to know when they should re-read from localStorage and reload.
+ */
+export const sqlFileFoldersVersion = ref(0);
+
+/** Read the current list of SQL file folder paths from localStorage. */
+export function getSqlFileFolderPaths(): string[] {
+  try {
+    const raw = safeLocalStorageGet(STORAGE_KEY);
+    if (!raw) return [];
+    const parsed = JSON.parse(raw);
+    return Array.isArray(parsed) ? parsed.filter((p): p is string => typeof p === "string") : [];
+  } catch {
+    return [];
+  }
+}
+
+/** Persist folder paths to localStorage and notify subscribers. */
+export function saveSqlFileFolderPaths(paths: string[]): void {
+  safeLocalStorageSet(STORAGE_KEY, JSON.stringify(paths));
+  sqlFileFoldersVersion.value++;
+}
+
+/** Notify subscribers that folder contents may have changed (e.g. after refresh). */
+export function notifySqlFileFoldersChanged(): void {
+  sqlFileFoldersVersion.value++;
+}