feat: add localStorage helpers for workflows directory

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/store/utils/localStorage.ts

@@ -20,6 +20,7 @@ export const RECENT_MODELS_KEY = "node-banana-recent-models";
 export const NODE_DEFAULTS_KEY = "node-banana-node-defaults";
 export const CANVAS_NAVIGATION_KEY = "node-banana-canvas-navigation";
 export const LAST_PROJECT_BASE_DIR_KEY = "node-banana-last-project-dir";
+export const WORKFLOWS_DIRECTORY_KEY = "node-banana-workflows-directory";
 
 // Maximum recent models to store (show 4 in UI, keep 8 for persistence)
 export const MAX_RECENT_MODELS = 8;
@@ -228,6 +229,17 @@ export const setLastProjectBaseDir = (dir: string): void => {
   localStorage.setItem(LAST_PROJECT_BASE_DIR_KEY, dir);
 };
 
+// Workflows directory helpers
+export const getWorkflowsDirectory = (): string | null => {
+  if (typeof window === "undefined") return null;
+  return localStorage.getItem(WORKFLOWS_DIRECTORY_KEY);
+};
+
+export const setWorkflowsDirectory = (path: string): void => {
+  if (typeof window === "undefined") return;
+  localStorage.setItem(WORKFLOWS_DIRECTORY_KEY, path);
+};
+
 // Workflow ID generator
 export const generateWorkflowId = (): string =>
   `wf_${Date.now()}_${Math.random().toString(36).substr(2, 9)}`;