feat: Document UI for directive orchestration with Lexical editor (#93)

* WIP: heartbeat checkpoint

* feat: soryu-co/soryu - makima: Save previous goal on update and include history in re-planning prompt

* feat: soryu-co/soryu - makima: Install Lexical and create base document editor component

* feat: soryu-co/soryu - makima: Create directive file system sidebar and document layout

* feat: soryu-co/soryu - makima: Create custom Lexical step diagram block

* feat: soryu-co/soryu - makima: Add context menu and goal auto-update integration

* WIP: heartbeat checkpoint

1 files changed, 23 insertions, 0 deletions

diff --git a/frontend/src/stores/index.ts b/frontend/src/stores/index.ts
index 58f461c..5ee9b08 100644
--- a/frontend/src/stores/index.ts
+++ b/frontend/src/stores/index.ts
@@ -36,6 +36,29 @@ export const skipIntroStore = atom<boolean>(
   })()
 )
 
+// Document UI feature flag
+export const documentUiEnabledStore = atom<boolean>(
+  (() => {
+    try {
+      const saved = localStorage.getItem('document_ui_enabled')
+      return saved === 'true'
+    } catch {
+      return false
+    }
+  })()
+)
+
+export const setDocumentUiEnabled = (enabled: boolean) => {
+  documentUiEnabledStore.set(enabled)
+  localStorage.setItem('document_ui_enabled', JSON.stringify(enabled))
+  // Persist to backend (fire-and-forget)
+  fetch('/api/v1/settings', {
+    method: 'PUT',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify({ key: 'document_ui_enabled', value: enabled }),
+  }).catch((err) => console.error('Failed to persist document_ui_enabled:', err))
+}
+
 // Actions
 export const login = () => {
   isLoggedInStore.set(true)