feat: document-mode directive UI proof of concept (Lexical) (#101)

* WIP: heartbeat checkpoint

* feat: soryu-co/soryu - makima: Backend: feature flag + goal-edit interrupt messaging

* WIP: heartbeat checkpoint

* WIP: heartbeat checkpoint

* feat: soryu-co/soryu - makima: Frontend: Lexical document editor with step blocks, context menu, countdown

1 files changed, 46 insertions, 0 deletions

diff --git a/makima/frontend/src/lib/api.ts b/makima/frontend/src/lib/api.ts
index d597b44..8896f2c 100644
--- a/makima/frontend/src/lib/api.ts
+++ b/makima/frontend/src/lib/api.ts
@@ -1696,6 +1696,52 @@ export async function deleteAccount(
 }
 
 // =============================================================================
+// User Settings (per-user feature flags)
+// =============================================================================
+
+/** Per-user settings / feature flags. */
+export interface UserSettings {
+  /** Whether the new "document mode" UI is enabled for this user. */
+  documentModeEnabled: boolean;
+}
+
+/** Request body for updating user settings. */
+export interface UpdateUserSettingsRequest {
+  documentModeEnabled: boolean;
+}
+
+/**
+ * Get the authenticated user's settings (feature flags).
+ */
+export async function getUserSettings(): Promise<UserSettings> {
+  const res = await authFetch(`${API_BASE}/api/v1/users/me/settings`);
+  if (!res.ok) {
+    const errorData = await res.json().catch(() => null);
+    const errorMessage = errorData?.message || res.statusText;
+    throw new Error(errorMessage);
+  }
+  return res.json();
+}
+
+/**
+ * Replace the authenticated user's settings (feature flags).
+ */
+export async function updateUserSettings(
+  req: UpdateUserSettingsRequest
+): Promise<UserSettings> {
+  const res = await authFetch(`${API_BASE}/api/v1/users/me/settings`, {
+    method: "PUT",
+    body: JSON.stringify(req),
+  });
+  if (!res.ok) {
+    const errorData = await res.json().catch(() => null);
+    const errorMessage = errorData?.message || res.statusText;
+    throw new Error(errorMessage);
+  }
+  return res.json();
+}
+
+// =============================================================================
 // Contract Types for Workflow Management
 // =============================================================================