diff --git a/src/components/KanbanBoard.tsx b/src/components/KanbanBoard.tsx
index bfe151c..9891702 100644
--- a/src/components/KanbanBoard.tsx
+++ b/src/components/KanbanBoard.tsx
@@ -49,21 +49,21 @@ export default function KanbanBoard({ projectId, projectSlug }: Props) {
     loadTasks(); 
     
     // Subscribe to WebSocket events for real-time updates
-    const unsubscribeCreated = wsClient.on("task.created", (data: any) => {
+    const unsubscribeCreated = wsClient.on("task.created", (data: Task) => {
       if (data.project_id === projectId) {
-        setTasks((prev) => [...prev, data as Task]);
+        setTasks((prev) => prev.some((t) => t.id === data.id) ? prev : [...prev, data]);
       }
     });
     
-    const unsubscribeUpdated = wsClient.on("task.updated", (data: any) => {
+    const unsubscribeUpdated = wsClient.on("task.updated", (data: Task) => {
       if (data.project_id === projectId) {
-        setTasks((prev) => prev.map((t) => t.id === data.id ? { ...t, ...data } : t));
+        setTasks((prev) => prev.map((t) => t.id === data.id ? data : t));
       }
     });
 
-    const unsubscribeAssigned = wsClient.on("task.assigned", (data: any) => {
+    const unsubscribeAssigned = wsClient.on("task.assigned", (data: Task) => {
       if (data.project_id === projectId) {
-        setTasks((prev) => prev.map((t) => t.id === data.id ? { ...t, assignee_id: data.assignee_id, assignee: data.assignee, assigned_at: data.assigned_at } : t));
+        setTasks((prev) => prev.map((t) => t.id === data.id ? data : t));
       }
     });
 
diff --git a/src/components/TaskModal.tsx b/src/components/TaskModal.tsx
index 98b7c4d..1340ca4 100644
--- a/src/components/TaskModal.tsx
+++ b/src/components/TaskModal.tsx
@@ -251,7 +251,7 @@ export default function TaskModal({ task, projectId: _projectId, projectSlug: _p
                   <div key={msg.id} className="text-sm">
                     <div className="flex items-center gap-1 text-xs text-[var(--muted)] mb-0.5">
                       <span>{AUTHOR_ICON[msg.author_type] || "👤"}</span>
-                      <span className="font-medium">{msg.author?.slug || msg.author_id}</span>
+                      <span className="font-medium">{msg.author_type === "system" ? "System" : (msg.author?.name || msg.author?.slug || "Unknown")}</span>
                       <span>·</span>
                       <span>{new Date(msg.created_at).toLocaleString("ru-RU", { hour: "2-digit", minute: "2-digit" })}</span>
                     </div>
diff --git a/src/lib/api.ts b/src/lib/api.ts
index 1887666..8e0fc73 100644
--- a/src/lib/api.ts
+++ b/src/lib/api.ts
@@ -60,12 +60,6 @@ export interface AgentConfig {
   model: string | null;
 }
 
-export interface MemberBrief {
-  id: string;
-  slug: string;
-  name: string;
-}
-
 export interface Member {
   id: string;
   slug: string;
@@ -214,8 +208,8 @@ export async function deleteTask(taskId: string): Promise<void> {
   await request(`/api/v1/tasks/${taskId}`, { method: "DELETE" });
 }
 
-export async function takeTask(taskId: string, slug: string): Promise<Task> {
-  return request(`/api/v1/tasks/${taskId}/take?slug=${slug}`, { method: "POST" });
+export async function takeTask(taskId: string): Promise<Task> {
+  return request(`/api/v1/tasks/${taskId}/take`, { method: "POST" });
 }
 
 export async function rejectTask(taskId: string, reason: string): Promise<{ok: boolean; reason: string; old_assignee: string}> {
@@ -232,12 +226,12 @@ export async function assignTask(taskId: string, assigneeId: string): Promise<Ta
   });
 }
 
-export async function watchTask(taskId: string, slug: string): Promise<{ok: boolean; watchers: string[]}> {
-  return request(`/api/v1/tasks/${taskId}/watch?slug=${slug}`, { method: "POST" });
+export async function watchTask(taskId: string): Promise<{ok: boolean; watcher_ids: string[]}> {
+  return request(`/api/v1/tasks/${taskId}/watch`, { method: "POST" });
 }
 
-export async function unwatchTask(taskId: string, slug: string): Promise<{ok: boolean; watchers: string[]}> {
-  return request(`/api/v1/tasks/${taskId}/watch?slug=${slug}`, { method: "DELETE" });
+export async function unwatchTask(taskId: string): Promise<{ok: boolean; watcher_ids: string[]}> {
+  return request(`/api/v1/tasks/${taskId}/watch`, { method: "DELETE" });
 }
 
 // --- Steps ---