fix: Agent 迭代数从未更新，始终显示 0/N

src/stores/agent-store.ts

@@ -105,6 +105,7 @@ interface AgentState {
   updateTokenUsage: (usage: Partial<TokenUsage>) => void;
   setProvider: (provider: string, model: string) => void;
   setMaxIterations: (max: number) => void;
+  setCurrentIteration: (n: number) => void;
   saveTraceData: () => void;
   clearMessages: () => void;
   abort: () => void;
@@ -305,6 +306,8 @@ export const useAgentStore = create<AgentState>((set, get) => ({
 
   setMaxIterations: (max) => set({ maxIterations: max }),
 
+  setCurrentIteration: (currentIteration) => set({ currentIteration }),
+
   saveTraceData: () => {
     const { currentSessionId, traceSteps, tokenUsage } = get();
     if (currentSessionId && window.metona?.sessions?.saveTrace) {