fix(ui): 5 项 E2E 测试 Bug 修复 — Agent 502 / 错误持久化 / 模型标记 / 侧面板 / 记忆页

- BUG-01: createFromTemplate 在 saas-relay 模式下 try-catch 跳过本地 Kernel
- BUG-02: upsertActiveConversation 持久化前剥离 error/streaming/optimistic 字段
- BUG-04: ModelSelector 添加 available 标记，ChatArea 追踪失败模型 ID
- BUG-05: VikingPanel 移除 status?.available 门控，不可用时 disabled + 重连按钮
- BUG-06: 侧面板 tooltip 改为"查看产物文件"，空状态增加图标和说明

desktop/src/store/agentStore.ts

@@ -233,16 +233,30 @@ export const useAgentStore = create<AgentStore>((set, get) => ({
         ?? 'default';
 
       // Step 2: Create clone with merged data from backend
-      const result = await client.createClone({
-        name: config.name,
-        emoji: config.emoji,
-        personality: config.personality,
-        scenarios: template.scenarios,
-        communicationStyle: config.communication_style,
-        model: resolvedModel,
-      });
-
-      const cloneId = result?.clone?.id;
+      // In saas-relay mode the local Kernel may not be running,
+      // so wrap createClone in a try-catch and skip gracefully.
+      let cloneId: string | undefined;
+      let freshClone: Clone | undefined;
+      try {
+        const result = await client.createClone({
+          name: config.name,
+          emoji: config.emoji,
+          personality: config.personality,
+          scenarios: template.scenarios,
+          communicationStyle: config.communication_style,
+          model: resolvedModel,
+        });
+        cloneId = result?.clone?.id;
+      } catch (cloneErr) {
+        log.warn('[AgentStore] createClone failed (likely saas-relay mode without local kernel):', cloneErr);
+        // In SaaS relay mode, the agent was already created server-side in Step 1.
+        // Just refresh the clone list from the server.
+        await get().loadClones();
+        freshClone = get().clones.find(c => c.name === config.name);
+        if (freshClone) {
+          cloneId = freshClone.id;
+        }
+      }
 
       if (cloneId) {
         // Persist SOUL.md via identity system
@@ -286,7 +300,15 @@ export const useAgentStore = create<AgentStore>((set, get) => ({
       await get().loadClones();
 
       // Return a fresh clone from the store (immutable — no in-place mutation)
-      const freshClone = get().clones.find((c) => c.id === cloneId);
+      const storedClone = get().clones.find((c) => c.id === cloneId);
+      if (storedClone) {
+        return {
+          ...storedClone,
+          ...(config.welcome_message ? { welcomeMessage: config.welcome_message } : {}),
+          ...(config.quick_commands?.length ? { quickCommands: config.quick_commands } : {}),
+        };
+      }
+      // Fallback: if clone was found by name earlier in the catch path
       if (freshClone) {
         return {
           ...freshClone,
@@ -294,7 +316,7 @@ export const useAgentStore = create<AgentStore>((set, get) => ({
           ...(config.quick_commands?.length ? { quickCommands: config.quick_commands } : {}),
         };
       }
-      return result?.clone as Clone | undefined;
+      return undefined;
     } catch (error) {
       set({ error: String(error) });
       return undefined;