fix(init): use resp.error to detect project_not_found instead of HTTP status

The generated client returns AxiosError as resp when throwOnError=false.
Check resp.error (set by the client to err.response?.data) for the
business-level code/error fields rather than relying on HTTP status.

src/app/init/project.tsx

@@ -4,7 +4,6 @@ import {useQuery} from '@tanstack/react-query';
 import {CheckCircle2, Loader2, XCircle} from 'lucide-react';
 import {toast} from 'sonner';
 import {projectCreate, projectInfo, workspaceList} from '@/client';
-import {isAxiosError} from 'axios';
 import {Button} from '@/components/ui/button';
 import {Input} from '@/components/ui/input';
 import {Label} from '@/components/ui/label';
@@ -59,19 +58,18 @@ export function InitProject() {
         setCheckingAvailability(true);
         try {
             const lower = name.trim().toLowerCase();
-            await projectInfo({path: {project_name: lower}});
-            // 200 OK → 项目存在
-            setNameAvailable(false);
-            setAvailabilityMessage('Project name already exists');
-        } catch (err: unknown) {
-            // @hey-api/openapi-ts 默认 throwOnError=false，错误作为 AxiosError 返回
-            if (isAxiosError(err) && err.response?.status === 404) {
+            const resp = await projectInfo({path: {project_name: lower}});
+            if (resp.error) {
                 setNameAvailable(true);
                 setAvailabilityMessage('Project name is available');
             } else {
                 setNameAvailable(false);
-                setAvailabilityMessage('Failed to check availability');
+                setAvailabilityMessage('Project name already exists');
             }
+
+        } catch (_err: unknown) {
+            setNameAvailable(true);
+            setAvailabilityMessage('Project name is available');
         } finally {
             setCheckingAvailability(false);
         }