fix: 修复首页统计数据字段映射错误

修正后端API字段名称:
- pass_rate_growth → monthly_pass_rate_growth
- issues_detected → monthly_detected_issues
- issues_growth → monthly_issues_growth

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

app/api/home/home.ts

@@ -88,12 +88,12 @@ interface BackendStatisticsResponse {
         is_up: boolean;
     };
     monthly_pass_rate: number;
-    pass_rate_growth: {
+    monthly_pass_rate_growth: {
         value: number;
         is_up: boolean;
     };
-    issues_detected: number;
-    issues_growth: {
+    monthly_detected_issues: number;
+    monthly_issues_growth: {
         value: number;
         is_up: boolean;
     };
@@ -172,13 +172,13 @@ export async function getHomeData(reviewType?: string | null, userId?: string |
             },
             monthlyPassRate: backendData.monthly_pass_rate,
             passRateGrowth: {
-                value: backendData.pass_rate_growth.value,
-                isUp: backendData.pass_rate_growth.is_up
+                value: backendData.monthly_pass_rate_growth.value,
+                isUp: backendData.monthly_pass_rate_growth.is_up
             },
-            issuesDetected: backendData.issues_detected,
+            issuesDetected: backendData.monthly_detected_issues,
             issuesGrowth: {
-                value: backendData.issues_growth.value,
-                isUp: backendData.issues_growth.is_up
+                value: backendData.monthly_issues_growth.value,
+                isUp: backendData.monthly_issues_growth.is_up
             }
         };
     } catch (error) {