fix(report): stop listing reports via PostgREST JSON paths (BUG-574)

Staging PostgREST rejects the executiveSummary JSON-path alias, so GET /api/reports 500s. Persist a plain card_summary column from the Markdown excerpt instead.

Co-authored-by: Cursor <cursoragent@cursor.com>

frontend/src/app/api/reports/route.ts

@@ -28,6 +28,7 @@ import { loadReportCandidateRange } from "@/lib/report-candidate-range";
 import { createAdminSupabaseClient } from "@/lib/supabase/admin";
 import { authorizeUsage, completeUsage, releaseUsage } from "@/lib/consultation-billing";
 import { FeaturePricingError, resolveFeaturePricing } from "@/lib/feature-pricing";
+import { sanitizedErrorReason } from "@/lib/safe-error-reason";
 import { isSupabaseConfigurationError } from "@/lib/supabase/config";
 import { createServerSupabaseClient } from "@/lib/supabase/server";
 
@@ -45,7 +46,7 @@ const REPORT_LIST_COLUMNS = [
   "failure_code",
   "created_at",
   "completed_at",
-  "card_summary:report_document->executiveSummary->>summary",
+  "card_summary",
 ].join(",");
 
 function sanitizedErrorCode(error: unknown): string {
@@ -139,7 +140,7 @@ export async function GET() {
         { status: 503 },
       );
     }
-    console.error(`[reports] list failed reason=${sanitizedErrorCode(error)}`);
+    console.error(`[reports] list failed reason=${sanitizedErrorReason(error)}`);
     return NextResponse.json(
       { error: "报告列表暂时无法读取", code: REPORT_STABLE_CODES.generationFailed },
       { status: 500 },