diff --git a/src/persistence/drafts.ts b/src/persistence/drafts.ts
index 77db34d..a08eeb5 100644
--- a/src/persistence/drafts.ts
+++ b/src/persistence/drafts.ts
@@ -28,6 +28,30 @@ function isoOf(v: unknown): string {
   return v instanceof Date ? v.toISOString() : String(v);
 }
 
+/** JSONB 不能存 \u0000（空字符），而指标复合键用其作分隔符。存储时编码为私有区字符，读取时还原。 */
+const NUL = '\u0000';
+const NUL_SENTINEL = '\uE000';
+function deepReplace(value: unknown, from: string, to: string): unknown {
+  if (typeof value === 'string') return value.split(from).join(to);
+  if (Array.isArray(value)) return value.map((v) => deepReplace(v, from, to));
+  if (value !== null && typeof value === 'object') {
+    const out: Record<string, unknown> = {};
+    for (const [k, v] of Object.entries(value as Record<string, unknown>)) {
+      out[k.split(from).join(to)] = deepReplace(v, from, to);
+    }
+    return out;
+  }
+  return value;
+}
+/** 存库前编码（去除 \u0000）。 */
+function encodeForm(form: unknown): unknown {
+  return deepReplace(form ?? null, NUL, NUL_SENTINEL);
+}
+/** 读出后还原。 */
+function decodeForm(form: unknown): unknown {
+  return deepReplace(form ?? null, NUL_SENTINEL, NUL);
+}
+
 /** 列出草稿（可按 assessorId 过滤），不返回 form 大字段。 */
 export async function listDrafts(pool: pg.Pool, assessorId?: string): Promise<DraftSummary[]> {
   const where = assessorId ? 'WHERE assessor_id = $1' : '';
@@ -60,7 +84,7 @@ export async function getDraft(pool: pg.Pool, id: string): Promise<DraftRecord |
     assessorId: r.assessor_id != null ? String(r.assessor_id) : null,
     sourceAssessmentId: r.source_assessment_id != null ? String(r.source_assessment_id) : null,
     projectName: r.project_name != null ? String(r.project_name) : null,
-    form: r.form,
+    form: decodeForm(r.form),
     updatedAt: isoOf(r.updated_at),
   };
 }
@@ -90,7 +114,7 @@ export async function upsertDraft(pool: pg.Pool, input: UpsertDraftInput): Promi
       input.assessorId ?? null,
       input.sourceAssessmentId ?? null,
       input.projectName ?? null,
-      JSON.stringify(input.form ?? null),
+      JSON.stringify(encodeForm(input.form)),
     ],
   );
   const r = (res.rows as Array<Record<string, unknown>>)[0]!;
@@ -99,7 +123,7 @@ export async function upsertDraft(pool: pg.Pool, input: UpsertDraftInput): Promi
     assessorId: r.assessor_id != null ? String(r.assessor_id) : null,
     sourceAssessmentId: r.source_assessment_id != null ? String(r.source_assessment_id) : null,
     projectName: r.project_name != null ? String(r.project_name) : null,
-    form: r.form,
+    form: decodeForm(r.form),
     updatedAt: isoOf(r.updated_at),
   };
 }
diff --git a/src/server/index.ts b/src/server/index.ts
index 83960e9..72e1428 100644
--- a/src/server/index.ts
+++ b/src/server/index.ts
@@ -799,6 +799,7 @@ app.post('/api/assessments/run', async (c) => {
     });
   } catch (err) {
     const message = err instanceof Error ? err.message : '未知错误';
+    console.error('[run] 评估运行失败:', err instanceof Error ? err.stack ?? err.message : err);
     return c.json({ error: message }, 400);
   }
 });