feat(rvw): Complete V2.0 Week 3 - Statistical validation extension and UX improvements

Week 3 Development Summary:

- Implement negative sign normalization (6 Unicode variants)

- Enhance T-test validation with smart sample size extraction

- Enhance SE triangle and CI-P consistency validation with subrow support

- Add precise sub-cell highlighting for P-values in multi-line cells

- Add frontend issue type Chinese translations (6 new types)

- Add file format tips for PDF/DOC uploads

Technical improvements:

- Add _clean_statistical_text() in extractor.py

- Add _safe_float() wrapper in validator.py

- Add ForensicsReport.tsx component

- Update ISSUE_TYPE_LABELS translations

Documentation:

- Add 2026-02-18 development record

- Update RVW module status (v5.1)

- Update system status (v5.2)

Status: Week 3 complete, ready for Week 4 testing
Co-authored-by: Cursor <cursoragent@cursor.com>

backend/src/modules/rvw/services/utils.ts

@@ -68,7 +68,7 @@ export function getMethodologyStatus(review: MethodologyReview | null | undefine
  * @param editorialScore 稿约规范性分数
  * @param methodologyScore 方法学分数
  * @param agents 选择的智能体
- * @returns 综合分数
+ * @returns 综合分数（保留1位小数）
  */
 export function calculateOverallScore(
   editorialScore: number | null | undefined,
@@ -78,18 +78,21 @@ export function calculateOverallScore(
   const hasEditorial = agents.includes('editorial') && editorialScore != null;
   const hasMethodology = agents.includes('methodology') && methodologyScore != null;
 
+  let score: number | null = null;
+
   if (hasEditorial && hasMethodology) {
     // 两个都选：稿约40% + 方法学60%
-    return editorialScore! * 0.4 + methodologyScore! * 0.6;
+    score = editorialScore! * 0.4 + methodologyScore! * 0.6;
   } else if (hasEditorial) {
     // 只选规范性
-    return editorialScore!;
+    score = editorialScore!;
   } else if (hasMethodology) {
     // 只选方法学
-    return methodologyScore!;
+    score = methodologyScore!;
   }
 
-  return null;
+  // 修复浮点数精度问题：保留1位小数
+  return score !== null ? Math.round(score * 10) / 10 : null;
 }
 
 /**