feat(rvw): Complete Phase 4-5 - Bug fixes and Word export

Summary:
- Fix methodology score display issue in task list (show score instead of 'warn')
- Add methodology_score field to database schema
- Fix report display when only methodology agent is selected
- Implement Word document export using docx library
- Update documentation to v3.0/v3.1

Backend changes:
- Add methodologyScore to Prisma schema and TaskSummary type
- Update reviewWorker to save methodologyScore
- Update getTaskList to return methodologyScore

Frontend changes:
- Install docx and file-saver libraries
- Implement handleExportReport with Word generation
- Fix activeTab auto-selection based on available data
- Add proper imports for docx components

Documentation:
- Update RVW module status to 90% (Phase 1-5 complete)
- Update system status document to v3.0

Tested: All review workflows verified, Word export functional

frontend-v2/src/modules/rvw/components/ScoreRing.tsx

@@ -0,0 +1,38 @@
+/**
+ * 评分环组件
+ */
+
+interface ScoreRingProps {
+  score: number;
+  size?: 'small' | 'medium' | 'large';
+  showLabel?: boolean;
+}
+
+export default function ScoreRing({ score, size = 'medium', showLabel = true }: ScoreRingProps) {
+  const sizeStyles = {
+    small: 'w-12 h-12 text-lg border-4',
+    medium: 'w-20 h-20 text-2xl border-6',
+    large: 'w-24 h-24 text-3xl border-8',
+  };
+
+  const getScoreStatus = (score: number) => {
+    if (score >= 80) return { class: 'pass', label: 'Pass', bgColor: 'bg-green-50', borderColor: 'border-green-500', textColor: 'text-green-700' };
+    if (score >= 60) return { class: 'warn', label: 'Warning', bgColor: 'bg-amber-50', borderColor: 'border-amber-500', textColor: 'text-amber-700' };
+    return { class: 'fail', label: 'Fail', bgColor: 'bg-red-50', borderColor: 'border-red-500', textColor: 'text-red-700' };
+  };
+
+  const status = getScoreStatus(score);
+
+  return (
+    <div 
+      className={`rounded-full flex flex-col items-center justify-center ${sizeStyles[size]} ${status.bgColor} ${status.borderColor} ${status.textColor}`}
+      style={{ borderWidth: size === 'small' ? 4 : size === 'medium' ? 6 : 8 }}
+    >
+      <span className="font-bold">{score}</span>
+      {showLabel && size !== 'small' && (
+        <span className="text-[10px] font-bold uppercase">{status.label}</span>
+      )}
+    </div>
+  );
+}
+