feat(rvw): Complete RVW module development Phase 1-3

Summary:
- Migrate backend to modules/rvw with v2 API routes (/api/v2/rvw)
- Add new database fields: selectedAgents, editorialScore, methodologyStatus, picoExtract, isArchived
- Create frontend module in frontend-v2/src/modules/rvw
- Implement Dashboard with task list, filtering, batch operations
- Implement ReportDetail with dual tabs (editorial/methodology)
- Implement AgentModal for intelligent agent selection
- Register RVW module in moduleRegistry.ts
- Add navigation entry in TopNavigation
- Update documentation for RVW module status (v3.0)
- Update system status document (v2.9)

Features:
- User can select agents: editorial, methodology, or both
- Support batch task execution
- Task status filtering
- Replace console.log with logger service
- Maintain v1 API backward compatibility

Tested: Frontend and backend verified locally
Status: 85% complete (Phase 1-3 done)

frontend/src/pages/rvw/components/Header.tsx

@@ -0,0 +1,56 @@
+/**
+ * Dashboard头部组件
+ */
+import { useRef } from 'react';
+import { BrainCircuit, UploadCloud } from 'lucide-react';
+
+interface HeaderProps {
+  onUpload: (files: FileList) => void;
+}
+
+export default function Header({ onUpload }: HeaderProps) {
+  const fileInputRef = useRef<HTMLInputElement>(null);
+
+  const handleFileChange = (e: React.ChangeEvent<HTMLInputElement>) => {
+    if (e.target.files && e.target.files.length > 0) {
+      onUpload(e.target.files);
+      // 重置input以允许选择相同文件
+      e.target.value = '';
+    }
+  };
+
+  return (
+    <div className="flex justify-between items-center mb-6">
+      {/* Logo区域 */}
+      <div className="flex items-center gap-3">
+        <div className="bg-indigo-50 p-2 rounded-lg text-indigo-700">
+          <BrainCircuit className="w-6 h-6" />
+        </div>
+        <div>
+          <h1 className="text-xl font-bold text-slate-800">智能审稿系统</h1>
+          <p className="text-xs text-slate-500">当前工作区：编辑部初审组</p>
+        </div>
+      </div>
+      
+      {/* 上传按钮 */}
+      <div className="flex gap-3">
+        <input 
+          ref={fileInputRef}
+          type="file" 
+          multiple 
+          accept=".pdf,.doc,.docx"
+          className="hidden"
+          onChange={handleFileChange}
+        />
+        <button 
+          onClick={() => fileInputRef.current?.click()}
+          className="px-5 py-2.5 bg-indigo-600 hover:bg-indigo-700 text-white rounded-lg text-sm font-bold flex items-center gap-2 shadow-sm transition-all hover:-translate-y-0.5"
+        >
+          <UploadCloud className="w-4 h-4" />
+          上传新稿件
+        </button>
+      </div>
+    </div>
+  );
+}
+