feat: initial microservices project structure

Services:
- api: FastAPI gateway with JWT auth, async endpoints, WebSocket
- worker-gpu: CUDA sentence-transformers, FAISS IVFFlat, Ollama LLM
- worker-indexer: Winnowing+MinHash plagiarism detection, PDF/DOCX extraction
- worker-notifier: SMTP email notifications
- worker-gost: GOST 7.1-2003 and GOST R 7.0.5-2008 formatting

Infrastructure:
- docker-compose.yml (production) + docker-compose.dev.yml (hot reload)
- Nginx reverse proxy + WebSocket support
- PostgreSQL 16 with Alembic migrations
- Elasticsearch 8 with Russian/English analyzers
- MinIO, RabbitMQ, Redis, Ollama

Frontend:
- React 18 + Vite + TypeScript + TailwindCSS + Zustand + React Query v5
- 9 pages: Home, Search, Cabinet, Task, Check, Bibliography, Pricing, Login, Register

Scripts:
- Parser stubs: OpenAlex, КиберЛенинка, arXiv (Phase 0 - to be filled)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

services/frontend/src/pages/Check.tsx

@@ -0,0 +1,137 @@
+import React, { useState } from 'react';
+import { useNavigate } from 'react-router-dom';
+import { useMutation } from '@tanstack/react-query';
+import { Link } from 'react-router-dom';
+import { Shield, LayoutDashboard } from 'lucide-react';
+import toast from 'react-hot-toast';
+import { DropZone } from '../components/DropZone';
+import { documentsApi } from '../api/client';
+import { useAuthStore } from '../store/auth';
+import type { Task } from '../types';
+
+export function Check() {
+  const { isAuthenticated } = useAuthStore();
+  const navigate = useNavigate();
+  const [file, setFile] = useState<File | null>(null);
+  const [submittedTask, setSubmittedTask] = useState<Task | null>(null);
+
+  const upload = useMutation({
+    mutationFn: () => documentsApi.uploadForCheck(file!),
+    onSuccess: (response) => {
+      const task: Task = response.data;
+      setSubmittedTask(task);
+      toast.success('Файл загружен, проверка начата!');
+    },
+    onError: (error: any) => {
+      const msg = error.response?.data?.detail || 'Ошибка загрузки';
+      if (error.response?.status === 401) {
+        toast.error('Войдите для проверки плагиата');
+        navigate('/login');
+      } else {
+        toast.error(msg);
+      }
+    },
+  });
+
+  const handleSubmit = (e: React.FormEvent) => {
+    e.preventDefault();
+    if (!file) return;
+    if (!isAuthenticated) {
+      toast.error('Необходима авторизация');
+      navigate('/login');
+      return;
+    }
+    upload.mutate();
+  };
+
+  if (submittedTask) {
+    return (
+      <div className="max-w-xl mx-auto pt-8">
+        <div className="bg-white rounded-2xl border border-gray-100 p-8 text-center">
+          <div className="w-16 h-16 bg-green-50 rounded-2xl flex items-center justify-center mx-auto mb-4">
+            <Shield className="w-8 h-8 text-green-500" />
+          </div>
+          <h2 className="text-xl font-semibold text-gray-900 mb-2">Проверка запущена</h2>
+          <p className="text-gray-500 mb-2">
+            Файл <strong>{(submittedTask.input_data as any).filename}</strong> передан на проверку.
+          </p>
+          <p className="text-sm text-gray-400 mb-6">
+            Вы получите email когда проверка завершится. Обычно это занимает 1-3 минуты.
+          </p>
+          <div className="flex flex-col sm:flex-row gap-3 justify-center">
+            <Link
+              to={`/tasks/${submittedTask.id}`}
+              className="flex items-center justify-center gap-2 px-5 py-2.5 bg-brand-600 text-white rounded-lg text-sm font-medium hover:bg-brand-700 transition-colors"
+            >
+              Следить за прогрессом
+            </Link>
+            <Link
+              to="/cabinet"
+              className="flex items-center justify-center gap-2 px-5 py-2.5 border border-gray-200 text-gray-600 rounded-lg text-sm font-medium hover:bg-gray-50 transition-colors"
+            >
+              <LayoutDashboard className="w-4 h-4" />
+              Личный кабинет
+            </Link>
+          </div>
+        </div>
+      </div>
+    );
+  }
+
+  return (
+    <div className="max-w-2xl mx-auto">
+      <div className="mb-8">
+        <h1 className="text-2xl font-bold text-gray-900 mb-2">Проверка плагиата</h1>
+        <p className="text-gray-500">
+          Загрузите документ для проверки на 4 уровнях: точные совпадения, нечёткий поиск,
+          семантика и LLM-анализ парафраза.
+        </p>
+      </div>
+
+      <form onSubmit={handleSubmit} className="space-y-6">
+        <DropZone
+          onFile={setFile}
+          file={file}
+          onClear={() => setFile(null)}
+        />
+
+        {!isAuthenticated && (
+          <div className="bg-amber-50 border border-amber-200 rounded-xl p-4 text-sm text-amber-700">
+            <Link to="/login" className="underline font-medium">Войдите</Link> или{' '}
+            <Link to="/register" className="underline font-medium">зарегистрируйтесь</Link>{' '}
+            для проверки плагиата
+          </div>
+        )}
+
+        <button
+          type="submit"
+          disabled={!file || upload.isPending || !isAuthenticated}
+          className="w-full flex items-center justify-center gap-2 py-3 bg-brand-600 text-white rounded-xl font-medium hover:bg-brand-700 disabled:opacity-50 disabled:cursor-not-allowed transition-colors"
+        >
+          {upload.isPending ? (
+            <>
+              <Shield className="w-5 h-5 animate-pulse" />
+              Загрузка...
+            </>
+          ) : (
+            <>
+              <Shield className="w-5 h-5" />
+              Проверить на плагиат
+            </>
+          )}
+        </button>
+      </form>
+
+      {/* Описание уровней */}
+      <div className="mt-8 bg-gray-50 rounded-xl p-5">
+        <h3 className="text-sm font-semibold text-gray-700 mb-3">4 уровня проверки:</h3>
+        <div className="space-y-2 text-sm text-gray-500">
+          <div>1. <strong>Winnowing + MinHash</strong> — точные и нечёткие совпадения (~мс)</div>
+          <div>2. <strong>n-граммы + Jaccard</strong> — перестановки слов (~сек)</div>
+          <div>3. <strong>FAISS GPU cosine</strong> — семантическая близость (~мс)</div>
+          <div>4. <strong>Ollama Llama3</strong> — анализ парафраза (~2 сек)</div>
+        </div>
+      </div>
+    </div>
+  );
+}