Revert SSE streaming for PDF import, use synchronous flow

SSE streaming added unnecessary complexity and latency due to
buffering issues across Node.js event loop, Nginx proxy, and
Docker layers. Reverted to a simple synchronous request/response
for PDF conversion. Kept extractLlmErrorMessage for user-friendly
LLM errors, lazy-loaded pdf-parse, and extended Nginx timeout.

frontend/nginx.conf

@@ -3,7 +3,7 @@ server {
     root /usr/share/nginx/html;
     index index.html;
 
-    # Import endpoint — SSE streaming, long timeout, no buffering
+    # Import endpoint — long timeout for LLM processing
     location /api/import {
         proxy_pass http://family-budget-backend:3000;
         proxy_http_version 1.1;
@@ -14,8 +14,6 @@ server {
         proxy_cookie_path / /;
         proxy_connect_timeout 5s;
         proxy_read_timeout 600s;
-        proxy_buffering off;
-        gzip off;
         client_max_body_size 15m;
     }
 

frontend/src/App.tsx

@@ -1,6 +1,5 @@
 import { Routes, Route, Navigate } from 'react-router-dom';
 import { useAuth } from './context/AuthContext';
-import { ImportProvider } from './context/ImportContext';
 import { Layout } from './components/Layout';
 import { LoginPage } from './pages/LoginPage';
 import { HistoryPage } from './pages/HistoryPage';
@@ -19,16 +18,14 @@ export function App() {
   }
 
   return (
-    <ImportProvider>
-      <Layout>
-        <Routes>
-          <Route path="/" element={<Navigate to="/history" replace />} />
-          <Route path="/history" element={<HistoryPage />} />
-          <Route path="/analytics" element={<AnalyticsPage />} />
-          <Route path="/settings" element={<SettingsPage />} />
-          <Route path="*" element={<Navigate to="/history" replace />} />
-        </Routes>
-      </Layout>
-    </ImportProvider>
+    <Layout>
+      <Routes>
+        <Route path="/" element={<Navigate to="/history" replace />} />
+        <Route path="/history" element={<HistoryPage />} />
+        <Route path="/analytics" element={<AnalyticsPage />} />
+        <Route path="/settings" element={<SettingsPage />} />
+        <Route path="*" element={<Navigate to="/history" replace />} />
+      </Routes>
+    </Layout>
   );
 }

frontend/src/api/import.ts

@@ -11,74 +11,3 @@ export async function importStatement(
     formData,
   );
 }
-
-export interface SseProgressEvent {
-  stage: 'pdf' | 'llm' | 'import';
-  progress: number;
-  message: string;
-}
-
-export interface SseDoneEvent {
-  stage: 'done';
-  progress: 100;
-  result: ImportStatementResponse;
-}
-
-export interface SseErrorEvent {
-  stage: 'error';
-  message: string;
-}
-
-export type SseEvent = SseProgressEvent | SseDoneEvent | SseErrorEvent;
-
-export async function importStatementStream(
-  file: File,
-  onEvent: (event: SseEvent) => void,
-): Promise<void> {
-  const formData = new FormData();
-  formData.append('file', file);
-
-  const res = await fetch('/api/import/statement', {
-    method: 'POST',
-    body: formData,
-    credentials: 'include',
-  });
-
-  if (!res.ok) {
-    let msg = 'Ошибка импорта';
-    try {
-      const body = await res.json();
-      if (body.message) msg = body.message;
-    } catch { /* use default */ }
-    onEvent({ stage: 'error', message: msg });
-    return;
-  }
-
-  const reader = res.body?.getReader();
-  if (!reader) {
-    onEvent({ stage: 'error', message: 'Streaming не поддерживается' });
-    return;
-  }
-
-  const decoder = new TextDecoder();
-  let buffer = '';
-
-  while (true) {
-    const { done, value } = await reader.read();
-    if (done) break;
-
-    buffer += decoder.decode(value, { stream: true });
-
-    const lines = buffer.split('\n');
-    buffer = lines.pop() ?? '';
-
-    for (const line of lines) {
-      const trimmed = line.trim();
-      if (!trimmed.startsWith('data: ')) continue;
-      try {
-        const parsed = JSON.parse(trimmed.slice(6)) as SseEvent;
-        onEvent(parsed);
-      } catch { /* skip malformed lines */ }
-    }
-  }
-}

frontend/src/components/ImportModal.tsx

@@ -2,7 +2,6 @@ import { useState, useRef } from 'react';
 import type { ImportStatementResponse } from '@family-budget/shared';
 import { importStatement } from '../api/import';
 import { updateAccount } from '../api/accounts';
-import { useImport } from '../context/ImportContext';
 
 interface Props {
   onClose: () => void;
@@ -10,19 +9,13 @@ interface Props {
 }
 
 export function ImportModal({ onClose, onDone }: Props) {
-  const { importState, startImport, clearImport } = useImport();
-
-  const [jsonResult, setJsonResult] = useState<ImportStatementResponse | null>(null);
-  const [jsonError, setJsonError] = useState('');
-  const [jsonLoading, setJsonLoading] = useState(false);
+  const [result, setResult] = useState<ImportStatementResponse | null>(null);
+  const [error, setError] = useState('');
+  const [loading, setLoading] = useState(false);
   const [alias, setAlias] = useState('');
   const [aliasSaved, setAliasSaved] = useState(false);
   const fileRef = useRef<HTMLInputElement>(null);
 
-  const result = importState.result ?? jsonResult;
-  const error = importState.error || jsonError;
-  const loading = importState.active || jsonLoading;
-
   const handleFileChange = async (
     e: React.ChangeEvent<HTMLInputElement>,
   ) => {
@@ -35,45 +28,26 @@ export function ImportModal({ onClose, onDone }: Props) {
     const isJson = type === 'application/json' || name.endsWith('.json');
 
     if (!isPdf && !isJson) {
-      setJsonError('Допустимы только файлы PDF или JSON');
+      setError('Допустимы только файлы PDF или JSON');
       return;
     }
 
-    setJsonError('');
-    setJsonResult(null);
+    setLoading(true);
+    setError('');
+    setResult(null);
 
-    if (isPdf) {
-      startImport(file);
-      return;
-    }
-
-    setJsonLoading(true);
     try {
       const resp = await importStatement(file);
-      setJsonResult(resp);
+      setResult(resp);
     } catch (err: unknown) {
       const msg =
         err instanceof Error ? err.message : 'Ошибка импорта';
-      setJsonError(msg);
+      setError(msg);
     } finally {
-      setJsonLoading(false);
+      setLoading(false);
     }
   };
 
-  const handleClose = () => {
-    if (importState.active) {
-      if (window.confirm('Импорт продолжится в фоне. Закрыть окно?')) {
-        onClose();
-      }
-    } else {
-      onClose();
-    }
-  };
-
-  const handleDone = () => {
-    onDone();
-  };
-
   const handleSaveAlias = async () => {
     if (!result || !alias.trim()) return;
     try {
@@ -84,21 +58,12 @@ export function ImportModal({ onClose, onDone }: Props) {
     }
   };
 
-  const stageLabel = (stage: string) => {
-    switch (stage) {
-      case 'pdf': return 'Извлечение текста...';
-      case 'llm': return 'Конвертация через LLM...';
-      case 'import': return 'Сохранение в базу...';
-      default: return 'Обработка...';
-    }
-  };
-
   return (
-    <div className="modal-overlay" onClick={handleClose}>
+    <div className="modal-overlay" onClick={onClose}>
       <div className="modal" onClick={(e) => e.stopPropagation()}>
         <div className="modal-header">
           <h2>Импорт выписки</h2>
-          <button className="btn-close" onClick={handleClose}>
+          <button className="btn-close" onClick={onClose}>
             &times;
           </button>
         </div>
@@ -106,7 +71,7 @@ export function ImportModal({ onClose, onDone }: Props) {
         <div className="modal-body">
           {error && <div className="alert alert-error">{error}</div>}
 
-          {!result && !importState.active && (
+          {!result && (
             <div className="import-upload">
               <p>Выберите файл выписки (PDF или JSON, формат 1.0)</p>
               <input
@@ -115,30 +80,13 @@ export function ImportModal({ onClose, onDone }: Props) {
                 accept=".pdf,.json,application/pdf,application/json"
                 onChange={handleFileChange}
                 className="file-input"
-                disabled={loading}
               />
-              {jsonLoading && (
+              {loading && (
                 <div className="import-loading">Импорт...</div>
               )}
             </div>
           )}
 
-          {importState.active && (
-            <div className="import-upload">
-              <div className="import-progress-modal">
-                <div className="import-progress-modal-bar">
-                  <div
-                    className="import-progress-modal-fill"
-                    style={{ width: `${importState.progress}%` }}
-                  />
-                </div>
-                <p className="import-progress-modal-label">
-                  {stageLabel(importState.stage)} {importState.progress}%
-                </p>
-              </div>
-            </div>
-          )}
-
           {result && (
             <div className="import-result">
               <div className="import-result-icon" aria-hidden="true">✓</div>
@@ -201,15 +149,16 @@ export function ImportModal({ onClose, onDone }: Props) {
 
         <div className="modal-footer">
           {result ? (
-            <button className="btn btn-primary" onClick={handleDone}>
+            <button className="btn btn-primary" onClick={onDone}>
               Готово
             </button>
           ) : (
             <button
               className="btn btn-secondary"
-              onClick={handleClose}
+              onClick={onClose}
+              disabled={loading}
             >
-              {importState.active ? 'Свернуть' : 'Отмена'}
+              Отмена
             </button>
           )}
         </div>

frontend/src/components/Layout.tsx

@@ -1,70 +1,6 @@
-import { useState, useEffect, useRef, useCallback, type ReactNode } from 'react';
+import { useState, type ReactNode } from 'react';
 import { NavLink } from 'react-router-dom';
 import { useAuth } from '../context/AuthContext';
-import { useImport } from '../context/ImportContext';
-
-function ImportProgressBar() {
-  const { importState, clearImport, openModal } = useImport();
-  const [visible, setVisible] = useState(false);
-  const hideTimerRef = useRef<ReturnType<typeof setTimeout> | undefined>(undefined);
-
-  const isActive = importState.active;
-  const isDone = importState.stage === 'done';
-  const isError = importState.stage === 'error';
-  const showBar = isActive || isDone || isError;
-
-  useEffect(() => {
-    if (showBar) {
-      setVisible(true);
-      if (hideTimerRef.current) clearTimeout(hideTimerRef.current);
-    }
-    if (isDone || isError) {
-      hideTimerRef.current = setTimeout(() => {
-        setVisible(false);
-        clearImport();
-      }, 10_000);
-    }
-    return () => {
-      if (hideTimerRef.current) clearTimeout(hideTimerRef.current);
-    };
-  }, [showBar, isDone, isError, clearImport]);
-
-  const handleClick = useCallback(() => {
-    if (hideTimerRef.current) clearTimeout(hideTimerRef.current);
-    openModal();
-    setVisible(false);
-  }, [openModal]);
-
-  if (!visible) return null;
-
-  const barClass = isError
-    ? 'import-progress-bar import-progress-bar--error'
-    : isDone
-      ? 'import-progress-bar import-progress-bar--done'
-      : 'import-progress-bar';
-
-  const labelText = isError
-    ? `Ошибка импорта: ${importState.message}`
-    : isDone && importState.result
-      ? `Импорт завершён — ${importState.result.imported} операций`
-      : `${importState.message} ${importState.progress}%`;
-
-  return (
-    <div className={barClass}>
-      <div
-        className="import-progress-bar__fill"
-        style={{ width: `${isDone ? 100 : importState.progress}%` }}
-      />
-      <button
-        type="button"
-        className={`import-progress-label ${isDone || isError ? 'import-progress-label--clickable' : ''}`}
-        onClick={isDone || isError ? handleClick : undefined}
-      >
-        {labelText}
-      </button>
-    </div>
-  );
-}
 
 export function Layout({ children }: { children: ReactNode }) {
   const { user, logout } = useAuth();
@@ -74,8 +10,6 @@ export function Layout({ children }: { children: ReactNode }) {
 
   return (
     <div className="layout">
-      <ImportProgressBar />
-
       <button
         type="button"
         className="burger-btn"

frontend/src/context/ImportContext.tsx

@@ -1,114 +0,0 @@
-import {
-  createContext,
-  useContext,
-  useState,
-  useCallback,
-  useRef,
-  type ReactNode,
-} from 'react';
-import type { ImportStatementResponse } from '@family-budget/shared';
-import { importStatementStream, type SseEvent } from '../api/import';
-
-export interface ImportProgress {
-  active: boolean;
-  stage: string;
-  progress: number;
-  message: string;
-  result?: ImportStatementResponse;
-  error?: string;
-}
-
-interface ImportContextValue {
-  importState: ImportProgress;
-  showModal: boolean;
-  openModal: () => void;
-  closeModal: () => void;
-  startImport: (file: File) => void;
-  clearImport: () => void;
-}
-
-const INITIAL: ImportProgress = {
-  active: false,
-  stage: '',
-  progress: 0,
-  message: '',
-};
-
-const ImportContext = createContext<ImportContextValue | null>(null);
-
-export function ImportProvider({ children }: { children: ReactNode }) {
-  const [importState, setImportState] = useState<ImportProgress>(INITIAL);
-  const [showModal, setShowModal] = useState(false);
-  const runningRef = useRef(false);
-
-  const openModal = useCallback(() => setShowModal(true), []);
-  const closeModal = useCallback(() => setShowModal(false), []);
-
-  const startImport = useCallback((file: File) => {
-    if (runningRef.current) return;
-    runningRef.current = true;
-
-    setImportState({
-      active: true,
-      stage: 'pdf',
-      progress: 0,
-      message: 'Загрузка файла...',
-    });
-
-    importStatementStream(file, (event: SseEvent) => {
-      if (event.stage === 'done') {
-        setImportState({
-          active: false,
-          stage: 'done',
-          progress: 100,
-          message: 'Импорт завершён',
-          result: event.result,
-        });
-        runningRef.current = false;
-      } else if (event.stage === 'error') {
-        setImportState({
-          active: false,
-          stage: 'error',
-          progress: 0,
-          message: event.message,
-          error: event.message,
-        });
-        runningRef.current = false;
-      } else {
-        setImportState({
-          active: true,
-          stage: event.stage,
-          progress: event.progress,
-          message: event.message,
-        });
-      }
-    }).catch((err) => {
-      setImportState({
-        active: false,
-        stage: 'error',
-        progress: 0,
-        message: err instanceof Error ? err.message : 'Ошибка импорта',
-        error: err instanceof Error ? err.message : 'Ошибка импорта',
-      });
-      runningRef.current = false;
-    });
-  }, []);
-
-  const clearImport = useCallback(() => {
-    setImportState(INITIAL);
-  }, []);
-
-  return (
-    <ImportContext.Provider value={{
-      importState, showModal, openModal, closeModal, startImport, clearImport,
-    }}>
-      {children}
-    </ImportContext.Provider>
-  );
-}
-
-export function useImport(): ImportContextValue {
-  const ctx = useContext(ImportContext);
-  if (!ctx) throw new Error('useImport must be used within ImportProvider');
-  return ctx;
-}

frontend/src/pages/HistoryPage.tsx

@@ -18,7 +18,6 @@ import { TransactionTable } from '../components/TransactionTable';
 import { Pagination } from '../components/Pagination';
 import { EditTransactionModal } from '../components/EditTransactionModal';
 import { ImportModal } from '../components/ImportModal';
-import { useImport } from '../context/ImportContext';
 import { toISODate } from '../utils/format';
 
 const PARAM_KEYS = [
@@ -126,7 +125,7 @@ export function HistoryPage() {
   const [accounts, setAccounts] = useState<Account[]>([]);
   const [categories, setCategories] = useState<Category[]>([]);
   const [editingTx, setEditingTx] = useState<Transaction | null>(null);
-  const { showModal: showImport, openModal: openImport, closeModal: closeImport, clearImport } = useImport();
+  const [showImport, setShowImport] = useState(false);
 
   useEffect(() => {
     getAccounts().then(setAccounts).catch(() => {});
@@ -198,8 +197,7 @@ export function HistoryPage() {
   };
 
   const handleImportDone = () => {
-    closeImport();
-    clearImport();
+    setShowImport(false);
     fetchData();
     getAccounts().then(setAccounts).catch(() => {});
   };
@@ -210,7 +208,7 @@ export function HistoryPage() {
         <h1>История операций</h1>
         <button
           className="btn btn-primary"
-          onClick={openImport}
+          onClick={() => setShowImport(true)}
         >
           Импорт выписки
         </button>
@@ -264,7 +262,7 @@ export function HistoryPage() {
 
       {showImport && (
         <ImportModal
-          onClose={closeImport}
+          onClose={() => setShowImport(false)}
           onDone={handleImportDone}
         />
       )}

frontend/src/styles/index.css

@@ -1058,152 +1058,6 @@ textarea {
   font-weight: 500;
 }
 
-/* Import progress bar in modal */
-.import-progress-modal {
-  padding: 20px 0;
-}
-
-.import-progress-modal-bar {
-  height: 8px;
-  background: var(--color-border);
-  border-radius: 4px;
-  overflow: hidden;
-  margin-bottom: 10px;
-}
-
-.import-progress-modal-fill {
-  height: 100%;
-  background: linear-gradient(90deg, var(--color-primary), #6366f1);
-  border-radius: 4px;
-  transition: width 0.3s ease;
-  position: relative;
-}
-
-.import-progress-modal-fill::after {
-  content: '';
-  position: absolute;
-  inset: 0;
-  background: linear-gradient(
-    90deg,
-    transparent 0%,
-    rgba(255, 255, 255, 0.3) 50%,
-    transparent 100%
-  );
-  animation: shimmer 1.5s infinite;
-}
-
-.import-progress-modal-label {
-  text-align: center;
-  color: var(--color-text-secondary);
-  font-size: 14px;
-}
-
-/* ================================================================
-   Import progress bar (fixed top, Layout)
-   ================================================================ */
-
-.import-progress-bar {
-  position: fixed;
-  top: 0;
-  left: 0;
-  right: 0;
-  z-index: 300;
-  height: 4px;
-  background: var(--color-border);
-}
-
-.import-progress-bar--done {
-  background: var(--color-success-light);
-}
-
-.import-progress-bar--error {
-  background: var(--color-danger-light);
-}
-
-.import-progress-bar__fill {
-  height: 100%;
-  border-radius: 0 2px 2px 0;
-  transition: width 0.3s ease;
-  position: relative;
-  background: linear-gradient(90deg, var(--color-primary), #6366f1);
-}
-
-.import-progress-bar__fill::after {
-  content: '';
-  position: absolute;
-  inset: 0;
-  background: linear-gradient(
-    90deg,
-    transparent 0%,
-    rgba(255, 255, 255, 0.4) 50%,
-    transparent 100%
-  );
-  animation: shimmer 1.5s infinite;
-}
-
-.import-progress-bar--done .import-progress-bar__fill {
-  background: var(--color-success);
-}
-
-.import-progress-bar--done .import-progress-bar__fill::after {
-  animation: none;
-}
-
-.import-progress-bar--error .import-progress-bar__fill {
-  background: var(--color-danger);
-  width: 100% !important;
-}
-
-.import-progress-bar--error .import-progress-bar__fill::after {
-  animation: none;
-}
-
-@keyframes shimmer {
-  0% {
-    transform: translateX(-100%);
-  }
-  100% {
-    transform: translateX(100%);
-  }
-}
-
-.import-progress-label {
-  position: fixed;
-  top: 6px;
-  right: 16px;
-  z-index: 301;
-  background: var(--color-surface);
-  border: 1px solid var(--color-border);
-  border-radius: 16px;
-  padding: 4px 14px;
-  font-size: 12px;
-  font-weight: 500;
-  color: var(--color-text-secondary);
-  box-shadow: var(--shadow-sm);
-  white-space: nowrap;
-  cursor: default;
-  font-family: inherit;
-}
-
-.import-progress-label--clickable {
-  cursor: pointer;
-}
-
-.import-progress-label--clickable:hover {
-  background: var(--color-bg);
-  border-color: var(--color-border-hover);
-}
-
-.import-progress-bar--done .import-progress-label {
-  color: var(--color-success);
-  border-color: var(--color-success);
-}
-
-.import-progress-bar--error .import-progress-label {
-  color: var(--color-danger);
-  border-color: var(--color-danger);
-}
-
 /* ================================================================
    Tabs
    ================================================================ */