feat(pwa): better PWA detection

frontend/src/components/Layout/AppLayout.tsx

@@ -46,6 +46,8 @@ import GlobalSearchBar from '../GlobalSearchBar';
 import ThemeToggle from '../ThemeToggle/ThemeToggle';
 import NotificationPanel from '../Notifications/NotificationPanel';
 import LanguageSwitcher from '../LanguageSwitcher';
+import BottomNavigation from './BottomNavigation';
+import { usePWA } from '../../hooks/usePWA';
 import { useTranslation } from 'react-i18next';
 
 const drawerWidth = 280;
@@ -80,6 +82,7 @@ const getNavigationItems = (t: (key: string) => string): NavigationItem[] => [
 const AppLayout: React.FC<AppLayoutProps> = ({ children }) => {
   const theme = useMuiTheme();
   const isMobile = useMediaQuery(theme.breakpoints.down('md'));
+  const isPWA = usePWA();
   const [mobileOpen, setMobileOpen] = useState<boolean>(false);
   const [anchorEl, setAnchorEl] = useState<null | HTMLElement>(null);
   const [notificationAnchorEl, setNotificationAnchorEl] = useState<null | HTMLElement>(null);
@@ -660,7 +663,11 @@ const AppLayout: React.FC<AppLayoutProps> = ({ children }) => {
         }}
       >
         <Toolbar />
-        <Box sx={{ p: 3 }}>
+        <Box sx={{
+          p: 3,
+          // Add bottom padding when bottom nav is visible (PWA mode on mobile)
+          pb: isPWA && isMobile ? 'calc(64px + 24px + env(safe-area-inset-bottom, 0px))' : 3,
+        }}>
           {children}
         </Box>
       </Box>
@@ -670,6 +677,9 @@ const AppLayout: React.FC<AppLayoutProps> = ({ children }) => {
         anchorEl={notificationAnchorEl}
         onClose={handleNotificationClose}
       />
+
+      {/* Bottom Navigation (PWA only) */}
+      <BottomNavigation />
     </Box>
   );
 };

frontend/src/pages/DocumentsPage.tsx

@@ -1,4 +1,4 @@
-import React, { useState, useEffect } from 'react';
+import React, { useState, useEffect, useCallback, useRef } from 'react';
 import { useNavigate } from 'react-router-dom';
 import { useTranslation } from 'react-i18next';
 import {
@@ -108,6 +108,7 @@ const DocumentsPage: React.FC = () => {
   const [error, setError] = useState<string | null>(null);
   const [viewMode, setViewMode] = useState<ViewMode>('grid');
   const [searchQuery, setSearchQuery] = useState<string>('');
+  const [debouncedSearchQuery, setDebouncedSearchQuery] = useState<string>('');
   const [sortBy, setSortBy] = useState<SortField>('created_at');
   const [sortOrder, setSortOrder] = useState<SortOrder>('desc');
   const [ocrFilter, setOcrFilter] = useState<string>('');
@@ -140,16 +141,48 @@ const DocumentsPage: React.FC = () => {
   const [retryHistoryModalOpen, setRetryHistoryModalOpen] = useState<boolean>(false);
   const [selectedDocumentForHistory, setSelectedDocumentForHistory] = useState<string | null>(null);
 
+  // Debounce search query to avoid making too many requests
+  useEffect(() => {
+    const timer = setTimeout(() => {
+      setDebouncedSearchQuery(searchQuery);
+      // Reset to first page when search query changes
+      if (searchQuery !== debouncedSearchQuery) {
+        setPagination(prev => ({ ...prev, offset: 0 }));
+      }
+    }, 300); // 300ms debounce delay
+
+    return () => clearTimeout(timer);
+  }, [searchQuery]);
+
   useEffect(() => {
     fetchDocuments();
     fetchLabels();
-  }, [pagination?.limit, pagination?.offset, ocrFilter]);
+  }, [pagination?.limit, pagination?.offset, ocrFilter, debouncedSearchQuery]);
 
   const fetchDocuments = async (): Promise<void> => {
     if (!pagination) return;
 
     try {
       setLoading(true);
+
+      // If there's a search query, use the search API to search all documents
+      if (debouncedSearchQuery.trim()) {
+        const response = await documentService.enhancedSearch({
+          query: debouncedSearchQuery.trim(),
+          limit: pagination.limit,
+          offset: pagination.offset,
+          include_snippets: false,
+        });
+
+        setDocuments(response.data.documents || []);
+        setPagination({
+          total: response.data.total || 0,
+          limit: pagination.limit,
+          offset: pagination.offset,
+          has_more: (pagination.offset + pagination.limit) < (response.data.total || 0)
+        });
+      } else {
+        // Otherwise, use normal pagination to list recent documents
         const response = await documentService.listWithPagination(
           pagination.limit,
           pagination.offset,
@@ -158,6 +191,7 @@ const DocumentsPage: React.FC = () => {
         // Backend returns wrapped object with documents and pagination
         setDocuments(response.data.documents || []);
         setPagination(response.data.pagination || { total: 0, limit: 20, offset: 0, has_more: false });
+      }
     } catch (err) {
       setError(t('common.status.error'));
       console.error(err);
@@ -263,12 +297,9 @@ const DocumentsPage: React.FC = () => {
     });
   };
 
-  const filteredDocuments = (documents || []).filter(doc =>
+  // No need for client-side filtering anymore - search is done on the server
-    doc.original_filename.toLowerCase().includes(searchQuery.toLowerCase()) ||
+  // When searchQuery is set, documents are already filtered by the server-side search API
-    doc.tags.some(tag => tag.toLowerCase().includes(searchQuery.toLowerCase()))
+  const sortedDocuments = [...(documents || [])].sort((a, b) => {
-  );
-
-  const sortedDocuments = [...filteredDocuments].sort((a, b) => {
     let aValue: any = a[sortBy];
     let bValue: any = b[sortBy];