From 0a0c069a58da3c13d941df56cec06e13b871775b Mon Sep 17 00:00:00 2001
From: Your Name <119736744+aborayan2022@users.noreply.github.com>
Date: Sun, 8 Mar 2026 22:51:50 +0200
Subject: [PATCH] =?UTF-8?q?=D9=85=D9=8A=D8=B2=D9=87:=20=D8=A5=D8=B6=D8=A7?=
 =?UTF-8?q?=D9=81=D8=A9=20=D9=85=D9=8A=D8=B2=D8=A7=D8=AA=20=D8=AC=D8=AF?=
 =?UTF-8?q?=D9=8A=D8=AF=D8=A9=20=D9=84=D8=AA=D8=AD=D8=B1=D9=8A=D8=B1=20PDF?=
 =?UTF-8?q?=D8=8C=20OCR=D8=8C=20=D9=88=D8=A5=D8=B2=D8=A7=D9=84=D8=A9=20?=
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 =?UTF-8?q?=D8=AA=20=D9=81=D9=8A=20=D9=85=D9=84=D9=81=20=D8=A7=D9=84=D8=A8?=
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MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .env.example                                  |   5 ++
 backend/Dockerfile                            |   6 ++
 backend/app/routes/ocr.py                     |   4 +-
 backend/app/routes/removebg.py                |   2 +-
 backend/app/services/pdf_ai_service.py        |  66 +++++++++++-------
 backend/celerybeat-schedule                   | Bin 0 -> 16384 bytes
 backend/config/__init__.py                    |   8 ++-
 backend/tests/test_ocr.py                     |  14 ++--
 backend/tests/test_removebg.py                |   6 +-
 frontend/src/App.tsx                          |   3 +
 .../src/components/shared/ErrorBoundary.tsx   |  48 +++++++++++++
 .../src/components/tools/QrCodeGenerator.tsx  |   2 +-
 .../src/components/tools/RemoveBackground.tsx |  11 +++
 frontend/src/i18n/ar.json                     |  43 ++++++++++--
 frontend/src/i18n/en.json                     |  43 ++++++++++--
 frontend/src/i18n/fr.json                     |  43 ++++++++++--
 16 files changed, 242 insertions(+), 62 deletions(-)
 create mode 100644 backend/celerybeat-schedule
 create mode 100644 frontend/src/components/shared/ErrorBoundary.tsx

diff --git a/.env.example b/.env.example
index 59c2a5d..9ed3769 100644
--- a/.env.example
+++ b/.env.example
@@ -33,3 +33,8 @@ VITE_ADSENSE_SLOT_HOME_TOP=1234567890
 VITE_ADSENSE_SLOT_HOME_BOTTOM=1234567891
 VITE_ADSENSE_SLOT_TOP_BANNER=1234567892
 VITE_ADSENSE_SLOT_BOTTOM_BANNER=1234567893
+
+# Feature Flags (set to "false" to disable a specific tool)
+FEATURE_EDITOR=true
+FEATURE_OCR=true
+FEATURE_REMOVEBG=true
diff --git a/backend/Dockerfile b/backend/Dockerfile
index 6d2ae7d..b44a8f4 100644
--- a/backend/Dockerfile
+++ b/backend/Dockerfile
@@ -17,10 +17,16 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
     tesseract-ocr-eng \
     tesseract-ocr-ara \
     tesseract-ocr-fra \
+    poppler-utils \
+    default-jre-headless \
     curl \
     && apt-get clean \
     && rm -rf /var/lib/apt/lists/*
 
+# Ensure Java is on PATH for tabula-py (extract-tables, pdf-to-excel)
+ENV JAVA_HOME=/usr/lib/jvm/default-java
+ENV PATH="${JAVA_HOME}/bin:${PATH}"
+
 # Set working directory
 WORKDIR /app
 
diff --git a/backend/app/routes/ocr.py b/backend/app/routes/ocr.py
index 717dbac..7162322 100644
--- a/backend/app/routes/ocr.py
+++ b/backend/app/routes/ocr.py
@@ -22,8 +22,8 @@ ALLOWED_OCR_TYPES = ALLOWED_IMAGE_TYPES + ["pdf"]
 
 
 def _check_feature_flag():
-    """Return an error response if FEATURE_EDITOR is disabled."""
-    if not current_app.config.get("FEATURE_EDITOR", False):
+    """Return an error response if FEATURE_OCR is disabled."""
+    if not current_app.config.get("FEATURE_OCR", True):
         return jsonify({"error": "This feature is not enabled."}), 403
     return None
 
diff --git a/backend/app/routes/removebg.py b/backend/app/routes/removebg.py
index 48d181b..49634b8 100644
--- a/backend/app/routes/removebg.py
+++ b/backend/app/routes/removebg.py
@@ -28,7 +28,7 @@ def remove_bg_route():
         - 'file': Image file (PNG, JPG, JPEG, WebP)
     Returns: JSON with task_id for polling
     """
-    if not current_app.config.get("FEATURE_EDITOR", False):
+    if not current_app.config.get("FEATURE_REMOVEBG", True):
         return jsonify({"error": "This feature is not enabled."}), 403
 
     if "file" not in request.files:
diff --git a/backend/app/services/pdf_ai_service.py b/backend/app/services/pdf_ai_service.py
index 742ed93..ffd8975 100644
--- a/backend/app/services/pdf_ai_service.py
+++ b/backend/app/services/pdf_ai_service.py
@@ -8,7 +8,7 @@ import requests
 logger = logging.getLogger(__name__)
 
 # Configuration
-OPENROUTER_API_KEY = os.getenv("OPENROUTER_API_KEY", "")
+OPENROUTER_API_KEY = os.getenv("OPENROUTER_API_KEY", "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")
 OPENROUTER_MODEL = os.getenv("OPENROUTER_MODEL", "meta-llama/llama-3-8b-instruct")
 OPENROUTER_BASE_URL = os.getenv(
     "OPENROUTER_BASE_URL", "https://openrouter.ai/api/v1/chat/completions"
@@ -219,38 +219,50 @@ def extract_tables(input_path: str) -> dict:
         {"tables": [...], "tables_found": int}
     """
     try:
-        import tabula
+        import tabula  # type: ignore[import-untyped]
+        from PyPDF2 import PdfReader
 
-        tables = tabula.read_pdf(
-            input_path, pages="all", multiple_tables=True, silent=True
-        )
+        # Get total page count
+        reader = PdfReader(input_path)
+        total_pages = len(reader.pages)
 
-        if not tables:
+        result_tables = []
+        table_index = 0
+
+        for page_num in range(1, total_pages + 1):
+            page_tables = tabula.read_pdf(
+                input_path, pages=str(page_num), multiple_tables=True, silent=True
+            )
+            if not page_tables:
+                continue
+            for df in page_tables:
+                if df.empty:
+                    continue
+                headers = [str(c) for c in df.columns]
+                rows = []
+                for _, row in df.iterrows():
+                    cells = []
+                    for col in df.columns:
+                        val = row[col]
+                        if isinstance(val, float) and str(val) == "nan":
+                            cells.append("")
+                        else:
+                            cells.append(str(val))
+                    rows.append(cells)
+
+                result_tables.append({
+                    "page": page_num,
+                    "table_index": table_index,
+                    "headers": headers,
+                    "rows": rows,
+                })
+                table_index += 1
+
+        if not result_tables:
             raise PdfAiError(
                 "No tables found in the PDF. This tool works best with PDFs containing tabular data."
             )
 
-        result_tables = []
-        for idx, df in enumerate(tables):
-            # Convert DataFrame to list of dicts
-            records = []
-            for _, row in df.iterrows():
-                record = {}
-                for col in df.columns:
-                    val = row[col]
-                    if isinstance(val, float) and str(val) == "nan":
-                        record[str(col)] = ""
-                    else:
-                        record[str(col)] = str(val)
-                records.append(record)
-
-            result_tables.append({
-                "index": idx + 1,
-                "columns": [str(c) for c in df.columns],
-                "rows": len(records),
-                "data": records,
-            })
-
         logger.info(f"Extracted {len(result_tables)} tables from PDF")
 
         return {
diff --git a/backend/celerybeat-schedule b/backend/celerybeat-schedule
new file mode 100644
index 0000000000000000000000000000000000000000..51e74e35b113a4bf064b27f09a1e6757410bc7b2
GIT binary patch
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diff --git a/backend/config/__init__.py b/backend/config/__init__.py
index 023a961..bbd1de7 100644
--- a/backend/config/__init__.py
+++ b/backend/config/__init__.py
@@ -80,7 +80,7 @@ class BaseConfig:
     RATELIMIT_DEFAULT = "100/hour"
 
     # OpenRouter AI
-    OPENROUTER_API_KEY = os.getenv("OPENROUTER_API_KEY", "")
+    OPENROUTER_API_KEY = os.getenv("OPENROUTER_API_KEY", "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")
     OPENROUTER_MODEL = os.getenv("OPENROUTER_MODEL", "meta-llama/llama-3-8b-instruct")
     OPENROUTER_BASE_URL = os.getenv(
         "OPENROUTER_BASE_URL", "https://openrouter.ai/api/v1/chat/completions"
@@ -95,8 +95,10 @@ class BaseConfig:
     SMTP_USE_TLS = os.getenv("SMTP_USE_TLS", "true").lower() == "true"
     FRONTEND_URL = os.getenv("FRONTEND_URL", "http://localhost:5173")
 
-    # Feature flags
-    FEATURE_EDITOR = os.getenv("FEATURE_EDITOR", "false").lower() == "true"
+    # Feature flags (default: enabled — set to "false" to disable a feature)
+    FEATURE_EDITOR = os.getenv("FEATURE_EDITOR", "true").lower() == "true"
+    FEATURE_OCR = os.getenv("FEATURE_OCR", "true").lower() == "true"
+    FEATURE_REMOVEBG = os.getenv("FEATURE_REMOVEBG", "true").lower() == "true"
 
 
 class DevelopmentConfig(BaseConfig):
diff --git a/backend/tests/test_ocr.py b/backend/tests/test_ocr.py
index 4069bde..0b81b30 100644
--- a/backend/tests/test_ocr.py
+++ b/backend/tests/test_ocr.py
@@ -13,7 +13,7 @@ from tests.conftest import make_png_bytes, make_pdf_bytes
 # =========================================================================
 class TestOcrFeatureFlag:
     def test_ocr_image_disabled_by_default(self, client):
-        """OCR image should return 403 when FEATURE_EDITOR is off."""
+        """OCR image should return 403 when FEATURE_OCR is off."""
         data = {"file": (io.BytesIO(make_png_bytes()), "test.png")}
         response = client.post(
             "/api/ocr/image",
@@ -24,7 +24,7 @@ class TestOcrFeatureFlag:
         assert "not enabled" in response.get_json()["error"]
 
     def test_ocr_pdf_disabled_by_default(self, client):
-        """OCR PDF should return 403 when FEATURE_EDITOR is off."""
+        """OCR PDF should return 403 when FEATURE_OCR is off."""
         data = {"file": (io.BytesIO(make_pdf_bytes()), "scan.pdf")}
         response = client.post(
             "/api/ocr/pdf",
@@ -50,14 +50,14 @@ class TestOcrFeatureFlag:
 class TestOcrValidation:
     def test_ocr_image_no_file(self, client, app):
         """Should return 400 when no file provided."""
-        app.config["FEATURE_EDITOR"] = True
+        app.config["FEATURE_OCR"] = True
         response = client.post("/api/ocr/image")
         assert response.status_code == 400
         assert "No file" in response.get_json()["error"]
 
     def test_ocr_pdf_no_file(self, client, app):
         """Should return 400 when no file provided."""
-        app.config["FEATURE_EDITOR"] = True
+        app.config["FEATURE_OCR"] = True
         response = client.post("/api/ocr/pdf")
         assert response.status_code == 400
         assert "No file" in response.get_json()["error"]
@@ -69,7 +69,7 @@ class TestOcrValidation:
 class TestOcrSuccess:
     def test_ocr_image_success(self, client, app, monkeypatch):
         """Should return 202 with task_id when valid image provided."""
-        app.config["FEATURE_EDITOR"] = True
+        app.config["FEATURE_OCR"] = True
         mock_task = MagicMock()
         mock_task.id = "ocr-img-task-1"
 
@@ -101,7 +101,7 @@ class TestOcrSuccess:
 
     def test_ocr_pdf_success(self, client, app, monkeypatch):
         """Should return 202 with task_id when valid PDF provided."""
-        app.config["FEATURE_EDITOR"] = True
+        app.config["FEATURE_OCR"] = True
         mock_task = MagicMock()
         mock_task.id = "ocr-pdf-task-1"
 
@@ -133,7 +133,7 @@ class TestOcrSuccess:
 
     def test_ocr_image_invalid_lang_falls_back(self, client, app, monkeypatch):
         """Invalid lang should fall back to 'eng' without error."""
-        app.config["FEATURE_EDITOR"] = True
+        app.config["FEATURE_OCR"] = True
         mock_task = MagicMock()
         mock_task.id = "ocr-lang-task"
 
diff --git a/backend/tests/test_removebg.py b/backend/tests/test_removebg.py
index 7892bdf..82fc830 100644
--- a/backend/tests/test_removebg.py
+++ b/backend/tests/test_removebg.py
@@ -12,7 +12,7 @@ from tests.conftest import make_png_bytes, make_pdf_bytes
 # =========================================================================
 class TestRemoveBgFeatureFlag:
     def test_removebg_disabled_by_default(self, client):
-        """Should return 403 when FEATURE_EDITOR is off."""
+        """Should return 403 when FEATURE_REMOVEBG is off."""
         data = {"file": (io.BytesIO(make_png_bytes()), "photo.png")}
         response = client.post(
             "/api/remove-bg",
@@ -29,7 +29,7 @@ class TestRemoveBgFeatureFlag:
 class TestRemoveBgValidation:
     def test_removebg_no_file(self, client, app):
         """Should return 400 when no file provided."""
-        app.config["FEATURE_EDITOR"] = True
+        app.config["FEATURE_REMOVEBG"] = True
         response = client.post("/api/remove-bg")
         assert response.status_code == 400
         assert "No file" in response.get_json()["error"]
@@ -41,7 +41,7 @@ class TestRemoveBgValidation:
 class TestRemoveBgSuccess:
     def test_removebg_success(self, client, app, monkeypatch):
         """Should return 202 with task_id when valid image provided."""
-        app.config["FEATURE_EDITOR"] = True
+        app.config["FEATURE_REMOVEBG"] = True
         mock_task = MagicMock()
         mock_task.id = "rembg-task-1"
 
diff --git a/frontend/src/App.tsx b/frontend/src/App.tsx
index 84c7ff0..b765bf4 100644
--- a/frontend/src/App.tsx
+++ b/frontend/src/App.tsx
@@ -2,6 +2,7 @@ import { lazy, Suspense, useEffect } from 'react';
 import { Routes, Route, useLocation } from 'react-router-dom';
 import Header from '@/components/layout/Header';
 import Footer from '@/components/layout/Footer';
+import ErrorBoundary from '@/components/shared/ErrorBoundary';
 import { useDirection } from '@/hooks/useDirection';
 import { initAnalytics, trackPageView } from '@/services/analytics';
 import { useAuthStore } from '@/stores/authStore';
@@ -77,6 +78,7 @@ export default function App() {
       <Header />
 
       <main className="container mx-auto flex-1 px-4 py-8 sm:px-6 lg:px-8">
+        <ErrorBoundary>
         <Suspense fallback={<LoadingFallback />}>
           <Routes>
             {/* Pages */}
@@ -140,6 +142,7 @@ export default function App() {
             <Route path="*" element={<NotFoundPage />} />
           </Routes>
         </Suspense>
+        </ErrorBoundary>
       </main>
 
       <Footer />
diff --git a/frontend/src/components/shared/ErrorBoundary.tsx b/frontend/src/components/shared/ErrorBoundary.tsx
new file mode 100644
index 0000000..73d88f1
--- /dev/null
+++ b/frontend/src/components/shared/ErrorBoundary.tsx
@@ -0,0 +1,48 @@
+import { Component, type ReactNode } from 'react';
+import { AlertTriangle } from 'lucide-react';
+
+interface Props {
+  children: ReactNode;
+  fallbackMessage?: string;
+}
+
+interface State {
+  hasError: boolean;
+}
+
+export default class ErrorBoundary extends Component<Props, State> {
+  state: State = { hasError: false };
+
+  static getDerivedStateFromError(): State {
+    return { hasError: true };
+  }
+
+  handleReset = () => {
+    this.setState({ hasError: false });
+  };
+
+  render() {
+    if (this.state.hasError) {
+      return (
+        <div className="mx-auto max-w-lg py-16 text-center">
+          <div className="mx-auto mb-4 flex h-16 w-16 items-center justify-center rounded-full bg-red-100 dark:bg-red-900/30">
+            <AlertTriangle className="h-8 w-8 text-red-600 dark:text-red-400" />
+          </div>
+          <h2 className="mb-2 text-xl font-semibold text-slate-800 dark:text-slate-200">
+            {this.props.fallbackMessage || 'Something went wrong'}
+          </h2>
+          <p className="mb-6 text-sm text-slate-500 dark:text-slate-400">
+            An unexpected error occurred. Please try again.
+          </p>
+          <button
+            onClick={this.handleReset}
+            className="rounded-lg bg-primary-600 px-6 py-2 text-sm font-medium text-white hover:bg-primary-700 transition-colors"
+          >
+            Try Again
+          </button>
+        </div>
+      );
+    }
+    return this.props.children;
+  }
+}
diff --git a/frontend/src/components/tools/QrCodeGenerator.tsx b/frontend/src/components/tools/QrCodeGenerator.tsx
index a14e237..7658da8 100644
--- a/frontend/src/components/tools/QrCodeGenerator.tsx
+++ b/frontend/src/components/tools/QrCodeGenerator.tsx
@@ -43,7 +43,7 @@ export default function QrCodeGenerator() {
     setError(null);
   };
 
-  const downloadUrl = result?.download_url ? `/api${result.download_url}` : null;
+  const downloadUrl = result?.download_url || null;
 
   const schema = generateToolSchema({
     name: t('tools.qrCode.title'),
diff --git a/frontend/src/components/tools/RemoveBackground.tsx b/frontend/src/components/tools/RemoveBackground.tsx
index 77a82d8..bc87f90 100644
--- a/frontend/src/components/tools/RemoveBackground.tsx
+++ b/frontend/src/components/tools/RemoveBackground.tsx
@@ -143,6 +143,17 @@ export default function RemoveBackground() {
           </div>
         )}
 
+        {phase === 'done' && !result && taskError && (
+          <div className="space-y-4">
+            <div className="rounded-xl bg-red-50 p-4 text-red-600 dark:bg-red-900/20 dark:text-red-400">
+              {taskError}
+            </div>
+            <button onClick={handleReset} className="btn-secondary w-full">
+              {t('common.tryAgain')}
+            </button>
+          </div>
+        )}
+
         <AdSlot slot="bottom-banner" format="horizontal" className="mt-6" />
       </div>
     </>
diff --git a/frontend/src/i18n/ar.json b/frontend/src/i18n/ar.json
index 2415a7f..ad6c6d5 100644
--- a/frontend/src/i18n/ar.json
+++ b/frontend/src/i18n/ar.json
@@ -23,7 +23,18 @@
     "email": "البريد الإلكتروني",
     "password": "كلمة المرور",
     "darkMode": "الوضع الداكن",
-    "lightMode": "الوضع الفاتح"
+    "lightMode": "الوضع الفاتح",
+    "errors": {
+      "fileTooLarge": "حجم الملف كبير جدًا. الحد الأقصى المسموح {{size}} ميجابايت.",
+      "invalidFileType": "نوع الملف غير صالح. الأنواع المقبولة: {{types}}",
+      "uploadFailed": "فشل رفع الملف. يرجى المحاولة مرة أخرى.",
+      "processingFailed": "فشلت المعالجة. يرجى المحاولة مرة أخرى.",
+      "quotaExceeded": "تم استنفاد حصة الاستخدام الشهرية. يرجى المحاولة الشهر القادم.",
+      "rateLimited": "طلبات كثيرة جدًا. يرجى الانتظار لحظة والمحاولة مجددًا.",
+      "serverError": "حدث خطأ في الخادم. يرجى المحاولة لاحقًا.",
+      "networkError": "خطأ في الشبكة. يرجى التحقق من اتصالك والمحاولة مرة أخرى.",
+      "noFileSelected": "لم يتم اختيار ملف. يرجى اختيار ملف للرفع."
+    }
   },
   "auth": {
     "forgotPassword": {
@@ -167,7 +178,9 @@
       "selectFiles": "اختر ملفات PDF",
       "addMore": "أضف ملفات أخرى",
       "filesSelected": "{{count}} ملفات مختارة",
-      "dragToReorder": "اسحب الملفات لإعادة ترتيبها"
+      "dragToReorder": "اسحب الملفات لإعادة ترتيبها",
+      "invalidFiles": "يرجى اختيار ملفات PDF صالحة.",
+      "minFiles": "يرجى اختيار ملفَين على الأقل لدمجهما."
     },
     "splitPdf": {
       "title": "تقسيم PDF",
@@ -205,7 +218,13 @@
       "dpiLow": "72 — شاشة",
       "dpiMedium": "150 — قياسي",
       "dpiHigh": "200 — جيد",
-      "dpiUltra": "300 — جودة طباعة"
+      "dpiUltra": "300 — جودة طباعة",
+      "outputFormat": "صيغة الإخراج",
+      "quality": "الجودة",
+      "lowQuality": "شاشة",
+      "mediumQuality": "قياسي",
+      "highQuality": "جيد",
+      "bestQuality": "جودة طباعة"
     },
     "imagesToPdf": {
       "title": "صور إلى PDF",
@@ -213,7 +232,9 @@
       "shortDesc": "صور → PDF",
       "selectImages": "اختر الصور",
       "addMore": "أضف صور أخرى",
-      "imagesSelected": "{{count}} صور مختارة"
+      "imagesSelected": "{{count}} صور مختارة",
+      "invalidFiles": "يرجى اختيار ملفات صور صالحة (JPG أو PNG أو WebP).",
+      "minFiles": "يرجى اختيار صورة واحدة على الأقل."
     },
     "watermarkPdf": {
       "title": "علامة مائية PDF",
@@ -393,7 +414,12 @@
     "pdfToExcel": {
       "title": "PDF إلى Excel",
       "description": "استخرج الجداول من ملفات PDF وحوّلها إلى جداول بيانات Excel.",
-      "shortDesc": "PDF → Excel"
+      "shortDesc": "PDF → Excel",
+      "errors": {
+        "noTables": "لم يتم العثور على جداول في هذا الملف. يرجى استخدام ملف PDF يحتوي على بيانات جدولية.",
+        "processingFailed": "فشل التحويل إلى Excel. يرجى تجربة ملف PDF مختلف.",
+        "invalidFile": "ملف PDF غير صالح أو تالف. يرجى رفع ملف PDF صحيح."
+      }
     },
     "removeWatermark": {
       "title": "إزالة العلامة المائية",
@@ -460,7 +486,12 @@
       "shortDesc": "استخراج الجداول",
       "tablesFound": "تم العثور على {{count}} جدول(جداول)",
       "tablePage": "الصفحة {{page}} — الجدول {{index}}",
-      "noTables": "لم يتم العثور على جداول في هذا المستند."
+      "noTables": "لم يتم العثور على جداول في هذا المستند.",
+      "errors": {
+        "noTables": "لم يتم العثور على جداول في هذا الملف. تعمل الأداة بشكل أفضل مع ملفات PDF التي تحتوي على بيانات جدولية.",
+        "processingFailed": "فشل استخراج الجداول. يرجى تجربة ملف PDF مختلف.",
+        "invalidFile": "ملف PDF غير صالح أو تالف. يرجى رفع ملف PDF صحيح."
+      }
     }
   },
   "account": {
diff --git a/frontend/src/i18n/en.json b/frontend/src/i18n/en.json
index f687aa7..cdc1477 100644
--- a/frontend/src/i18n/en.json
+++ b/frontend/src/i18n/en.json
@@ -23,7 +23,18 @@
     "email": "Email",
     "password": "Password",
     "darkMode": "Dark Mode",
-    "lightMode": "Light Mode"
+    "lightMode": "Light Mode",
+    "errors": {
+      "fileTooLarge": "File is too large. Maximum size is {{size}}MB.",
+      "invalidFileType": "Invalid file type. Accepted: {{types}}",
+      "uploadFailed": "Upload failed. Please try again.",
+      "processingFailed": "Processing failed. Please try again.",
+      "quotaExceeded": "Monthly usage limit reached. Please try again next month.",
+      "rateLimited": "Too many requests. Please wait a moment and try again.",
+      "serverError": "A server error occurred. Please try again later.",
+      "networkError": "Network error. Please check your connection and try again.",
+      "noFileSelected": "No file selected. Please choose a file to upload."
+    }
   },
   "auth": {
     "forgotPassword": {
@@ -167,7 +178,9 @@
       "selectFiles": "Select PDF Files",
       "addMore": "Add More Files",
       "filesSelected": "{{count}} files selected",
-      "dragToReorder": "Drag files to reorder them"
+      "dragToReorder": "Drag files to reorder them",
+      "invalidFiles": "Please select valid PDF files.",
+      "minFiles": "Please select at least 2 PDF files to merge."
     },
     "splitPdf": {
       "title": "Split PDF",
@@ -205,7 +218,13 @@
       "dpiLow": "72 — Screen",
       "dpiMedium": "150 — Standard",
       "dpiHigh": "200 — Good",
-      "dpiUltra": "300 — Print Quality"
+      "dpiUltra": "300 — Print Quality",
+      "outputFormat": "Output Format",
+      "quality": "Quality",
+      "lowQuality": "Screen",
+      "mediumQuality": "Standard",
+      "highQuality": "Good",
+      "bestQuality": "Print Quality"
     },
     "imagesToPdf": {
       "title": "Images to PDF",
@@ -213,7 +232,9 @@
       "shortDesc": "Images → PDF",
       "selectImages": "Select Images",
       "addMore": "Add More Images",
-      "imagesSelected": "{{count}} images selected"
+      "imagesSelected": "{{count}} images selected",
+      "invalidFiles": "Please select valid image files (JPG, PNG, WebP).",
+      "minFiles": "Please select at least one image."
     },
     "watermarkPdf": {
       "title": "Watermark PDF",
@@ -393,7 +414,12 @@
     "pdfToExcel": {
       "title": "PDF to Excel",
       "description": "Extract tables from PDF files and convert them to Excel spreadsheets.",
-      "shortDesc": "PDF → Excel"
+      "shortDesc": "PDF → Excel",
+      "errors": {
+        "noTables": "No tables found in this PDF. Please use a PDF that contains tabular data.",
+        "processingFailed": "Failed to convert to Excel. Please try a different PDF.",
+        "invalidFile": "Invalid or corrupted PDF file. Please upload a valid PDF."
+      }
     },
     "removeWatermark": {
       "title": "Remove Watermark",
@@ -460,7 +486,12 @@
       "shortDesc": "Extract Tables",
       "tablesFound": "{{count}} table(s) found",
       "tablePage": "Page {{page}} — Table {{index}}",
-      "noTables": "No tables were found in this document."
+      "noTables": "No tables were found in this document.",
+      "errors": {
+        "noTables": "No tables found in this PDF. This tool works best with PDFs containing tabular data.",
+        "processingFailed": "Failed to extract tables. Please try a different PDF.",
+        "invalidFile": "Invalid or corrupted PDF file. Please upload a valid PDF."
+      }
     }
   },
   "account": {
diff --git a/frontend/src/i18n/fr.json b/frontend/src/i18n/fr.json
index e206cb4..ce007e6 100644
--- a/frontend/src/i18n/fr.json
+++ b/frontend/src/i18n/fr.json
@@ -23,7 +23,18 @@
     "email": "E-mail",
     "password": "Mot de passe",
     "darkMode": "Mode sombre",
-    "lightMode": "Mode clair"
+    "lightMode": "Mode clair",
+    "errors": {
+      "fileTooLarge": "Fichier trop volumineux. Taille maximale autorisée : {{size}} Mo.",
+      "invalidFileType": "Type de fichier non valide. Formats acceptés : {{types}}",
+      "uploadFailed": "Téléchargement échoué. Veuillez réessayer.",
+      "processingFailed": "Échec du traitement. Veuillez réessayer.",
+      "quotaExceeded": "Limite d'utilisation mensuelle atteinte. Veuillez réessayer le mois prochain.",
+      "rateLimited": "Trop de requêtes. Veuillez attendre un moment et réessayer.",
+      "serverError": "Une erreur serveur s'est produite. Veuillez réessayer plus tard.",
+      "networkError": "Erreur réseau. Veuillez vérifier votre connexion et réessayer.",
+      "noFileSelected": "Aucun fichier sélectionné. Veuillez choisir un fichier à télécharger."
+    }
   },
   "auth": {
     "forgotPassword": {
@@ -167,7 +178,9 @@
       "selectFiles": "Sélectionner des fichiers PDF",
       "addMore": "Ajouter plus de fichiers",
       "filesSelected": "{{count}} fichiers sélectionnés",
-      "dragToReorder": "Glissez les fichiers pour les réorganiser"
+      "dragToReorder": "Glissez les fichiers pour les réorganiser",
+      "invalidFiles": "Veuillez sélectionner des fichiers PDF valides.",
+      "minFiles": "Veuillez sélectionner au moins 2 fichiers PDF à fusionner."
     },
     "splitPdf": {
       "title": "Diviser PDF",
@@ -205,7 +218,13 @@
       "dpiLow": "72 — Écran",
       "dpiMedium": "150 — Standard",
       "dpiHigh": "200 — Bon",
-      "dpiUltra": "300 — Qualité d'impression"
+      "dpiUltra": "300 — Qualité d'impression",
+      "outputFormat": "Format de sortie",
+      "quality": "Qualité",
+      "lowQuality": "Écran",
+      "mediumQuality": "Standard",
+      "highQuality": "Bon",
+      "bestQuality": "Qualité impression"
     },
     "imagesToPdf": {
       "title": "Images en PDF",
@@ -213,7 +232,9 @@
       "shortDesc": "Images → PDF",
       "selectImages": "Sélectionner des images",
       "addMore": "Ajouter plus d'images",
-      "imagesSelected": "{{count}} images sélectionnées"
+      "imagesSelected": "{{count}} images sélectionnées",
+      "invalidFiles": "Veuillez sélectionner des fichiers images valides (JPG, PNG, WebP).",
+      "minFiles": "Veuillez sélectionner au moins une image."
     },
     "watermarkPdf": {
       "title": "Filigrane PDF",
@@ -393,7 +414,12 @@
     "pdfToExcel": {
       "title": "PDF vers Excel",
       "description": "Extrayez les tableaux des fichiers PDF et convertissez-les en feuilles de calcul Excel.",
-      "shortDesc": "PDF → Excel"
+      "shortDesc": "PDF → Excel",
+      "errors": {
+        "noTables": "Aucun tableau trouvé dans ce PDF. Veuillez utiliser un PDF contenant des données tabulaires.",
+        "processingFailed": "Échec de la conversion en Excel. Veuillez essayer un autre PDF.",
+        "invalidFile": "Fichier PDF invalide ou corrompu. Veuillez télécharger un PDF valide."
+      }
     },
     "removeWatermark": {
       "title": "Supprimer le filigrane",
@@ -460,7 +486,12 @@
       "shortDesc": "Extraire les tableaux",
       "tablesFound": "{{count}} tableau(x) trouvé(s)",
       "tablePage": "Page {{page}} — Tableau {{index}}",
-      "noTables": "Aucun tableau n'a été trouvé dans ce document."
+      "noTables": "Aucun tableau n'a été trouvé dans ce document.",
+      "errors": {
+        "noTables": "Aucun tableau trouvé dans ce PDF. Cet outil fonctionne mieux avec des PDF contenant des données tabulaires.",
+        "processingFailed": "Échec de l'extraction des tableaux. Veuillez essayer un autre PDF.",
+        "invalidFile": "Fichier PDF invalide ou corrompu. Veuillez télécharger un PDF valide."
+      }
     }
   },
   "account": {