diff --git a/docs/api-reference.md b/docs/api-reference.md
index 8cdd193..f158671 100644
--- a/docs/api-reference.md
+++ b/docs/api-reference.md
@@ -137,6 +137,22 @@ GET /api/auth/me
 Authorization: Bearer <jwt_token>
 ```
 
+#### OIDC Login (Redirect)
+
+```bash
+GET /api/auth/oidc/login
+```
+
+Redirects to the configured OIDC provider for authentication.
+
+#### OIDC Callback
+
+```bash
+GET /api/auth/oidc/callback?code=<auth_code>&state=<state>
+```
+
+Handles the callback from the OIDC provider and issues a JWT token.
+
 #### Logout
 
 ```bash
@@ -217,6 +233,128 @@ Content-Type: application/json
 }
 ```
 
+#### Get Document Debug Information
+
+```bash
+GET /api/documents/{id}/debug
+Authorization: Bearer <jwt_token>
+```
+
+Response:
+```json
+{
+  "document_id": "550e8400-e29b-41d4-a716-446655440000",
+  "processing_pipeline": {
+    "upload": "completed",
+    "ocr_queue": "completed", 
+    "ocr_processing": "completed",
+    "validation": "completed"
+  },
+  "ocr_details": {
+    "confidence": 89.5,
+    "word_count": 342,
+    "processing_time": 4.2
+  },
+  "file_info": {
+    "mime_type": "application/pdf",
+    "size": 1048576,
+    "pages": 3
+  }
+}
+```
+
+#### Get Document Thumbnail
+
+```bash
+GET /api/documents/{id}/thumbnail
+Authorization: Bearer <jwt_token>
+```
+
+#### Get Document OCR Text
+
+```bash
+GET /api/documents/{id}/ocr
+Authorization: Bearer <jwt_token>
+```
+
+#### Get Document Processed Image
+
+```bash
+GET /api/documents/{id}/processed-image
+Authorization: Bearer <jwt_token>
+```
+
+#### View Document in Browser
+
+```bash
+GET /api/documents/{id}/view
+Authorization: Bearer <jwt_token>
+```
+
+#### Get Failed Documents
+
+```bash
+GET /api/documents/failed?limit=50&offset=0
+Authorization: Bearer <jwt_token>
+```
+
+Query parameters:
+- `limit` - Number of results (default: 50)
+- `offset` - Pagination offset
+- `stage` - Filter by failure stage
+- `reason` - Filter by failure reason
+
+#### View Failed Document
+
+```bash
+GET /api/documents/failed/{id}/view
+Authorization: Bearer <jwt_token>
+```
+
+#### Get Duplicate Documents
+
+```bash
+GET /api/documents/duplicates?limit=50&offset=0
+Authorization: Bearer <jwt_token>
+```
+
+#### Delete Low Confidence Documents
+
+```bash
+POST /api/documents/delete-low-confidence
+Authorization: Bearer <jwt_token>
+Content-Type: application/json
+
+{
+  "confidence_threshold": 70.0,
+  "preview_only": false
+}
+```
+
+#### Delete Failed OCR Documents
+
+```bash
+POST /api/documents/delete-failed-ocr
+Authorization: Bearer <jwt_token>
+Content-Type: application/json
+
+{
+  "preview_only": false
+}
+```
+
+#### Bulk Delete Documents
+
+```bash
+DELETE /api/documents
+Authorization: Bearer <jwt_token>
+Content-Type: application/json
+
+{
+  "document_ids": ["550e8400-e29b-41d4-a716-446655440000", "..."]
+}
+```
+
 ### Search Endpoints
 
 #### Search Documents
@@ -301,10 +439,10 @@ Response:
 }
 ```
 
-#### Reprocess Document
+#### Retry OCR Processing
 
 ```bash
-POST /api/documents/{id}/reprocess
+POST /api/documents/{id}/retry-ocr
 Authorization: Bearer <jwt_token>
 ```
 
@@ -315,6 +453,53 @@ GET /api/queue/failed
 Authorization: Bearer <jwt_token>
 ```
 
+#### Get Queue Statistics
+
+```bash
+GET /api/queue/stats
+Authorization: Bearer <jwt_token>
+```
+
+Response:
+```json
+{
+  "pending_count": 15,
+  "processing_count": 3,
+  "failed_count": 2,
+  "completed_today": 127,
+  "average_processing_time_seconds": 4.5,
+  "queue_health": "healthy"
+}
+```
+
+#### Requeue Failed Items
+
+```bash
+POST /api/queue/requeue-failed
+Authorization: Bearer <jwt_token>
+```
+
+#### Enqueue Pending Documents
+
+```bash
+POST /api/queue/enqueue-pending
+Authorization: Bearer <jwt_token>
+```
+
+#### Pause OCR Processing
+
+```bash
+POST /api/queue/pause
+Authorization: Bearer <jwt_token>
+```
+
+#### Resume OCR Processing
+
+```bash
+POST /api/queue/resume
+Authorization: Bearer <jwt_token>
+```
+
 ### Settings Endpoints
 
 #### Get User Settings
@@ -391,6 +576,119 @@ POST /api/sources/{id}/sync
 Authorization: Bearer <jwt_token>
 ```
 
+#### Stop Source Sync
+
+```bash
+POST /api/sources/{id}/sync/stop
+Authorization: Bearer <jwt_token>
+```
+
+#### Test Source Connection
+
+```bash
+POST /api/sources/{id}/test
+Authorization: Bearer <jwt_token>
+```
+
+#### Estimate Source Crawl
+
+```bash
+POST /api/sources/{id}/estimate
+Authorization: Bearer <jwt_token>
+```
+
+#### Estimate Crawl with Configuration
+
+```bash
+POST /api/sources/estimate
+Authorization: Bearer <jwt_token>
+Content-Type: application/json
+
+{
+  "source_type": "webdav",
+  "config": {
+    "url": "https://example.com/webdav",
+    "username": "user",
+    "password": "pass"
+  }
+}
+```
+
+#### Test Connection with Configuration
+
+```bash
+POST /api/sources/test-connection
+Authorization: Bearer <jwt_token>
+Content-Type: application/json
+
+{
+  "source_type": "webdav", 
+  "config": {
+    "url": "https://example.com/webdav",
+    "username": "user",
+    "password": "pass"
+  }
+}
+```
+
+### WebDAV Endpoints
+
+#### Test WebDAV Connection
+
+```bash
+POST /api/webdav/test-connection
+Authorization: Bearer <jwt_token>
+Content-Type: application/json
+
+{
+  "url": "https://example.com/webdav",
+  "username": "user",
+  "password": "pass"
+}
+```
+
+#### Estimate WebDAV Crawl
+
+```bash
+POST /api/webdav/estimate-crawl
+Authorization: Bearer <jwt_token>
+Content-Type: application/json
+
+{
+  "url": "https://example.com/webdav",
+  "username": "user", 
+  "password": "pass"
+}
+```
+
+#### Get WebDAV Sync Status
+
+```bash
+GET /api/webdav/sync-status
+Authorization: Bearer <jwt_token>
+```
+
+#### Start WebDAV Sync
+
+```bash
+POST /api/webdav/start-sync
+Authorization: Bearer <jwt_token>
+Content-Type: application/json
+
+{
+  "url": "https://example.com/webdav",
+  "username": "user",
+  "password": "pass"
+}
+```
+
+#### Cancel WebDAV Sync
+
+```bash
+POST /api/webdav/cancel-sync
+Authorization: Bearer <jwt_token>
+```
+
 ### Labels Endpoints
 
 #### List Labels
@@ -469,30 +767,147 @@ DELETE /api/users/{id}
 Authorization: Bearer <jwt_token>
 ```
 
-## WebSocket API
+### Notifications Endpoints
 
-Connect to receive real-time updates:
+#### List Notifications
 
-```javascript
-const ws = new WebSocket('ws://localhost:8000/ws');
-
-ws.onmessage = (event) => {
-  const data = JSON.parse(event.data);
-  console.log('Event:', data);
-};
-
-// Authenticate
-ws.send(JSON.stringify({
-  type: 'auth',
-  token: 'your_jwt_token'
-}));
+```bash
+GET /api/notifications?limit=50&offset=0
+Authorization: Bearer <jwt_token>
 ```
 
-Event types:
-- `document.uploaded` - New document uploaded
-- `ocr.completed` - OCR processing completed
-- `ocr.failed` - OCR processing failed
-- `source.sync.completed` - Source sync finished
+#### Get Notification Summary
+
+```bash
+GET /api/notifications/summary
+Authorization: Bearer <jwt_token>
+```
+
+Response:
+```json
+{
+  "unread_count": 5,
+  "total_count": 23,
+  "latest_notification": {
+    "id": 1,
+    "type": "ocr_completed",
+    "message": "OCR processing completed for document.pdf",
+    "created_at": "2024-01-01T12:00:00Z"
+  }
+}
+```
+
+#### Mark Notification as Read
+
+```bash
+POST /api/notifications/{id}/read
+Authorization: Bearer <jwt_token>
+```
+
+#### Mark All Notifications as Read
+
+```bash
+POST /api/notifications/read-all
+Authorization: Bearer <jwt_token>
+```
+
+#### Delete Notification
+
+```bash
+DELETE /api/notifications/{id}
+Authorization: Bearer <jwt_token>
+```
+
+### Ignored Files Endpoints
+
+#### List Ignored Files
+
+```bash
+GET /api/ignored-files?limit=50&offset=0
+Authorization: Bearer <jwt_token>
+```
+
+Query parameters:
+- `limit` - Number of results (default: 50)
+- `offset` - Pagination offset
+- `filename` - Filter by filename
+- `source_type` - Filter by source type
+
+#### Get Ignored Files Statistics
+
+```bash
+GET /api/ignored-files/stats
+Authorization: Bearer <jwt_token>
+```
+
+Response:
+```json
+{
+  "total_ignored_files": 42,
+  "total_size_bytes": 104857600,
+  "most_recent_ignored_at": "2024-01-01T12:00:00Z"
+}
+```
+
+#### Get Ignored File Details
+
+```bash
+GET /api/ignored-files/{id}
+Authorization: Bearer <jwt_token>
+```
+
+#### Remove File from Ignored List
+
+```bash
+DELETE /api/ignored-files/{id}
+Authorization: Bearer <jwt_token>
+```
+
+#### Bulk Remove Files from Ignored List
+
+```bash
+DELETE /api/ignored-files/bulk-delete
+Authorization: Bearer <jwt_token>
+Content-Type: application/json
+
+{
+  "ignored_file_ids": [1, 2, 3, 4]
+}
+```
+
+### Metrics Endpoints
+
+#### Get System Metrics
+
+```bash
+GET /api/metrics
+Authorization: Bearer <jwt_token>
+```
+
+#### Get Prometheus Metrics
+
+```bash
+GET /metrics
+```
+
+Returns Prometheus-formatted metrics (no authentication required).
+
+### Health Check
+
+#### Health Check
+
+```bash
+GET /api/health
+```
+
+Response:
+```json
+{
+  "status": "healthy",
+  "timestamp": "2024-01-01T12:00:00Z",
+  "version": "1.0.0"
+}
+```
 
 ## Examples
 
@@ -602,7 +1017,12 @@ curl -X GET http://localhost:8000/api/documents/550e8400-e29b-41d4-a716-44665544
 
 The complete OpenAPI specification is available at:
 ```
-GET /api/openapi.json
+GET /api-docs/openapi.json
+```
+
+Interactive Swagger UI documentation is available at:
+```
+GET /swagger-ui
 ```
 
 You can use this with tools like Swagger UI or to generate client libraries.
diff --git a/frontend/src/components/Layout/AppLayout.tsx b/frontend/src/components/Layout/AppLayout.tsx
index 5855e11..454bb01 100644
--- a/frontend/src/components/Layout/AppLayout.tsx
+++ b/frontend/src/components/Layout/AppLayout.tsx
@@ -73,7 +73,6 @@ const navigationItems: NavigationItem[] = [
   { text: 'Watch Folder', icon: FolderIcon, path: '/watch' },
   { text: 'Document Management', icon: ManageIcon, path: '/documents/management' },
   { text: 'Ignored Files', icon: BlockIcon, path: '/ignored-files' },
-  { text: 'Debug', icon: BugReportIcon, path: '/debug' },
 ];
 
 const AppLayout: React.FC<AppLayoutProps> = ({ children }) => {
@@ -533,6 +532,9 @@ const AppLayout: React.FC<AppLayoutProps> = ({ children }) => {
             <MenuItem onClick={() => navigate('/settings')}>
               <SettingsIcon sx={{ mr: 2 }} /> Settings
             </MenuItem>
+            <MenuItem onClick={() => navigate('/debug')}>
+              <BugReportIcon sx={{ mr: 2 }} /> Debug
+            </MenuItem>
             <Divider />
             <MenuItem onClick={() => window.open('/swagger-ui', '_blank')}>
               <ApiIcon sx={{ mr: 2 }} /> API Documentation
diff --git a/frontend/src/pages/DocumentManagementPage.tsx b/frontend/src/pages/DocumentManagementPage.tsx
index 3dc4322..c528a16 100644
--- a/frontend/src/pages/DocumentManagementPage.tsx
+++ b/frontend/src/pages/DocumentManagementPage.tsx
@@ -582,12 +582,12 @@ const DocumentManagementPage: React.FC = () => {
     if (currentTab === 0) {
       fetchFailedDocuments();
     } else if (currentTab === 1) {
+      // Refresh both low confidence and failed documents for the merged cleanup tab
       handlePreviewLowConfidence();
+      handlePreviewFailedDocuments();
     } else if (currentTab === 2) {
       fetchDuplicates();
     } else if (currentTab === 3) {
-      handlePreviewFailedDocuments();
-    } else if (currentTab === 4) {
       fetchIgnoredFiles();
       fetchIgnoredFilesStats();
     }
@@ -750,10 +750,10 @@ const DocumentManagementPage: React.FC = () => {
               iconPosition="start"
             />
           </Tooltip>
-          <Tooltip title="Manage documents with low OCR confidence scores - preview and delete documents below a confidence threshold">
+          <Tooltip title="Manage and clean up documents with quality issues - low OCR confidence or failed processing">
             <Tab
-              icon={<FindInPageIcon />}
-              label={`Low Quality Manager${previewData ? ` (${previewData.matched_count})` : ''}`}
+              icon={<DeleteIcon />}
+              label={`Document Cleanup${(previewData?.matched_count || 0) + (failedPreviewData?.matched_count || 0) > 0 ? ` (${(previewData?.matched_count || 0) + (failedPreviewData?.matched_count || 0)})` : ''}`}
               iconPosition="start"
             />
           </Tooltip>
@@ -764,13 +764,6 @@ const DocumentManagementPage: React.FC = () => {
               iconPosition="start"
             />
           </Tooltip>
-          <Tooltip title="Bulk operations for document cleanup and maintenance">
-            <Tab
-              icon={<DeleteIcon />}
-              label="Bulk Cleanup"
-              iconPosition="start"
-            />
-          </Tooltip>
           <Tooltip title="Manage files that have been ignored during sync operations">
             <Tab
               icon={<BlockIcon />}
@@ -1373,17 +1366,28 @@ const DocumentManagementPage: React.FC = () => {
         </>
       )}
 
-      {/* Low Quality Manager Tab Content */}
+      {/* Document Cleanup Tab Content - Merged Low Quality Manager and Bulk Cleanup */}
       {currentTab === 1 && (
         <>
           <Alert severity="info" sx={{ mb: 3 }}>
-            <AlertTitle>Low Confidence Document Deletion</AlertTitle>
+            <AlertTitle>Document Cleanup Center</AlertTitle>
             <Typography>
-              This tool allows you to delete documents with OCR confidence below a specified threshold. 
-              Use the preview feature first to see what documents would be affected before deleting.
+              Clean up your document library by removing problematic documents. You can delete:
+            </Typography>
+            <Box component="ul" sx={{ mt: 1, mb: 0, pl: 2 }}>
+              <li>Documents with low OCR confidence scores (below a threshold you set)</li>
+              <li>Documents where OCR processing failed completely</li>
+            </Box>
+            <Typography sx={{ mt: 1 }}>
+              Always use the preview feature before deleting to see which documents will be affected.
             </Typography>
           </Alert>
 
+          {/* Low Confidence Documents Section */}
+          <Typography variant="h5" gutterBottom sx={{ mb: 2 }}>
+            Low Confidence Documents
+          </Typography>
+
           <Card sx={{ mb: 3 }}>
             <CardContent>
               <Grid container spacing={3} alignItems="center">
@@ -1504,18 +1508,20 @@ const DocumentManagementPage: React.FC = () => {
               <Typography sx={{ ml: 2 }}>Processing request...</Typography>
             </Box>
           )}
-        </>
-      )}
 
-      {/* Delete Failed Documents Tab Content */}
-      {currentTab === 3 && (
-        <>
+          {/* Divider between sections */}
+          <Divider sx={{ my: 4 }} />
+
+          {/* Failed Documents Section */}
+          <Typography variant="h5" gutterBottom sx={{ mt: 4, mb: 2 }}>
+            Failed OCR Documents
+          </Typography>
+
           <Alert severity="warning" sx={{ mb: 3 }}>
             <AlertTitle>Delete Failed OCR Documents</AlertTitle>
             <Typography>
-              This tool allows you to delete all documents where OCR processing failed completely. 
+              This section allows you to delete all documents where OCR processing failed completely. 
               This includes documents with NULL confidence values or explicit failure status.
-              Use the preview feature first to see what documents would be affected before deleting.
             </Typography>
           </Alert>
 
@@ -1549,7 +1555,7 @@ const DocumentManagementPage: React.FC = () => {
             </CardContent>
           </Card>
 
-          {/* Preview Results */}
+          {/* Preview Results for Failed Documents */}
           {failedPreviewData && (
             <Card sx={{ mb: 3 }}>
               <CardContent>
@@ -1574,7 +1580,7 @@ const DocumentManagementPage: React.FC = () => {
             </Card>
           )}
 
-          {/* Loading State */}
+          {/* Loading State for Failed Documents */}
           {failedDocsLoading && !failedPreviewData && (
             <Box display="flex" justifyContent="center" alignItems="center" minHeight="200px">
               <CircularProgress />
@@ -1585,7 +1591,7 @@ const DocumentManagementPage: React.FC = () => {
       )}
 
       {/* Ignored Files Tab Content */}
-      {currentTab === 4 && (
+      {currentTab === 3 && (
         <>
           <Alert severity="info" sx={{ mb: 3 }}>
             <AlertTitle>Ignored Files Management</AlertTitle>
diff --git a/src/routes/documents.rs b/src/routes/documents.rs
index cec3549..7cbb8bb 100644
--- a/src/routes/documents.rs
+++ b/src/routes/documents.rs
@@ -1992,6 +1992,20 @@ pub async fn delete_low_confidence_documents(
 }
 
 /// Delete all documents with failed OCR processing
+#[utoipa::path(
+    post,
+    path = "/api/documents/delete-failed-ocr",
+    tag = "documents",
+    security(
+        ("bearer_auth" = [])
+    ),
+    request_body = serde_json::Value,
+    responses(
+        (status = 200, description = "Failed OCR documents deleted successfully", body = serde_json::Value),
+        (status = 401, description = "Unauthorized"),
+        (status = 500, description = "Internal server error")
+    )
+)]
 pub async fn delete_failed_ocr_documents(
     State(state): State<Arc<AppState>>,
     auth_user: AuthUser,
diff --git a/src/swagger.rs b/src/swagger.rs
index 673a06a..85bb6fa 100644
--- a/src/swagger.rs
+++ b/src/swagger.rs
@@ -50,7 +50,11 @@ use crate::{
         crate::routes::documents::get_document_ocr,
         crate::routes::documents::get_processed_image,
         crate::routes::documents::retry_ocr,
+        crate::routes::documents::get_document_debug_info,
         crate::routes::documents::get_failed_ocr_documents,
+        crate::routes::documents::view_failed_document,
+        crate::routes::documents::delete_low_confidence_documents,
+        crate::routes::documents::delete_failed_ocr_documents,
         crate::routes::documents::get_user_duplicates,
         // Labels endpoints
         crate::routes::labels::get_labels,
@@ -79,6 +83,7 @@ use crate::{
         // Queue endpoints
         crate::routes::queue::get_queue_stats,
         crate::routes::queue::requeue_failed,
+        crate::routes::queue::enqueue_pending_documents,
         crate::routes::queue::get_ocr_status,
         crate::routes::queue::pause_ocr_processing,
         crate::routes::queue::resume_ocr_processing,