chore: backup before code cleanup

Backup commit before executing remove-unused-code proposal.
This includes all pending changes and new features.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

frontend/src/pages/ProcessingPage.tsx

@@ -14,10 +14,11 @@ import PreprocessingSettings from '@/components/PreprocessingSettings'
 import PreprocessingPreview from '@/components/PreprocessingPreview'
 import TableDetectionSelector from '@/components/TableDetectionSelector'
 import ProcessingTrackSelector from '@/components/ProcessingTrackSelector'
+import OCRPresetSelector from '@/components/OCRPresetSelector'
 import TaskNotFound from '@/components/TaskNotFound'
 import { useTaskValidation } from '@/hooks/useTaskValidation'
 import { useTaskStore, useProcessingState } from '@/store/taskStore'
-import type { LayoutModel, ProcessingOptions, PreprocessingMode, PreprocessingConfig, TableDetectionConfig, ProcessingTrack } from '@/types/apiV2'
+import type { LayoutModel, ProcessingOptions, PreprocessingMode, PreprocessingConfig, TableDetectionConfig, ProcessingTrack, OCRPreset, OCRConfig } from '@/types/apiV2'
 
 export default function ProcessingPage() {
   const { t } = useTranslation()
@@ -65,6 +66,10 @@ export default function ProcessingPage() {
   // Processing track override state (null = use system recommendation)
   const [forceTrack, setForceTrack] = useState<ProcessingTrack | null>(null)
 
+  // OCR Preset state (default to 'datasheet' for best balance)
+  const [ocrPreset, setOcrPreset] = useState<OCRPreset>('datasheet')
+  const [ocrConfig, setOcrConfig] = useState<OCRConfig>({})
+
   // Analyze document to determine if OCR is needed (only for pending tasks)
   const { data: documentAnalysis, isLoading: isAnalyzing } = useQuery({
     queryKey: ['documentAnalysis', taskId],
@@ -96,6 +101,8 @@ export default function ProcessingPage() {
         preprocessing_mode: preprocessingMode,
         preprocessing_config: preprocessingMode === 'manual' ? preprocessingConfig : undefined,
         table_detection: tableDetectionConfig,
+        ocr_preset: ocrPreset,
+        ocr_config: ocrPreset === 'custom' ? ocrConfig : undefined,
       }
 
       // Update TaskStore processing state
@@ -441,6 +448,15 @@ export default function ProcessingPage() {
           {/* OCR Track Options - Only show when document needs OCR */}
           {needsOcrTrack && !isAnalyzing && (
             <>
+              {/* OCR Processing Preset - Primary selection */}
+              <OCRPresetSelector
+                value={ocrPreset}
+                onChange={setOcrPreset}
+                customConfig={ocrConfig}
+                onCustomConfigChange={setOcrConfig}
+                disabled={processOCRMutation.isPending}
+              />
+
               {/* Layout Model Selection */}
               <LayoutModelSelector
                 value={layoutModel}