feat: Feinabstimmung mit 7 Schiebereglern fuer Deskew/Dewarp

Neues aufklappbares Panel unter Entzerrung mit individuellen Reglern:
- 3 Rotations-Regler (P1 Iterative, P2 Word-Alignment, P3 Textline)
- 4 Scherungs-Regler (A-D Methoden) mit Radio-Auswahl
- Kombinierte Vorschau und Ground-Truth-Speicherung
- Backend: POST /sessions/{id}/adjust-combined Endpoint

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

admin-lehrer/components/ocr-pipeline/StepDewarp.tsx

@@ -1,7 +1,7 @@
 'use client'
 
 import { useCallback, useEffect, useState } from 'react'
-import type { DewarpResult, DewarpGroundTruth } from '@/app/(admin)/ai/ocr-pipeline/types'
+import type { DeskewResult, DewarpResult, DewarpGroundTruth } from '@/app/(admin)/ai/ocr-pipeline/types'
 import { DewarpControls } from './DewarpControls'
 import { ImageCompareView } from './ImageCompareView'
 
@@ -14,11 +14,31 @@ interface StepDewarpProps {
 
 export function StepDewarp({ sessionId, onNext }: StepDewarpProps) {
   const [dewarpResult, setDewarpResult] = useState<DewarpResult | null>(null)
+  const [deskewResult, setDeskewResult] = useState<DeskewResult | null>(null)
   const [dewarping, setDewarping] = useState(false)
   const [applying, setApplying] = useState(false)
   const [showGrid, setShowGrid] = useState(true)
   const [error, setError] = useState<string | null>(null)
 
+  // Load session info to get deskew_result (for fine-tuning init values)
+  useEffect(() => {
+    if (!sessionId) return
+    const loadSession = async () => {
+      try {
+        const res = await fetch(`${KLAUSUR_API}/api/v1/ocr-pipeline/sessions/${sessionId}`)
+        if (res.ok) {
+          const data = await res.json()
+          if (data.deskew_result) {
+            setDeskewResult(data.deskew_result)
+          }
+        }
+      } catch (e) {
+        console.error('Failed to load session info:', e)
+      }
+    }
+    loadSession()
+  }, [sessionId])
+
   // Auto-trigger dewarp when component mounts with a sessionId
   useEffect(() => {
     if (!sessionId || dewarpResult) return
@@ -78,6 +98,37 @@ export function StepDewarp({ sessionId, onNext }: StepDewarpProps) {
     }
   }, [sessionId])
 
+  const handleCombinedAdjust = useCallback(async (rotationDegrees: number, shearDegrees: number) => {
+    if (!sessionId) return
+    setApplying(true)
+    setError(null)
+
+    try {
+      const res = await fetch(`${KLAUSUR_API}/api/v1/ocr-pipeline/sessions/${sessionId}/adjust-combined`, {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({ rotation_degrees: rotationDegrees, shear_degrees: shearDegrees }),
+      })
+      if (!res.ok) throw new Error('Kombinierte Anpassung fehlgeschlagen')
+
+      const data = await res.json()
+      setDewarpResult((prev) =>
+        prev
+          ? {
+              ...prev,
+              method_used: data.method_used,
+              shear_degrees: data.shear_degrees,
+              dewarped_image_url: `${KLAUSUR_API}${data.dewarped_image_url}?t=${Date.now()}`,
+            }
+          : null,
+      )
+    } catch (e) {
+      setError(e instanceof Error ? e.message : 'Fehler')
+    } finally {
+      setApplying(false)
+    }
+  }, [sessionId])
+
   const handleGroundTruth = useCallback(async (gt: DewarpGroundTruth) => {
     if (!sessionId) return
     try {
@@ -133,9 +184,11 @@ export function StepDewarp({ sessionId, onNext }: StepDewarpProps) {
       {/* Controls */}
       <DewarpControls
         dewarpResult={dewarpResult}
+        deskewResult={deskewResult}
         showGrid={showGrid}
         onToggleGrid={() => setShowGrid((v) => !v)}
         onManualDewarp={handleManualDewarp}
+        onCombinedAdjust={handleCombinedAdjust}
         onGroundTruth={handleGroundTruth}
         onNext={onNext}
         isApplying={applying}