fix: OCR Kombi upload race condition — openSession was resetting step to 0

openSession mapped dbStep=1 to uiStep=0 (upload), overriding handleNext's
advancement to step 1. Fix: sessions always exist post-upload, so always
skip past the upload step in openSession.

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

admin-lehrer/app/(admin)/ai/ocr-kombi/page.tsx

@@ -57,7 +57,6 @@ function OcrKombiContent() {
               setSessionId(sid)
               loadSessions()
               openSession(sid)
-              handleNext()
             }}
           />
         )