支持局域网 GPU OCR 服务，配置方式类似 Ollama。

backend/app/routers/admin.py

@@ -31,6 +31,7 @@ def settings_to_out(row: SystemSettings) -> SystemSettingsOut:
         openai_base_url=row.openai_base_url,
         openai_model=row.openai_model,
         openai_api_key_set=bool(row.openai_api_key),
+        ocr_service_url=row.ocr_service_url,
         updated_at=row.updated_at,
     )
 
@@ -74,6 +75,8 @@ def update_settings(
         row.openai_model = data.openai_model or None
     if data.openai_api_key is not None and data.openai_api_key.strip():
         row.openai_api_key = data.openai_api_key.strip()
+    if data.ocr_service_url is not None:
+        row.ocr_service_url = data.ocr_service_url.strip() or None
     row.updated_at = datetime.now(timezone.utc)
     db.commit()
     db.refresh(row)

backend/app/routers/wrong_questions.py

@@ -11,7 +11,7 @@ from sqlalchemy.orm import Session, joinedload
 from app.core.config import settings
 from app.core.database import SessionLocal, get_db
 from app.core.deps import get_current_user
-from app.models.user import Subject, User, WrongQuestion, WrongQuestionCategory, WrongQuestionStatus
+from app.models.user import Subject, SystemSettings, User, WrongQuestion, WrongQuestionCategory, WrongQuestionStatus
 from app.schemas import WrongQuestionCategoryEnum, WrongQuestionOut, WrongQuestionUpdate
 from app.services import annotation as annotation_service
 from app.services import llm as llm_service
@@ -50,6 +50,13 @@ def _expire_stale_processing(wq: WrongQuestion, db: Session) -> None:
     db.commit()
 
 
+def _ocr_service_url(db: Session) -> str | None:
+    row = db.get(SystemSettings, 1)
+    if row and row.ocr_service_url:
+        return row.ocr_service_url.strip() or None
+    return ocr_service.resolve_ocr_service_url()
+
+
 def _parse_mark_regions(raw: str | None) -> list[dict] | None:
     if not raw:
         return None
@@ -140,9 +147,12 @@ def _process_wrong_question(question_id: uuid.UUID):
 
         wq.error_message = None
         image_full = Path(settings.UPLOAD_DIR) / wq.image_path
+        ocr_url = _ocr_service_url(db)
         try:
             with ThreadPoolExecutor(max_workers=1) as pool:
-                future = pool.submit(ocr_service.run_ocr_with_regions, str(image_full))
+                future = pool.submit(
+                    ocr_service.run_ocr_with_regions, str(image_full), ocr_url
+                )
                 ocr_result = future.result(timeout=settings.OCR_TIMEOUT_SECONDS)
             ocr_text = ocr_result["text"]
             ocr_lines = ocr_result["lines"]
@@ -166,6 +176,8 @@ def _process_wrong_question(question_id: uuid.UUID):
             msg = _short_error(exc, "OCR 识别失败：")
             if "libGL" in str(exc):
                 msg += " 请在服务器执行: sudo bash deploy/install-ocr-deps.sh && systemctl restart grade-archive"
+            elif ocr_url:
+                msg += f" 请检查 OCR 服务是否可达: {ocr_url} （可浏览器访问 {ocr_url.rstrip('/')}/health）"
             wq.error_message = msg
             db.commit()
             return