refactor(backend): update services and register OCR router

- router.py: register ocr_router with OCR tag
- ontology.py: update ontology service logic
- orchestrator.py: update orchestrator service logic
- user_agent.py: update user agent schema and service
- schemas/user_agent.py: update user agent data schemas

server/src/app/services/user_agent.py

@@ -142,8 +142,11 @@ class UserAgentService:
             return self._build_implicit_expense_draft_guidance(payload)
 
         attachment_names = self._resolve_attachment_names(payload)
+        ocr_summary = str(payload.context_json.get("ocr_summary") or "").strip()
         attachment_hint = ""
-        if attachment_names:
+        if ocr_summary:
+            attachment_hint = f" 我已读取附件 OCR 摘要：{ocr_summary}"
+        elif attachment_names:
             attachment_hint = (
                 f" 我已带入 {len(attachment_names)} 份附件名称，但目前还不能直接读取附件内容，"
                 "仍需要你补充关键信息。"
@@ -238,6 +241,8 @@ class UserAgentService:
                 "request_context": payload.context_json.get("request_context"),
                 "attachment_count": payload.context_json.get("attachment_count"),
                 "attachment_names": self._resolve_attachment_names(payload),
+                "ocr_summary": payload.context_json.get("ocr_summary", ""),
+                "ocr_documents": payload.context_json.get("ocr_documents", []),
             },
             "tool_payload": payload.tool_payload,
             "citations": [item.model_dump(mode="json") for item in citations],
@@ -348,7 +353,11 @@ class UserAgentService:
     def _build_draft_payload(self, payload: UserAgentRequest) -> UserAgentDraftPayload:
         scenario_label = SCENARIO_LABELS.get(payload.ontology.scenario, "业务")
         subject = self._resolve_subject(payload)
+        claim_no = str(payload.tool_payload.get("claim_no") or "").strip() or None
+        claim_status = str(payload.tool_payload.get("status") or "").strip() or None
         title = f"{scenario_label}处理意见草稿"
+        if claim_no:
+            title = f"{scenario_label}草稿 {claim_no}"
         body = (
             f"主题：{subject}\n"
             "结论：已根据当前语义解析结果生成草稿，尚未自动执行。\n"
@@ -360,6 +369,9 @@ class UserAgentService:
             title=title,
             body=body,
             confirmation_required=True,
+            claim_id=str(payload.tool_payload.get("claim_id") or "").strip() or None,
+            claim_no=claim_no,
+            status=claim_status,
         )
 
     def _build_suggested_actions(