diff --git a/api/app/controllers/app_log_controller.py b/api/app/controllers/app_log_controller.py
index ea7962c1..90fbd4ea 100644
--- a/api/app/controllers/app_log_controller.py
+++ b/api/app/controllers/app_log_controller.py
@@ -41,7 +41,7 @@ def list_app_logs(
 
     # 验证应用访问权限
     app_service = AppService(db)
-    app_service.get_app(app_id, workspace_id)
+    app = app_service.get_app(app_id, workspace_id)
 
     # 使用 Service 层查询
     log_service = AppLogService(db)
@@ -51,7 +51,8 @@ def list_app_logs(
         page=page,
         pagesize=pagesize,
         is_draft=is_draft,
-        keyword=keyword
+        keyword=keyword,
+        app_type=app.type,
     )
 
     items = [AppLogConversation.model_validate(c) for c in conversations]
diff --git a/api/app/core/workflow/executor.py b/api/app/core/workflow/executor.py
index 6ac48ede..ea05db87 100644
--- a/api/app/core/workflow/executor.py
+++ b/api/app/core/workflow/executor.py
@@ -16,6 +16,7 @@ from app.core.workflow.engine.runtime_schema import ExecutionContext
 from app.core.workflow.engine.state_manager import WorkflowStateManager
 from app.core.workflow.engine.stream_output_coordinator import StreamOutputCoordinator
 from app.core.workflow.engine.variable_pool import VariablePool, VariablePoolInitializer
+from app.core.workflow.nodes.base_node import NodeExecutionError
 
 logger = logging.getLogger(__name__)
 
@@ -326,10 +327,43 @@ class WorkflowExecutor:
 
             logger.error(f"Workflow execution failed: execution_id={self.execution_context.execution_id}, error={e}",
                          exc_info=True)
+
+            # 1) 尝试从 checkpoint 回补已成功节点的 node_outputs
+            recovered: dict[str, Any] = {}
+            try:
+                if self.graph is not None:
+                    recovered = self.graph.get_state(
+                        self.execution_context.checkpoint_config
+                    ).values or {}
+            except Exception as recover_err:
+                logger.warning(
+                    f"Recover state on failure failed: {recover_err}, "
+                    f"execution_id={self.execution_context.execution_id}"
+                )
+
             if result is None:
-                result = {"error": str(e)}
+                result = dict(recovered) if recovered else {}
             else:
-                result["error"] = str(e)
+                # 已有 result 与 recovered 合并，node_outputs 深度合并
+                for k, v in recovered.items():
+                    if k == "node_outputs" and isinstance(v, dict):
+                        existing = result.get("node_outputs") or {}
+                        result["node_outputs"] = {**v, **existing}
+                    else:
+                        result.setdefault(k, v)
+
+            # 2) 如果是节点抛出的 NodeExecutionError，把失败节点的 node_output 注入 node_outputs
+            failed_node_id: str | None = None
+            if isinstance(e, NodeExecutionError):
+                failed_node_id = e.node_id
+                node_outputs = result.setdefault("node_outputs", {})
+                # 不覆盖已有（理论上不会有），保底写入失败节点记录
+                node_outputs.setdefault(e.node_id, e.node_output)
+
+            result["error"] = str(e)
+            if failed_node_id:
+                result["error_node"] = failed_node_id
+
             yield {
                 "event": "workflow_end",
                 "data": self.result_builder.build_final_output(
diff --git a/api/app/core/workflow/nodes/base_node.py b/api/app/core/workflow/nodes/base_node.py
index 5458a80c..5d08670a 100644
--- a/api/app/core/workflow/nodes/base_node.py
+++ b/api/app/core/workflow/nodes/base_node.py
@@ -1,5 +1,6 @@
 import asyncio
 import logging
+import time
 import uuid
 from abc import ABC, abstractmethod
 from datetime import datetime
@@ -22,6 +23,20 @@ from app.services.multimodal_service import MultimodalService
 logger = logging.getLogger(__name__)
 
 
+class NodeExecutionError(Exception):
+    """节点执行失败异常。
+
+    携带失败节点的完整 node_output，供 executor 兜底注入 node_outputs，
+    保证 workflow_executions.output_data 里能看到失败节点的日志记录。
+    """
+
+    def __init__(self, node_id: str, node_output: dict[str, Any], error_message: str):
+        super().__init__(f"Node {node_id} execution failed: {error_message}")
+        self.node_id = node_id
+        self.node_output = node_output
+        self.error_message = error_message
+
+
 class BaseNode(ABC):
     """Base class for workflow nodes.
 
@@ -396,6 +411,8 @@ class BaseNode(ABC):
             "elapsed_time": elapsed_time,
             "token_usage": token_usage,
             "error": None,
+            # 单调递增序号，用于日志按执行顺序排序（JSONB 不保证 key 顺序）
+            "execution_order": time.monotonic_ns(),
             **self._extract_extra_fields(business_result),
         }
         final_output = {
@@ -444,7 +461,9 @@ class BaseNode(ABC):
             "output": None,
             "elapsed_time": elapsed_time,
             "token_usage": None,
-            "error": error_message
+            "error": error_message,
+            # 单调递增序号，用于日志按执行顺序排序
+            "execution_order": time.monotonic_ns(),
         }
 
         # if error_edge:
@@ -466,7 +485,12 @@ class BaseNode(ABC):
             **node_output
         })
         logger.error(f"Node {self.node_id} execution failed, stopping workflow: {error_message}")
-        raise Exception(f"Node {self.node_id} execution failed: {error_message}")
+        # 抛出自定义异常，把 node_output 带给 executor，供其写入 node_outputs
+        raise NodeExecutionError(
+            node_id=self.node_id,
+            node_output=node_output,
+            error_message=error_message,
+        )
 
     def _extract_input(self, state: WorkflowState, variable_pool: VariablePool) -> dict[str, Any]:
         """Extracts the input data for this node (used for logging or audit).
diff --git a/api/app/core/workflow/nodes/cycle_graph/iteration.py b/api/app/core/workflow/nodes/cycle_graph/iteration.py
index 3ee7774f..3ce22ab2 100644
--- a/api/app/core/workflow/nodes/cycle_graph/iteration.py
+++ b/api/app/core/workflow/nodes/cycle_graph/iteration.py
@@ -174,6 +174,9 @@ class IterationRuntime:
                             continue
                         node_type = result.get("node_outputs", {}).get(node_name, {}).get("node_type")
                         cycle_variable = {"item": item} if node_type == NodeType.CYCLE_START else None
+                        node_cfg = next(
+                            (n for n in self.cycle_nodes if n.get("id") == node_name), None
+                        )
                         self.event_write({
                             "type": "cycle_item",
                             "data": {
diff --git a/api/app/core/workflow/nodes/http_request/node.py b/api/app/core/workflow/nodes/http_request/node.py
index da13ceec..6b117368 100644
--- a/api/app/core/workflow/nodes/http_request/node.py
+++ b/api/app/core/workflow/nodes/http_request/node.py
@@ -255,9 +255,18 @@ class HttpRequestNode(BaseNode):
             case HttpContentType.NONE:
                 return {}
             case HttpContentType.JSON:
-                content["json"] = json.loads(self._render_template(
+                rendered = self._render_template(
                     self.typed_config.body.data, variable_pool
-                ))
+                )
+                if not rendered or not rendered.strip():
+                    # 第三方导入的工作流可能出现 content_type=json 但 data 为空的情况，视为无 body
+                    return {}
+                try:
+                    content["json"] = json.loads(rendered)
+                except json.JSONDecodeError as e:
+                    raise RuntimeError(
+                        f"Invalid JSON body for HTTP request node: {e.msg} (data={rendered!r})"
+                    )
             case HttpContentType.FROM_DATA:
                 data = {}
                 files = []
diff --git a/api/app/repositories/conversation_repository.py b/api/app/repositories/conversation_repository.py
index 129e1f02..e3447dbd 100644
--- a/api/app/repositories/conversation_repository.py
+++ b/api/app/repositories/conversation_repository.py
@@ -1,13 +1,15 @@
 import uuid
 from typing import Optional
 
-from sqlalchemy import select, desc, func
+from sqlalchemy import select, desc, func, or_, cast, Text
 from sqlalchemy.orm import Session
 
 from app.core.exceptions import ResourceNotFoundException
 from app.core.logging_config import get_db_logger
 from app.models import Conversation, Message
+from app.models.app_model import AppType
 from app.models.conversation_model import ConversationDetail
+from app.models.workflow_model import WorkflowExecution
 
 logger = get_db_logger()
 
@@ -206,7 +208,8 @@ class ConversationRepository:
             is_draft: Optional[bool] = None,
             keyword: Optional[str] = None,
             page: int = 1,
-            pagesize: int = 20
+            pagesize: int = 20,
+            app_type: Optional[str] = None,
     ) -> tuple[list[Conversation], int]:
         """
         查询应用日志会话列表（带分页和过滤）
@@ -218,6 +221,9 @@ class ConversationRepository:
             keyword: 搜索关键词（匹配消息内容）
             page: 页码（从 1 开始）
             pagesize: 每页数量
+            app_type: 应用类型。WORKFLOW 类型改用 workflow_executions 的
+                input_data/output_data 做关键词过滤（因为失败的工作流不会写入 messages 表）；
+                其他类型仍走 messages 表。
 
         Returns:
             Tuple[List[Conversation], int]: (会话列表，总数)
@@ -234,12 +240,28 @@ class ConversationRepository:
 
         # 如果有关键词搜索，通过子查询过滤包含该关键词的 conversation
         if keyword:
-            # 查找包含关键词的 conversation_id 列表
-            keyword_stmt = (
-                select(Message.conversation_id)
-                .where(Message.content.ilike(f"%{keyword}%"))
-                .distinct()
-            )
+            kw_pattern = f"%{keyword}%"
+            if app_type == AppType.WORKFLOW:
+                # 工作流：从 workflow_executions 的 input_data / output_data 匹配
+                # （messages 表只存开场白 assistant 消息，失败的工作流也不会写入）
+                keyword_stmt = (
+                    select(WorkflowExecution.conversation_id)
+                    .where(
+                        WorkflowExecution.conversation_id.is_not(None),
+                        or_(
+                            cast(WorkflowExecution.input_data, Text).ilike(kw_pattern),
+                            cast(WorkflowExecution.output_data, Text).ilike(kw_pattern),
+                        ),
+                    )
+                    .distinct()
+                )
+            else:
+                # Agent 等其他类型：仍走 messages 表（user + assistant 内容)
+                keyword_stmt = (
+                    select(Message.conversation_id)
+                    .where(Message.content.ilike(kw_pattern))
+                    .distinct()
+                )
             base_stmt = base_stmt.where(Conversation.id.in_(keyword_stmt))
 
         # Calculate total number of records
diff --git a/api/app/services/app_log_service.py b/api/app/services/app_log_service.py
index 7ca05d42..c2cff2a6 100644
--- a/api/app/services/app_log_service.py
+++ b/api/app/services/app_log_service.py
@@ -32,6 +32,7 @@ class AppLogService:
         pagesize: int = 20,
         is_draft: Optional[bool] = None,
         keyword: Optional[str] = None,
+        app_type: Optional[str] = None,
     ) -> Tuple[list[Conversation], int]:
         """
         查询应用日志会话列表
@@ -43,6 +44,7 @@ class AppLogService:
             pagesize: 每页数量
             is_draft: 是否草稿会话（None表示返回全部）
             keyword: 搜索关键词（匹配消息内容）
+            app_type: 应用类型（WORKFLOW 时关键词将从 workflow_executions 搜索）
 
         Returns:
             Tuple[list[Conversation], int]: (会话列表，总数)
@@ -55,7 +57,8 @@ class AppLogService:
                 "page": page,
                 "pagesize": pagesize,
                 "is_draft": is_draft,
-                "keyword": keyword
+                "keyword": keyword,
+                "app_type": app_type,
             }
         )
 
@@ -66,7 +69,8 @@ class AppLogService:
             is_draft=is_draft,
             keyword=keyword,
             page=page,
-            pagesize=pagesize
+            pagesize=pagesize,
+            app_type=app_type,
         )
 
         logger.info(
@@ -368,8 +372,16 @@ def _build_nodes_from_output_data(output_data: Optional[dict]) -> list[AppLogNod
     if not output_data:
         return []
     node_outputs: dict = output_data.get("node_outputs") or {}
+    # 按 execution_order（节点执行时写入的单调递增序号）排序。
+    # PostgreSQL JSONB 不保证 key 顺序，不能依赖 dict 插入顺序；
+    # 缺失 execution_order 的历史数据退化到 0，保持在最前。
+    ordered_items = sorted(
+        node_outputs.items(),
+        key=lambda kv: (kv[1] or {}).get("execution_order", 0)
+        if isinstance(kv[1], dict) else 0
+    )
     result = []
-    for node_id, node_data in node_outputs.items():
+    for node_id, node_data in ordered_items:
         if not isinstance(node_data, dict):
             continue
         output = dict(node_data)
@@ -382,6 +394,8 @@ def _build_nodes_from_output_data(output_data: Optional[dict]) -> list[AppLogNod
         inp = output.pop("input", None)
         elapsed_time = output.pop("elapsed_time", None)
         token_usage = output.pop("token_usage", None)
+        # execution_order 仅用于排序，不返回给前端
+        output.pop("execution_order", None)
         result.append(AppLogNodeExecution(
             node_id=node_id,
             node_type=node_type,