diff --git a/backend/server/routers/channels/__init__.py b/backend/server/routers/channels/__init__.py
index 61ac59ef..fd05adb4 100644
--- a/backend/server/routers/channels/__init__.py
+++ b/backend/server/routers/channels/__init__.py
@@ -15,7 +15,7 @@ from datetime import datetime
 from enum import Enum
 from typing import Any, Literal
 
-from fastapi import APIRouter, Depends, Request
+from fastapi import APIRouter, Depends, Query, Request
 from yuxi.channels.contract.dtos.common import Operator, OperatorRole
 from yuxi.channels.contract.dtos.control import ControlResult
 from yuxi.channels.contract.errors import (
@@ -395,6 +395,37 @@ def parse_datetime(field: str, raw: str | None) -> datetime | None:
         ) from exc
 
 
+# ------------------------------------------------------------------
+# 统一分页参数预设
+#
+# channels 模块所有列表类接口共享以下分页档位，消除参数声明散乱、默认值
+# 不一、上限阈值随意等问题。各预设按业务语义分档：
+#
+# - DEFAULT_LIMIT   : 高频翻页场景（审核 / 搜索 / 目录 / 路由绑定）
+# - LARGE_LIMIT     : 列表查询场景（会话 / 配对 / 白名单 / 审计 / 消息历史）
+# - ANALYTICS_LIMIT : 分析 Top N 场景
+# - EXPORT_LIMIT    : 导出场景（参数名建议用 export_limit 以区分语义）
+# - SUGGESTION_LIMIT: 输入联想场景
+# - OFFSET          : 分页偏移（与 DEFAULT_LIMIT / LARGE_LIMIT 搭配）
+# - CURSOR          : 游标分页标记（与 DEFAULT_LIMIT 搭配，用于 directory 系列）
+#
+# 使用方式：在接口签名中以模块级 Query 对象作为默认值——
+#   async def list_xxx(limit: int = DEFAULT_LIMIT, offset: int = OFFSET, ...):
+# ------------------------------------------------------------------
+DEFAULT_LIMIT: int = Query(default=20, ge=1, le=100, description="分页大小（1-100，默认 20）")
+LARGE_LIMIT: int = Query(default=100, ge=1, le=1000, description="分页大小（1-1000，默认 100）")
+ANALYTICS_LIMIT: int = Query(default=100, ge=1, le=500, description="Top N 上限（1-500，默认 100）")
+EXPORT_LIMIT: int = Query(
+    default=10000,
+    ge=1,
+    le=100000,
+    description="导出条目上限（1-100000，默认 10000）",
+)
+SUGGESTION_LIMIT: int = Query(default=10, ge=1, le=20, description="建议数量（1-20，默认 10）")
+OFFSET: int = Query(default=0, ge=0, description="分页偏移（>=0，默认 0）")
+CURSOR: str | None = Query(default=None, description="游标分页标记")
+
+
 def sanitize_headers(headers: Any) -> dict[str, str]:
     """脱敏 HTTP headers，剔除敏感字段（§11.1.2 日志不得记录敏感字段）。
 
diff --git a/backend/server/routers/channels/account_router.py b/backend/server/routers/channels/account_router.py
index b66d07f6..2a86ee69 100644
--- a/backend/server/routers/channels/account_router.py
+++ b/backend/server/routers/channels/account_router.py
@@ -47,6 +47,8 @@ from yuxi.channels.contract.errors import ValidationError
 from yuxi.storage.postgres.models_business import User
 
 from server.routers.channels import (
+    LARGE_LIMIT,
+    OFFSET,
     build_operator,
     get_channel_use_cases,
     raiseOnControlFailure,
@@ -182,8 +184,8 @@ async def list_accounts(
         default=None,
         description="按渠道类型过滤",
     ),
-    limit: int = Query(default=1000, ge=1, le=1000, description="分页大小"),
-    offset: int = Query(default=0, ge=0, description="分页偏移"),
+    limit: int = LARGE_LIMIT,
+    offset: int = OFFSET,
     use_cases=Depends(get_channel_use_cases),
     current_user: User = Depends(get_admin_user),
 ) -> dict[str, Any]:
diff --git a/backend/server/routers/channels/allowlist_router.py b/backend/server/routers/channels/allowlist_router.py
index c58f0587..094d7002 100644
--- a/backend/server/routers/channels/allowlist_router.py
+++ b/backend/server/routers/channels/allowlist_router.py
@@ -50,6 +50,8 @@ from yuxi.channels.contract.errors import ValidationError
 from yuxi.storage.postgres.models_business import User
 
 from server.routers.channels import (
+    LARGE_LIMIT,
+    OFFSET,
     build_operator,
     get_channel_use_cases,
     parse_datetime,
@@ -198,8 +200,8 @@ async def list_whitelist(
     account_id: str,
     policy_type: str,
     request: Request,
-    limit: int = Query(default=100, ge=1, le=1000, description="分页大小（1-1000，默认 100）"),
-    offset: int = Query(default=0, ge=0, description="偏移量（>=0，默认 0）"),
+    limit: int = LARGE_LIMIT,
+    offset: int = OFFSET,
     keyword: str | None = Query(default=None, description="关键词（模糊匹配 peer_id / peer_name）"),
     use_cases=Depends(get_channel_use_cases),
     current_user: User = Depends(get_admin_user),
diff --git a/backend/server/routers/channels/analytics_router.py b/backend/server/routers/channels/analytics_router.py
index 6523a40f..993c80fc 100644
--- a/backend/server/routers/channels/analytics_router.py
+++ b/backend/server/routers/channels/analytics_router.py
@@ -28,6 +28,7 @@ from yuxi.channels.contract.dtos.channel import ChannelType
 from yuxi.storage.postgres.models_business import User
 
 from server.routers.channels import (
+    ANALYTICS_LIMIT,
     Granularity,
     build_operator,
     get_channel_use_cases,
@@ -214,7 +215,7 @@ async def analyze_peers(
     end_time: str = Query(..., description="结束时间（ISO 8601）"),
     channel_type: ChannelType | None = Query(default=None, description="渠道类型过滤"),
     account_id: str | None = Query(default=None, description="账户 ID 过滤"),
-    limit: int = Query(default=100, ge=1, le=500, description="Top N 上限（1-500）"),
+    limit: int = ANALYTICS_LIMIT,
     use_cases=Depends(get_channel_use_cases),
     current_user: User = Depends(get_admin_user),
 ) -> dict[str, Any]:
diff --git a/backend/server/routers/channels/audit_router.py b/backend/server/routers/channels/audit_router.py
index 9f7d6d43..01fd0f1b 100644
--- a/backend/server/routers/channels/audit_router.py
+++ b/backend/server/routers/channels/audit_router.py
@@ -61,6 +61,8 @@ from yuxi.channels.contract.dtos.channel import ChannelType
 from yuxi.storage.postgres.models_business import User
 
 from server.routers.channels import (
+    LARGE_LIMIT,
+    OFFSET,
     build_operator,
     get_channel_use_cases,
     parse_datetime,
@@ -103,8 +105,8 @@ async def query_audit_logs(
     start_time: str | None = Query(default=None, description="起始时间（ISO 8601）"),
     end_time: str | None = Query(default=None, description="结束时间（ISO 8601）"),
     trace_id: str | None = Query(default=None, description="按链路追踪 ID 过滤"),
-    limit: int = Query(default=100, ge=1, le=500, description="分页大小"),
-    offset: int = Query(default=0, ge=0, description="分页偏移"),
+    limit: int = LARGE_LIMIT,
+    offset: int = OFFSET,
     use_cases=Depends(get_channel_use_cases),
     current_user: User = Depends(get_admin_user),
 ) -> dict[str, Any]:
diff --git a/backend/server/routers/channels/capability_router.py b/backend/server/routers/channels/capability_router.py
index 2aab2e47..e1d1a812 100644
--- a/backend/server/routers/channels/capability_router.py
+++ b/backend/server/routers/channels/capability_router.py
@@ -47,6 +47,8 @@ async def list_capabilities(
 @capability_router.get("/capabilities/matrix", response_model=dict)
 async def list_capability_matrix(
     request: Request,
+    status: str | None = None,
+    capability: str | None = None,
     use_cases=Depends(get_channel_use_cases),
     current_user: User = Depends(get_admin_user),
 ) -> dict[str, Any]:
@@ -54,10 +56,16 @@ async def list_capability_matrix(
 
     返回每个插件的完整 ``ChannelCapabilityProfile``，包含静态能力声明、
     运行时可用性、插件元数据与配置 schema，供能力查询页渲染高密度矩阵。
+
+    查询参数（可选，供前端服务端筛选预留）：
+        status: 按运行时可用性状态过滤（available/unavailable/unknown/unsupported）。
+        capability: 按能力字段名过滤（如 streaming、supports_image_outbound）。
     """
     operator = build_operator(current_user, request)
     result = await use_cases.capability_query.listCapabilityMatrix(
         operator=operator,
+        status=status,
+        capability=capability,
     )
     raiseOnControlFailure(result)
     return {"success": True, "data": serialize_control_data(result.data)}
diff --git a/backend/server/routers/channels/config_router.py b/backend/server/routers/channels/config_router.py
index a0065d77..900ae309 100644
--- a/backend/server/routers/channels/config_router.py
+++ b/backend/server/routers/channels/config_router.py
@@ -241,6 +241,31 @@ async def batch_update_config(
     return {"success": True, "data": serialize_control_data(result.data)}
 
 
+@config_router.get("/config/values", response_model=dict)
+async def get_config_values(
+    request: Request,
+    keys: list[str] = Query(..., description="配置键列表"),
+    scope: ConfigScope = Query(default=ConfigScope.GLOBAL, description="配置作用域"),
+    target: str | None = Query(default=None, description="作用域目标（channel/account 时必填）"),
+    use_cases=Depends(get_channel_use_cases),
+    current_user: User = Depends(get_admin_user),
+) -> dict[str, Any]:
+    """批量查询配置值（CFG-READ-MANY）。对应控制面操作 config/get_many。
+
+    一次性查询多个配置键的当前值，返回顺序与请求 keys 一致，供管理后台
+    替代多次单 key 请求。
+    """
+    operator = build_operator(current_user, request)
+    result = await use_cases.config_management.getConfigValues(
+        keys=keys,
+        operator=operator,
+        scope=scope,
+        target=target,
+    )
+    raiseOnControlFailure(result)
+    return {"success": True, "data": serialize_control_data(result.data)}
+
+
 @config_router.get("/config/{key}", response_model=dict)
 async def get_config(
     key: str,
diff --git a/backend/server/routers/channels/content_review_router.py b/backend/server/routers/channels/content_review_router.py
index 562351d2..a8927f3f 100644
--- a/backend/server/routers/channels/content_review_router.py
+++ b/backend/server/routers/channels/content_review_router.py
@@ -78,7 +78,9 @@ from yuxi.channels.contract.errors import ValidationError
 from yuxi.storage.postgres.models_business import User
 
 from server.routers.channels import (
+    DEFAULT_LIMIT,
     Granularity,
+    OFFSET,
     build_operator,
     dataclass_to_dict,
     get_channel_use_cases,
@@ -170,8 +172,7 @@ def _parse_resource_type(raw: str) -> ContentReviewResourceType:
     except ValueError as exc:
         raise ValidationError(
             "resource_type",
-            f"unsupported resource_type: {raw} "
-            "(expected: message_text | message_attachment | user_profile)",
+            f"unsupported resource_type: {raw} (expected: message_text | message_attachment | user_profile)",
         ) from exc
 
 
@@ -244,8 +245,8 @@ async def list_review_history(
         default=None,
         description="结束时间过滤（ISO 8601，含）",
     ),
-    limit: int = Query(default=20, ge=1, le=100, description="每页数量（1-100）"),
-    offset: int = Query(default=0, ge=0, description="分页偏移量"),
+    limit: int = DEFAULT_LIMIT,
+    offset: int = OFFSET,
     use_cases=Depends(get_channel_use_cases),
     current_user: User = Depends(get_admin_user),
 ) -> dict[str, Any]:
diff --git a/backend/server/routers/channels/directory_router.py b/backend/server/routers/channels/directory_router.py
index e011f57f..b3f64cd8 100644
--- a/backend/server/routers/channels/directory_router.py
+++ b/backend/server/routers/channels/directory_router.py
@@ -51,6 +51,9 @@ from yuxi.channels.contract.dtos.directory import (
 from yuxi.storage.postgres.models_business import User
 
 from server.routers.channels import (
+    CURSOR,
+    DEFAULT_LIMIT,
+    SUGGESTION_LIMIT,
     build_operator,
     get_channel_use_cases,
     raiseOnControlFailure,
@@ -73,8 +76,8 @@ async def search_directory_users(
     account_id: str,
     request: Request,
     keyword: str | None = Query(default=None, description="搜索关键词"),
-    cursor: str | None = Query(default=None, description="游标分页标记"),
-    limit: int = Query(default=20, ge=1, le=100, description="分页大小"),
+    cursor: str | None = CURSOR,
+    limit: int = DEFAULT_LIMIT,
     use_cases=Depends(get_channel_use_cases),
     current_user: User = Depends(get_admin_user),
 ) -> dict[str, Any]:
@@ -105,7 +108,7 @@ async def search_directory_suggestions(
     account_id: str,
     request: Request,
     keyword: str = Query(..., min_length=1, description="搜索关键词"),
-    limit: int = Query(default=10, ge=1, le=20, description="建议数量"),
+    limit: int = SUGGESTION_LIMIT,
     use_cases=Depends(get_channel_use_cases),
     current_user: User = Depends(get_admin_user),
 ) -> dict[str, Any]:
@@ -137,8 +140,8 @@ async def search_directory_groups(
     account_id: str,
     request: Request,
     keyword: str | None = Query(default=None, description="搜索关键词"),
-    cursor: str | None = Query(default=None, description="游标分页标记"),
-    limit: int = Query(default=20, ge=1, le=100, description="分页大小"),
+    cursor: str | None = CURSOR,
+    limit: int = DEFAULT_LIMIT,
     use_cases=Depends(get_channel_use_cases),
     current_user: User = Depends(get_admin_user),
 ) -> dict[str, Any]:
@@ -356,8 +359,8 @@ async def get_directory_group_members(
     account_id: str,
     group_id: str,
     request: Request,
-    cursor: str | None = Query(default=None, description="游标分页标记"),
-    limit: int = Query(default=20, ge=1, le=100, description="分页大小"),
+    cursor: str | None = CURSOR,
+    limit: int = DEFAULT_LIMIT,
     use_cases=Depends(get_channel_use_cases),
     current_user: User = Depends(get_admin_user),
 ) -> dict[str, Any]:
diff --git a/backend/server/routers/channels/message_router.py b/backend/server/routers/channels/message_router.py
index d8814fd6..05821bdd 100644
--- a/backend/server/routers/channels/message_router.py
+++ b/backend/server/routers/channels/message_router.py
@@ -48,6 +48,9 @@ from yuxi.channels.contract.errors import ValidationError
 from yuxi.storage.postgres.models_business import User
 
 from server.routers.channels import (
+    DEFAULT_LIMIT,
+    LARGE_LIMIT,
+    OFFSET,
     build_operator,
     dataclass_to_dict,
     get_channel_use_cases,
@@ -158,8 +161,8 @@ async def list_admin_messages(
     message_id: str | None = Query(default=None, description="按消息业务 ID 模糊匹配"),
     channel_msg_id: str | None = Query(default=None, description="按渠道消息 ID 模糊匹配"),
     channel_session_id: str | None = Query(default=None, description="按渠道会话 ID 模糊匹配"),
-    limit: int = Query(default=50, ge=1, le=200, description="分页大小"),
-    offset: int = Query(default=0, ge=0, description="分页偏移"),
+    limit: int = LARGE_LIMIT,
+    offset: int = OFFSET,
     use_cases=Depends(get_channel_use_cases),
     current_user: User = Depends(get_admin_user),
 ) -> dict[str, Any]:
@@ -207,19 +210,20 @@ async def search_messages(
     ),
     channel_session_id: str | None = Query(default=None, description="按会话 ID 过滤"),
     peer_id: str | None = Query(default=None, description="按对端 ID 过滤"),
+    account_id: str | None = Query(default=None, description="按渠道账户业务 ID 模糊匹配"),
     message_id: str | None = Query(default=None, description="按消息业务 ID 模糊匹配"),
     channel_msg_id: str | None = Query(default=None, description="按渠道消息 ID 模糊匹配"),
     start_time: str | None = Query(default=None, description="起始时间（ISO 8601）"),
     end_time: str | None = Query(default=None, description="截止时间（ISO 8601）"),
-    limit: int = Query(default=20, ge=1, le=100, description="分页大小"),
-    offset: int = Query(default=0, ge=0, description="分页偏移"),
+    limit: int = DEFAULT_LIMIT,
+    offset: int = OFFSET,
     use_cases=Depends(get_channel_use_cases),
     current_user: User = Depends(get_admin_user),
 ) -> dict[str, Any]:
     """全文搜索消息（MSG-SEARCH-01）。
 
-    按关键词搜索消息内容，支持渠道、状态、角色、会话、对端 ID、消息 ID、
-    渠道消息 ID、时间范围过滤。对应控制面操作 ``message/search``。
+    按关键词搜索消息内容，支持渠道、状态、角色、会话、对端 ID、账户 ID、
+    消息 ID、渠道消息 ID、时间范围过滤。对应控制面操作 ``message/search``。
     """
     operator = build_operator(current_user, request)
     start_time_dt = parse_datetime("start_time", start_time)
@@ -234,6 +238,7 @@ async def search_messages(
         role=role,
         channel_session_id=channel_session_id,
         peer_id=peer_id,
+        account_id=account_id,
         message_id=message_id,
         channel_msg_id=channel_msg_id,
         start_time=start_time_dt,
diff --git a/backend/server/routers/channels/outbox_router.py b/backend/server/routers/channels/outbox_router.py
index bd5854c0..2ea45000 100644
--- a/backend/server/routers/channels/outbox_router.py
+++ b/backend/server/routers/channels/outbox_router.py
@@ -42,6 +42,9 @@ from yuxi.channels.contract.dtos.outbox import (
 from yuxi.storage.postgres.models_business import User
 
 from server.routers.channels import (
+    EXPORT_LIMIT,
+    LARGE_LIMIT,
+    OFFSET,
     build_operator,
     get_channel_use_cases,
     parse_datetime,
@@ -93,8 +96,8 @@ async def list_outbox_messages(
     retry_count_min: int | None = Query(
         default=None, ge=0, description="最小重试次数下界（含），用于筛选已发生重试的条目"
     ),
-    limit: int = Query(default=100, ge=1, le=200, description="分页大小"),
-    offset: int = Query(default=0, ge=0, description="分页偏移"),
+    limit: int = LARGE_LIMIT,
+    offset: int = OFFSET,
     use_cases=Depends(get_channel_use_cases),
     current_user: User = Depends(get_admin_user),
 ) -> dict[str, Any]:
@@ -190,8 +193,8 @@ async def list_dead_letter_outbox(
     retry_count_min: int | None = Query(
         default=None, ge=0, description="最小重试次数下界（含），用于筛选已发生重试的条目"
     ),
-    limit: int = Query(default=100, ge=1, le=200, description="分页大小"),
-    offset: int = Query(default=0, ge=0, description="分页偏移"),
+    limit: int = LARGE_LIMIT,
+    offset: int = OFFSET,
     use_cases=Depends(get_channel_use_cases),
     current_user: User = Depends(get_admin_user),
 ) -> dict[str, Any]:
@@ -295,7 +298,7 @@ async def export_dead_letter(
     created_after: str | None = Query(default=None, description="创建时间下界（ISO 8601）"),
     created_before: str | None = Query(default=None, description="创建时间上界（ISO 8601）"),
     export_format: Literal["json", "csv"] = Query(default="json", alias="format", description="导出格式（json / csv）"),
-    limit: int = Query(default=10000, ge=1, le=100000, description="导出条目上限，防止大规模死信队列 OOM"),
+    export_limit: int = EXPORT_LIMIT,
     use_cases=Depends(get_channel_use_cases),
     current_user: User = Depends(get_admin_user),
 ) -> dict[str, Any]:
@@ -303,8 +306,8 @@ async def export_dead_letter(
 
     按过滤条件查询 DEAD 状态 outbox 条目并序列化为 ``json`` / ``csv`` 格式。
     ``format=json`` 时 ``content`` 为记录数组；``format=csv`` 时 ``content``
-    为 CSV 字符串（含表头与 CSV injection 防护）。``limit`` 限制单次导出条目数
-    （默认 10000），防止大规模死信队列 OOM。
+    为 CSV 字符串（含表头与 CSV injection 防护）。``export_limit`` 限制单次导出
+    条目数（默认 10000），防止大规模死信队列 OOM。
     """
     operator = build_operator(current_user, request)
     created_after_dt = parse_datetime("created_after", created_after)
@@ -314,7 +317,7 @@ async def export_dead_letter(
         created_after=created_after_dt,
         created_before=created_before_dt,
         format=export_format,
-        limit=limit,
+        limit=export_limit,
     )
     result = await use_cases.outbox_management.exportDeadLetters(cmd, operator=operator)
     raiseOnControlFailure(result)
diff --git a/backend/server/routers/channels/pairing_router.py b/backend/server/routers/channels/pairing_router.py
index 4965f435..6e3c75d1 100644
--- a/backend/server/routers/channels/pairing_router.py
+++ b/backend/server/routers/channels/pairing_router.py
@@ -37,6 +37,8 @@ from yuxi.storage.postgres.models_business import User
 
 from server.routers.channels import (
     Granularity,
+    LARGE_LIMIT,
+    OFFSET,
     build_operator,
     get_channel_use_cases,
     parse_datetime,
@@ -117,8 +119,8 @@ async def list_pairings(
     status: PairingStatus | None = Query(default=None, description="按状态过滤"),
     created_after: str | None = Query(default=None, description="申请时间下界（ISO 8601，含，按 requested_at 过滤）"),
     created_before: str | None = Query(default=None, description="申请时间上界（ISO 8601，含，按 requested_at 过滤）"),
-    limit: int = Query(default=100, ge=1, le=1000, description="分页大小"),
-    offset: int = Query(default=0, ge=0, description="分页偏移"),
+    limit: int = LARGE_LIMIT,
+    offset: int = OFFSET,
     use_cases=Depends(get_channel_use_cases),
     current_user: User = Depends(get_admin_user),
 ) -> dict[str, Any]:
diff --git a/backend/server/routers/channels/plugin_router.py b/backend/server/routers/channels/plugin_router.py
index bf2867a1..9b07fd16 100644
--- a/backend/server/routers/channels/plugin_router.py
+++ b/backend/server/routers/channels/plugin_router.py
@@ -122,17 +122,23 @@ async def list_plugins(
 @plugin_router.get("/catalog", response_model=dict)
 async def list_plugin_catalog(
     request: Request,
+    state: PluginStateLiteral | None = Query(
+        default=None,
+        description="按生命周期状态过滤（discovered/resolved/loaded/initialized/started/paused/stopped/unloaded/failed/not_installed/installed）",
+    ),
     use_cases=Depends(get_channel_use_cases),
     current_user: User = Depends(get_admin_user),
 ) -> dict[str, Any]:
     """列出插件目录（PLG-CATALOG）。对应控制面操作 plugin/catalog。
 
-    返回所有已注册插件的卡片视图元数据（含 capabilities），供前端卡片
-    网格展示。与 ``GET /plugins`` 的区别在于返回 capabilities 字段。
+    返回已注册插件的卡片视图元数据（含 capabilities），供前端卡片网格展示。
+    与 ``GET /plugins`` 的区别在于返回 capabilities / icon / last_error 字段；
+    支持 ``state`` 查询参数与 ``GET /plugins`` 保持一致，便于前端直接做服务端状态过滤。
     """
     operator = build_operator(current_user, request)
     result = await use_cases.plugin_management.listPluginCatalog(
         operator=operator,
+        state=state,
     )
     raiseOnControlFailure(result)
     return {"success": True, "data": serialize_control_data(result.data)}
diff --git a/backend/server/routers/channels/route_binding_router.py b/backend/server/routers/channels/route_binding_router.py
index 0dbc525c..dd363480 100644
--- a/backend/server/routers/channels/route_binding_router.py
+++ b/backend/server/routers/channels/route_binding_router.py
@@ -39,6 +39,8 @@ from yuxi.channels.contract.errors import ValidationError
 from yuxi.storage.postgres.models_business import User
 
 from server.routers.channels import (
+    DEFAULT_LIMIT,
+    OFFSET,
     build_operator,
     get_channel_use_cases,
     raiseOnControlFailure,
@@ -148,8 +150,8 @@ async def list_route_bindings(
     match_source: str | None = Query(default=None, description="按匹配来源过滤"),
     enabled: bool | None = Query(default=None, description="按启用状态过滤"),
     agent_binding: str | None = Query(default=None, description="按绑定 Agent 过滤"),
-    limit: int = Query(default=20, ge=1, le=1000, description="分页大小"),
-    offset: int = Query(default=0, ge=0, description="分页偏移"),
+    limit: int = DEFAULT_LIMIT,
+    offset: int = OFFSET,
     use_cases=Depends(get_channel_use_cases),
     current_user: User = Depends(get_admin_user),
 ) -> dict[str, Any]:
diff --git a/backend/server/routers/channels/session_router.py b/backend/server/routers/channels/session_router.py
index b87133c9..19962db5 100644
--- a/backend/server/routers/channels/session_router.py
+++ b/backend/server/routers/channels/session_router.py
@@ -47,6 +47,8 @@ from yuxi.channels.infrastructure import DependencyInjectionContainer
 from yuxi.storage.postgres.models_business import User
 
 from server.routers.channels import (
+    LARGE_LIMIT,
+    OFFSET,
     build_operator,
     dataclass_to_dict,
     get_channel_di_container,
@@ -162,8 +164,8 @@ async def list_sessions(
     last_message_after: str | None = Query(default=None, description="最近消息时间下界（ISO 8601）"),
     last_message_before: str | None = Query(default=None, description="最近消息时间上界（ISO 8601）"),
     abnormal: bool = Query(default=False, description="仅返回异常会话（僵尸/账户不可用/无主）"),
-    limit: int = Query(default=100, ge=1, le=1000, description="分页大小"),
-    offset: int = Query(default=0, ge=0, description="分页偏移"),
+    limit: int = LARGE_LIMIT,
+    offset: int = OFFSET,
     use_cases=Depends(get_channel_use_cases),
     current_user: User = Depends(get_admin_user),
 ) -> dict[str, Any]:
@@ -404,8 +406,8 @@ async def close_session(
 async def list_session_messages(
     session_id: str,
     request: Request,
-    limit: int = Query(default=50, ge=1, le=200, description="分页大小"),
-    offset: int = Query(default=0, ge=0, description="分页偏移"),
+    limit: int = LARGE_LIMIT,
+    offset: int = OFFSET,
     use_cases=Depends(get_channel_use_cases),
     current_user: User = Depends(get_admin_user),
 ) -> dict[str, Any]: