diff --git a/hub/filelib-web/src/lib/GrantsPanel.svelte b/hub/filelib-web/src/lib/GrantsPanel.svelte
index 24fa650..80c7c7b 100644
--- a/hub/filelib-web/src/lib/GrantsPanel.svelte
+++ b/hub/filelib-web/src/lib/GrantsPanel.svelte
@@ -60,6 +60,7 @@
       (g) =>
         g.principalId.toLowerCase().includes(q) ||
         (g.principalName ?? "").toLowerCase().includes(q) ||
+        (g.principalOpenId ?? "").toLowerCase().includes(q) ||
         (g.principalType === "USER" ? "个人" : "group").includes(q),
     );
   });
@@ -241,12 +242,12 @@
   {:else}
     <table class="list">
       <thead>
-        <tr><th>成员</th><th>类型</th><th>权限</th><th>加入时间</th><th></th></tr>
+        <tr><th>成员</th><th>userId</th><th>飞书 ID</th><th>类型</th><th>权限</th><th>加入时间</th><th></th></tr>
       </thead>
       <tbody>
         {#if shown.length === 0}
           <tr>
-            <td colspan="5" class="quiet !py-[18px] text-center">
+            <td colspan="7" class="quiet !py-[18px] text-center">
               {searchText.trim() === "" ? "暂无授权" : `无匹配「${searchText.trim()}」的授权`}
             </td>
           </tr>
@@ -256,15 +257,14 @@
               <td>
                 <a class="inline-flex items-center gap-2 text-ink hover:text-accent" href={principalHref(g)}>
                   <Avatar displayName={g.principalName} userId={g.principalId} size={26} />
-                  <span>
-                    <span class="flex items-center gap-1.5 text-[13px]">
-                      {g.principalName ?? g.principalId}
-                      {#if g.isCreatorGrant}<span class="quiet">(创建者)</span>{/if}
-                    </span>
-                    <span class="block font-mono text-[11px] text-ink-3">{g.principalId}</span>
+                  <span class="flex items-center gap-1.5 text-[13px]">
+                    {g.principalName ?? g.principalId}
+                    {#if g.isCreatorGrant}<span class="quiet">(创建者)</span>{/if}
                   </span>
                 </a>
               </td>
+              <td class="file-meta font-mono">{g.principalType === "USER" ? g.principalId : "—"}</td>
+              <td class="file-meta font-mono">{g.principalOpenId ?? "—"}</td>
               <td><span class="tag">{g.principalType === "USER" ? "个人" : "Group"}</span></td>
               <td>
                 <!-- 创建者授权不可动(契约 8.1);非 MANAGE 持有者只读。 -->
diff --git a/hub/filelib-web/src/lib/types.ts b/hub/filelib-web/src/lib/types.ts
index 3a92fdc..b46e774 100644
--- a/hub/filelib-web/src/lib/types.ts
+++ b/hub/filelib-web/src/lib/types.ts
@@ -107,6 +107,8 @@ export interface Grant {
   readonly principalId: string;
   /** 主体显示名(用户 displayName / 组 name);主体已删为 null,展示回落 principalId。 */
   readonly principalName: string | null;
+  /** USER 主体的飞书 openId;GROUP 或主体已删为 null。 */
+  readonly principalOpenId: string | null;
   readonly role: Role;
   /** 创建者授权不可收回、不可改(契约 8.1)。 */
   readonly isCreatorGrant: boolean;
diff --git a/hub/src/database/filelib/grantService.ts b/hub/src/database/filelib/grantService.ts
index e52ea09..f7be820 100644
--- a/hub/src/database/filelib/grantService.ts
+++ b/hub/src/database/filelib/grantService.ts
@@ -27,6 +27,8 @@ export interface GrantDto {
   readonly principalId: string;
   /** 主体显示名(用户 displayName / 组 name);主体已删时为 null,前端回落 principalId。 */
   readonly principalName: string | null;
+  /** USER 主体的飞书 openId;GROUP 或主体已删时为 null。 */
+  readonly principalOpenId: string | null;
   readonly role: FileLibRole;
   readonly isCreatorGrant: boolean;
   readonly createdAt: Date;
@@ -38,13 +40,14 @@ function toDto(grant: FileLibGrant): GrantDto {
     principalType: grant.principalType,
     principalId: grant.principalId,
     principalName: null,
+    principalOpenId: null,
     role: grant.role,
     isCreatorGrant: grant.isCreatorGrant,
     createdAt: grant.createdAt,
   };
 }
 
-/** 批量回填主体显示名(两次查询,不做 per-row 往返)。可在事务内调用。 */
+/** 批量回填主体显示名与飞书 openId(两次查询,不做 per-row 往返)。可在事务内调用。 */
 async function withPrincipalNames(
   prisma: Pick<PrismaClient, "user" | "memberGroup">,
   grants: readonly GrantDto[],
@@ -53,7 +56,10 @@ async function withPrincipalNames(
   const groupIds = [...new Set(grants.filter((g) => g.principalType === "GROUP").map((g) => g.principalId))];
   const users = userIds.length === 0
     ? []
-    : await prisma.user.findMany({ where: { id: { in: userIds } }, select: { id: true, displayName: true } });
+    : await prisma.user.findMany({
+        where: { id: { in: userIds } },
+        select: { id: true, displayName: true, feishuOpenId: true },
+      });
   const groups = groupIds.length === 0
     ? []
     : await prisma.memberGroup.findMany({ where: { id: { in: groupIds } }, select: { id: true, name: true } });
@@ -61,7 +67,12 @@ async function withPrincipalNames(
     ...users.map((u) => [u.id, u.displayName] as const),
     ...groups.map((g) => [g.id, g.name] as const),
   ]);
-  return grants.map((g) => ({ ...g, principalName: nameById.get(g.principalId) ?? null }));
+  const openIdById = new Map<string, string>(users.map((u) => [u.id, u.feishuOpenId] as const));
+  return grants.map((g) => ({
+    ...g,
+    principalName: nameById.get(g.principalId) ?? null,
+    principalOpenId: g.principalType === "USER" ? openIdById.get(g.principalId) ?? null : null,
+  }));
 }
 
 type Tx = Prisma.TransactionClient;