fix: Fix a type error in List JIT access API (#49612)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

* **Bug Fixes**
* Improved database access rule handling by excluding records without an
associated user.
* Preserved valid user-rule mappings while preventing incomplete entries
from being included.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

apps/studio/components/interfaces/Settings/Database/JitDatabaseAccess/JitDbAccess.utils.ts

@@ -257,7 +257,9 @@ export function mapJitMembersToUserRules(
   const memberMap = new Map((projectMembers ?? []).map((member) => [member.user_id, member]))
   const baseRoleIds = roleOptions.map((role) => role.id)
 
-  return (jitMembers ?? []).map((item) => {
+  return (jitMembers ?? []).flatMap((item) => {
+    if (!item.user_id) return []
+
     const mappedMember = memberMap.get(item.user_id)
     const assignedRoles: JitRoleGrantDraft[] = (item.user_roles ?? []).map((roleObj) => {
       const roleWithBranchRestriction = roleObj as typeof roleObj & { branches_only?: boolean }
@@ -294,14 +296,16 @@ export function mapJitMembersToUserRules(
     const email = mappedMember?.primary_email ?? item.user_id
     const name = mappedMember?.username ?? undefined
 
-    return {
-      id: item.user_id,
-      memberId: item.user_id,
-      email,
-      name,
-      grants: cloneGrants(grants),
-      status: computeStatusFromGrants(grants),
-    }
+    return [
+      {
+        id: item.user_id,
+        memberId: item.user_id,
+        email,
+        name,
+        grants: cloneGrants(grants),
+        status: computeStatusFromGrants(grants),
+      },
+    ]
   })
 }
 

packages/api-types/types/api-v1.d.ts

@@ -3348,28 +3348,52 @@ export interface components {
       }
     }
     JitListAccessResponse: {
-      items: {
-        expires_at: null
-        invite_id: null
-        primary_email: string | null
-        /** Format: uuid */
-        user_id: string
-        user_roles: {
-          allowed_networks?: {
-            allowed_cidrs?: {
-              /** Format: cidrv4 */
-              cidr: string
-            }[]
-            allowed_cidrs_v6?: {
-              /** Format: cidrv6 */
-              cidr: string
+      items: (
+        | {
+            expires_at: null
+            invite_id: null
+            primary_email: string | null
+            /** Format: uuid */
+            user_id: string
+            user_roles: {
+              allowed_networks?: {
+                allowed_cidrs?: {
+                  /** Format: cidrv4 */
+                  cidr: string
+                }[]
+                allowed_cidrs_v6?: {
+                  /** Format: cidrv6 */
+                  cidr: string
+                }[]
+              }
+              branches_only?: boolean
+              expires_at?: number
+              role: string
             }[]
           }
-          branches_only?: boolean
-          expires_at?: number
-          role: string
-        }[]
-      }[]
+        | {
+            expires_at: string
+            /** Format: uuid */
+            invite_id: string
+            primary_email: string
+            user_id: null
+            user_roles: {
+              allowed_networks?: {
+                allowed_cidrs?: {
+                  /** Format: cidrv4 */
+                  cidr: string
+                }[]
+                allowed_cidrs_v6?: {
+                  /** Format: cidrv6 */
+                  cidr: string
+                }[]
+              }
+              branches_only?: boolean
+              expires_at?: number
+              role: string
+            }[]
+          }
+      )[]
     }
     LegacyApiKeysResponse: {
       enabled: boolean