fix(database): restrict db delete to agent-owning org (system agents admin-only)

- UI: delete button gated by canDeleteDatabases prop threaded from each page
  (org page: only org-created agents; admin page: system agents)
- authz: org path requires agent.organizationId === active org; drop join-based
  attribution so a system agent merely linked to an org is admin-delete-only

app/(customer)/dashboard/(admin)/agents/[agentId]/page.tsx

@@ -81,7 +81,7 @@ export default async function RoutePage(
         </PageDescription>
       )}
       <PageContent className="flex flex-col w-full h-full justify-between gap-6">
-        <AgentContentPage agent={agent} edgeKey={edgeKey} />
+        <AgentContentPage agent={agent} edgeKey={edgeKey} canDeleteDatabases={true} />
       </PageContent>
     </Page>
   );

app/(customer)/dashboard/(organization)/settings/agents/[agentId]/page.tsx

@@ -94,7 +94,7 @@ export default async function RoutePage(
                 </PageDescription>
             )}
             <PageContent className="flex flex-col w-full h-full justify-between gap-6">
-                <AgentContentPage agent={agent} edgeKey={edgeKey}/>
+                <AgentContentPage agent={agent} edgeKey={edgeKey} canDeleteDatabases={!!agent.organizationId}/>
             </PageContent>
         </Page>
     );

src/features/agents/components/agent-content.tsx

@@ -23,9 +23,10 @@ import {HealthcheckLog} from "@/db/schema/15_healthcheck-log";
 type AgentContentPageProps = {
     edgeKey: string;
     agent: AgentWithDatabases
+    canDeleteDatabases?: boolean
 }
 
-export const AgentContentPage = ({edgeKey, agent: initialAgent}: AgentContentPageProps) => {
+export const AgentContentPage = ({edgeKey, agent: initialAgent, canDeleteDatabases = false}: AgentContentPageProps) => {
 
     const {data} = useQuery({
         queryKey: ["agent-data", initialAgent.id],
@@ -121,6 +122,7 @@ export const AgentContentPage = ({edgeKey, agent: initialAgent}: AgentContentPag
                             new Date(b.createdAt).getTime() - new Date(a.createdAt).getTime()
                         )}
                         cardItem={AgentDatabaseCard}
+                        canDeleteDatabases={canDeleteDatabases}
                     />
                 </div>
             )}

src/features/agents/components/agent-database-card.tsx

@@ -4,20 +4,24 @@ import {Database} from "@/db/schema/07_database";
 import { DatabaseCard } from "@/components/common/database-card";
 import { DatabaseDeleteButton } from "@/features/agents/components/database-delete-button";
 
-export type agentDatabaseCardProps = {
+export type AgentDatabaseCardProps = {
     data: Database;
+    canDeleteDatabases?: boolean;
 };
 
-export const AgentDatabaseCard = (props: agentDatabaseCardProps) => {
+export const AgentDatabaseCard = (props: AgentDatabaseCardProps) => {
-    const {data: database} = props;
+    const { data: database, canDeleteDatabases = false } = props;
 
     return (
         <DatabaseCard
             withDetails={false}
             data={database}
             deleteButton={
-                database.agentId ? (
+                canDeleteDatabases && database.agentId ? (
-                    <DatabaseDeleteButton databaseId={database.id} agentId={database.agentId}/>
+                    <DatabaseDeleteButton
+                        databaseId={database.id}
+                        agentId={database.agentId}
+                    />
                 ) : undefined
             }
         />

src/features/database/actions/database-delete.action.ts

@@ -35,11 +35,7 @@ async function assertCanDeleteDatabase(databaseId: string): Promise<void> {
     const database = await db.query.database.findFirst({
         where: eq(drizzleDb.schemas.database.id, databaseId),
         with: {
-            agent: {
+            agent: true,
-                with: {
-                    organizations: true,
-                },
-            },
         },
     });
 
@@ -64,10 +60,11 @@ async function assertCanDeleteDatabase(databaseId: string): Promise<void> {
         const canManage = activeMember
             ? computeOrganizationPermissions(activeMember).canManageAgents
             : false;
+        // Only the organization that CREATED the agent may delete its databases.
+        // A system agent merely attributed to an org via the join table is
+        // handled by the isAdmin branch above (agent.organizationId === null).
         const hasAccess =
-            !!organization &&
+            !!organization && agent.organizationId === organization.id;
-            (agent.organizationId === organization.id ||
-                agent.organizations.some((o) => o.organizationId === organization.id));
         authorized = canManage && hasAccess;
     }