fix(webapp): keep the close action available for idle sessions

Address review on the sessions status change:
- Keep the "Close session" action on the detail page for Idle sessions; they
  are open, only Closed and Expired are terminal.
- Rename the status helper input from currentRunId to hasCurrentRun, since the
  detail page passes a run friendlyId, not the session's currentRunId.
- Restore the Active tooltip copy so it stays accurate now that the Active
  filter also returns open, idle sessions.
- Align the sessions docs example so the listed tag matches a top-level tag
  set at start time.

apps/webapp/app/components/sessions/v1/SessionStatus.tsx

@@ -13,7 +13,7 @@ export const allSessionStatuses = ["ACTIVE", "CLOSED", "EXPIRED"] as const satis
 >;
 
 const descriptions: Record<SessionDisplayStatus, string> = {
-  ACTIVE: "The session has a run currently executing.",
+  ACTIVE: "The session is open and can receive input or schedule new runs.",
   IDLE: "The session is open but has no run currently executing.",
   CLOSED: "The session was closed; no further input or runs can be triggered against it.",
   EXPIRED: "The session passed its expiry time without being closed explicitly.",

apps/webapp/app/presenters/v3/SessionListPresenter.server.ts

@@ -214,7 +214,7 @@ export class SessionListPresenter {
         const status = deriveSessionStatus({
           closedAt: session.closedAt,
           expiresAt: session.expiresAt,
-          currentRunId: session.currentRunId,
+          hasCurrentRun: session.currentRunId != null,
           currentRunStatus: currentRun?.status,
           now,
         });

apps/webapp/app/presenters/v3/deriveSessionStatus.test.ts

@@ -11,7 +11,7 @@ describe("deriveSessionStatus", () => {
       deriveSessionStatus({
         closedAt: PAST,
         expiresAt: null,
-        currentRunId: "run_1",
+        hasCurrentRun: true,
         currentRunStatus: "EXECUTING",
         now: NOW,
       })
@@ -23,7 +23,7 @@ describe("deriveSessionStatus", () => {
       deriveSessionStatus({
         closedAt: PAST,
         expiresAt: PAST,
-        currentRunId: null,
+        hasCurrentRun: false,
         currentRunStatus: undefined,
         now: NOW,
       })
@@ -35,7 +35,7 @@ describe("deriveSessionStatus", () => {
       deriveSessionStatus({
         closedAt: null,
         expiresAt: PAST,
-        currentRunId: "run_1",
+        hasCurrentRun: true,
         currentRunStatus: "EXECUTING",
         now: NOW,
       })
@@ -47,7 +47,7 @@ describe("deriveSessionStatus", () => {
       deriveSessionStatus({
         closedAt: null,
         expiresAt: FUTURE,
-        currentRunId: "run_1",
+        hasCurrentRun: true,
         currentRunStatus: "EXECUTING",
         now: NOW,
       })
@@ -59,7 +59,7 @@ describe("deriveSessionStatus", () => {
       deriveSessionStatus({
         closedAt: null,
         expiresAt: null,
-        currentRunId: "run_1",
+        hasCurrentRun: true,
         currentRunStatus: "EXPIRED",
         now: NOW,
       })
@@ -71,7 +71,7 @@ describe("deriveSessionStatus", () => {
       deriveSessionStatus({
         closedAt: null,
         expiresAt: null,
-        currentRunId: null,
+        hasCurrentRun: false,
         currentRunStatus: undefined,
         now: NOW,
       })
@@ -83,7 +83,7 @@ describe("deriveSessionStatus", () => {
       deriveSessionStatus({
         closedAt: null,
         expiresAt: null,
-        currentRunId: "run_missing",
+        hasCurrentRun: true,
         currentRunStatus: undefined,
         now: NOW,
       })

apps/webapp/app/presenters/v3/deriveSessionStatus.ts

@@ -7,11 +7,11 @@ export type DeriveSessionStatusInput = {
   closedAt: Date | null;
   /** `Session.expiresAt` — retention deadline, if any. */
   expiresAt: Date | null;
-  /** `Session.currentRunId` — pointer to the current run (no FK). */
-  currentRunId: string | null;
+  /** Whether the session points at a current run at all. */
+  hasCurrentRun: boolean;
   /**
-   * Status of the run named by `currentRunId`. `undefined` when there is no
-   * current run, or the pointer couldn't be resolved (stale / cross-env).
+   * Status of the current run. `undefined` when there is no current run, or the
+   * pointer couldn't be resolved (stale / cross-env).
    */
   currentRunStatus: TaskRunStatus | undefined;
   /** `Date.now()` at the time of derivation. */
@@ -38,7 +38,7 @@ export function deriveSessionStatus(input: DeriveSessionStatusInput): SessionDis
   }
 
   const hasLiveRun =
-    input.currentRunId != null &&
+    input.hasCurrentRun &&
     input.currentRunStatus !== undefined &&
     !isFinalRunStatus(input.currentRunStatus);
 

apps/webapp/app/routes/_app.orgs.$organizationSlug.projects.$projectParam.env.$envParam.sessions.$sessionParam/route.tsx

@@ -119,7 +119,7 @@ export default function Page() {
   const status = deriveSessionStatus({
     closedAt: session.closedAt ? new Date(session.closedAt) : null,
     expiresAt: session.expiresAt ? new Date(session.expiresAt) : null,
-    currentRunId: session.currentRun?.friendlyId ?? null,
+    hasCurrentRun: session.currentRun != null,
     currentRunStatus: session.currentRun?.status,
     now: Date.now(),
   });
@@ -791,7 +791,7 @@ function OverviewTab({
               <SessionStatusCombo status={status} />
             </Property.Value>
           </Property.Item>
-          {status === "ACTIVE" && (
+          {(status === "ACTIVE" || status === "IDLE") && (
             <Dialog key={`close-${session.friendlyId}`}>
               <DialogTrigger asChild>
                 <Button variant="danger/small">Close session…</Button>

docs/ai-chat/sessions.mdx

@@ -99,7 +99,10 @@ const { id, runId, publicAccessToken, isCached } = await sessions.start({
   type: "chat.agent",
   externalId: chatId,
   taskIdentifier: "my-chat",
+  // Top-level tags live on the Session row and are what `sessions.list({ tag })` filters on.
+  tags: [`chat:${chatId}`],
   triggerConfig: {
+    // triggerConfig.tags tag each run the session schedules, not the session row.
     tags: [`chat:${chatId}`],
     basePayload: { /* whatever your task's payload shape is */ },
   },
@@ -153,7 +156,7 @@ Cursor-paginated list of Sessions in the current environment. Returns a `CursorP
 ```ts
 for await (const s of sessions.list({
   type: "chat.agent",
-  tag: `user:${userId}`,
+  tag: `chat:${chatId}`,
   status: "ACTIVE",
   limit: 50,
 })) {