chore(agents): rename the "Applications" tab to "Fleet"

The second Agents tab was labelled "Applications" — a vague word that
didn't convey what these are and clashed with "Agent Builder", which is
mentioned in the header and is itself one of the listed agents. "Fleet"
is already the word the app uses for the collection of running agents
("In-flight agent sessions across the fleet"), so this reuses existing
vocabulary and parallels the sibling "Scouts" tab tonally.

Purely a display-label change:
- The visible tab label in AgentsTabLayout
- The "← Applications" back-link on detail and fleet-approvals pages
- Stale JSDoc / inline comments that referred to "the Applications tab"

Internal names — the /code/agents/applications route, the
agent-applications feature directory, the AgentsTab "applications" enum
value, the AGENT_PLATFORM_FLAG, hook names, and query keys — are all
untouched. No behavior changes, no data-model changes.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: dmarticus

packages/ui/src/features/agent-applications/components/AgentAnalyticsView.tsx

@@ -43,7 +43,7 @@ const tileTitle = (label: string): ReactNode => (
  * HogQL and shapes the data; this renders one of loading / error / empty /
  * populated.
  *
- * `scope` "overview" is the fleet board blended into the Applications landing
+ * `scope` "overview" is the fleet board blended into the Fleet landing
  * (KPIs + spend-by-agent + cost-by-model; the agent list below carries the
  * per-agent breakdown). "agent" is the per-agent Observability tab (KPIs +
  * cost-by-model + tool reliability — spend-by-agent is meaningless for one).

packages/ui/src/features/agent-applications/components/AgentApplicationsListView.tsx

@@ -32,7 +32,7 @@ type StatusFilter = "all" | "live" | "drafts";
 const PAGE_SIZE = 8;
 
 /**
- * The Applications tab. Renders the deployed-agent fleet as the primary
+ * The Fleet tab. Renders the deployed-agent fleet as the primary
  * surface: a searchable, status-filtered, paged list with the 7-day activity
  * strip pinned at the top and operational / live-now panels below.
  */

packages/ui/src/features/agent-applications/components/AgentDetailLayout.tsx

@@ -148,7 +148,7 @@ export function AgentDetailLayout({
           className="flex w-fit items-center gap-1.5 text-[12px] text-gray-11 no-underline hover:text-gray-12"
         >
           <ArrowLeftIcon size={13} />
-          Applications
+          Fleet
         </Link>
         <Flex align="center" gap="2" wrap="wrap" className="pr-44">
           <Text className="font-bold text-[22px] text-gray-12 leading-tight tracking-tight">

packages/ui/src/features/agent-applications/components/AgentFleetApprovalsPane.tsx

@@ -24,7 +24,7 @@ import { RefreshIndicator } from "./RefreshIndicator";
  * (joined client-side with `useAgentApplications`) and the detail pane reuses
  * `AgentApprovalDetail` once we resolve the application's `idOrSlug`. Owns its
  * own chrome (back link + title) rather than nesting under the Scouts /
- * Applications tab bar, matching how per-agent detail pages render.
+ * Fleet tab bar, matching how per-agent detail pages render.
  */
 export function AgentFleetApprovalsPane({
   selectedId,
@@ -149,7 +149,7 @@ export function AgentFleetApprovalsPane({
           className="flex w-fit items-center gap-1.5 text-[12px] text-gray-11 no-underline hover:text-gray-12"
         >
           <ArrowLeftIcon size={13} />
-          Applications
+          Fleet
         </Link>
         <Flex align="center" gap="2" wrap="wrap">
           <Text className="font-bold text-[22px] text-gray-12 leading-tight tracking-tight">

packages/ui/src/features/agent-applications/components/AgentFleetLiveSessionsPanel.tsx

@@ -15,7 +15,7 @@ import { sessionStateColor } from "../utils/format";
 import { RefreshIndicator } from "./RefreshIndicator";
 
 /**
- * Cross-agent in-flight sessions, surfaced on the Applications landing. Lists
+ * Cross-agent in-flight sessions, surfaced on the Fleet landing. Lists
  * non-terminal sessions across the fleet with state, agent, trigger, turn count
  * and started-ago; clicking a row navigates to the per-agent session detail.
  * Polls aggressively (see {@link useAgentFleetLiveSessions}) so the panel feels

packages/ui/src/features/agent-applications/featureFlag.ts

@@ -1,5 +1,5 @@
 /**
- * Gates the whole agent-platform surface in PostHog Code: the Applications tab
+ * Gates the whole agent-platform surface in PostHog Code: the Fleet tab
  * content (list + per-agent detail) and the always-on Agent Builder dock. The
  * Scouts tab is unaffected. Mirrors the `agent-platform` flag on the PostHog
  * side (`FEATURE_FLAGS.AGENT_PLATFORM`). Hidden until GA.

packages/ui/src/features/agents/components/AgentsTabLayout.tsx

@@ -22,7 +22,7 @@ const TAB_DESCRIPTION: Record<AgentsTab, string> = {
 /**
  * Shared chrome for the two top-level Agents tabs. Each tab view renders its
  * own content inside this layout and declares which tab is active, so the
- * header + tab bar stay identical across Scouts and Applications while detail
+ * header + tab bar stay identical across Scouts and Fleet while detail
  * pages (a scout, an agent, a session) keep their own focused chrome.
  */
 export function AgentsTabLayout({
@@ -50,7 +50,7 @@ export function AgentsTabLayout({
   const pageContext: AgentBuilderPageContext =
     activeTab === "applications" ? { kind: "agent-list" } : { kind: "scouts" };
   useSetAgentBuilderPage(pageContext);
-  // The Applications tab is gated behind the agent-platform flag.
+  // The Fleet tab is gated behind the agent-platform flag.
   const applicationsEnabled = useFeatureFlag(AGENT_PLATFORM_FLAG);
 
   return (
@@ -76,7 +76,7 @@ export function AgentsTabLayout({
           {applicationsEnabled ? (
             <TabLink
               to="/code/agents/applications"
-              label="Applications"
+              label="Fleet"
               active={activeTab === "applications"}
             />
           ) : null}