Stream update progress into a bar on the stack's row (0.42.0)

Update ran as a blocking POST with nothing to show but a spinner, so the
status added in 86c67df could only sit above the table as a banner.

Adds /ws/update/{stack_id}, streaming `compose pull` then `up -d` with
--progress json, and feeds it through the existing DeployTracker — the
same weighting the deploy console uses. The result renders as a progress
bar inside the stack's own row: percentage, phase label, and layer/byte
detail. Non-streaming actions (start/stop/restart/pull/down) reuse the
bar in its indeterminate form, so every row action looks consistent.

compose_service gains _stream_phase, shared by stream_up and the new
stream_update; a failed pull short-circuits before `up`.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_016pMmFFkdfxkoYjcEcpZTa5

frontend/src/pages/Dashboard.tsx

@@ -5,7 +5,6 @@ import { toast } from "sonner";
 import { Card } from "@/components/ui";
 import { HostHeader } from "@/components/hosts/HostHeader";
 import { StacksTable } from "@/components/stacks/StacksTable";
-import { ActionStatusList } from "@/components/stacks/ActionStatusBanner";
 import { AttentionStrip } from "@/components/dashboard/AttentionStrip";
 import { FleetKpiRow } from "@/components/dashboard/FleetKpiRow";
 import { StackStatusBar } from "@/components/dashboard/StackStatusBar";
@@ -22,7 +21,7 @@ import type { Agent } from "@/types";
 
 export function Dashboard() {
   const isAdmin = useAuthStore((s) => s.user?.role === "admin");
-  const { isBusy, statuses, dismissStatus, start, stop, restart } = useStackActions();
+  const { isBusy, statusFor, dismissStatus, start, stop, restart } = useStackActions();
   const qc = useQueryClient();
   const [refreshing, setRefreshing] = useState(false);
 
@@ -113,8 +112,6 @@ export function Dashboard() {
         </>
       )}
 
-      <ActionStatusList statuses={statuses} onDismiss={dismissStatus} />
-
       {/* ---- Local host stacks ---- */}
       <section>
         {hasAgents ? <HostHeader /> : <h2 className="sp-label mb-3">This host</h2>}
@@ -125,6 +122,8 @@ export function Dashboard() {
           hostMem={info.data?.ram.total ?? 0}
           isAdmin={isAdmin}
           isBusy={isBusy}
+          statusFor={statusFor}
+          onDismissStatus={dismissStatus}
           loading={stacks.isLoading}
           onStart={start}
           onStop={stop}