feat(web/m7-scan-progress): StageBadge + 4-card layout updates

Each of the 4 stage cards in the admin Library Scan section gains a
StageBadge in its header. The badge derives state via stageState()
from the existing ScanStatus payload — no new query, no schema
change. Active stage shows spinner + "Processing" in moss green;
done shows check + "Done" in moss green; pending and skipped show
muted text.

Card body now shows either the (possibly partial) numbers OR a
"Waiting for previous stage…" placeholder when the badge is
pending. The previous bottom-of-card "Pending…" / "Skipped."
fallback text disappears (the badge replaces it).

StageBadge.test.ts covers the four state renderings.
admin.test.ts adds one new case asserting the Processing badge
shows when scan.library is populated and in_flight: true. Existing
admin.test.ts assertions still pass (the default mock data has no
stage tallies + in_flight: false → all stages skipped, no Loader/
Check icons rendered).

web/src/lib/components/StageBadge.svelte

@@ -0,0 +1,22 @@
+<script lang="ts">
+  import { Loader2, Check } from 'lucide-svelte';
+
+  type Props = { state: 'pending' | 'in_progress' | 'done' | 'skipped' };
+  let { state }: Props = $props();
+</script>
+
+{#if state === 'in_progress'}
+  <span class="inline-flex items-center gap-1 text-xs text-action-primary">
+    <Loader2 size={12} class="animate-spin" />
+    Processing
+  </span>
+{:else if state === 'done'}
+  <span class="inline-flex items-center gap-1 text-xs text-action-primary">
+    <Check size={12} />
+    Done
+  </span>
+{:else if state === 'pending'}
+  <span class="text-xs text-text-muted">Pending</span>
+{:else}
+  <span class="text-xs text-text-muted">Skipped</span>
+{/if}

web/src/lib/components/StageBadge.test.ts

@@ -0,0 +1,31 @@
+import { describe, it, expect } from 'vitest';
+import { render, screen } from '@testing-library/svelte';
+import StageBadge from './StageBadge.svelte';
+
+describe('StageBadge', () => {
+  it('renders Processing + spinner when state is in_progress', () => {
+    render(StageBadge, { props: { state: 'in_progress' } });
+    expect(screen.getByText('Processing')).toBeInTheDocument();
+    // The spinner is a lucide icon — just confirm a child SVG exists.
+    expect(document.querySelector('svg')).toBeTruthy();
+  });
+
+  it('renders Done + check when state is done', () => {
+    render(StageBadge, { props: { state: 'done' } });
+    expect(screen.getByText('Done')).toBeInTheDocument();
+    expect(document.querySelector('svg')).toBeTruthy();
+  });
+
+  it('renders Pending muted when state is pending', () => {
+    render(StageBadge, { props: { state: 'pending' } });
+    expect(screen.getByText('Pending')).toBeInTheDocument();
+    // No icon for the muted states.
+    expect(document.querySelector('svg')).toBeFalsy();
+  });
+
+  it('renders Skipped muted when state is skipped', () => {
+    render(StageBadge, { props: { state: 'skipped' } });
+    expect(screen.getByText('Skipped')).toBeInTheDocument();
+    expect(document.querySelector('svg')).toBeFalsy();
+  });
+});

web/src/routes/admin/+page.svelte

@@ -1,6 +1,8 @@
 <script lang="ts">
   import { pageTitle } from '$lib/branding';
   import { Disc3, Album, Music2, Check, X, RotateCcw, Trash2, Cloud, ChevronRight } from 'lucide-svelte';
+  import StageBadge from '$lib/components/StageBadge.svelte';
+  import { stageState } from './stage-state';
   import { useQueryClient } from '@tanstack/svelte-query';
   import {
     createAdminRequestsQuery,
@@ -346,7 +348,10 @@
       <div class="mt-3 grid gap-3 sm:grid-cols-4">
         <!-- Library stage -->
         <div class="rounded border border-border bg-bg p-3">
-          <div class="text-xs font-medium uppercase tracking-wide text-text-muted">Library walk</div>
+          <div class="flex items-baseline justify-between gap-2">
+            <div class="text-xs font-medium uppercase tracking-wide text-text-muted">Library walk</div>
+            <StageBadge state={stageState(scan, 'library')} />
+          </div>
           {#if scan.library}
             <dl class="mt-2 space-y-0.5 text-sm">
               <div class="flex justify-between"><dt class="text-text-secondary">Scanned</dt><dd>{scan.library.scanned}</dd></div>
@@ -355,14 +360,17 @@
               <div class="flex justify-between"><dt class="text-text-secondary">Skipped</dt><dd>{scan.library.skipped}</dd></div>
               <div class="flex justify-between"><dt class="text-text-secondary">Errored</dt><dd>{scan.library.errored}</dd></div>
             </dl>
-          {:else}
-            <p class="mt-2 text-sm text-text-muted">{scanInFlight ? 'Pending…' : 'Skipped.'}</p>
+          {:else if stageState(scan, 'library') === 'pending'}
+            <p class="mt-2 text-sm text-text-muted">Waiting for previous stage…</p>
           {/if}
         </div>
 
         <!-- MBID backfill stage -->
         <div class="rounded border border-border bg-bg p-3">
-          <div class="text-xs font-medium uppercase tracking-wide text-text-muted">MBID backfill</div>
+          <div class="flex items-baseline justify-between gap-2">
+            <div class="text-xs font-medium uppercase tracking-wide text-text-muted">MBID backfill</div>
+            <StageBadge state={stageState(scan, 'mbid_backfill')} />
+          </div>
           {#if scan.mbid_backfill}
             <dl class="mt-2 space-y-0.5 text-sm">
               <div class="flex justify-between"><dt class="text-text-secondary">Processed</dt><dd>{scan.mbid_backfill.processed}</dd></div>
@@ -370,36 +378,42 @@
               <div class="flex justify-between"><dt class="text-text-secondary">Skipped</dt><dd>{scan.mbid_backfill.skipped}</dd></div>
               <div class="flex justify-between"><dt class="text-text-secondary">Duplicates</dt><dd>{scan.mbid_backfill.duplicates ?? 0}</dd></div>
             </dl>
-          {:else}
-            <p class="mt-2 text-sm text-text-muted">{scanInFlight ? 'Pending…' : 'Skipped.'}</p>
+          {:else if stageState(scan, 'mbid_backfill') === 'pending'}
+            <p class="mt-2 text-sm text-text-muted">Waiting for previous stage…</p>
           {/if}
         </div>
 
         <!-- Cover enrichment stage -->
         <div class="rounded border border-border bg-bg p-3">
-          <div class="text-xs font-medium uppercase tracking-wide text-text-muted">Cover enrichment</div>
+          <div class="flex items-baseline justify-between gap-2">
+            <div class="text-xs font-medium uppercase tracking-wide text-text-muted">Cover enrichment</div>
+            <StageBadge state={stageState(scan, 'cover_enrich')} />
+          </div>
           {#if scan.cover_enrich}
             <dl class="mt-2 space-y-0.5 text-sm">
               <div class="flex justify-between"><dt class="text-text-secondary">Processed</dt><dd>{scan.cover_enrich.processed}</dd></div>
               <div class="flex justify-between"><dt class="text-text-secondary">Succeeded</dt><dd>{scan.cover_enrich.succeeded}</dd></div>
               <div class="flex justify-between"><dt class="text-text-secondary">Failed</dt><dd>{scan.cover_enrich.failed}</dd></div>
             </dl>
-          {:else}
-            <p class="mt-2 text-sm text-text-muted">{scanInFlight ? 'Pending…' : 'Skipped.'}</p>
+          {:else if stageState(scan, 'cover_enrich') === 'pending'}
+            <p class="mt-2 text-sm text-text-muted">Waiting for previous stage…</p>
           {/if}
         </div>
 
         <!-- Artist art enrichment stage -->
         <div class="rounded border border-border bg-bg p-3">
-          <div class="text-xs font-medium uppercase tracking-wide text-text-muted">Artist art</div>
+          <div class="flex items-baseline justify-between gap-2">
+            <div class="text-xs font-medium uppercase tracking-wide text-text-muted">Artist art</div>
+            <StageBadge state={stageState(scan, 'artist_art_enrich')} />
+          </div>
           {#if scan.artist_art_enrich}
             <dl class="mt-2 space-y-0.5 text-sm">
               <div class="flex justify-between"><dt class="text-text-secondary">Processed</dt><dd>{scan.artist_art_enrich.processed}</dd></div>
               <div class="flex justify-between"><dt class="text-text-secondary">Succeeded</dt><dd>{scan.artist_art_enrich.succeeded}</dd></div>
               <div class="flex justify-between"><dt class="text-text-secondary">Failed</dt><dd>{scan.artist_art_enrich.failed}</dd></div>
             </dl>
-          {:else}
-            <p class="mt-2 text-sm text-text-muted">{scanInFlight ? 'Pending…' : 'Skipped.'}</p>
+          {:else if stageState(scan, 'artist_art_enrich') === 'pending'}
+            <p class="mt-2 text-sm text-text-muted">Waiting for previous stage…</p>
           {/if}
         </div>
       </div>

web/src/routes/admin/admin.test.ts

@@ -22,12 +22,13 @@ vi.mock('$lib/api/admin', async () => {
     createAdminRequestsQuery: vi.fn(),
     createLidarrConfigQuery: vi.fn(),
     createAdminQuarantineQuery: vi.fn(),
-    createScanStatusQuery: () =>
+    createScanStatusQuery: vi.fn(() =>
       readable({
         data: { id: '', started_at: '', finished_at: null, in_flight: false },
         isPending: false,
         isError: false
-      }),
+      })
+    ),
     createCoverageQuery: () =>
       readable({
         data: undefined,
@@ -91,6 +92,7 @@ import {
   createAdminRequestsQuery,
   createLidarrConfigQuery,
   createAdminQuarantineQuery,
+  createScanStatusQuery,
   approveRequest,
   rejectRequest,
   resolveQuarantine,
@@ -239,4 +241,25 @@ describe('admin Overview page', () => {
       'href', '/admin/requests'
     );
   });
+
+  test('Library scan card shows Processing badge when library tally is populated and in-flight', async () => {
+    const { readable } = await import('svelte/store');
+    (createScanStatusQuery as ReturnType<typeof vi.fn>).mockReturnValueOnce(
+      readable({
+        data: {
+          id: 'in-flight',
+          started_at: '2026-05-06T11:00:00Z',
+          finished_at: null,
+          in_flight: true,
+          library: { scanned: 100, added: 1, updated: 0, skipped: 99, errored: 0 }
+        },
+        isPending: false,
+        isError: false
+      })
+    );
+    setupOverview();
+    userState.current = { id: 'admin', username: 'admin', is_admin: true };
+    render(OverviewPage);
+    expect(await screen.findByText('Processing')).toBeInTheDocument();
+  });
 });