feat(apps): stepped creation wizard, branch previews, and app-creation fixes

This session (frontend focus):
- Rebuild /apps/new as a 4-step wizard (Basics → Configure → Trigger → Review):
  WizardRail, SourceKindPicker card grid, AppManifest review, per-step validation,
  ConfirmDialog-based unsaved-changes guard.
- Extract lib/workload/sourceForms.ts (single source of truth for source_config)
  + {Image,Compose,Static,Dockerfile}SourceForm + StaticDiscoveryWizard; fold the
  /apps/[id] edit form onto the same components (removes the duplication). Add
  vitest + sourceForms unit tests.
- Branch preview environments UI: /chain is_preview/preview_branch + a Preview
  environments panel on /apps/[id] (per-branch URLs, ConfirmDialog teardown, armed
  state); RegistryImagePicker on the registry trigger and the image source.
- Fixes: image-inspect 404 -> admin-gated POST /api/discovery/image/inspect;
  conflict-panel blur flicker; friendly localized discovery errors; CPU/Memory
  label hints; dashboard + /apps "Total workloads" count only source_kind workloads
  (drop stale trigger_kind gate); NPM cert/access-list name cache; EntityPicker
  empty-list guard.
- Update CLAUDE.md frontend conventions + add a Build & Test section.

Also captures pre-existing in-progress platform work (not from this session):
workload notifications, Prometheus metrics export, store lockfile, health probes,
backup hardening, and related store/webhook/scheduler changes.

web/src/routes/+page.svelte

@@ -70,7 +70,12 @@
 		return () => { loadController?.abort(); };
 	});
 
-	const totalWorkloads = $derived(workloads.length);
+	// Plugin-native workloads only. Legacy pre-cutover rows (kind project/
+	// stack/site) carry an empty source_kind and have no UI home post-cutover,
+	// so they must not inflate the headline count or the recent strip — this
+	// matches the /apps list, which shows the same set.
+	const pluginWorkloads = $derived(workloads.filter((w) => w.source_kind !== ''));
+	const totalWorkloads = $derived(pluginWorkloads.length);
 	const totalRunning = $derived(containers.filter((c) => c.state === 'running').length);
 	const totalFailed = $derived(containers.filter((c) => c.state === 'failed').length);
 	const totalStale = $derived(staleContainers.length);
@@ -78,7 +83,7 @@
 	// Latest 6 workloads by updated_at desc — enough for an at-a-glance
 	// recent-activity strip without paging the entire list.
 	const recentWorkloads = $derived(
-		[...workloads]
+		[...pluginWorkloads]
 			.sort((a, b) => (b.updated_at ?? '').localeCompare(a.updated_at ?? ''))
 			.slice(0, 6)
 	);
@@ -113,7 +118,7 @@
 	{/snippet}
 	<ForgeHero
 		eyebrow="THE FORGE"
-		eyebrowSuffix="DASHBOARD"
+		eyebrowSuffix={$t('nav.dashboard').toUpperCase()}
 		title={$t('dashboard.title')}
 		accent="."
 		size="lg"
@@ -125,22 +130,22 @@
 		<a href="/apps" class="forge-stat stat-link">
 			<span class="forge-stat-label">{$t('dashboard.totalWorkloads')}</span>
 			<span class="forge-stat-value">{String(totalWorkloads).padStart(2, '0')}</span>
-			<span class="forge-stat-sub">workloads →</span>
+			<span class="forge-stat-sub">{$t('dashboard.statSubWorkloads')}</span>
 		</a>
 		<a href="/containers" class="forge-stat stat-link">
 			<span class="forge-stat-label">{$t('dashboard.runningContainers')}</span>
 			<span class="forge-stat-value accent">{String(totalRunning).padStart(2, '0')}</span>
-			<span class="forge-stat-sub">running</span>
+			<span class="forge-stat-sub">{$t('dashboard.statSubRunning')}</span>
 		</a>
 		<a href="/containers?state=failed" class="forge-stat stat-link">
 			<span class="forge-stat-label">{$t('dashboard.failedContainers')}</span>
 			<span class="forge-stat-value" class:fail={totalFailed > 0}>{String(totalFailed).padStart(2, '0')}</span>
-			<span class="forge-stat-sub">need attention</span>
+			<span class="forge-stat-sub">{$t('dashboard.statSubNeedAttention')}</span>
 		</a>
 		<a href="/containers/stale" class="forge-stat stat-link">
 			<span class="forge-stat-label">{$t('dashboard.staleContainers')}</span>
 			<span class="forge-stat-value" class:warn={totalStale > 0}>{String(totalStale).padStart(2, '0')}</span>
-			<span class="forge-stat-sub">stale →</span>
+			<span class="forge-stat-sub">{$t('dashboard.statSubStale')}</span>
 		</a>
 	</div>