Improve operational UX, recovery flows, and action safety

Implement the approved UX review across Fleet, Betas, Library, deployments, and Settings. Add reviewed promotion and reconciliation plans, atomic queued-removal cancellation, recoverable beta drafts and launch inputs, accessible controls, and mobile improvements.

Validated with 473 tests, a clean typecheck, production build, and isolated desktop/mobile browser walkthroughs. Include the review and implementation coverage notes.

src/routes/api/betas/[id]/+server.ts

@@ -31,5 +31,9 @@ export async function GET({ params }: { params: { id: string } }) {
     const servers = listBetaServers(id);
 
     const events = db().prepare('SELECT id, created_at, message FROM beta_events WHERE beta_id = ? ORDER BY id').all(id);
-    return json({ beta, scripts, servers, events, test: testView(id) });
+    const rollout = db().prepare("SELECT id FROM deployments WHERE beta_id = ? AND action = 'promote' ORDER BY started_at DESC LIMIT 1").get(id) as { id: string } | undefined;
+    const promotion = rollout ? { ...rollout,
+        pending: (db().prepare("SELECT COUNT(*) n FROM deployment_servers WHERE deployment_id = ? AND restart_state NOT IN ('done','failed','cancelled')").get(rollout.id) as { n: number }).n,
+        failed: (db().prepare("SELECT COUNT(*) n FROM deployment_servers WHERE deployment_id = ? AND restart_state = 'failed'").get(rollout.id) as { n: number }).n } : null;
+    return json({ beta, scripts, servers, events, test: testView(id), promotion });
 }