Defer promotion snapshots to campaign activation

src/lib/operation-flow.ts

@@ -29,12 +29,19 @@ export function betaFlow(beta: { state: string; wait_for_health: number; wait_fo
         : 'pending' }));
 }
 
-export function campaignFlow(servers: { restart_state: string; restarted_at: string | null; files_changed: number }[], finished: boolean): OperationStep[] {
+export function campaignFlow(servers: { server?: string; restart_state: string; restarted_at: string | null; files_changed: number }[], finished: boolean,
+    files: { server: string; snapshot_pending: number; apply_state: string }[] = []): OperationStep[] {
     const active = servers.filter(s => !['skipped', 'cancelled'].includes(s.restart_state));
-    const positions = active.map(s => s.restart_state === 'done' ? 4
-        : s.restarted_at ? 3 : 0);
-    const current = positions.length ? Math.min(...positions) : finished ? 4 : 0;
-    return ['Wait for empty servers and restart capacity', 'Apply file changes', 'Restart servers', 'Verify health'].map((label, i) => ({
+    const positions = active.map(s => {
+        if (s.restart_state === 'done') return 5;
+        if (s.restarted_at) return 4;
+        const changes = files.filter(f => f.server === s.server && f.apply_state !== 'cancelled');
+        if (changes.some(f => f.apply_state === 'applying')) return changes.some(f => f.snapshot_pending) ? 1 : 2;
+        if (changes.length && changes.every(f => f.apply_state === 'applied')) return 3;
+        return 0;
+    });
+    const current = positions.length ? Math.min(...positions) : finished ? 5 : 0;
+    return ['Wait for empty servers and restart capacity', 'Capture rollback snapshots', 'Apply file changes', 'Restart servers', 'Verify health'].map((label, i) => ({
         label, state: i < current ? 'done' : i !== current ? 'pending'
             : active.some((s, j) => s.restart_state === 'failed' && positions[j] === i) ? 'failed'
             : active.some(s => ['manual', 'held'].includes(s.restart_state)) ? 'pending' : 'current'