- getDoc/getCollection/subscribe inject {id,...data} (main firebase shape)
- getCollection normalizes backend {id,data}[] OR bare data[] → {id,...data}
- setDoc(opts.merge) → PATCH (create-on-miss); else PUT (replace)
- ws-reconnect test asserts id now present
24/24 server green. All suites green: App 83, shared 91, server 24.