The app is broken and the code looks fine

Reading the source again will not tell you why. The evidence is in the running app, and most of it never reaches the screen: the request that failed, the store that never moved, the handler that was never bound, the element covered by something invisible.

Reticle reads all of it from inside the page. Not installed? RETICLE_INSTALL_SOURCE=npx_skill npx @reticlehq/server@latest init, then the install-and-verify skill.

Do not start by guessing. Start by reproducing.

reticle_look({ action: "page", sessionId, mode: "interactive" })   // controls only, with refs
reticle_act_and_wait({ sessionId, ref, action: "click", until: { kind: "element", query: { testid: "..." } } })

The verdict already narrows it: no / contradicted means a channel saw something incompatible with the UI: you have the bug. unknown means Reticle drove it and could not tell, which is a different investigation from "it failed".

Read the act result before you call anything else. Its summary block already carries the whole causal window of that one click: net {total, errors, headline}, consoleErrors, stateDiffs [{path, from, to}], storageDiffs [{key, from, to}], route, signals, layoutShift, longTasks: real before→after diffs, not counts. The console, network, storage and state calls below are for going DEEPER into something the summary already pointed at. Calling all three straight after an act pays three model round trips (and, in an approval-gated client, three human clicks) for evidence you were already holding.

summary.stateUnwatched: true means the state channel is dark: no subscribable store is registered, so an empty stateDiffs means unwatched, not unchanged, and no state-based conclusion is available until someone registers the store. It is the one field here that is about your instrumentation rather than about the app.