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ktx-akshay
78998b5fa3
Adds E2E regression cover for the fix in #13812. The Logs → Build toggle mounts PanelFieldList with pageKey "build" in edit mode, which deferred its stream-list fetch until a stream was already set. Since ZO_QUERY_ON_STREAM_SELECTION defaults to true, the logs page selects nothing, so Build mounted blank and its Stream dropdown was left enabled, openable and permanently empty on "No options found" — no way to pick a stream, no way out. ## Tests (Logs-SelectStar shard) - **P0** — with no stream selected on the logs page, the Build tab's Stream dropdown is populated and a stream can actually be picked: no empty state, options render, `e2e_automate` is offered, selecting it lands, and the field list loads that stream's schema. - **P1** — changing Stream Type with a blank stream refetches the list: logs → traces drops `e2e_automate` (a logs stream) and loads a real traces list, switching back restores it. Covers the stream_type watcher, which is gated on the same `initialStreamsLoaded` flag the fix arms. `beforeEach` asserts the logs page starts with no stream selected — without that precondition both tests would pass against the buggy build. ## Notes - Page-object locators are scoped to `[data-test="logs-build-query-page"]`: the Visualize tab mounts a second PanelEditor that stays in the DOM under `v-show`, so an unscoped `index-dropdown-stream` is a strict-mode violation. - Verified 6/6 green over 3 repeats locally. The shard runs the backend with ZO_QUICK_MODE_ENABLED=true, which the local instance does not — assertions avoid named fields so quick mode's field narrowing can't affect them.