E2E: stacked-transcript journey clicks a hidden Open note button #491

tests/e2e/journey-transcript.test.ts (the stacked-transcript journey added in #486) fails intermittently with a timeout at line 660, on Obsidian 1.13.7 and 1.14.4.

The test selects the other stacked note (line 656), which collapses the player to its spine, then asks the input helper to click the transcript panel's Open note button. That button is hidden, so tests/e2e/journey/input.ts keeps reporting hidden and never dispatches a click. The product's Open note handler never runs in the failing step, and the runtime error journal is empty. Ten isolated repetitions passed.

Expected: the journey reveals the player through its visible spine (as a user would) before clicking Open note, keeps its placement assertions, and passes reliably in the full suite.

Found by the independent verification of #489. Related: #486.