[Waterfall] Manage Waterfall layout and navigation state

[mossy426-cdc]

Story Key: waterfall-view:manage-view-layout

User Story

As a MicrobeTrace user, I want to use the Waterfall view within the app layout, so that I can navigate, resize, and restore the view without losing context.

Workflow / Use Case

Open, close, resize, switch, or restore the Waterfall view through the covered layout paths and verify the view remains usable.

Expected Behavior

Waterfall remains stable through layout, dashboard, navigation, and hidden-pane lifecycle changes.

Acceptance Criteria

• Given the linked QA tracker scenarios, when the user performs the covered Waterfall workflow, then the expected behavior remains true for each listed fixture and spec.
• Given the listed Cypress specs are run, when they pass, then this story has automated evidence for the grouped acceptance checks.
• Given linked QA evidence changes, when this story is regenerated, then tested fixtures, specs, and coverage notes stay aligned with the current QA trackers.

QA Tracker Evidence

• waterfall-view:W023

Tested Against

Fixtures

• TestStyleNodelist_snp.csv
• TestStyleEdgelist_snp.csv

Cypress Specs

• cypress/e2e/journeys/flows/waterfall-tab-persistence-uploaded.cy.ts

Coverage Notes
Grouped from 1 QA tracker row(s): View-switch persistence after leaving Waterfall. Source areas: Waterfall Navigation.

Source References

• User story row: docs/user-stories.csv#L100
• Branch: dev
• Commit: f4b481eb2242d2a89251300c3b94eaf09c842e04
• Generated by: mossy426-cdc
• Epic / Feature Group: Waterfall
• Story Type: Visualization Behavior
• Priority: P1
• Story Review Status: Draft
• Source Confidence: High
• Last reviewed: 2026-04-22

Story Notes

Generated as a grouped user story from QA tracker evidence. Review title and behavior language before enabling story_sync.

Definition of Done

• Acceptance criteria are satisfied.
• Linked QA tracker evidence remains current.
• Relevant Cypress coverage remains passing or any coverage gap is documented.
• Expected behavior remains distinguishable from bug or enhancement requests.

Manual Notes

Reviewer notes added below this line are preserved by future sync runs.