Adds a URL-driven toggle (?labels=true, mirroring embed=va) that
swaps grid column headers between NAME and LABEL in both the Viewer
and Editor, with a "Show labels"/"Show names" item in each grid's
right-click context menu. The header-info popup now shows NAME first
regardless of display mode. Sorting/filtering/data binding stay
NAME-based throughout — only the displayed header text changes.
New shared, unit-tested utils (parse-labels-param, display-col-headers,
col-info-html) back both pages. Mock data (viewdata.js, getdata.js)
gains a couple of columns with LABEL != NAME plus a blank-LABEL case,
covered by a new viewer-labels.cy.ts e2e spec now wired into CI.
Also fixes a pre-existing gap in cypress/support/commands.ts: the
isLoggedIn/loginAndUpdateValidKey custom commands had no Cypress
Chainable type augmentation, and moment was imported as a namespace
import despite its `export =` typing making it uncallable that way.
YuryShkoda
25c12f2b18