Replaces the caret-dropdown preset menu with two stacked cards:
Groups (top) — saved bundles of projects; click to open the archive
with that group's project set; per-row edit/delete
buttons.
Projects — filterable table; in default mode no checkboxes,
click any row to open just that project.
"+ New group" or a row's edit button enters select-mode: checkboxes
appear on each project row, an action bar shows above the projects card
with Save group / Open visible-checked / Cancel.
"Open visible-checked" intentionally excludes filter-hidden checked
projects so users can scope to a subset they're currently looking at.
Storage migrates from old zddc_landing_presets to zddc_landing_groups
(simpler shape: {name, projects: [...]}). One-shot migration runs on
first load.
Adds the new favicon SVG to the landing header alongside the title.
Drops the ?projects= URL state since selection is no longer the page's
primary state in click-to-open mode.
Updates Playwright suite: 9 new test cases covering click-to-open, group
crud, edit pre-population, "open selected visible" scoping, and legacy
preset migration. Adds a LandingApp._setNavigate test hook since
window.location.href cannot be reliably patched in modern engines.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
ZDDC
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