Remove groups: every row moves on its own

[grunion-ai]

What changed

group leaves decklet. A row no longer carries a link to another row, so every text box, tile, bar, node and chip selects, drags, nudges and deletes on its own.

Surface	What went
Model contract	the group prop — validate errors on it: "group is gone — every row moves on its own"
Engine (template.html)	grp(), the marquee's group expansion, the .gbox union outline and its CSS
Layout library	the slot-level group on kpi tiles, cards, callouts, logo plates, team photos, process steps, timeline events and the cta button (the catalogue's own shelf name, group: 'modern', is a different thing and stays)
lib/chart.mjs	the shared id a chart's expansion wore
lib/diagram.mjs	the ids nodes, edges, zones, ticks and the note wore

create strips a group a model written against an older skill still carries, so such a deck still builds, minus the dead link.

Multi-row moves are unchanged and belong to the human: ⌘-click adds a row, a marquee takes what it contains, arrows nudge the lot, and the selection is gone at the next click.

Why

Kyle, 2026-09-15: a text box that cannot be moved away from the box beside it is the wrong object. The link complicated every edit — a press anywhere on a card took the whole card, and taking one row back needed a modifier.

The one non-obvious consequence

The gap gate used a shared group as a collision exemption, and the library leaned on it in two places. Both now rest on geometry:

• Containment is judged on what the model declares. A text row with no stated height is contained by a painted box when its origin and its declared sides sit inside it — a card holds its own copy even when the line-count estimate runs past the card's bottom edge. That overflow is the text-fit gate's business, and verify measures the real glyphs in a browser.
• Two text rows inside ONE painted box, apart only on an estimate — a stat over its label on a kpi tile — are the card's interior, not a collision. A pair that overlaps on an axis both rows declare still fails, as before.

validate --strict stays clean across the library, the 99 templates and the examples.

Verification

• npm test — 346 pass, 0 fail, 0 skipped (baseline on main: 342 pass, 0 fail).
• npm run verify:deck — VERIFY PASS, all 12 slides.
• deck.html, library.html, library-speaker.html and library-reading.html rebuilt from the new engine.

New and rewritten gates:

• test/group.test.mjs is the gate for the absence: the prop rejected, create stripping it, no library slot carrying one, charts and figures emitting none, the engine free of grp/.gbox, plus a live Chromium proof that a card's tile drags alone while its text rows stay, that a text row drags out of its card, and that a marquee still takes what it contains.
• test/diagram.test.mjs reads a figure's parts back out of the rows themselves: a zone is a dashed over:1 box, a node is a row with an id, an edge is a run of line rows closed by to.
• test/editor.test.mjs, test/gate.test.mjs, test/layouts.test.mjs, test/templates.test.mjs, test/icons.test.mjs and test/chart.test.mjs updated to the new contract.

🤖 Generated with Claude Code