Row macrolite

Rows stack inside a `GlassGroup`. A set-valued property (Labels) shows the picks joined by ", " in the team's order and opens the shared picker sheet, never a cloud of toggle chips; nothing picked reads "None".

EXP-818/1076 keep it for REAL CARDS only (a transcript's tool output, a diff) — never a settings list: the settings ladder is a `GlassSectionHeader` band over `SETTINGS_LIST_CLASS` + the flat list row below.

Rows read as a table, not as cards. EXP-962 gave it a second density: `compact` is the 28px one-line row the narrow column runs at (the sidebar's pinned and draft arms, the compact inbox) — the same 14px type, 8px of side padding, 8px to the glyph — and `SidebarMenuButton density="compact"` is its exact twin, so a nav entry and a list row sitting in the same 17rem slot are the same height.

The lead box sits at the same x on every row of a depth, so glyphs and titles align and a child's elbow ends at its own lead. No fold chevron, no trailing chevron, no buttons: a row opens, its menu is a context menu / long-press. Two densities: `compact` (one line, 28-32px: the sidebar's Running, pinned rows) and `list` (36px one-liners, 52px with a caption). Derivations differ only in lead and meta: SessionRow = the run mark + the host device's glyph; an issue row = the status glyph + the assignee; PrRow = the PR ring (a stack swaps the guides for its 1px rail).

A row used to hang under its parent by left padding alone, so three levels of runs read as three arbitrary margins. The indent stays 14px per level; on top of it a row at depth d draws, in its PARENT's 14px gutter, a 1px vertical from its top edge to its vertical centre, a rounded elbow (radius 5) and a stub out to the gutter's right edge — and the vertical carries on to the bottom edge when a sibling follows (a tee). Every ancestor level whose subtree continues below draws a straight full-height line, so a deep child stays attached to every level above it. One hairline weight throughout (the strong glass stroke); a parent draws nothing of its own. The RULE is pure and shared ×4 — it reads nothing but the visible rows' depths — so only the painting is per-platform. In the catalog the guides are a PART of `Row` (its `depth`, inside a `Section tree`), filled by the core's post-expansion pass and never authored on their own.

The shell never draws a stroke — the group's hairlines do.

The whole row is the target, never just the value.

Selection speaks ONE language: SINGLE marks the picked row with a trailing ui-check, MULTI by the row's own highlight wash (data-picked), and a bulk edit over rows that disagree marks the row mixed; never a checkbox, never a circle pair. `value` is the identity and `keywords` the search text, so two boards may share a name; `noneLabel` renders a row that reports null. Single closes on pick, multi stays open. PickerItem is the row shape; the trigger comes in four `triggerVariant`s, pill | field | row | inline (row = the form ladder's picker row, the catalog `Row chevron: selector`). PickerMenuRows draws the same rows inside a Menu.