Panics · P15 Charts: values within charts::LIMIT; scales, shares and tangents stay finite at the edges; entries past their lists are skipped

AGENTS.md

@@ -154,7 +154,7 @@ Ely GPUI Component. A component library for GPUI, in light and dark.
 - Taffy 0.13 collapses a child's vertical margin through a block parent with no padding or border on that side, and its size cache keeps only that block's size, so a box that measures it again leaves the margin out. A component moves a box with a relative offset, or with padding where what follows moves too, not with such a margin: `layout::Drawer` pulls and snaps its panel, and a fullscreen `overlays::Dialog` slides its card, with `top`; `motion::Stagger`, `Transition`, a centered Dialog and the palette's card rise with padding, so the box a scrim centers grows with them; the gallery's inspector sample is its probe's own child. A margin that stops at its parent is safe: a flex or grid item's own, or a child's of a flex item or of a box with padding or a border on that side. A flex wrapper stops the collapse but gives its items a definite height, so percent heights inside start to resolve (the Drawer's `max_h(relative(0.85))`).
 - Tiles in a picture's shape sit in flex rows of `flex_1` cells (`generative::GenerationGrid`). A cell's padding counts in its flex base, so a row of fewer cells gives each more width; cells that match across rows keep their inset on a box inside (`messaging::VideoCallGrid`).
 - Rise reads green and fall red unless a component's `red_up` swaps them, as markets in East Asia read. `finance::quotes::moves` picks the pair.
-- Charts lay out in `f32` pixels of their own box, tested without gpui, and paint through `charts::paint::at`: a canvas's paint gets window coordinates, and `with_element_offset` works only in prepaint. Their sizes come from `theme.chart()`.
+- Charts lay out in `f32` pixels of their own box, tested without gpui, and paint through `charts::paint::at`: a canvas's paint gets window coordinates, and `with_element_offset` works only in prepaint. Their sizes come from `theme.chart()`. A chart value is finite and within ±`charts::LIMIT` (1e30), so sums of values and their pixels stay inside `f32`; the builders refuse others, and a scale works in halves so a domain across the limit maps.
 - A label pinned to a point sits in a zero-size absolute box that centers it with flex (`charts::axes`), so no offset guesses at text size.
 - Tokens live in `src/theme`; the raw `px()` scan skips that folder only.
 - An owner's palette, edited or imported, reaches the theme per mode through `Theme::set_palette`, and `Theme::palette` names the one the shown mode fades to; high contrast strengthens Ely's own palettes alone. A color goes by its field's name through `token` and `token_mut`, on `Palette` and `Syntax` alike. Ely's palettes pass `tooling::A11yChecker`'s audit in both modes, with high contrast and without; a test holds them there.