Match the shipped styling to the Claude Design drafts

An audit of all twelve draft files against the build turned up a set of
mismatches, most of them in the tier-2 token layer rather than in any one
component. Tier 1 is untouched throughout - only the meanings moved.

SHAPE. The drafts draw three corners, not five: 2px for a tag, thumbnail,
flag or checkbox, 4px for anything with a box, and fully round for a filter
chip or status pill. Nothing in any draft is 8px or 12px. --radius-card and
--radius-surface therefore come down to radius/sm, a --radius-chip is added
for the 2px tier, and --radius-control-lg - a quirk of the Figma Button
frame's ghost cells - is retired along with its four consumers.

ELEVATION. A shadow is a fraction of the ground it falls on, and the ramp
was tuned for a white page: on the drafts' near-black ground a 12-28% black
is invisible. Tier 1 gains the two deep steps the drafts actually draw
(--shadow-dark-lg/xl), and --elevation-card/-popover/-modal move into the
per-surface blocks so the dark surface can take them while the light one
keeps the soft ramp. A resting card now has no shadow at all - the drafts
separate with a hairline - and the black is spent on what floats.

CARDS. The hover was a white-24% hairline and a faint glow; the drafts turn
the hairline accent green, lift the card 6px and land a deep black under it.
The lift is pointer-only and is dropped under prefers-reduced-motion.

GHOST IS A TEXT LINK. The drafts never fill a ghost control - every
"All updates ->" is plain text that turns green while the label-to-arrow gap
opens. The tokens carry no fill in any state and the variant opts out of the
3px lift, which also retires the WCAG workaround the old Figma hover forced
(green label on a green fill, 1.40:1).

NAVIGATION. A nav label rests in text/secondary and brightens to primary;
the current section stays primary and is marked by the accent rule, not by
green text.

HERO STRIPE. The middle block was painted near-black against a comment
claiming the redesign had dropped white; the drafts paint it #F8F9FA. Back
to background/inverse, and to the drafts' 390 : 495 : 363 split.

styles/README.md is updated to match, including a contrast table that still
described --surface-raised as the retired #2e2e2c.

Not changed, because each is a decision rather than a defect: the drafts set
every eyebrow, tag and meta line in IBM Plex Mono at 10-11px with 1.2-1.4px
tracking (a third typeface, and no Arabic counterpart); draft headings are
weight 800, which needs a font file we do not have; and the EU badge
statement stays at --text-primary, since the visibility lockup is
contractual.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

apps/web/app/components/ui/Input/Input.css

@@ -82,7 +82,7 @@
     background-color: var(--field-bg);
     color: var(--field-fg);
     border: var(--control-border-width) solid var(--field-border);
-    border-radius: var(--radius-control-lg);
+    border-radius: var(--radius-control);
     padding-inline: calc(var(--control-padding-inline-md) - var(--control-border-width));
     padding-block: calc(var(--control-padding-block-md) - var(--control-border-width));
     text-align: start;