feat(ui): cohesive frontend polish — design system + per-screen refinement

Distill the UI into a single, recognizable voice: a precision
instrument for one operator on one machine. Bloomberg-coded chrome,
warm-paper detail surfaces, mono-heavy numerics, with one editorial
serif accent for moments of weight.

Design system
- Three-font stack: Geist Sans (UI), Geist Mono (data), Instrument
  Serif (editorial display). No Inter, no system fonts.
- Two surfaces: dark chrome (--background, --accent, --signal) and
  warm paper detail surfaces (--surface, --surface-ink*).
- Inbox has its own Ticker Tape terminal palette (--tt-*).
- Shared component classes: .eyebrow, .mono, .display, .surface,
  .surface-2, .row-hover, .nav-active, .kbd, .editorial, .hairline.
- --m-* token aliases for the legacy drawer components so test-
  asserted class strings keep resolving to the same hue family.

Drawers (Claim + Remit)
- Editorial display face for totals (paid/adjustment amounts).
- Color-coded money tiles: green-tinted paid card, amber-tinted
  adjustment card when non-zero, muted otherwise.
- Tabs get accent-blue underline + CSS-driven active state.
- Validation banners with proper background opacity + ring-around-
  dot success badge.
- StateHistoryTimeline: dashed border, ring around dots, ↳ prefix
  for remit ids.
- DiagnosesList, PartiesGrid, MatchedRemitCard, CasAdjustmentsPanel:
  refined typography, dashed dividers, italic descriptions, mono
  amounts, font-semibold totals, hover row tints.

Inbox Ticker Tape
- Custom RowCheckbox with sr-only input + amber accent.
- Alternating row striping, hover tints, accent rail with inset
  shadow on selection.
- Refined sparkline with glow at high values.
- BulkBar: bottom-floating bar with amber count chip, larger shadow.
- CandidateBreakdown: animated progress bars with amber gradient.
- InboxHeader: Instrument Serif headline, mono day/date stamp,
  pulsing amber status dot.

Dialogs & search
- NewClaimDialog: editorial title, mono NPI/CPT/amount fields.
- SearchBar: refined input row with mono, footer with pulsing
  loading indicator.
- KeyboardCheatsheet: monogram icon chip, hover row states, refined
  eyebrow header.

Primitives
- StatusBadge / ClaimStateBadge: per-state dot indicators.
- SelectItem: data-[highlighted]:outline tokens for keyboard a11y.
- Table primitives: refined header treatment, hover/focus states.

Tests + build
- 354/354 tests passing across 59 files.
- Vite build clean (53.84 kB CSS / 560.86 kB JS).
- Eyebrow assertions updated to match the consolidated .eyebrow
  class (intact visual contract, abstracted class string).
- Badge variant tokens updated to the polished bg-muted/80 /
  /0.14 opacity scale.

src/components/inbox/InboxRow.tsx

@@ -1,4 +1,5 @@
 import type { InboxClaimRow, InboxCandidateRow, ScoreBreakdown } from "@/lib/inbox-api";
+import { cn } from "@/lib/utils";
 
 export type Accent = "oxblood" | "amber" | "ink-blue" | "muted";
 
@@ -30,19 +31,23 @@ function Sparkline({ breakdown }: { breakdown: ScoreBreakdown | null }) {
   if (!breakdown) return null;
   const fields: Array<keyof ScoreBreakdown> = ["patient", "date", "amount", "provider"];
   return (
-    <span className="inline-flex items-end gap-0.5 align-middle h-3">
+    <span className="inline-flex items-end gap-[2px] align-middle h-3.5">
       {fields.map((k) => {
         const v = breakdown[k] as number;
-        const h = Math.max(2, Math.round(v * 12));
+        const h = Math.max(3, Math.round(v * 14));
         return (
           <span
             key={k}
             title={`${k}: ${v.toFixed(2)}`}
-            className="inline-block w-1.5"
-            style={{
-              height: `${h}px`,
-              background: v >= 0.5 ? "var(--tt-amber)" : "var(--tt-muted)",
-            }}
+            className={cn(
+              "inline-block w-[3px] rounded-[1px] transition-all",
+              v >= 0.7
+                ? "bg-[color:var(--tt-amber)] shadow-[0_0_4px_-1px_var(--tt-amber)]"
+                : v >= 0.5
+                  ? "bg-[color:var(--tt-amber)]/70"
+                  : "bg-[color:var(--tt-muted)]"
+            )}
+            style={{ height: `${h}px` }}
           />
         );
       })}
@@ -67,41 +72,48 @@ export function InboxRow({ row, accent, onClick }: Props) {
   return (
     <tr
       onClick={onClick}
-      className="cursor-pointer hover:bg-white/[0.03] transition-colors"
-      style={{ borderBottom: "1px solid var(--tt-bg-elev)" }}
+      className="cursor-pointer transition-colors group"
     >
-      <td style={{ width: 4, background: ACCENT_VAR[accent], padding: 0 }} />
       <td
-        className="py-2 pl-3 font-mono"
-        style={{ color: "var(--tt-ink)", fontSize: 12 }}
+        aria-hidden
+        style={{
+          width: 4,
+          background: ACCENT_VAR[accent],
+          padding: 0,
+          boxShadow: `inset 0 0 0 1px ${ACCENT_VAR[accent]}40`,
+        }}
+      />
+      <td
+        className="py-2.5 pl-3 mono font-semibold"
+        style={{ color: "var(--tt-ink)", fontSize: 12, letterSpacing: "-0.005em" }}
       >
         {id}
       </td>
       <td
-        className="py-2 font-mono"
-        style={{ color: "var(--tt-ink-dim)", fontSize: 11 }}
+        className="py-2.5 mono"
+        style={{ color: reason ? "var(--tt-oxblood)" : "var(--tt-amber)", fontSize: 11 }}
       >
         {reason ?? (topScore != null ? `score ${topScore}` : "")}
       </td>
       <td
-        className="py-2 font-mono tabular-nums"
+        className="py-2.5 mono tabular-nums"
         style={{ color: "var(--tt-ink-dim)", fontSize: 11 }}
       >
         {fmtAgo(rejectedAt)}
       </td>
       <td
-        className="py-2 text-right font-mono tabular-nums"
+        className="py-2.5 text-right mono tabular-nums font-semibold"
         style={{ color: "var(--tt-ink)", fontSize: 12 }}
       >
         {charge}
       </td>
       <td
-        className="py-2 pl-4 uppercase tracking-wider"
-        style={{ color: "var(--tt-ink-dim)", fontSize: 10 }}
+        className="py-2.5 pl-4 mono uppercase"
+        style={{ color: "var(--tt-ink-dim)", fontSize: 10, letterSpacing: "0.14em" }}
       >
         {payer}
       </td>
-      <td className="py-2 pr-3">
+      <td className="py-2.5 pr-3">
         <Sparkline breakdown={filled} />
       </td>
     </tr>