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/BulkBar.tsx

@@ -14,23 +14,40 @@ export function BulkBar({
   if (count === 0) return null;
   return (
     <div
-      className="fixed bottom-4 left-1/2 px-4 py-2 font-mono flex gap-3 z-20"
+      className="fixed bottom-6 left-1/2 px-3 py-2.5 mono flex items-center gap-2 z-20 rounded-md"
       style={{
         transform: "translateX(-50%)",
         background: "var(--tt-bg-elev)",
         border: "1px solid var(--tt-amber)",
         color: "var(--tt-ink)",
         fontSize: 11,
+        boxShadow:
+          "0 0 0 1px hsl(36 88% 56% / 0.15), 0 12px 40px -8px hsl(0 0% 0% / 0.6), inset 0 1px 0 0 hsl(0 0% 100% / 0.04)",
       }}
     >
-      <span className="tabular-nums" style={{ color: "var(--tt-amber)" }}>
-        {count} selected
+      <span
+        className="tabular-nums flex items-center gap-1.5 px-2 py-0.5 rounded-sm"
+        style={{
+          color: "var(--tt-bg)",
+          background: "var(--tt-amber)",
+          fontWeight: 700,
+          fontSize: 11,
+          letterSpacing: "0.04em",
+        }}
+      >
+        {count}
       </span>
+      <span style={{ color: "var(--tt-amber)", letterSpacing: "0.12em", textTransform: "uppercase" }}>
+        selected
+      </span>
+
+      <span className="mx-1 h-4 w-px" style={{ background: "var(--tt-muted)" }} aria-hidden />
+
       {lane === "rejected" && (
         <button
           onClick={onResubmit}
-          className="hover:underline"
-          style={{ color: "var(--tt-ink)" }}
+          className="px-2.5 py-1 rounded-sm uppercase tracking-[0.12em] transition-colors hover:bg-[color:var(--tt-amber)]/10 focus-visible:outline-none focus-visible:bg-[color:var(--tt-amber)]/10"
+          style={{ color: "var(--tt-ink)", fontWeight: 600 }}
         >
           Re-submit ({count})
         </button>
@@ -38,16 +55,16 @@ export function BulkBar({
       {lane === "candidates" && (
         <button
           onClick={onDismiss}
-          className="hover:underline"
-          style={{ color: "var(--tt-ink)" }}
+          className="px-2.5 py-1 rounded-sm uppercase tracking-[0.12em] transition-colors hover:bg-[color:var(--tt-amber)]/10 focus-visible:outline-none focus-visible:bg-[color:var(--tt-amber)]/10"
+          style={{ color: "var(--tt-ink)", fontWeight: 600 }}
         >
           Dismiss ({count})
         </button>
       )}
       <button
         onClick={onExport}
-        className="hover:underline"
-        style={{ color: "var(--tt-ink)" }}
+        className="px-2.5 py-1 rounded-sm uppercase tracking-[0.12em] transition-colors hover:bg-[color:var(--tt-amber)]/10 focus-visible:outline-none focus-visible:bg-[color:var(--tt-amber)]/10"
+        style={{ color: "var(--tt-ink)", fontWeight: 600 }}
       >
         Export CSV ({count})
       </button>