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/InboxHeader.tsx

@@ -7,6 +7,10 @@ export function InboxHeader({
 }) {
   const now = new Date();
   const day = now.toLocaleDateString("en-US", { weekday: "short" }).toUpperCase();
+  const date = now.toLocaleDateString("en-US", {
+    month: "short",
+    day: "2-digit",
+  });
   const time = now.toLocaleTimeString("en-US", {
     hour: "2-digit",
     minute: "2-digit",
@@ -15,35 +19,65 @@ export function InboxHeader({
 
   return (
     <header
-      className="sticky top-0 z-10 px-6 py-4"
+      className="sticky top-0 z-10 px-6 pt-6 pb-4"
       style={{
         background: "var(--tt-bg)",
         borderBottom: "1px solid var(--tt-bg-elev)",
       }}
     >
-      <h1
-        className="tracking-tight"
+      <div className="flex items-baseline justify-between gap-4">
+        <div className="flex items-baseline gap-4">
+          <h1
+            className="display tracking-tight"
+            style={{
+              color: "var(--tt-ink)",
+              fontSize: 30,
+              lineHeight: 1,
+            }}
+          >
+            Inbox
+          </h1>
+          <span
+            className="mono uppercase"
+            style={{
+              color: "var(--tt-amber)",
+              fontSize: 11,
+              letterSpacing: "0.18em",
+            }}
+          >
+            · {day} {date}
+          </span>
+        </div>
+        <span
+          className="mono tabular-nums"
+          style={{
+            color: "var(--tt-ink-dim)",
+            fontSize: 12,
+            letterSpacing: "0.05em",
+          }}
+        >
+          {time}
+        </span>
+      </div>
+      <p
+        className="mono mt-2 flex items-center gap-2"
         style={{
-          color: "var(--tt-ink)",
-          fontFamily: "'Inter Tight', system-ui, sans-serif",
-          fontWeight: 700,
-          fontSize: 22,
+          color: "var(--tt-ink-dim)",
+          fontSize: 11,
+          letterSpacing: "0.08em",
+          textTransform: "uppercase",
         }}
       >
-        INBOX{" "}
         <span
-          className="font-mono"
-          style={{ color: "var(--tt-amber)", fontSize: 16 }}
-        >
-          · {day} {time}
-        </span>
-      </h1>
-      <p
-        className="font-mono mt-1"
-        style={{ color: "var(--tt-ink-dim)", fontSize: 11, letterSpacing: "0.05em" }}
-      >
-        <span style={{ color: "var(--tt-amber)" }}>{needEyesCount}</span> items need eyes ·{" "}
-        <span style={{ color: "var(--tt-ink)" }}>{doneTodayCount}</span> done today
+          className="inline-block w-1.5 h-1.5 rounded-full animate-pulse-dot"
+          style={{ background: "var(--tt-amber)" }}
+          aria-hidden
+        />
+        <span style={{ color: "var(--tt-amber)", fontWeight: 600 }}>{needEyesCount}</span>
+        items need eyes
+        <span className="opacity-50">·</span>
+        <span style={{ color: "var(--tt-ink)", fontWeight: 600 }}>{doneTodayCount}</span>
+        done today
       </p>
     </header>
   );