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.

tailwind.config.js

@@ -13,24 +13,29 @@ export default {
     extend: {
       fontFamily: {
         sans: [
-          "Cabinet Grotesk",
+          "Geist",
+          "ui-sans-serif",
           "-apple-system",
           "BlinkMacSystemFont",
-          "SF Pro Text",
-          "Segoe UI",
           "system-ui",
-          "Roboto",
           "sans-serif",
         ],
         mono: [
           "Geist Mono",
-          "SF Mono",
           "ui-monospace",
+          "SF Mono",
           "Menlo",
           "Monaco",
           "Consolas",
           "monospace",
         ],
+        display: [
+          "Instrument Serif",
+          "Iowan Old Style",
+          "Apple Garamond",
+          "Baskerville",
+          "serif",
+        ],
       },
       colors: {
         border: "hsl(var(--border))",
@@ -66,6 +71,10 @@ export default {
           DEFAULT: "hsl(var(--accent))",
           foreground: "hsl(var(--accent-foreground))",
         },
+        signal: {
+          DEFAULT: "hsl(var(--signal))",
+          foreground: "hsl(var(--warning-foreground))",
+        },
         popover: {
           DEFAULT: "hsl(var(--popover))",
           foreground: "hsl(var(--popover-foreground))",
@@ -83,8 +92,8 @@ export default {
       },
       borderRadius: {
         lg: "var(--radius)",
-        md: "calc(var(--radius) - 4px)",
-        sm: "calc(var(--radius) - 6px)",
+        md: "calc(var(--radius) - 2px)",
+        sm: "calc(var(--radius) - 4px)",
         xl: "calc(var(--radius) + 4px)",
       },
       keyframes: {
@@ -104,6 +113,14 @@ export default {
           from: { opacity: "0" },
           to: { opacity: "1" },
         },
+        "fade-in-up": {
+          from: { opacity: "0", transform: "translateY(12px)" },
+          to: { opacity: "1", transform: "translateY(0)" },
+        },
+        "slide-in-right": {
+          from: { opacity: "0", transform: "translateX(16px)" },
+          to: { opacity: "1", transform: "translateX(0)" },
+        },
         shimmer: {
           "0%": { transform: "translateX(-100%)" },
           "100%": { transform: "translateX(100%)" },
@@ -117,15 +134,27 @@ export default {
           "0%": { backgroundColor: "hsl(var(--accent) / 0.10)" },
           "100%": { backgroundColor: "transparent" },
         },
+        "pulse-dot": {
+          "0%, 100%": { opacity: "1" },
+          "50%": { opacity: "0.4" },
+        },
+        "ticker-blink": {
+          "0%, 60%": { opacity: "1" },
+          "61%, 100%": { opacity: "0.3" },
+        },
       },
       animation: {
         "accordion-down": "accordion-down 0.2s ease-out",
         "accordion-up": "accordion-up 0.2s ease-out",
         "fade-in": "fade-in 0.4s cubic-bezier(0.2, 0.8, 0.2, 1) both",
         "fade-in-soft": "fade-in-soft 0.6s ease-out both",
+        "fade-in-up": "fade-in-up 0.5s cubic-bezier(0.2, 0.8, 0.2, 1) both",
+        "slide-in-right": "slide-in-right 0.35s cubic-bezier(0.2, 0.8, 0.2, 1) both",
         shimmer: "shimmer 2.4s linear infinite",
         scan: "scan 1.6s ease-in-out infinite",
         "row-flash": "row-flash 1.2s ease-out",
+        "pulse-dot": "pulse-dot 1.8s ease-in-out infinite",
+        "ticker-blink": "ticker-blink 2s ease-in-out infinite",
       },
     },
   },