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/SearchBar.tsx

@@ -74,12 +74,12 @@ function SearchTrigger({ onOpen }: { onOpen: () => void }) {
       aria-label="Open global search (Cmd or Ctrl + K)"
       className={cn(
         "group inline-flex items-center gap-2.5 h-8 pl-2.5 pr-2 rounded-md",
-        "border border-border/60 bg-background/40 hover:bg-background/70",
+        "border border-border/60 bg-background/40 hover:bg-background/70 hover:border-border/80",
         "text-[12px] text-muted-foreground hover:text-foreground",
-        "transition-colors focus:outline-none focus-visible:ring-2 focus-visible:ring-ring focus-visible:ring-offset-2 focus-visible:ring-offset-background"
+        "transition-all focus:outline-none focus-visible:ring-2 focus-visible:ring-ring focus-visible:ring-offset-2 focus-visible:ring-offset-background"
       )}
     >
-      <Search className="h-3.5 w-3.5" strokeWidth={1.75} aria-hidden />
+      <Search className="h-3.5 w-3.5 text-muted-foreground group-hover:text-foreground transition-colors" strokeWidth={1.75} aria-hidden />
       <span className="font-medium tracking-tight">Search</span>
       <span className="ml-2 inline-flex items-center gap-0.5">
         <kbd className="kbd">{MOD_LABEL}</kbd>
@@ -217,7 +217,7 @@ export function SearchBar() {
           className={cn(
             "max-w-2xl p-0 gap-0 overflow-hidden",
             "bg-[color:var(--m-surface)] text-[color:var(--m-ink-primary)]",
-            "border border-[color:var(--m-border-heavy)]/20"
+            "border border-[color:var(--m-border-heavy)]/30 shadow-2xl"
           )}
           aria-describedby={undefined}
           data-testid="search-dialog"
@@ -228,9 +228,9 @@ export function SearchBar() {
            * tabbable element on open). `pl-9` makes room for the
            * magnifier icon on the left.
            */}
-          <div className="relative border-b border-border/40">
+          <div className="relative border-b border-[color:var(--m-border-heavy)]/20">
             <Search
-              className="absolute left-3 top-1/2 -translate-y-1/2 h-4 w-4 text-muted-foreground pointer-events-none"
+              className="absolute left-3.5 top-1/2 -translate-y-1/2 h-4 w-4 text-[color:var(--m-ink-tertiary)] pointer-events-none"
               strokeWidth={1.75}
               aria-hidden
             />
@@ -249,9 +249,10 @@ export function SearchBar() {
               onKeyDown={onInputKeyDown}
               data-testid="search-input"
               className={cn(
-                "h-12 pl-9 pr-3 border-0 bg-transparent rounded-none",
-                "text-[14px] font-mono tracking-tight",
-                "shadow-none focus-visible:ring-0 focus-visible:ring-offset-0"
+                "h-12 pl-10 pr-3 border-0 bg-transparent rounded-none",
+                "text-[14px] mono tracking-tight",
+                "shadow-none focus-visible:ring-0 focus-visible:ring-offset-0 focus-visible:bg-transparent",
+                "text-[color:var(--m-ink-primary)] placeholder:text-[color:var(--m-ink-tertiary)]"
               )}
             />
           </div>
@@ -270,7 +271,7 @@ export function SearchBar() {
           </div>
 
           {/* Footer hint — shows the keyboard contract. */}
-          <div className="flex items-center justify-between gap-3 px-3 py-2 border-t border-border/40 text-[10.5px] font-mono uppercase tracking-[0.12em] text-muted-foreground">
+          <div className="flex items-center justify-between gap-3 px-4 py-2.5 border-t border-[color:var(--m-border-heavy)]/20 bg-[color:var(--m-surface)]/80 text-[10px] mono uppercase tracking-[0.14em] text-[color:var(--m-ink-tertiary)]">
             <div className="flex items-center gap-3">
               <span className="inline-flex items-center gap-1">
                 <kbd className="kbd">↑</kbd>
@@ -287,9 +288,16 @@ export function SearchBar() {
               </span>
             </div>
             {isLoading ? (
-              <span className="text-muted-foreground/70">loading…</span>
+              <span className="inline-flex items-center gap-1.5">
+                <span
+                  aria-hidden
+                  className="inline-block h-1.5 w-1.5 rounded-full animate-pulse-dot"
+                  style={{ background: "var(--tt-amber, hsl(var(--accent)))" }}
+                />
+                loading…
+              </span>
             ) : (
-              <span className="text-muted-foreground/70">
+              <span className="tabular-nums">
                 {flatTotal} {flatTotal === 1 ? "result" : "results"}
               </span>
             )}