UI/UX redesign: unified refined-glass design system

- Add shared UI primitives: Button, Field/Input/Select, PageHeader,
  Section, Callout, Tabs, Disclosure
- Replace gradient buttons with single blue-accent btn-primary
- Reserve gradient text for the brand wordmark only
- Rework Scanner page onto the glass system; collapse explainer and
  glossary into a disclosure, move filters into a glass toolbar
- Restructure Ticker Detail into tabs (Analysis / Indicators / S/R)
  with chart and recommendation always visible
- Align Watchlist, Rankings, Admin, Login/Register to shared primitives
- Unify stray indigo/violet/gray accents into the blue family

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

frontend/src/components/ui/Badge.tsx

@@ -1,6 +1,6 @@
 const variantStyles: Record<string, string> = {
   auto: 'bg-blue-500/15 text-blue-400 border-blue-500/20',
-  manual: 'bg-violet-500/15 text-violet-400 border-violet-500/20',
+  manual: 'bg-sky-500/15 text-sky-400 border-sky-500/20',
   default: 'bg-white/[0.06] text-gray-400 border-white/[0.08]',
 };
 

frontend/src/components/ui/Button.tsx

@@ -0,0 +1,54 @@
+import type { ButtonHTMLAttributes, ReactNode } from 'react';
+
+type Variant = 'primary' | 'ghost' | 'danger';
+type Size = 'sm' | 'md';
+
+const variantClasses: Record<Variant, string> = {
+  primary: 'btn-primary',
+  ghost:
+    'border border-white/[0.08] bg-white/[0.03] text-gray-300 hover:bg-white/[0.07] hover:text-gray-100 rounded-lg',
+  danger:
+    'border border-red-500/30 bg-red-500/10 text-red-400 hover:bg-red-500/20 rounded-lg',
+};
+
+const sizeClasses: Record<Size, string> = {
+  sm: 'px-3 py-1.5 text-xs',
+  md: 'px-4 py-2 text-sm',
+};
+
+export function Spinner({ className = 'h-4 w-4' }: { className?: string }) {
+  return (
+    <svg className={`animate-spin ${className}`} viewBox="0 0 24 24" fill="none" aria-hidden="true">
+      <circle className="opacity-25" cx="12" cy="12" r="10" stroke="currentColor" strokeWidth="4" />
+      <path className="opacity-75" fill="currentColor" d="M4 12a8 8 0 018-8V0C5.373 0 0 5.373 0 12h4z" />
+    </svg>
+  );
+}
+
+interface ButtonProps extends ButtonHTMLAttributes<HTMLButtonElement> {
+  variant?: Variant;
+  size?: Size;
+  loading?: boolean;
+  children: ReactNode;
+}
+
+export function Button({
+  variant = 'primary',
+  size = 'md',
+  loading = false,
+  disabled,
+  className = '',
+  children,
+  ...rest
+}: ButtonProps) {
+  return (
+    <button
+      disabled={disabled || loading}
+      className={`inline-flex items-center justify-center gap-2 font-medium transition-all duration-200 disabled:opacity-50 disabled:cursor-not-allowed ${variantClasses[variant]} ${sizeClasses[size]} ${className}`}
+      {...rest}
+    >
+      {loading && <Spinner />}
+      {children}
+    </button>
+  );
+}

frontend/src/components/ui/Callout.tsx

@@ -0,0 +1,33 @@
+import type { ReactNode } from 'react';
+
+type Variant = 'info' | 'warning' | 'error' | 'empty';
+
+const variantClasses: Record<Variant, string> = {
+  info: 'border-blue-500/20 bg-blue-500/10 text-blue-300',
+  warning: 'border-amber-500/20 bg-amber-500/10 text-amber-300',
+  error: 'border-red-500/20 bg-red-500/10 text-red-400',
+  empty: 'border-white/[0.06] bg-white/[0.02] text-gray-400 py-8 text-center',
+};
+
+interface CalloutProps {
+  variant?: Variant;
+  children: ReactNode;
+  onRetry?: () => void;
+}
+
+/** Standard inline message box for info banners, errors, and empty states. */
+export function Callout({ variant = 'info', children, onRetry }: CalloutProps) {
+  return (
+    <div className={`rounded-xl border px-4 py-3 text-sm ${variantClasses[variant]}`}>
+      {children}
+      {onRetry && (
+        <button
+          onClick={onRetry}
+          className="mt-2 block text-xs font-medium underline opacity-80 hover:opacity-100"
+        >
+          Retry
+        </button>
+      )}
+    </div>
+  );
+}

frontend/src/components/ui/Disclosure.tsx

@@ -0,0 +1,19 @@
+import type { ReactNode } from 'react';
+
+interface DisclosureProps {
+  summary: string;
+  children: ReactNode;
+}
+
+/** Collapsible help/explainer block — keeps secondary content out of the way. */
+export function Disclosure({ summary, children }: DisclosureProps) {
+  return (
+    <details className="glass-sm group">
+      <summary className="flex cursor-pointer select-none items-center gap-2 px-4 py-2.5 text-xs font-medium text-gray-400 transition-colors hover:text-gray-200 [&::-webkit-details-marker]:hidden">
+        <span className="inline-block transition-transform duration-200 group-open:rotate-90">▸</span>
+        {summary}
+      </summary>
+      <div className="px-4 pb-4 pt-1 text-sm text-gray-300">{children}</div>
+    </details>
+  );
+}

frontend/src/components/ui/Field.tsx

@@ -0,0 +1,31 @@
+import type { InputHTMLAttributes, ReactNode, SelectHTMLAttributes } from 'react';
+
+interface FieldProps {
+  label: string;
+  htmlFor?: string;
+  children: ReactNode;
+}
+
+/** Labeled form control wrapper for filter bars and forms. */
+export function Field({ label, htmlFor, children }: FieldProps) {
+  return (
+    <div>
+      <label htmlFor={htmlFor} className="mb-1 block text-xs text-gray-400">
+        {label}
+      </label>
+      {children}
+    </div>
+  );
+}
+
+export function Input({ className = '', ...rest }: InputHTMLAttributes<HTMLInputElement>) {
+  return <input className={`input-glass px-3 py-1.5 text-sm ${className}`} {...rest} />;
+}
+
+export function Select({ className = '', children, ...rest }: SelectHTMLAttributes<HTMLSelectElement>) {
+  return (
+    <select className={`input-glass px-3 py-1.5 text-sm [&>option]:bg-[#0d1322] ${className}`} {...rest}>
+      {children}
+    </select>
+  );
+}

frontend/src/components/ui/PageHeader.tsx

@@ -0,0 +1,20 @@
+import type { ReactNode } from 'react';
+
+interface PageHeaderProps {
+  title: string;
+  subtitle?: string;
+  actions?: ReactNode;
+}
+
+/** Standard page heading: plain title, muted subtitle, actions on the right. */
+export function PageHeader({ title, subtitle, actions }: PageHeaderProps) {
+  return (
+    <div className="flex flex-wrap items-center justify-between gap-4">
+      <div>
+        <h1 className="text-2xl font-semibold text-gray-100">{title}</h1>
+        {subtitle && <p className="mt-1 text-xs text-gray-500">{subtitle}</p>}
+      </div>
+      {actions && <div className="flex items-center gap-2">{actions}</div>}
+    </div>
+  );
+}

frontend/src/components/ui/Section.tsx

@@ -0,0 +1,20 @@
+import type { ReactNode } from 'react';
+
+interface SectionProps {
+  title: string;
+  hint?: string;
+  children: ReactNode;
+}
+
+/** Content section with the standard uppercase tracking label. */
+export function Section({ title, hint, children }: SectionProps) {
+  return (
+    <section>
+      <h2 className="mb-3 text-xs font-medium uppercase tracking-widest text-gray-500">
+        {title}
+        {hint && <span className="ml-2 normal-case tracking-normal text-gray-600">{hint}</span>}
+      </h2>
+      {children}
+    </section>
+  );
+}

frontend/src/components/ui/Tabs.tsx

@@ -0,0 +1,28 @@
+interface TabsProps<T extends string> {
+  tabs: readonly T[];
+  active: T;
+  onChange: (tab: T) => void;
+}
+
+/** Glass pill tab bar. */
+export function Tabs<T extends string>({ tabs, active, onChange }: TabsProps<T>) {
+  return (
+    <div className="glass-sm flex w-fit gap-1 p-1" role="tablist">
+      {tabs.map((tab) => (
+        <button
+          key={tab}
+          role="tab"
+          aria-selected={active === tab}
+          onClick={() => onChange(tab)}
+          className={`rounded-lg px-4 py-2 text-sm font-medium transition-all duration-200 ${
+            active === tab
+              ? 'bg-white/[0.1] text-white shadow-lg shadow-blue-500/10'
+              : 'text-gray-400 hover:bg-white/[0.04] hover:text-gray-200'
+          }`}
+        >
+          {tab}
+        </button>
+      ))}
+    </div>
+  );
+}