diff --git a/app/src/components/ui/Badge.tsx b/app/src/components/ui/Badge.tsx
new file mode 100644
index 0000000..1709d1c
--- /dev/null
+++ b/app/src/components/ui/Badge.tsx
@@ -0,0 +1,34 @@
+import type { ReactNode } from 'react'
+
+interface BadgeProps {
+  children: ReactNode
+  color: string
+  bg: string
+}
+
+export function Badge({ children, color, bg }: BadgeProps) {
+  return (
+    <span
+      style={{
+        display: 'inline-block',
+        padding: '4px 10px',
+        borderRadius: 999,
+        fontSize: 11,
+        fontWeight: 600,
+        color,
+        background: bg,
+      }}
+    >
+      {children}
+    </span>
+  )
+}
+
+export const STATUS_COLORS = {
+  active: { color: '#14F195', bg: 'rgba(20,241,149,.15)' },
+  inactive: { color: '#8A8FA3', bg: 'rgba(138,143,163,.16)' },
+  awaitingConfirm: { color: '#F5B23E', bg: 'rgba(245,178,62,.15)' },
+  disputed: { color: '#FF7A59', bg: 'rgba(255,122,89,.15)' },
+  complete: { color: '#4FD1E0', bg: 'rgba(79,209,224,.15)' },
+  cancelled: { color: '#8A8FA3', bg: 'rgba(138,143,163,.16)' },
+}
diff --git a/app/src/components/ui/Button.tsx b/app/src/components/ui/Button.tsx
new file mode 100644
index 0000000..74bbc6e
--- /dev/null
+++ b/app/src/components/ui/Button.tsx
@@ -0,0 +1,52 @@
+import type { CSSProperties, ReactNode, ButtonHTMLAttributes } from 'react'
+
+export type ButtonVariant = 'primary' | 'outline' | 'danger' | 'ghost'
+
+interface ButtonProps extends ButtonHTMLAttributes<HTMLButtonElement> {
+  variant?: ButtonVariant
+  children: ReactNode
+}
+
+const variantStyles: Record<ButtonVariant, CSSProperties> = {
+  primary: {
+    background: 'linear-gradient(135deg, var(--acc), var(--acc2))',
+    color: '#0b0613',
+    border: 'none',
+  },
+  outline: {
+    background: 'transparent',
+    border: '1px solid var(--bd)',
+    color: 'var(--tx)',
+  },
+  danger: {
+    background: 'transparent',
+    border: '1px solid var(--danger)',
+    color: 'var(--danger)',
+  },
+  ghost: {
+    background: 'var(--bg3)',
+    border: '1px solid var(--bd)',
+    color: 'var(--tx)',
+  },
+}
+
+export function Button({ variant = 'primary', children, style, disabled, ...rest }: ButtonProps) {
+  return (
+    <button
+      {...rest}
+      disabled={disabled}
+      style={{
+        padding: '11px 18px',
+        borderRadius: 'var(--radius)',
+        fontWeight: 700,
+        fontSize: 13,
+        cursor: disabled ? 'not-allowed' : 'pointer',
+        opacity: disabled ? 0.5 : 1,
+        ...variantStyles[variant],
+        ...style,
+      }}
+    >
+      {children}
+    </button>
+  )
+}
diff --git a/app/src/components/ui/FieldRow.tsx b/app/src/components/ui/FieldRow.tsx
new file mode 100644
index 0000000..1cfe115
--- /dev/null
+++ b/app/src/components/ui/FieldRow.tsx
@@ -0,0 +1,75 @@
+import type { ReactNode } from 'react'
+
+interface FieldRowProps {
+  label: string
+  children: ReactNode
+  last?: boolean
+}
+
+export function FieldRow({ label, children, last }: FieldRowProps) {
+  return (
+    <div
+      style={{
+        display: 'flex',
+        justifyContent: 'space-between',
+        gap: 18,
+        padding: '11px 0',
+        borderBottom: last ? 'none' : '1px solid var(--bdSoft)',
+        alignItems: 'flex-start',
+      }}
+    >
+      <div style={{ fontSize: 12.5, color: 'var(--mut)', fontWeight: 500, flexShrink: 0, paddingTop: 2 }}>
+        {label}
+      </div>
+      <div style={{ textAlign: 'right', minWidth: 0 }}>{children}</div>
+    </div>
+  )
+}
+
+export function MonoChip({
+  value,
+  onCopy,
+  onClick,
+  sub,
+}: {
+  value: string
+  onCopy?: () => void
+  onClick?: () => void
+  sub?: string
+}) {
+  function copy() {
+    navigator.clipboard.writeText(value)
+    onCopy?.()
+  }
+  return (
+    <div>
+      <div style={{ display: 'flex', alignItems: 'center', gap: 7, justifyContent: 'flex-end' }}>
+        <span
+          onClick={onClick}
+          style={{
+            fontFamily: 'var(--font-mono)',
+            fontSize: 12.5,
+            color: onClick ? 'var(--acc2light)' : 'var(--tx)',
+            cursor: onClick ? 'pointer' : 'default',
+          }}
+        >
+          {value}
+        </span>
+        <button
+          onClick={copy}
+          style={{
+            fontSize: 9.5,
+            color: 'var(--mut)',
+            padding: '3px 6px',
+            borderRadius: 5,
+            background: 'var(--bg3)',
+            fontWeight: 600,
+          }}
+        >
+          COPY
+        </button>
+      </div>
+      {sub && <div style={{ fontSize: 11.5, color: 'var(--mut)', marginTop: 3 }}>{sub}</div>}
+    </div>
+  )
+}
diff --git a/app/src/components/ui/Toast.tsx b/app/src/components/ui/Toast.tsx
new file mode 100644
index 0000000..2240277
--- /dev/null
+++ b/app/src/components/ui/Toast.tsx
@@ -0,0 +1,59 @@
+'use client'
+
+import { createContext, useCallback, useContext, useState, type ReactNode } from 'react'
+
+const ToastCtx = createContext<(msg: string) => void>(() => {})
+
+export function useToast() {
+  return useContext(ToastCtx)
+}
+
+export function ToastProvider({ children }: { children: ReactNode }) {
+  const [msg, setMsg] = useState('')
+
+  const show = useCallback((m: string) => {
+    setMsg(m)
+    setTimeout(() => setMsg(''), 2800)
+  }, [])
+
+  return (
+    <ToastCtx.Provider value={show}>
+      {children}
+      {msg && (
+        <div
+          style={{
+            position: 'fixed',
+            left: '50%',
+            bottom: 30,
+            transform: 'translateX(-50%)',
+            zIndex: 90,
+            display: 'flex',
+            alignItems: 'center',
+            gap: 10,
+            padding: '12px 18px',
+            background: 'var(--bg2)',
+            border: '1px solid var(--accBd)',
+            borderRadius: 12,
+            boxShadow: '0 16px 40px rgba(0,0,0,.55)',
+            fontSize: 13,
+            fontWeight: 500,
+            animation: 'scToast .22s ease',
+            whiteSpace: 'nowrap',
+          }}
+        >
+          <span
+            style={{
+              width: 8,
+              height: 8,
+              borderRadius: '50%',
+              background: 'var(--acc2)',
+              boxShadow: '0 0 8px var(--acc2)',
+              flexShrink: 0,
+            }}
+          />
+          {msg}
+        </div>
+      )}
+    </ToastCtx.Provider>
+  )
+}