a11y(wallet): give icon-only buttons an accessible name

frontend/wallet/app/InstallBanner.tsx

@@ -103,6 +103,7 @@ export function InstallBanner() {
         </div>
         <button 
           onClick={handleDismiss} 
+          aria-label="Dismiss install prompt"
           style={{ background: 'none', border: 'none', color: 'var(--warm-grey)', cursor: 'pointer', padding: '4px' }}
         >
           <X size={20} strokeWidth={1.5} />

frontend/wallet/app/agent/page.tsx

@@ -390,6 +390,7 @@ export default function AgentPage() {
         <header className="wallet-nav">
           <button
             onClick={() => router.back()}
+            aria-label="Back"
             style={{ background: 'none', border: 'none', cursor: 'pointer', padding: '0.25rem', color: 'var(--warm-grey)', display: 'flex' }}
           >
             <svg width="20" height="20" viewBox="0 0 24 24" fill="none">
@@ -579,6 +580,7 @@ export default function AgentPage() {
         <button
           onClick={clearHistory}
           className="agent-header__action"
+          aria-label="Clear history"
           title="Clear history"
         >
           <svg width="16" height="16" viewBox="0 0 24 24" fill="none">

frontend/wallet/app/contacts/page.tsx

@@ -139,6 +139,7 @@ export default function ContactsPage() {
                 <button
                   onClick={() => removeContact(contact.id)}
                   style={{ background: 'none', border: 'none', cursor: 'pointer', color: 'rgba(246,247,248,0.3)', padding: '0.5rem' }}
+                  aria-label="Delete contact"
                   title="Delete contact"
                 >
                   <svg width="20" height="20" viewBox="0 0 24 24" fill="none">

frontend/wallet/app/dashboard/page.tsx

@@ -655,6 +655,7 @@ function DashboardPageContent() {
             }}
             className='settings-button'
             style={{ color: "var(--color-muted)"}}
+            aria-label={`Copy wallet address ${walletAddress.slice(0, 6)}…${walletAddress.slice(-6)}`}
             title="Copy wallet address"
           >
             <span className="address-chip">
@@ -791,6 +792,7 @@ function DashboardPageContent() {
                 id="dashboard-prf-downgrade-dismiss"
                 onClick={() => setPrfDowngradeDismissed(true)}
                 style={{ background: 'none', border: 'none', cursor: 'pointer', color: 'var(--color-muted)', fontSize: '1rem', lineHeight: 1, padding: '0 0 0 0.5rem' }}
+                aria-label="Dismiss fee-payer warning"
                 title="Dismiss"
               >
                 ×
@@ -826,6 +828,7 @@ function DashboardPageContent() {
               <button
                 onClick={() => setSweepDismissed(true)}
                 style={{ background: 'none', border: 'none', cursor: 'pointer', color: 'var(--color-muted)', fontSize: '1rem', lineHeight: 1, padding: '0 0 0 0.5rem' }}
+                aria-label="Dismiss stranded balance notice"
                 title="Dismiss"
               >
                 ×

frontend/wallet/app/multisig/components/Wizard.tsx

@@ -120,6 +120,7 @@ export default function Wizard({ onDeploySuccess }: WizardProps) {
                   justifyContent: "center",
                   fontSize: "1.125rem"
                 }}
+                aria-label="Remove signer"
                 title="Remove signer"
               >
                 ×

frontend/wallet/app/nfts/page.tsx

@@ -226,6 +226,7 @@ export default function NFTGalleryPage() {
                 color: 'var(--off-white)',
                 cursor: 'pointer',
               }}
+              aria-label="Refresh NFTs"
               title="Refresh NFTs"
             >
               <svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round" style={{ animation: loading ? 'spin 1s linear infinite' : 'none' }}>
@@ -606,6 +607,7 @@ export default function NFTGalleryPage() {
                   setSelectedNFT(null)
                   setShowRawJson(false)
                 }}
+                aria-label="Close NFT details"
                 style={{ background: 'var(--surface-md)', border: 'none', color: 'var(--off-white)', width: '32px', height: '32px', borderRadius: '50%', cursor: 'pointer', fontSize: '1.25rem', display: 'flex', alignItems: 'center', justifyContent: 'center' }}
               >
                 ✕

frontend/wallet/app/settings/agent/page.tsx

@@ -45,6 +45,7 @@ export default function AgentSettingsPage() {
       <header className="wallet-nav">
         <button
           onClick={() => router.back()}
+          aria-label="Back to settings"
           style={{ background: 'none', border: 'none', cursor: 'pointer', padding: '0.25rem', color: 'var(--warm-grey)', display: 'flex' }}
         >
           <svg width="20" height="20" viewBox="0 0 24 24" fill="none">
@@ -77,6 +78,10 @@ export default function AgentSettingsPage() {
             </div>
             <button
               onClick={() => setAgentEnabled(!agentEnabled)}
+              type="button"
+              role="switch"
+              aria-checked={agentEnabled}
+              aria-label="Veil Agent"
               style={{
                 position: 'relative', width: '44px', height: '24px', borderRadius: '100px',
                 background: agentEnabled ? 'var(--gold)' : 'var(--surface-md)',

frontend/wallet/app/settings/profile/page.tsx

@@ -87,6 +87,7 @@ export default function ProfileSettingsPage() {
       <header className="wallet-nav">
         <button
           onClick={() => router.back()}
+          aria-label="Back to settings"
           style={{ background: 'none', border: 'none', cursor: 'pointer', padding: '0.25rem', color: 'var(--warm-grey)', display: 'flex' }}
         >
           <svg width="20" height="20" viewBox="0 0 24 24" fill="none">

frontend/wallet/app/token/[code]/page.tsx

@@ -228,6 +228,7 @@ export default function TokenPage() {
       {/* Nav */}
       <nav className="wallet-nav">
         <button onClick={() => router.back()}
+          aria-label="Back"
           style={{ background: 'none', border: 'none', cursor: 'pointer', color: 'var(--warm-grey)', display: 'flex', padding: '0.25rem' }}>
           <svg width="20" height="20" viewBox="0 0 24 24" fill="none">
             <path d="M19 12H5M12 19l-7-7 7-7" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round"/>

frontend/wallet/components/ContactPicker.tsx

@@ -47,6 +47,7 @@ export function ContactPicker({ onSelect, onClose }: ContactPickerProps) {
             </h3>
             <button
               onClick={onClose}
+              aria-label="Close contact picker"
               style={{ background: 'none', border: 'none', cursor: 'pointer', color: 'rgba(246,247,248,0.4)', padding: '0.5rem' }}
             >
               <svg width="24" height="24" viewBox="0 0 24 24" fill="none">