feat: improve frontend accessibility, modal stories and visual balance

frontend/src/app/page.tsx

@@ -141,7 +141,7 @@ export default function Home() {
 
 function SwapPreviewPanel() {
   return (
-    <Card variant="raised" className="overflow-hidden shadow-glow-sm">
+    <Card variant="raised" className="overflow-hidden">
       <div className="border-b border-border bg-surface-overlay/60 px-4 py-3 flex items-center justify-between">
         <div className="flex items-center gap-2">
           <ArrowRightLeft className="h-4 w-4 text-brand-500" />
@@ -156,8 +156,8 @@ function SwapPreviewPanel() {
           <p className="text-[10px] font-medium uppercase tracking-widest text-text-muted mb-2">From</p>
           <div className="flex items-center justify-between">
             <div className="flex items-center gap-2">
-              <div className="h-7 w-7 rounded-full bg-brand-500/20 flex items-center justify-center">
-                <span className="text-[10px] font-bold text-brand-500">XLM</span>
+              <div className="h-7 w-7 rounded-full bg-surface-raised flex items-center justify-center border border-border">
+                <span className="text-[10px] font-bold text-text-primary">XLM</span>
               </div>
               <div>
                 <p className="text-sm font-semibold text-text-primary">Stellar</p>
@@ -238,7 +238,7 @@ function FeatureCard({
   return (
     <Card
       variant="glass"
-      className="p-8 transition-all hover:border-brand-500/50 hover:shadow-glow-sm"
+      className="p-8 transition-all hover:bg-surface-overlay/50 hover:border-border/80"
     >
       <div className="mb-4 flex h-12 w-12 items-center justify-center rounded-2xl bg-surface-overlay border border-border">
         {icon}

frontend/src/components/marketplace/OrderListTable.tsx

@@ -240,10 +240,19 @@ export function OrderListTable({
                     <th
                       key={column.key}
                       onClick={() => (isSortable ? onSort(column.sortKey!) : undefined)}
+                      role={isSortable ? "button" : undefined}
+                      tabIndex={isSortable ? 0 : undefined}
+                      aria-sort={isActiveSort ? (sortDirection === "asc" ? "ascending" : "descending") : undefined}
+                      onKeyDown={(e) => {
+                        if (isSortable && (e.key === "Enter" || e.key === " ")) {
+                          e.preventDefault();
+                          onSort(column.sortKey!);
+                        }
+                      }}
                       className={cn(
-                        "text-xs font-bold uppercase tracking-wider text-text-muted",
+                        "text-xs font-bold uppercase tracking-wider text-text-muted select-none",
                         column.className,
-                        isSortable && "cursor-pointer hover:text-text-primary transition-colors"
+                        isSortable && "cursor-pointer hover:text-text-primary transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-brand-500 rounded"
                       )}
                     >
                       <div className="flex items-center gap-2">

frontend/src/components/swap/SwapModals.stories.tsx

@@ -0,0 +1,137 @@
+import type { Meta, StoryObj } from "@storybook/react";
+import { SwapReviewModal } from "./SwapReviewModal";
+import { SwapSigningModal } from "./SwapSigningModal";
+import { useState } from "react";
+import { TransactionLifecycle } from "@/types";
+
+const meta: Meta = {
+  title: "Swap/Modals",
+  parameters: {
+    layout: "centered",
+  },
+};
+
+export default meta;
+
+// Dummy Payload for the modals
+const mockSwapDetails = {
+  fromAsset: "XLM",
+  fromChain: "stellar",
+  fromAmount: "100.5",
+  toAsset: "BTC",
+  toChain: "bitcoin",
+  toAmount: "0.0021",
+  estimatedFees: "0.00001 XLM",
+  timelockHours: 24,
+  route: "Stellar → Bitcoin",
+  slippage: 0.5,
+  expirationMinutes: 30,
+};
+
+// ==========================================
+// Swap Review Modal Stories
+// ==========================================
+
+export const ReviewState: StoryObj<typeof SwapReviewModal> = {
+  render: () => {
+    return (
+      <SwapReviewModal
+        open={true}
+        onClose={() => {}}
+        onConfirm={() => {}}
+        isConfirming={false}
+        swapDetails={mockSwapDetails}
+      />
+    );
+  },
+};
+
+export const ReviewStateConfirming: StoryObj<typeof SwapReviewModal> = {
+  render: () => {
+    return (
+      <SwapReviewModal
+        open={true}
+        onClose={() => {}}
+        onConfirm={() => {}}
+        isConfirming={true}
+        swapDetails={mockSwapDetails}
+      />
+    );
+  },
+};
+
+// ==========================================
+// Swap Signing Modal Stories
+// ==========================================
+
+const mockLifecycleInProgress: TransactionLifecycle = {
+  currentStep: "sign",
+  retryable: false,
+  steps: [
+    { key: "init", status: "completed", label: "Initialize Swap", description: "Creating swap request" },
+    { key: "sign", status: "active", label: "Sign Transaction", description: "Waiting for wallet signature" },
+    { key: "submit", status: "idle", label: "Submit to Network", description: "Broadcasting to network" },
+  ],
+};
+
+const mockLifecycleFailed: TransactionLifecycle = {
+  currentStep: "sign",
+  retryable: true,
+  steps: [
+    { key: "init", status: "completed", label: "Initialize Swap", description: "Creating swap request" },
+    { key: "sign", status: "error", label: "Sign Transaction", description: "User rejected request", errorMessage: "User rejected request" },
+    { key: "submit", status: "idle", label: "Submit to Network", description: "Broadcasting to network" },
+  ],
+};
+
+const mockLifecycleCompleted: TransactionLifecycle = {
+  currentStep: "submit",
+  retryable: false,
+  steps: [
+    { key: "init", status: "completed", label: "Initialize Swap", description: "Creating swap request" },
+    { key: "sign", status: "completed", label: "Sign Transaction", description: "Waiting for wallet signature" },
+    { key: "submit", status: "completed", label: "Submit to Network", description: "Broadcasting to network" },
+  ],
+};
+
+export const SigningInProgress: StoryObj<typeof SwapSigningModal> = {
+  render: () => {
+    return (
+      <SwapSigningModal
+        open={true}
+        onClose={() => {}}
+        onCancel={() => {}}
+        onRetry={() => {}}
+        lifecycle={mockLifecycleInProgress}
+      />
+    );
+  },
+};
+
+export const SigningFailed: StoryObj<typeof SwapSigningModal> = {
+  render: () => {
+    return (
+      <SwapSigningModal
+        open={true}
+        onClose={() => {}}
+        onCancel={() => {}}
+        onRetry={() => {}}
+        lifecycle={mockLifecycleFailed}
+      />
+    );
+  },
+};
+
+export const SigningComplete: StoryObj<typeof SwapSigningModal> = {
+  render: () => {
+    return (
+      <SwapSigningModal
+        open={true}
+        onClose={() => {}}
+        onCancel={() => {}}
+        onRetry={() => {}}
+        lifecycle={mockLifecycleCompleted}
+      />
+    );
+  },
+};

frontend/src/components/transactions/TransactionDetailModal.tsx

@@ -202,11 +202,11 @@ export function TransactionDetailModal({ tx, onClose, onRetry }: TransactionDeta
               View on Explorer <ExternalLink className="h-4 w-4" />
             </Button>
           </a>
-          <Button variant="secondary" size="icon" className="rounded-xl h-11 w-11 shadow-sm">
-            <Download className="h-5 w-5" />
+          <Button variant="secondary" size="icon" className="rounded-xl h-11 w-11 shadow-sm" aria-label="Download receipt">
+            <Download className="h-5 w-5" aria-hidden="true" />
           </Button>
-          <Button variant="secondary" size="icon" className="rounded-xl h-11 w-11 shadow-sm">
-            <Share2 className="h-5 w-5" />
+          <Button variant="secondary" size="icon" className="rounded-xl h-11 w-11 shadow-sm" aria-label="Share transaction">
+            <Share2 className="h-5 w-5" aria-hidden="true" />
           </Button>
         </div>
       </Card>

frontend/src/components/ui/button.tsx

@@ -85,9 +85,9 @@ export const Button = forwardRef<HTMLButtonElement, ButtonProps>(
         {...props}
       >
         {loading ? (
-          <Loader2 className="h-4 w-4 animate-spin shrink-0" />
+          <Loader2 className="h-4 w-4 animate-spin shrink-0" aria-hidden="true" />
         ) : (
-          icon && <span className="shrink-0">{icon}</span>
+          icon && <span className="shrink-0" aria-hidden="true">{icon}</span>
         )}
         {children}
       </button>