refactor(ui): polish alert feed surface

web/src/components/AlertFeed.css

@@ -1,17 +1,43 @@
 .alert-feed {
-    background: linear-gradient(135deg, var(--card) 0%, var(--card-elevated) 100%);
-    border-radius: 16px;
-    padding: 24px;
-    box-shadow: var(--card-shadow);
     border: 1px solid var(--border);
+    border-radius: 18px;
+    background: var(--card);
+    padding: 22px;
+    box-shadow: var(--card-shadow);
+}
+
+.alert-feed-header {
+    display: flex;
+    align-items: flex-start;
+    gap: 12px;
+    margin-bottom: 20px;
+}
+
+.alert-feed-title-icon {
+    display: grid;
+    width: 34px;
+    height: 34px;
+    flex: 0 0 auto;
+    place-items: center;
+    border: 1px solid color-mix(in oklab, var(--accent) 24%, var(--border));
+    border-radius: 12px;
+    background: var(--accent-soft);
+    color: var(--accent);
 }
 
 .alert-feed h2 {
+    margin: 0;
     color: var(--foreground);
-    font-size: 20px;
+    font-size: 18px;
-    font-weight: 700;
+    font-weight: 820;
-    margin: 0 0 20px 0;
+    letter-spacing: 0;
-    letter-spacing: 0.5px;
+}
+
+.alert-feed-header p {
+    margin: 4px 0 0;
+    color: var(--muted-foreground);
+    font-size: 13px;
+    line-height: 1.5;
 }
 
 .alerts-container {
@@ -63,15 +89,16 @@
 }
 
 .alert-item {
-    display: flex;
+    display: grid;
+    grid-template-columns: auto minmax(0, 1fr);
     gap: 12px;
-    padding: 16px;
     margin-bottom: 12px;
+    padding: 16px;
     border-radius: 12px;
-    background: color-mix(in oklab, var(--foreground) 3%, transparent);
     border: 1px solid var(--border);
-    transition: all 0.2s;
+    background: color-mix(in oklab, var(--muted) 42%, var(--card));
     animation: slideIn 0.3s ease;
+    transition: background 0.16s ease, border-color 0.16s ease, transform 0.16s ease;
 }
 
 @keyframes slideIn {
@@ -87,8 +114,9 @@
 }
 
 .alert-item:hover {
-    background: var(--muted);
+    border-color: var(--border-strong);
-    transform: translateX(4px);
+    background: color-mix(in oklab, var(--accent-soft) 34%, var(--card));
+    transform: translateY(-1px);
 }
 
 .alert-signal {
@@ -108,27 +136,40 @@
 }
 
 .alert-icon {
-    font-size: 24px;
+    display: grid;
-    flex-shrink: 0;
+    width: 34px;
+    height: 34px;
+    flex: 0 0 auto;
+    place-items: center;
+    border-radius: 12px;
+    background: var(--muted);
+    color: var(--muted-foreground);
 }
 
 .alert-content {
-    flex: 1;
+    min-width: 0;
 }
 
 .alert-header {
     display: flex;
+    align-items: center;
     justify-content: space-between;
+    gap: 12px;
     margin-bottom: 6px;
 }
 
 .alert-symbol {
+    min-width: 0;
+    overflow: hidden;
     color: var(--foreground);
     font-weight: 700;
     font-size: 14px;
+    text-overflow: ellipsis;
+    white-space: nowrap;
 }
 
 .alert-time {
+    flex: 0 0 auto;
     color: var(--muted-foreground);
     font-size: 12px;
 }
@@ -137,4 +178,20 @@
     color: var(--muted-foreground);
     font-size: 13px;
     line-height: 1.5;
+    overflow-wrap: anywhere;
+}
+
+.alert-signal .alert-icon {
+    background: var(--bl-success-muted);
+    color: var(--bl-success);
+}
+
+.alert-pulse .alert-icon {
+    background: var(--bl-info-muted);
+    color: var(--bl-info);
+}
+
+.alert-error .alert-icon {
+    background: var(--bl-danger-muted);
+    color: var(--bl-danger);
 }

web/src/components/AlertFeed.dom.test.tsx

@@ -18,7 +18,7 @@ describe('AlertFeed DOM behavior', () => {
         expect(screen.getByText('Recent Activity')).toBeInTheDocument();
     });
 
-    it('renders different alert types with correct icons', () => {
+    it('renders different alert types with messages', () => {
         const alerts: any[] = [
             { timestamp: Date.now(), type: 'signal', symbol: 'BTC', message: 'Signal Alert' },
             { timestamp: Date.now(), type: 'pulse', symbol: 'ETH', message: 'Pulse Alert' },
@@ -28,13 +28,8 @@ describe('AlertFeed DOM behavior', () => {
 
         render(<AlertFeed alerts={alerts} />);
 
-        expect(screen.getByText('🚀')).toBeInTheDocument();
+        expect(screen.getByText('Signal Alert')).toBeInTheDocument();
-        expect(screen.getByText('⏰')).toBeInTheDocument();
+        expect(screen.getByText('Pulse Alert')).toBeInTheDocument();
-        expect(screen.getByText('⚠️')).toBeInTheDocument();
-        expect(screen.getByText('ℹ️')).toBeInTheDocument();
-
-        expect(screen.getByText('Signal Alert')).toBeInTheDocument();
-        expect(screen.getByText('Pulse Alert')).toBeInTheDocument();
         expect(screen.getByText('Error Alert')).toBeInTheDocument();
         expect(screen.getByText('Info Alert')).toBeInTheDocument();
     });

web/src/components/AlertFeed.tsx

@@ -1,4 +1,5 @@
-import './AlertFeed.css';
+import { AlertCircle, Bell, Info, Rocket, Timer } from 'lucide-react';
+import './AlertFeed.css';
 
 interface AlertFeedProps {
     alerts: Array<{
@@ -9,12 +10,12 @@ interface AlertFeedProps {
     }>;
 }
 
-const alertTypeIcons: { [key: string]: string } = {
+const alertTypeIcons = {
-    signal: '🚀',
+    signal: Rocket,
-    pulse: '⏰',
+    pulse: Timer,
-    error: '⚠️',
+    error: AlertCircle,
-    info: 'ℹ️'
+    info: Info
-};
+};
 
 export const AlertFeed = ({ alerts }: AlertFeedProps) => {
     const sortedAlerts = [...alerts].reverse().slice(0, 50);
@@ -31,7 +32,13 @@ export const AlertFeed = ({ alerts }: AlertFeedProps) => {
 
     return (
         <div className="alert-feed">
-            <h2>Recent Activity</h2>
+            <div className="alert-feed-header">
+                <div className="alert-feed-title-icon"><Bell size={16} /></div>
+                <div>
+                    <h2>Recent Activity</h2>
+                    <p>{sortedAlerts.length} recent event{sortedAlerts.length === 1 ? '' : 's'} across signals, warnings, and execution.</p>
+                </div>
+            </div>
             <div className="alerts-container">
                 {sortedAlerts.length === 0 && (
                     <div className="alert-empty-state">
@@ -39,19 +46,22 @@ export const AlertFeed = ({ alerts }: AlertFeedProps) => {
                         <span>Signals, warnings, and execution events will appear here as they arrive.</span>
                     </div>
                 )}
-                {sortedAlerts.map((alert, index) => (
+                {sortedAlerts.map((alert, index) => {
+                    const Icon = alertTypeIcons[alert.type] || Info;
+                    return (
                     <div key={index} className={`alert-item alert-${alert.type}`}>
-                        <div className="alert-icon">{alertTypeIcons[alert.type]}</div>
+                        <div className="alert-icon"><Icon size={18} /></div>
-                        <div className="alert-content">
+                        <div className="alert-content">
-                            <div className="alert-header">
+                            <div className="alert-header">
-                                <span className="alert-symbol">{alert.symbol}</span>
+                                <span className="alert-symbol">{alert.symbol || 'System'}</span>
-                                <span className="alert-time">{getTimeAgo(alert.timestamp)}</span>
+                                <span className="alert-time">{getTimeAgo(alert.timestamp)}</span>
-                            </div>
+                            </div>
-                            <div className="alert-message">{alert.message}</div>
+                            <div className="alert-message">{alert.message}</div>
-                        </div>
+                        </div>
-                    </div>
+                    </div>
-                ))}
+                    );
-            </div>
+                })}
-        </div>
+            </div>
-    );
+        </div>
-};
+    );
+};