feat: Introduce Alerts, Clips, and Settings tabs, update theme colors, and enhance ThemedView, ThemedText, and IconSymbol components.

MobileApp/app/(tabs)/alerts.tsx

@@ -0,0 +1,65 @@
+import { StyleSheet } from 'react-native';
+
+import { ThemedText } from '@/components/themed-text';
+import { ThemedView } from '@/components/themed-view';
+import { IconSymbol } from '@/components/ui/icon-symbol';
+import { Colors } from '@/constants/theme';
+import { useColorScheme } from '@/hooks/use-color-scheme';
+
+export default function AlertsScreen() {
+    const colorScheme = useColorScheme();
+    const theme = colorScheme ?? 'light';
+
+    return (
+        <ThemedView style={styles.container}>
+            <ThemedView style={styles.header}>
+                <ThemedText type="title">Alerts</ThemedText>
+                <ThemedText type="secondary">Recent security activity</ThemedText>
+            </ThemedView>
+
+            <ThemedView
+                style={[styles.card, {
+                    shadowColor: Colors[theme].border,
+                    borderColor: Colors[theme].border
+                }]}
+                variant="card"
+            >
+                <IconSymbol size={48} name="bell.fill" color={Colors[theme].icon} />
+                <ThemedText type="subtitle" style={styles.cardTitle}>No Alerts</ThemedText>
+                <ThemedText style={styles.cardDescription} type="secondary">
+                    You have no new security alerts.
+                </ThemedText>
+            </ThemedView>
+        </ThemedView>
+    );
+}
+
+const styles = StyleSheet.create({
+    container: {
+        flex: 1,
+        padding: 20,
+        paddingTop: 80,
+    },
+    header: {
+        marginBottom: 32,
+    },
+    card: {
+        padding: 32,
+        borderRadius: 16,
+        alignItems: 'center',
+        justifyContent: 'center',
+        borderWidth: 1,
+        shadowOffset: { width: 0, height: 4 },
+        shadowOpacity: 0.1,
+        shadowRadius: 12,
+        elevation: 2,
+    },
+    cardTitle: {
+        marginTop: 16,
+        marginBottom: 8,
+    },
+    cardDescription: {
+        textAlign: 'center',
+        maxWidth: 240,
+    },
+});