feat(frontend): register, guide, feedback, addresses & status polling

- Add register screen with onboarding redirect to address validation
- Add waste separation guide screen with 4 categories and offline tips
  (organicos, reciclables, sanitarios, especiales) plus preventive
  messaging banner
- Add feedback submission screen with 4 types and 1-5 star rating
- Add address screen: list colonias, pick one, validate against backend
- Switch from pull-to-refresh GPS hack to periodic polling of
  /tracking/status (30s) — backend now drives the simulation
- Filter notifications by logged-in user.id (tunnel-view on client side)
- Add register/logout/address actions to profile screen
- Hide login/register/feedback/addresses from tab bar (href: null)
- Set API_URL to LAN IP for physical phone testing over hotspot

frontend/src/app/profile.tsx

@@ -1,4 +1,4 @@
-import { View, Text, StyleSheet } from "react-native";
+import { View, Text, StyleSheet, Alert } from "react-native";
 import { SafeAreaView } from "react-native-safe-area-context";
 import { useRouter } from "expo-router";
 
@@ -6,11 +6,25 @@ import { COLORS } from "../constants/colors";
 import PrimaryButton from "../components/PrimaryButton";
 
 import { useApp } from "../context/AppContext";
+import { resetDemo } from "../services/tracking.service";
 
 export default function ProfileScreen() {
-    const { user, logout } = useApp();
+    const { user, logout, refreshStatus } = useApp();
     const router = useRouter();
 
+    const handleResetDemo = async () => {
+        try {
+            await resetDemo();
+            await refreshStatus();
+            Alert.alert("Demo reiniciado", "Estado y notificaciones borradas.");
+        } catch (err) {
+            Alert.alert(
+                "Error",
+                err instanceof Error ? err.message : "No se pudo reiniciar",
+            );
+        }
+    };
+
     if (!user) {
         return (
             <SafeAreaView style={styles.container}>
@@ -35,7 +49,30 @@ export default function ProfileScreen() {
             <View style={styles.content}>
                 <Text style={styles.title}>Hola, {user.name}</Text>
                 <Text style={styles.email}>{user.email}</Text>
+
                 <View style={{ height: 24 }} />
+
+                <PrimaryButton
+                    title="Mi domicilio"
+                    onPress={() => router.push("/addresses")}
+                />
+
+                <View style={{ height: 12 }} />
+
+                <PrimaryButton
+                    title="Buzón de retroalimentación"
+                    onPress={() => router.push("/feedback")}
+                />
+
+                <View style={{ height: 12 }} />
+
+                <PrimaryButton
+                    title="Reiniciar demo"
+                    onPress={handleResetDemo}
+                />
+
+                <View style={{ height: 12 }} />
+
                 <PrimaryButton title="Cerrar sesión" onPress={handleLogout} />
             </View>
         </SafeAreaView>