feat(smart-app): implement complete mobile app MVP

- App.tsx: full navigation (Auth stack + Main tabs with 5 screens)
- Auth: LoginScreen, RegisterScreen, ForgotPasswordScreen
- HomeScreen: dashboard with IoT metrics, weather widget, alerts, quick actions, sensors
- MapScreen: interactive map with layer toggles (6 layers)
- MarketplaceScreen: categories (6), products (5), search
- ChatScreen: AI chat with quick prompts (4), bot responses
- ProfileScreen: user info, stats, menu (9 items), logout
- AlertsScreen: alert list with severity, acknowledge
- SensorsScreen: sensor list with type filters (6 types), search
- ZonesScreen: zone cards with stats
- SettingsScreen: language picker (FR/EN/ES/DE), privacy, about
- Stores: iotStore (sensors, zones, alerts), notificationStore, uiStore + i18n
- Hooks: useSensors, useAlerts, useNotifications, useLocation
- Components: Card, Button, LoadingSpinner, ErrorBoundary, Header
- Services: iotService, notificationService (with axios API client)
- Utils: formatters (temp, AQI, noise, dates), validators (email, password, IBAN)
- Theme: colors.ts with full design system (Blue Ocean palette)
- Ditto: fixed MongoDB connection, new JWT secrets, official gateway image

smart-app-city/frontend/node_modules/ob1/src/__flowtests__/ob1-flowtest.js

@@ -0,0 +1,37 @@
+"use strict";
+
+const { add, add0, add1, get0, get1, inc, neg, sub, sub1 } = require("../ob1");
+const FORTY_TWO_0 = add0(42);
+const FORTY_TWO_1 = add1(42);
+module.exports = {
+  testSafeOps() {
+    add(FORTY_TWO_0, FORTY_TWO_0);
+    add(FORTY_TWO_0, FORTY_TWO_1);
+    add(FORTY_TWO_1, FORTY_TWO_0);
+    sub(FORTY_TWO_1, FORTY_TWO_1);
+    add(FORTY_TWO_0, 9000);
+    add(FORTY_TWO_0, 9000);
+    add(FORTY_TWO_1, 9000);
+    sub(FORTY_TWO_1, 9000);
+    get0(FORTY_TWO_0);
+    get1(FORTY_TWO_1);
+    neg(FORTY_TWO_0);
+    add1(FORTY_TWO_0);
+    sub1(FORTY_TWO_1);
+    inc(FORTY_TWO_0);
+    inc(FORTY_TWO_1);
+  },
+  testUnsafeOps() {
+    add(FORTY_TWO_1, FORTY_TWO_1);
+    sub(FORTY_TWO_0, FORTY_TWO_1);
+    FORTY_TWO_0 - 1;
+    FORTY_TWO_1 - 1;
+    get0(FORTY_TWO_1);
+    get1(FORTY_TWO_0);
+    neg(FORTY_TWO_1);
+    add1(FORTY_TWO_1);
+    sub1(FORTY_TWO_0);
+    get0(42);
+    get1(42);
+  },
+};

smart-app-city/frontend/node_modules/ob1/src/__flowtests__/ob1-flowtest.js.flow

@@ -0,0 +1,72 @@
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow strict-local
+ * @format
+ * @oncall react_native
+ */
+
+'use strict';
+
+import type {Number0, Number1} from '../ob1';
+
+const {add, add0, add1, get0, get1, inc, neg, sub, sub1} = require('../ob1');
+const FORTY_TWO_0 = add0(42);
+const FORTY_TWO_1 = add1(42);
+
+module.exports = {
+  testSafeOps() {
+    (add(FORTY_TWO_0, FORTY_TWO_0): Number0);
+    (add(FORTY_TWO_0, FORTY_TWO_1): Number1);
+    (add(FORTY_TWO_1, FORTY_TWO_0): Number1);
+    (sub(FORTY_TWO_1, FORTY_TWO_1): Number0);
+    (add(FORTY_TWO_0, 9000): Number0);
+    (add(FORTY_TWO_0, 9000): Number0);
+    (add(FORTY_TWO_1, 9000): Number1);
+    (sub(FORTY_TWO_1, 9000): Number1);
+    (get0(FORTY_TWO_0): number);
+    (get1(FORTY_TWO_1): number);
+    (neg(FORTY_TWO_0): Number0);
+    (add1(FORTY_TWO_0): Number1);
+    (sub1(FORTY_TWO_1): Number0);
+    (inc(FORTY_TWO_0): Number0);
+    (inc(FORTY_TWO_1): Number1);
+  },
+  testUnsafeOps() {
+    // $FlowExpectedError - adding two 1-based offsets.
+    add(FORTY_TWO_1, FORTY_TWO_1);
+
+    // $FlowExpectedError - subtracting 1-based offset from 0-based offset.
+    sub(FORTY_TWO_0, FORTY_TWO_1);
+
+    // $FlowExpectedError - direct computations with offsets are disallowed.
+    FORTY_TWO_0 - 1;
+
+    // $FlowExpectedError - direct computations with offsets are disallowed.
+    FORTY_TWO_1 - 1;
+
+    // $FlowExpectedError - extracting a 1-based offset as a 0-based number
+    get0(FORTY_TWO_1);
+
+    // $FlowExpectedError - extracting a 0-based offset as a 1-based number
+    get1(FORTY_TWO_0);
+
+    // $FlowExpectedError - negating a 1-based offset
+    neg(FORTY_TWO_1);
+
+    // $FlowExpectedError - adding 1 to an offset that's already 1-based
+    add1(FORTY_TWO_1);
+
+    // $FlowExpectedError - subtracting 1 from an offset that's already 0-based
+    sub1(FORTY_TWO_0);
+
+    // $FlowExpectedError - extracting an arbitrary number as a 0-based number
+    get0(42);
+
+    // $FlowExpectedError - extracting an arbitrary number as a 1-based number
+    get1(42);
+  },
+};

smart-app-city/frontend/node_modules/ob1/src/ob1.js

@@ -0,0 +1,40 @@
+"use strict";
+
+function add(a, b) {
+  return a + b;
+}
+function sub(a, b) {
+  return a - b;
+}
+function get0(x) {
+  return x;
+}
+function get1(x) {
+  return x;
+}
+function add1(x) {
+  return x + 1;
+}
+function sub1(x) {
+  return x - 1;
+}
+function neg(x) {
+  return -x;
+}
+function add0(x) {
+  return x;
+}
+function inc(x) {
+  return x + 1;
+}
+module.exports = {
+  add,
+  get0,
+  get1,
+  add1,
+  sub1,
+  sub,
+  neg,
+  add0,
+  inc,
+};

smart-app-city/frontend/node_modules/ob1/src/ob1.js.flow

@@ -0,0 +1,90 @@
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow strict-local
+ * @format
+ * @oncall react_native
+ */
+
+'use strict';
+
+/* eslint-disable no-redeclare */
+
+// A type representing 0-based offsets.
+export opaque type Number0 = number;
+// A type representing 1-based offsets.
+export opaque type Number1 = number;
+
+// Add two offsets or numbers.
+declare function add(a: Number1, b: number): Number1;
+declare function add(a: number, b: Number1): Number1;
+declare function add(a: Number0, b: number): Number0;
+declare function add(a: number, b: Number0): Number0;
+declare function add(a: Number1, b: Number0): Number1;
+declare function add(a: Number0, b: Number1): Number1;
+declare function add(a: Number0, b: Number0): Number0;
+
+function add(a: number, b: number): number {
+  return a + b;
+}
+
+// Subtract a number or 0-based offset from a 1/0-based offset.
+declare function sub(a: Number1, b: number): Number1;
+declare function sub(a: Number0, b: number): Number0;
+declare function sub(a: number, b: Number0): Number0;
+declare function sub(a: Number0, b: number): Number0;
+declare function sub(a: Number1, b: Number0): Number1;
+declare function sub(a: Number0, b: Number0): Number0;
+declare function sub(a: Number1, b: Number1): Number0;
+
+function sub(a: number, b: number): number {
+  return a - b;
+}
+
+// Get the underlying number of a 0-based offset, casting away the opaque type.
+declare function get0(x: Number0): number;
+declare function get0(x: void | null): void | null;
+function get0(x: number): number {
+  return x;
+}
+
+// Get the underlying number of a 1-based offset, casting away the opaque type.
+declare function get1(x: Number1): number;
+declare function get1(x: void | null): void | null;
+function get1(x: number): number {
+  return x;
+}
+
+// Add 1 to a 0-based offset, thus converting it to 1-based.
+function add1(x: Number0 | number): Number1 {
+  return x + 1;
+}
+
+// Subtract 1 from a 1-based offset, thus converting it to 0-based.
+function sub1(x: Number1): Number0 {
+  return x - 1;
+}
+
+// Negate a 0-based offset.
+function neg(x: Number0): Number0 {
+  return -x;
+}
+
+// Cast a number to a 0-based offset.
+function add0(x: number): Number0 {
+  return x;
+}
+
+// Increment a 0-based offset.
+declare function inc(a: Number0): Number0;
+// Increment a 1-based offset.
+declare function inc(a: Number1): Number1;
+
+function inc(x: number): number {
+  return x + 1;
+}
+
+module.exports = {add, get0, get1, add1, sub1, sub, neg, add0, inc};