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/yaml/dist/nodes/YAMLMap.js

@@ -0,0 +1,147 @@
+'use strict';
+
+var stringifyCollection = require('../stringify/stringifyCollection.js');
+var addPairToJSMap = require('./addPairToJSMap.js');
+var Collection = require('./Collection.js');
+var identity = require('./identity.js');
+var Pair = require('./Pair.js');
+var Scalar = require('./Scalar.js');
+
+function findPair(items, key) {
+    const k = identity.isScalar(key) ? key.value : key;
+    for (const it of items) {
+        if (identity.isPair(it)) {
+            if (it.key === key || it.key === k)
+                return it;
+            if (identity.isScalar(it.key) && it.key.value === k)
+                return it;
+        }
+    }
+    return undefined;
+}
+class YAMLMap extends Collection.Collection {
+    static get tagName() {
+        return 'tag:yaml.org,2002:map';
+    }
+    constructor(schema) {
+        super(identity.MAP, schema);
+        this.items = [];
+    }
+    /**
+     * A generic collection parsing method that can be extended
+     * to other node classes that inherit from YAMLMap
+     */
+    static from(schema, obj, ctx) {
+        const { keepUndefined, replacer } = ctx;
+        const map = new this(schema);
+        const add = (key, value) => {
+            if (typeof replacer === 'function')
+                value = replacer.call(obj, key, value);
+            else if (Array.isArray(replacer) && !replacer.includes(key))
+                return;
+            if (value !== undefined || keepUndefined)
+                map.items.push(Pair.createPair(key, value, ctx));
+        };
+        if (obj instanceof Map) {
+            for (const [key, value] of obj)
+                add(key, value);
+        }
+        else if (obj && typeof obj === 'object') {
+            for (const key of Object.keys(obj))
+                add(key, obj[key]);
+        }
+        if (typeof schema.sortMapEntries === 'function') {
+            map.items.sort(schema.sortMapEntries);
+        }
+        return map;
+    }
+    /**
+     * Adds a value to the collection.
+     *
+     * @param overwrite - If not set `true`, using a key that is already in the
+     *   collection will throw. Otherwise, overwrites the previous value.
+     */
+    add(pair, overwrite) {
+        let _pair;
+        if (identity.isPair(pair))
+            _pair = pair;
+        else if (!pair || typeof pair !== 'object' || !('key' in pair)) {
+            // In TypeScript, this never happens.
+            _pair = new Pair.Pair(pair, pair?.value);
+        }
+        else
+            _pair = new Pair.Pair(pair.key, pair.value);
+        const prev = findPair(this.items, _pair.key);
+        const sortEntries = this.schema?.sortMapEntries;
+        if (prev) {
+            if (!overwrite)
+                throw new Error(`Key ${_pair.key} already set`);
+            // For scalars, keep the old node & its comments and anchors
+            if (identity.isScalar(prev.value) && Scalar.isScalarValue(_pair.value))
+                prev.value.value = _pair.value;
+            else
+                prev.value = _pair.value;
+        }
+        else if (sortEntries) {
+            const i = this.items.findIndex(item => sortEntries(_pair, item) < 0);
+            if (i === -1)
+                this.items.push(_pair);
+            else
+                this.items.splice(i, 0, _pair);
+        }
+        else {
+            this.items.push(_pair);
+        }
+    }
+    delete(key) {
+        const it = findPair(this.items, key);
+        if (!it)
+            return false;
+        const del = this.items.splice(this.items.indexOf(it), 1);
+        return del.length > 0;
+    }
+    get(key, keepScalar) {
+        const it = findPair(this.items, key);
+        const node = it?.value;
+        return (!keepScalar && identity.isScalar(node) ? node.value : node) ?? undefined;
+    }
+    has(key) {
+        return !!findPair(this.items, key);
+    }
+    set(key, value) {
+        this.add(new Pair.Pair(key, value), true);
+    }
+    /**
+     * @param ctx - Conversion context, originally set in Document#toJS()
+     * @param {Class} Type - If set, forces the returned collection type
+     * @returns Instance of Type, Map, or Object
+     */
+    toJSON(_, ctx, Type) {
+        const map = Type ? new Type() : ctx?.mapAsMap ? new Map() : {};
+        if (ctx?.onCreate)
+            ctx.onCreate(map);
+        for (const item of this.items)
+            addPairToJSMap.addPairToJSMap(ctx, map, item);
+        return map;
+    }
+    toString(ctx, onComment, onChompKeep) {
+        if (!ctx)
+            return JSON.stringify(this);
+        for (const item of this.items) {
+            if (!identity.isPair(item))
+                throw new Error(`Map items must all be pairs; found ${JSON.stringify(item)} instead`);
+        }
+        if (!ctx.allNullValues && this.hasAllNullValues(false))
+            ctx = Object.assign({}, ctx, { allNullValues: true });
+        return stringifyCollection.stringifyCollection(this, ctx, {
+            blockItemPrefix: '',
+            flowChars: { start: '{', end: '}' },
+            itemIndent: ctx.indent || '',
+            onChompKeep,
+            onComment
+        });
+    }
+}
+
+exports.YAMLMap = YAMLMap;
+exports.findPair = findPair;