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/browser/dist/nodes/Collection.js

@@ -0,0 +1,147 @@
+import { createNode } from '../doc/createNode.js';
+import { isNode, isPair, isCollection, isScalar } from './identity.js';
+import { NodeBase } from './Node.js';
+
+function collectionFromPath(schema, path, value) {
+    let v = value;
+    for (let i = path.length - 1; i >= 0; --i) {
+        const k = path[i];
+        if (typeof k === 'number' && Number.isInteger(k) && k >= 0) {
+            const a = [];
+            a[k] = v;
+            v = a;
+        }
+        else {
+            v = new Map([[k, v]]);
+        }
+    }
+    return createNode(v, undefined, {
+        aliasDuplicateObjects: false,
+        keepUndefined: false,
+        onAnchor: () => {
+            throw new Error('This should not happen, please report a bug.');
+        },
+        schema,
+        sourceObjects: new Map()
+    });
+}
+// Type guard is intentionally a little wrong so as to be more useful,
+// as it does not cover untypable empty non-string iterables (e.g. []).
+const isEmptyPath = (path) => path == null ||
+    (typeof path === 'object' && !!path[Symbol.iterator]().next().done);
+class Collection extends NodeBase {
+    constructor(type, schema) {
+        super(type);
+        Object.defineProperty(this, 'schema', {
+            value: schema,
+            configurable: true,
+            enumerable: false,
+            writable: true
+        });
+    }
+    /**
+     * Create a copy of this collection.
+     *
+     * @param schema - If defined, overwrites the original's schema
+     */
+    clone(schema) {
+        const copy = Object.create(Object.getPrototypeOf(this), Object.getOwnPropertyDescriptors(this));
+        if (schema)
+            copy.schema = schema;
+        copy.items = copy.items.map(it => isNode(it) || isPair(it) ? it.clone(schema) : it);
+        if (this.range)
+            copy.range = this.range.slice();
+        return copy;
+    }
+    /**
+     * Adds a value to the collection. For `!!map` and `!!omap` the value must
+     * be a Pair instance or a `{ key, value }` object, which may not have a key
+     * that already exists in the map.
+     */
+    addIn(path, value) {
+        if (isEmptyPath(path))
+            this.add(value);
+        else {
+            const [key, ...rest] = path;
+            const node = this.get(key, true);
+            if (isCollection(node))
+                node.addIn(rest, value);
+            else if (node === undefined && this.schema)
+                this.set(key, collectionFromPath(this.schema, rest, value));
+            else
+                throw new Error(`Expected YAML collection at ${key}. Remaining path: ${rest}`);
+        }
+    }
+    /**
+     * Removes a value from the collection.
+     * @returns `true` if the item was found and removed.
+     */
+    deleteIn(path) {
+        const [key, ...rest] = path;
+        if (rest.length === 0)
+            return this.delete(key);
+        const node = this.get(key, true);
+        if (isCollection(node))
+            return node.deleteIn(rest);
+        else
+            throw new Error(`Expected YAML collection at ${key}. Remaining path: ${rest}`);
+    }
+    /**
+     * Returns item at `key`, or `undefined` if not found. By default unwraps
+     * scalar values from their surrounding node; to disable set `keepScalar` to
+     * `true` (collections are always returned intact).
+     */
+    getIn(path, keepScalar) {
+        const [key, ...rest] = path;
+        const node = this.get(key, true);
+        if (rest.length === 0)
+            return !keepScalar && isScalar(node) ? node.value : node;
+        else
+            return isCollection(node) ? node.getIn(rest, keepScalar) : undefined;
+    }
+    hasAllNullValues(allowScalar) {
+        return this.items.every(node => {
+            if (!isPair(node))
+                return false;
+            const n = node.value;
+            return (n == null ||
+                (allowScalar &&
+                    isScalar(n) &&
+                    n.value == null &&
+                    !n.commentBefore &&
+                    !n.comment &&
+                    !n.tag));
+        });
+    }
+    /**
+     * Checks if the collection includes a value with the key `key`.
+     */
+    hasIn(path) {
+        const [key, ...rest] = path;
+        if (rest.length === 0)
+            return this.has(key);
+        const node = this.get(key, true);
+        return isCollection(node) ? node.hasIn(rest) : false;
+    }
+    /**
+     * Sets a value in this collection. For `!!set`, `value` needs to be a
+     * boolean to add/remove the item from the set.
+     */
+    setIn(path, value) {
+        const [key, ...rest] = path;
+        if (rest.length === 0) {
+            this.set(key, value);
+        }
+        else {
+            const node = this.get(key, true);
+            if (isCollection(node))
+                node.setIn(rest, value);
+            else if (node === undefined && this.schema)
+                this.set(key, collectionFromPath(this.schema, rest, value));
+            else
+                throw new Error(`Expected YAML collection at ${key}. Remaining path: ${rest}`);
+        }
+    }
+}
+
+export { Collection, collectionFromPath, isEmptyPath };