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/@ide/backoff/LICENSE

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+MIT License
+
+Copyright (c) 2019 James Ide
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

smart-app-city/frontend/node_modules/@ide/backoff/README.md

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+# backoff
+Computes truncated exponential backoff intervals with jitter

smart-app-city/frontend/node_modules/@ide/backoff/build/backoff.d.ts

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+export declare function computeNextBackoffInterval(initialBackoff: number, previousRetryCount: number, { multiplier, randomizationFactor, minBackoff, maxBackoff, }?: {
+    multiplier?: number | undefined;
+    randomizationFactor?: number | undefined;
+    minBackoff?: number | undefined;
+    maxBackoff?: number | undefined;
+}): number;

smart-app-city/frontend/node_modules/@ide/backoff/build/backoff.js

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+"use strict";
+var __importDefault = (this && this.__importDefault) || function (mod) {
+    return (mod && mod.__esModule) ? mod : { "default": mod };
+};
+Object.defineProperty(exports, "__esModule", { value: true });
+const assert_1 = __importDefault(require("assert"));
+function computeNextBackoffInterval(initialBackoff, previousRetryCount, { multiplier = 1.5, randomizationFactor = 0.25, minBackoff = initialBackoff, maxBackoff = Infinity, } = {}) {
+    assert_1.default(initialBackoff > 0, `The initial backoff interval must be positive`);
+    assert_1.default(previousRetryCount >= 0, `The previous retry count must not be negative`);
+    assert_1.default(multiplier >= 1, `The backoff multiplier must be greater than or equal to 1`);
+    assert_1.default(0 <= randomizationFactor && randomizationFactor <= 1, `The randomization factor must be between 0 and 1, inclusive`);
+    assert_1.default(minBackoff >= 0, `The minimum backoff interval must be positive`);
+    let nextBackoff = initialBackoff * multiplier ** previousRetryCount;
+    // Apply jitter within the negative to positive range of the randomization factor
+    let jitterFactor = 1 - randomizationFactor + 2 * randomizationFactor * Math.random();
+    return Math.min(Math.max(nextBackoff * jitterFactor, minBackoff), maxBackoff);
+}
+exports.computeNextBackoffInterval = computeNextBackoffInterval;
+//# sourceMappingURL=backoff.js.map

smart-app-city/frontend/node_modules/@ide/backoff/build/backoff.js.map

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+{"version":3,"file":"backoff.js","sourceRoot":"","sources":["../src/backoff.ts"],"names":[],"mappings":";;;;;AAAA,oDAA4B;AAE5B,SAAgB,0BAA0B,CACxC,cAAsB,EACtB,kBAA0B,EAC1B,EACE,UAAU,GAAG,GAAG,EAChB,mBAAmB,GAAG,IAAI,EAC1B,UAAU,GAAG,cAAc,EAC3B,UAAU,GAAG,QAAQ,GACtB,GAAG,EAAE;IAEN,gBAAM,CAAC,cAAc,GAAG,CAAC,EAAE,+CAA+C,CAAC,CAAC;IAC5E,gBAAM,CAAC,kBAAkB,IAAI,CAAC,EAAE,+CAA+C,CAAC,CAAC;IACjF,gBAAM,CAAC,UAAU,IAAI,CAAC,EAAE,2DAA2D,CAAC,CAAC;IACrF,gBAAM,CACJ,CAAC,IAAI,mBAAmB,IAAI,mBAAmB,IAAI,CAAC,EACpD,6DAA6D,CAC9D,CAAC;IACF,gBAAM,CAAC,UAAU,IAAI,CAAC,EAAE,+CAA+C,CAAC,CAAC;IAEzE,IAAI,WAAW,GAAG,cAAc,GAAG,UAAU,IAAI,kBAAkB,CAAC;IACpE,iFAAiF;IACjF,IAAI,YAAY,GAAG,CAAC,GAAG,mBAAmB,GAAG,CAAC,GAAG,mBAAmB,GAAG,IAAI,CAAC,MAAM,EAAE,CAAC;IACrF,OAAO,IAAI,CAAC,GAAG,CAAC,IAAI,CAAC,GAAG,CAAC,WAAW,GAAG,YAAY,EAAE,UAAU,CAAC,EAAE,UAAU,CAAC,CAAC;AAChF,CAAC;AAvBD,gEAuBC","sourcesContent":["import assert from 'assert';\n\nexport function computeNextBackoffInterval(\n  initialBackoff: number,\n  previousRetryCount: number,\n  {\n    multiplier = 1.5,\n    randomizationFactor = 0.25,\n    minBackoff = initialBackoff,\n    maxBackoff = Infinity,\n  } = {},\n): number {\n  assert(initialBackoff > 0, `The initial backoff interval must be positive`);\n  assert(previousRetryCount >= 0, `The previous retry count must not be negative`);\n  assert(multiplier >= 1, `The backoff multiplier must be greater than or equal to 1`);\n  assert(\n    0 <= randomizationFactor && randomizationFactor <= 1,\n    `The randomization factor must be between 0 and 1, inclusive`,\n  );\n  assert(minBackoff >= 0, `The minimum backoff interval must be positive`);\n\n  let nextBackoff = initialBackoff * multiplier ** previousRetryCount;\n  // Apply jitter within the negative to positive range of the randomization factor\n  let jitterFactor = 1 - randomizationFactor + 2 * randomizationFactor * Math.random();\n  return Math.min(Math.max(nextBackoff * jitterFactor, minBackoff), maxBackoff);\n}\n"]}

smart-app-city/frontend/node_modules/@ide/backoff/package.json

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+{
+  "name": "@ide/backoff",
+  "version": "1.0.0",
+  "description": "Computes truncated exponential backoff intervals with jitter",
+  "main": "build/backoff.js",
+  "files": [
+    "build"
+  ],
+  "scripts": {
+    "clean": "rm -fr build tsconfig.tsbuildinfo",
+    "build": "tsc",
+    "test": "jest"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/ide/backoff.git"
+  },
+  "keywords": [
+    "backoff"
+  ],
+  "author": "James Ide",
+  "license": "MIT",
+  "bugs": {
+    "url": "https://github.com/ide/backoff/issues"
+  },
+  "homepage": "https://github.com/ide/backoff#readme",
+  "jest": {
+    "roots": [
+      "<rootDir>/src/"
+    ],
+    "testEnvironment": "node"
+  },
+  "devDependencies": {
+    "@babel/plugin-transform-modules-commonjs": "^7.5.0",
+    "@babel/preset-typescript": "^7.3.3",
+    "@types/jest": "^24.0.18",
+    "@types/node": "^12.7.2",
+    "jest": "^24.9.0",
+    "typescript": "^3.5.3"
+  }
+}