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/react-native-reanimated/Common/cpp/SharedItems/Shareables.cpp

@@ -0,0 +1,324 @@
+#include "Shareables.h"
+
+using namespace facebook;
+
+namespace reanimated {
+
+jsi::Function getValueUnpacker(jsi::Runtime &rt) {
+  auto valueUnpacker = rt.global().getProperty(rt, "__valueUnpacker");
+  assert(valueUnpacker.isObject() && "valueUnpacker not found");
+  return valueUnpacker.asObject(rt).asFunction(rt);
+}
+
+#ifndef NDEBUG
+
+static const auto callGuardLambda = [](facebook::jsi::Runtime &rt,
+                                       const facebook::jsi::Value &thisVal,
+                                       const facebook::jsi::Value *args,
+                                       size_t count) {
+  return args[0].asObject(rt).asFunction(rt).call(rt, args + 1, count - 1);
+};
+
+jsi::Function getCallGuard(jsi::Runtime &rt) {
+  auto callGuard = rt.global().getProperty(rt, "__callGuardDEV");
+  if (callGuard.isObject()) {
+    // Use JS implementation if `__callGuardDEV` has already been installed.
+    // This is the desired behavior.
+    return callGuard.asObject(rt).asFunction(rt);
+  }
+
+  // Otherwise, fallback to C++ JSI implementation. This is necessary so that we
+  // can install `__callGuardDEV` itself and should happen only once. Note that
+  // the C++ implementation doesn't intercept errors and simply throws them as
+  // C++ exceptions which crashes the app. We assume that installing the guard
+  // doesn't throw any errors.
+  return jsi::Function::createFromHostFunction(
+      rt, jsi::PropNameID::forAscii(rt, "callGuard"), 1, callGuardLambda);
+}
+
+#endif // NDEBUG
+
+jsi::Value makeShareableClone(
+    jsi::Runtime &rt,
+    const jsi::Value &value,
+    const jsi::Value &shouldRetainRemote,
+    const jsi::Value &nativeStateSource) {
+  std::shared_ptr<Shareable> shareable;
+  if (value.isObject()) {
+    auto object = value.asObject(rt);
+    if (!object.getProperty(rt, "__workletHash").isUndefined()) {
+      shareable = std::make_shared<ShareableWorklet>(rt, object);
+    } else if (!object.getProperty(rt, "__init").isUndefined()) {
+      shareable = std::make_shared<ShareableHandle>(rt, object);
+    } else if (object.isFunction(rt)) {
+      auto function = object.asFunction(rt);
+      if (function.isHostFunction(rt)) {
+        shareable =
+            std::make_shared<ShareableHostFunction>(rt, std::move(function));
+      } else {
+        shareable =
+            std::make_shared<ShareableRemoteFunction>(rt, std::move(function));
+      }
+    } else if (object.isArray(rt)) {
+      if (shouldRetainRemote.isBool() && shouldRetainRemote.getBool()) {
+        shareable = std::make_shared<RetainingShareable<ShareableArray>>(
+            rt, object.asArray(rt));
+      } else {
+        shareable = std::make_shared<ShareableArray>(rt, object.asArray(rt));
+      }
+    } else if (object.isArrayBuffer(rt)) {
+      shareable =
+          std::make_shared<ShareableArrayBuffer>(rt, object.getArrayBuffer(rt));
+    } else if (object.isHostObject(rt)) {
+      if (object.isHostObject<ShareableJSRef>(rt)) {
+        return object;
+      }
+      shareable =
+          std::make_shared<ShareableHostObject>(rt, object.getHostObject(rt));
+    } else {
+      if (shouldRetainRemote.isBool() && shouldRetainRemote.getBool()) {
+        shareable = std::make_shared<RetainingShareable<ShareableObject>>(
+            rt, object, nativeStateSource);
+      } else {
+        shareable =
+            std::make_shared<ShareableObject>(rt, object, nativeStateSource);
+      }
+    }
+  } else if (value.isString()) {
+    shareable = std::make_shared<ShareableString>(value.asString(rt).utf8(rt));
+  } else if (value.isUndefined()) {
+    shareable = std::make_shared<ShareableScalar>();
+  } else if (value.isNull()) {
+    shareable = std::make_shared<ShareableScalar>(nullptr);
+  } else if (value.isBool()) {
+    shareable = std::make_shared<ShareableScalar>(value.getBool());
+  } else if (value.isNumber()) {
+    shareable = std::make_shared<ShareableScalar>(value.getNumber());
+#if REACT_NATIVE_MINOR_VERSION >= 71
+  } else if (value.isBigInt()) {
+    shareable = std::make_shared<ShareableBigInt>(rt, value.getBigInt(rt));
+#endif
+  } else if (value.isSymbol()) {
+    // TODO: this is only a placeholder implementation, here we replace symbols
+    // with strings in order to make certain objects to be captured. There isn't
+    // yet any usecase for using symbols on the UI runtime so it is fine to keep
+    // it like this for now.
+    shareable =
+        std::make_shared<ShareableString>(value.getSymbol(rt).toString(rt));
+  } else {
+    throw std::runtime_error(
+        "[Reanimated] Attempted to convert an unsupported value type.");
+  }
+  return ShareableJSRef::newHostObject(rt, shareable);
+}
+
+std::shared_ptr<Shareable> extractShareableOrThrow(
+    jsi::Runtime &rt,
+    const jsi::Value &maybeShareableValue,
+    const std::string &errorMessage) {
+  if (maybeShareableValue.isObject()) {
+    auto object = maybeShareableValue.asObject(rt);
+    if (object.isHostObject<ShareableJSRef>(rt)) {
+      return object.getHostObject<ShareableJSRef>(rt)->value();
+    }
+    throw std::runtime_error(
+        "[Reanimated] Attempted to extract from a HostObject that wasn't converted to a Shareable.");
+  } else if (maybeShareableValue.isUndefined()) {
+    return Shareable::undefined();
+  }
+  throw std::runtime_error(errorMessage);
+}
+
+Shareable::~Shareable() {}
+
+std::shared_ptr<Shareable> Shareable::undefined() {
+  static auto undefined = std::make_shared<ShareableScalar>();
+  return undefined;
+}
+
+template <typename BaseClass>
+jsi::Value RetainingShareable<BaseClass>::getJSValue(jsi::Runtime &rt) {
+  if (&rt == primaryRuntime_) {
+    // TODO: it is suboptimal to generate new object every time getJS is
+    // called on host runtime – the objects we are generating already exists
+    // and we should possibly just grab a hold of such object and use it here
+    // instead of creating a new JS representation. As far as I understand the
+    // only case where it can be realistically called this way is when a
+    // shared value is created and then accessed on the same runtime
+    return BaseClass::toJSValue(rt);
+  }
+  if (secondaryValue_ == nullptr) {
+    auto value = BaseClass::toJSValue(rt);
+    secondaryValue_ = std::make_unique<jsi::Value>(rt, value);
+    secondaryRuntime_ = &rt;
+    return value;
+  }
+  if (&rt == secondaryRuntime_) {
+    return jsi::Value(rt, *secondaryValue_);
+  }
+  return BaseClass::toJSValue(rt);
+}
+
+ShareableJSRef::~ShareableJSRef() {}
+
+ShareableArray::ShareableArray(jsi::Runtime &rt, const jsi::Array &array)
+    : Shareable(ArrayType) {
+  auto size = array.size(rt);
+  data_.reserve(size);
+  for (size_t i = 0; i < size; i++) {
+    data_.push_back(extractShareableOrThrow(rt, array.getValueAtIndex(rt, i)));
+  }
+}
+
+jsi::Value ShareableArray::toJSValue(jsi::Runtime &rt) {
+  auto size = data_.size();
+  auto ary = jsi::Array(rt, size);
+  for (size_t i = 0; i < size; i++) {
+    ary.setValueAtIndex(rt, i, data_[i]->getJSValue(rt));
+  }
+  return ary;
+}
+
+jsi::Value ShareableArrayBuffer::toJSValue(jsi::Runtime &rt) {
+  auto size = static_cast<int>(data_.size());
+  auto arrayBuffer = rt.global()
+                         .getPropertyAsFunction(rt, "ArrayBuffer")
+                         .callAsConstructor(rt, size)
+                         .getObject(rt)
+                         .getArrayBuffer(rt);
+  memcpy(arrayBuffer.data(rt), data_.data(), size);
+  return arrayBuffer;
+}
+
+ShareableObject::ShareableObject(jsi::Runtime &rt, const jsi::Object &object)
+    : Shareable(ObjectType) {
+  auto propertyNames = object.getPropertyNames(rt);
+  auto size = propertyNames.size(rt);
+  data_.reserve(size);
+  for (size_t i = 0; i < size; i++) {
+    auto key = propertyNames.getValueAtIndex(rt, i).asString(rt);
+    auto value = extractShareableOrThrow(rt, object.getProperty(rt, key));
+    data_.emplace_back(key.utf8(rt), value);
+  }
+#if REACT_NATIVE_MINOR_VERSION >= 71
+  if (object.hasNativeState(rt)) {
+    nativeState_ = object.getNativeState(rt);
+  }
+#endif
+}
+
+ShareableObject::ShareableObject(
+    jsi::Runtime &rt,
+    const jsi::Object &object,
+    const jsi::Value &nativeStateSource)
+    : ShareableObject(rt, object) {
+#if REACT_NATIVE_MINOR_VERSION >= 71
+  if (nativeStateSource.isObject() &&
+      nativeStateSource.asObject(rt).hasNativeState(rt)) {
+    nativeState_ = nativeStateSource.asObject(rt).getNativeState(rt);
+  }
+#endif
+}
+
+jsi::Value ShareableObject::toJSValue(jsi::Runtime &rt) {
+  auto obj = jsi::Object(rt);
+  for (size_t i = 0, size = data_.size(); i < size; i++) {
+    obj.setProperty(
+        rt, data_[i].first.c_str(), data_[i].second->getJSValue(rt));
+  }
+#if REACT_NATIVE_MINOR_VERSION >= 71
+  if (nativeState_ != nullptr) {
+    obj.setNativeState(rt, nativeState_);
+  }
+#endif
+  return obj;
+}
+
+jsi::Value ShareableHostObject::toJSValue(jsi::Runtime &rt) {
+  return jsi::Object::createFromHostObject(rt, hostObject_);
+}
+
+jsi::Value ShareableHostFunction::toJSValue(jsi::Runtime &rt) {
+  return jsi::Function::createFromHostFunction(
+      rt, jsi::PropNameID::forUtf8(rt, name_), paramCount_, hostFunction_);
+}
+
+jsi::Value ShareableWorklet::toJSValue(jsi::Runtime &rt) {
+  assert(
+      std::any_of(
+          data_.cbegin(),
+          data_.cend(),
+          [](const auto &item) { return item.first == "__workletHash"; }) &&
+      "ShareableWorklet doesn't have `__workletHash` property");
+  jsi::Value obj = ShareableObject::toJSValue(rt);
+  return getValueUnpacker(rt).call(
+      rt, obj, jsi::String::createFromAscii(rt, "Worklet"));
+}
+
+jsi::Value ShareableRemoteFunction::toJSValue(jsi::Runtime &rt) {
+  if (&rt == runtime_) {
+    return jsi::Value(rt, *function_);
+  } else {
+#ifndef NDEBUG
+    return getValueUnpacker(rt).call(
+        rt,
+        ShareableJSRef::newHostObject(rt, shared_from_this()),
+        jsi::String::createFromAscii(rt, "RemoteFunction"),
+        jsi::String::createFromUtf8(rt, name_));
+#else
+    return ShareableJSRef::newHostObject(rt, shared_from_this());
+#endif
+  }
+}
+
+jsi::Value ShareableHandle::toJSValue(jsi::Runtime &rt) {
+  if (remoteValue_ == nullptr) {
+    auto initObj = initializer_->getJSValue(rt);
+    auto value = std::make_unique<jsi::Value>(getValueUnpacker(rt).call(
+        rt, initObj, jsi::String::createFromAscii(rt, "Handle")));
+
+    // We are locking the initialization here since the thread that is
+    // initalizing can be pre-empted on runtime lock. E.g.
+    // UI thread can be pre-empted on initialization of a shared value and then
+    // JS thread can try to access the shared value, locking the whole runtime.
+    // If we put the lock on `getValueUnpacker` part (basically any part that
+    // requires runtime) we would get a deadlock since UI thread would never
+    // release it.
+    std::unique_lock<std::mutex> lock(initializationMutex_);
+    if (remoteValue_ == nullptr) {
+      remoteValue_ = std::move(value);
+      remoteRuntime_ = &rt;
+    }
+  }
+  return jsi::Value(rt, *remoteValue_);
+}
+
+jsi::Value ShareableString::toJSValue(jsi::Runtime &rt) {
+  return jsi::String::createFromUtf8(rt, data_);
+}
+
+#if REACT_NATIVE_MINOR_VERSION >= 71
+jsi::Value ShareableBigInt::toJSValue(jsi::Runtime &rt) {
+  return rt.global()
+      .getPropertyAsFunction(rt, "BigInt")
+      .call(rt, jsi::String::createFromUtf8(rt, string_));
+}
+#endif
+
+jsi::Value ShareableScalar::toJSValue(jsi::Runtime &) {
+  switch (valueType_) {
+    case Shareable::UndefinedType:
+      return jsi::Value();
+    case Shareable::NullType:
+      return jsi::Value(nullptr);
+    case Shareable::BooleanType:
+      return jsi::Value(data_.boolean);
+    case Shareable::NumberType:
+      return jsi::Value(data_.number);
+    default:
+      throw std::runtime_error(
+          "[Reanimated] Attempted to convert object that's not of a scalar type.");
+  }
+}
+
+} /* namespace reanimated */