refactor: rename package scope from @caldav to @calchat

Rename all workspace packages to reflect the actual project name:
- @caldav/client -> @calchat/client
- @caldav/server -> @calchat/server
- @caldav/shared -> @calchat/shared
- Root package: caldav-mono -> calchat-mono

Update all import statements across client and server to use the new
package names. Update default MongoDB database name and logging service
identifier accordingly.

CLAUDE.md

@@ -18,18 +18,19 @@ npm run format       # Format all TypeScript files with Prettier
 
 ### Client (apps/client) - Expo React Native app
 ```bash
-npm run start -w @caldav/client        # Start Expo dev server
-npm run android -w @caldav/client      # Start on Android
-npm run ios -w @caldav/client          # Start on iOS
-npm run web -w @caldav/client          # Start web version
-npm run lint -w @caldav/client         # Run ESLint
+npm run start -w @calchat/client        # Start Expo dev server
+npm run android -w @calchat/client      # Start on Android
+npm run ios -w @calchat/client          # Start on iOS
+npm run web -w @calchat/client          # Start web version
+npm run lint -w @calchat/client         # Run ESLint
+npm run build:apk -w @calchat/client    # Build APK locally with EAS
 ```
 
 ### Server (apps/server) - Express.js backend
 ```bash
-npm run dev -w @caldav/server          # Start dev server with hot reload (tsx watch)
-npm run build -w @caldav/server        # Compile TypeScript
-npm run start -w @caldav/server        # Run compiled server (port 3000)
+npm run dev -w @calchat/server          # Start dev server with hot reload (tsx watch)
+npm run build -w @calchat/server        # Compile TypeScript
+npm run start -w @calchat/server        # Run compiled server (port 3000)
 ```
 
 ## Technology Stack
@@ -42,6 +43,7 @@ npm run start -w @caldav/server        # Run compiled server (port 3000)
 | | NativeWind | Tailwind CSS for React Native |
 | | Zustand | State management |
 | | FlashList | High-performance lists |
+| | EAS Build | Local APK/IPA builds |
 | Backend | Express.js | Web framework |
 | | MongoDB | Database |
 | | Mongoose | ODM |
@@ -55,9 +57,9 @@ npm run start -w @caldav/server        # Run compiled server (port 3000)
 
 ### Workspace Structure
 ```
-apps/client      - @caldav/client - Expo React Native app
-apps/server      - @caldav/server - Express.js backend
-packages/shared  - @caldav/shared - Shared TypeScript types and models
+apps/client      - @calchat/client - Expo React Native app
+apps/server      - @calchat/server - Express.js backend
+packages/shared  - @calchat/shared - Shared TypeScript types and models
 ```
 
 ### Frontend Architecture (apps/client)
@@ -404,6 +406,29 @@ NODE_ENV=development        # development = pretty logs, production = JSON
 - `ChatStore`: Zustand store with addMessage(), addMessages(), updateMessage(), clearMessages() - loads from server on mount and persists across tab switches
 - Event Detail and Note screens exist as skeletons
 
+## Building
+
+### Local APK Build with EAS
+```bash
+npm run build:apk -w @calchat/client
+```
+
+This uses the `preview` profile from `eas.json` which builds an APK with:
+- `arm64-v8a` architecture only (smaller APK size)
+- No credentials required (`withoutCredentials: true`)
+- Internal distribution
+
+**Requirements:** Android SDK and Java must be installed locally.
+
+**EAS Configuration:** `apps/client/eas.json` contains build profiles:
+- `development`: Development client with internal distribution
+- `preview`: APK build for testing (used by `build:apk`)
+- `production`: Production build with auto-increment versioning
+
+**App Identity:**
+- Package name: `com.gilmour109.calchat`
+- EAS Project ID: `b722dde6-7d89-48ff-9095-e007e7c7da87`
+
 ## Documentation
 
 Detailed architecture diagrams are in `docs/`:

apps/client/app.json

@@ -1,50 +1,37 @@
 {
   "expo": {
     "jsEngine": "hermes",
-    "name": "caldav",
-    "slug": "caldav",
+    "name": "CalChat",
+    "slug": "calchat",
     "version": "1.0.0",
     "orientation": "portrait",
-    "icon": "./assets/images/icon.png",
-    "scheme": "caldav",
+    "scheme": "calchat",
     "userInterfaceStyle": "automatic",
     "newArchEnabled": true,
     "ios": {
       "supportsTablet": true
     },
     "android": {
-      "adaptiveIcon": {
-        "backgroundColor": "#E6F4FE",
-        "foregroundImage": "./assets/images/android-icon-foreground.png",
-        "backgroundImage": "./assets/images/android-icon-background.png",
-        "monochromeImage": "./assets/images/android-icon-monochrome.png"
-      },
+      "package": "com.gilmour109.calchat",
       "edgeToEdgeEnabled": true,
       "predictiveBackGestureEnabled": false
     },
     "web": {
       "output": "static",
-      "favicon": "./assets/images/favicon.png",
       "bundler": "metro"
     },
     "plugins": [
-      "expo-router",
-      [
-        "expo-splash-screen",
-        {
-          "image": "./assets/images/splash-icon.png",
-          "imageWidth": 200,
-          "resizeMode": "contain",
-          "backgroundColor": "#ffffff",
-          "dark": {
-            "backgroundColor": "#000000"
-          }
-        }
-      ]
+      "expo-router"
     ],
     "experiments": {
       "typedRoutes": true,
       "reactCompiler": true
+    },
+    "extra": {
+      "router": {},
+      "eas": {
+        "projectId": "b722dde6-7d89-48ff-9095-e007e7c7da87"
+      }
     }
   }
 }

apps/client/eas.json

@@ -0,0 +1,28 @@
+{
+  "cli": {
+    "version": ">= 16.28.0",
+    "appVersionSource": "remote"
+  },
+  "build": {
+    "development": {
+      "developmentClient": true,
+      "distribution": "internal"
+    },
+    "preview": {
+      "distribution": "internal",
+      "android": {
+        "buildType": "apk",
+        "withoutCredentials": true
+      },
+      "env": {
+        "ORG_GRADLE_PROJECT_reactNativeArchitectures": "arm64-v8a"
+      }
+    },
+    "production": {
+      "autoIncrement": true
+    }
+  },
+  "submit": {
+    "production": {}
+  }
+}

apps/client/package.json

@@ -1,5 +1,5 @@
 {
-  "name": "@caldav/client",
+  "name": "@calchat/client",
   "main": "expo-router/entry",
   "version": "1.0.0",
   "scripts": {
@@ -8,16 +8,18 @@
     "android": "expo start --android",
     "ios": "expo start --ios",
     "web": "expo start --web",
-    "lint": "expo lint"
+    "lint": "expo lint",
+    "build:apk": "eas build --platform android --profile preview --local"
   },
   "dependencies": {
-    "@caldav/shared": "*",
+    "@calchat/shared": "*",
     "@expo/vector-icons": "^15.0.3",
     "@react-navigation/bottom-tabs": "^7.4.0",
     "@react-navigation/elements": "^2.6.3",
     "@react-navigation/native": "^7.1.8",
     "@shopify/flash-list": "^2.0.2",
     "expo": "~54.0.25",
+    "expo-build-properties": "^1.0.10",
     "expo-constants": "~18.0.10",
     "expo-font": "~14.0.9",
     "expo-haptics": "~15.0.7",

apps/client/src/app/(tabs)/calendar.tsx

@@ -7,7 +7,7 @@ import {
   ScrollView,
   Alert,
 } from "react-native";
-import { DAYS, MONTHS, Month, ExpandedEvent } from "@caldav/shared";
+import { DAYS, MONTHS, Month, ExpandedEvent } from "@calchat/shared";
 import Header from "../../components/Header";
 import { EventCard } from "../../components/EventCard";
 import React, {

apps/client/src/app/(tabs)/chat.tsx

@@ -18,7 +18,7 @@ import {
   chatMessageToMessageData,
   MessageData,
 } from "../../stores";
-import { ProposedEventChange } from "@caldav/shared";
+import { ProposedEventChange } from "@calchat/shared";
 import { ProposedEventCard } from "../../components/ProposedEventCard";
 import { Ionicons } from "@expo/vector-icons";
 

apps/client/src/components/EventCard.tsx

@@ -1,5 +1,5 @@
 import { View, Pressable } from "react-native";
-import { ExpandedEvent } from "@caldav/shared";
+import { ExpandedEvent } from "@calchat/shared";
 import { Feather } from "@expo/vector-icons";
 import currentTheme from "../Themes";
 import { EventCardBase } from "./EventCardBase";

apps/client/src/components/EventConfirmDialog.tsx

@@ -1,5 +1,5 @@
 import { View, Text, Modal, Pressable } from "react-native";
-import { CreateEventDTO } from "@caldav/shared";
+import { CreateEventDTO } from "@calchat/shared";
 
 type EventConfirmDialogProps = {
   visible: boolean;

apps/client/src/components/ProposedEventCard.tsx

@@ -1,5 +1,5 @@
 import { View, Text, Pressable } from "react-native";
-import { ProposedEventChange } from "@caldav/shared";
+import { ProposedEventChange } from "@calchat/shared";
 import currentTheme from "../Themes";
 import { EventCardBase } from "./EventCardBase";
 

apps/client/src/services/AuthService.ts

@@ -1,4 +1,4 @@
-import { LoginDTO, CreateUserDTO, AuthResponse } from "@caldav/shared";
+import { LoginDTO, CreateUserDTO, AuthResponse } from "@calchat/shared";
 import { ApiClient } from "./ApiClient";
 import { useAuthStore } from "../stores";
 

apps/client/src/services/ChatService.ts

@@ -7,7 +7,7 @@ import {
   CreateEventDTO,
   UpdateEventDTO,
   EventAction,
-} from "@caldav/shared";
+} from "@calchat/shared";
 import { ApiClient } from "./ApiClient";
 
 interface ConfirmEventRequest {

apps/client/src/services/EventService.ts

@@ -3,7 +3,7 @@ import {
   CreateEventDTO,
   UpdateEventDTO,
   ExpandedEvent,
-} from "@caldav/shared";
+} from "@calchat/shared";
 import { ApiClient } from "./ApiClient";
 
 export const EventService = {

apps/client/src/stores/AuthStore.ts

@@ -1,6 +1,6 @@
 import { create } from "zustand";
 import { Platform } from "react-native";
-import { User } from "@caldav/shared";
+import { User } from "@calchat/shared";
 import * as SecureStore from "expo-secure-store";
 
 const USER_STORAGE_KEY = "auth_user";

apps/client/src/stores/ChatStore.ts

@@ -1,5 +1,5 @@
 import { create } from "zustand";
-import { ChatMessage, ProposedEventChange } from "@caldav/shared";
+import { ChatMessage, ProposedEventChange } from "@calchat/shared";
 
 type BubbleSide = "left" | "right";
 

apps/client/src/stores/EventsStore.ts

@@ -1,5 +1,5 @@
 import { create } from "zustand";
-import { ExpandedEvent } from "@caldav/shared";
+import { ExpandedEvent } from "@calchat/shared";
 
 interface EventsState {
   events: ExpandedEvent[];

apps/server/package.json

@@ -1,5 +1,5 @@
 {
-  "name": "@caldav/server",
+  "name": "@calchat/server",
   "version": "1.0.0",
   "private": true,
   "scripts": {
@@ -8,7 +8,7 @@
     "start": "node dist/app.js"
   },
   "dependencies": {
-    "@caldav/shared": "*",
+    "@calchat/shared": "*",
     "bcrypt": "^6.0.0",
     "dotenv": "^16.4.7",
     "express": "^5.2.1",

apps/server/src/ai/GPTAdapter.ts

@@ -1,5 +1,5 @@
 import OpenAI from "openai";
-import { ProposedEventChange } from "@caldav/shared";
+import { ProposedEventChange } from "@calchat/shared";
 import { AIProvider, AIContext, AIResponse } from "../services/interfaces";
 import {
   buildSystemPrompt,

apps/server/src/ai/utils/eventFormatter.ts

@@ -1,4 +1,4 @@
-import { CalendarEvent } from "@caldav/shared";
+import { CalendarEvent } from "@calchat/shared";
 
 // German date/time formatting helpers
 export const formatDate = (d: Date) => d.toLocaleDateString("de-DE");

apps/server/src/ai/utils/toolExecutor.ts

@@ -3,7 +3,7 @@ import {
   getDay,
   Day,
   DAY_TO_GERMAN,
-} from "@caldav/shared";
+} from "@calchat/shared";
 import { AIContext } from "../../services/interfaces";
 import { formatDate, formatTime, formatDateTime } from "./eventFormatter";
 

apps/server/src/app.ts

@@ -20,7 +20,7 @@ import { logger } from "./logging";
 
 const app = express();
 const port = process.env.PORT || 3000;
-const mongoUri = process.env.MONGODB_URI || "mongodb://localhost:27017/caldav";
+const mongoUri = process.env.MONGODB_URI || "mongodb://localhost:27017/calchat";
 
 // Middleware
 app.use(express.json());

apps/server/src/controllers/ChatController.ts

@@ -5,7 +5,7 @@ import {
   UpdateEventDTO,
   EventAction,
   GetMessagesOptions,
-} from "@caldav/shared";
+} from "@calchat/shared";
 import { ChatService } from "../services";
 import { createLogger } from "../logging";
 import { AuthenticatedRequest } from "./AuthMiddleware";

apps/server/src/logging/logger.ts

@@ -32,7 +32,7 @@ export const logger = pino({
       }
     : undefined,
   base: {
-    service: "caldav-server",
+    service: "calchat-server",
   },
 });
 

apps/server/src/repositories/mongo/MongoChatRepository.ts

@@ -4,7 +4,7 @@ import {
   CreateMessageDTO,
   GetMessagesOptions,
   UpdateMessageDTO,
-} from "@caldav/shared";
+} from "@calchat/shared";
 import { ChatRepository } from "../../services/interfaces";
 import { Logged } from "../../logging";
 import { ChatMessageModel, ConversationModel } from "./models";

apps/server/src/repositories/mongo/MongoEventRepository.ts

@@ -1,4 +1,4 @@
-import { CalendarEvent, CreateEventDTO, UpdateEventDTO } from "@caldav/shared";
+import { CalendarEvent, CreateEventDTO, UpdateEventDTO } from "@calchat/shared";
 import { EventRepository } from "../../services/interfaces";
 import { Logged } from "../../logging";
 import { EventModel } from "./models";

apps/server/src/repositories/mongo/MongoUserRepository.ts

@@ -1,4 +1,4 @@
-import { User } from "@caldav/shared";
+import { User } from "@calchat/shared";
 import { UserRepository, CreateUserData } from "../../services/interfaces";
 import { Logged } from "../../logging";
 import { UserModel, UserDocument } from "./models";

apps/server/src/repositories/mongo/models/ChatModel.ts

@@ -5,7 +5,7 @@ import {
   CreateEventDTO,
   UpdateEventDTO,
   ProposedEventChange,
-} from "@caldav/shared";
+} from "@calchat/shared";
 import { IdVirtual } from "./types";
 
 export interface ChatMessageDocument extends Omit<ChatMessage, "id">, Document {

apps/server/src/repositories/mongo/models/EventModel.ts

@@ -1,5 +1,5 @@
 import mongoose, { Schema, Document, Model } from "mongoose";
-import { CalendarEvent } from "@caldav/shared";
+import { CalendarEvent } from "@calchat/shared";
 import { IdVirtual } from "./types";
 
 export interface EventDocument extends Omit<CalendarEvent, "id">, Document {

apps/server/src/repositories/mongo/models/UserModel.ts

@@ -1,5 +1,5 @@
 import mongoose, { Schema, Document, Model } from "mongoose";
-import { User } from "@caldav/shared";
+import { User } from "@calchat/shared";
 import { IdVirtual } from "./types";
 
 export interface UserDocument extends Omit<User, "id">, Document {

apps/server/src/services/AuthService.ts

@@ -1,4 +1,4 @@
-import { User, CreateUserDTO, LoginDTO, AuthResponse } from "@caldav/shared";
+import { User, CreateUserDTO, LoginDTO, AuthResponse } from "@calchat/shared";
 import { UserRepository } from "./interfaces";
 import * as jwt from "../utils/jwt";
 import * as password from "../utils/password";

apps/server/src/services/ChatService.ts

@@ -10,7 +10,7 @@ import {
   UpdateEventDTO,
   EventAction,
   CreateMessageDTO,
-} from "@caldav/shared";
+} from "@calchat/shared";
 import { ChatRepository, EventRepository, AIProvider } from "./interfaces";
 import { getWeeksOverview, getMonthOverview } from "../utils/eventFormatters";
 

apps/server/src/services/EventService.ts

@@ -3,7 +3,7 @@ import {
   CreateEventDTO,
   UpdateEventDTO,
   ExpandedEvent,
-} from "@caldav/shared";
+} from "@calchat/shared";
 import { EventRepository } from "./interfaces";
 import { expandRecurringEvents } from "../utils/recurrenceExpander";
 

apps/server/src/services/interfaces/AIProvider.ts

@@ -2,7 +2,7 @@ import {
   CalendarEvent,
   ChatMessage,
   ProposedEventChange,
-} from "@caldav/shared";
+} from "@calchat/shared";
 
 export interface AIContext {
   userId: string;

apps/server/src/services/interfaces/ChatRepository.ts

@@ -4,7 +4,7 @@ import {
   CreateMessageDTO,
   GetMessagesOptions,
   UpdateMessageDTO,
-} from "@caldav/shared";
+} from "@calchat/shared";
 
 export interface ChatRepository {
   // Conversations

apps/server/src/services/interfaces/EventRepository.ts

@@ -1,4 +1,4 @@
-import { CalendarEvent, CreateEventDTO, UpdateEventDTO } from "@caldav/shared";
+import { CalendarEvent, CreateEventDTO, UpdateEventDTO } from "@calchat/shared";
 
 export interface EventRepository {
   findById(id: string): Promise<CalendarEvent | null>;

apps/server/src/services/interfaces/UserRepository.ts

@@ -1,4 +1,4 @@
-import { User } from "@caldav/shared";
+import { User } from "@calchat/shared";
 
 export interface CreateUserData {
   email: string;

apps/server/src/utils/eventFormatters.ts

@@ -5,7 +5,7 @@ import {
   DAY_TO_GERMAN_SHORT,
   MONTH_TO_GERMAN,
   ExpandedEvent,
-} from "@caldav/shared";
+} from "@calchat/shared";
 import { EventRepository } from "../services/interfaces";
 import { expandRecurringEvents } from "./recurrenceExpander";
 

apps/server/src/utils/recurrenceExpander.ts

@@ -1,5 +1,5 @@
 import { RRule, rrulestr } from "rrule";
-import { CalendarEvent, ExpandedEvent } from "@caldav/shared";
+import { CalendarEvent, ExpandedEvent } from "@calchat/shared";
 
 // Convert local time to "fake UTC" for rrule
 // rrule interprets all dates as UTC internally, so we need to trick it

package.json

@@ -1,5 +1,5 @@
 {
-  "name": "caldav-mono",
+  "name": "calchat-mono",
   "version": "1.0.0",
   "private": true,
   "workspaces": [

packages/shared/package.json

@@ -1,5 +1,5 @@
 {
-  "name": "@caldav/shared",
+  "name": "@calchat/shared",
   "version": "1.0.0",
   "private": true,
   "main": "./src/index.ts",