Merge branch 'master' into copilot/make-byte-limit-configurable

Upgrade to Node.js 24, update dependencies, migrate configs to ES modules, replace ts-node with tsx, upgrade React/Material-UI, and update GitHub Actions (#940 )
## Update Dependencies, Node.js 24, and Migrate to ES Modules This PR updates the project dependencies, Node.js version, workflows, and migrates from CommonJS to ES modules. ### Checklist #### Phase 1: Assessment and Configuration - [x] Assess current project structure and dependencies - [x] Update Node.js version requirements (>=24 for builds, >=20 for runtime) - [x] Update GitHub workflow files to use Node 24 - [x] Update Dockerfile to use Node 24 #### Phase 2: TypeScript Configuration for ES Modules - [x] Update root tsconfig.json to use ES2020 target with CommonJS modules - [x] Update backend/tsconfig.json to use ES2020 target with CommonJS modules - [x] Update app/tsconfig.json to use ES2020 target with ESNext modules #### Phase 3: Update Dependencies - [x] Update root package.json dependencies to latest compatible versions - [x] Update app/package.json dependencies to latest compatible versions - [x] Update backend/package.json dependencies to latest compatible versions - [x] Run yarn install to update lockfile #### Phase 4: Convert CommonJS to ES Modules - [x] Convert webpack config files to ES modules (.js → .mjs) - [x] Convert prettier.config.js to ES modules - [x] Update TypeScript files with CommonJS require() to use ES imports - [x] Fix breaking changes from dependency API updates #### Phase 5: Replace ts-node with tsx - [x] Replace ts-node with tsx in all package.json scripts - [x] Update root package.json to use tsx for prepare-release and package scripts - [x] Update backend package.json to use tsx with mocha - [x] Update app package.json to use tsx with mocha - [x] Update script shebangs to use tsx - [x] Add tsx to devDependencies, remove ts-node #### Phase 6: Upgrade React and Material-UI - [x] Upgrade React from 16.14.0 to 18.3.1 - [x] Upgrade React-DOM from 16.14.0 to 18.3.1 - [x] Migrate from @material-ui (v4) to @mui/material (v5) - [x] Add @emotion/react and @emotion/styled (required for MUI v5) - [x] Update all import paths from @material-ui/* to @mui/* - [x] Update theme creation from createMuiTheme to createTheme - [x] Update palette.type to palette.mode - [x] Update ReactDOM.render to ReactDOM.createRoot (React 18) - [x] Update ThemeProvider import to use @mui/material/styles - [x] Add @mui/styles for withStyles compatibility - [x] Separate Theme and withStyles imports correctly - [x] Replace fade with alpha in theme styles - [x] Replace ExpansionPanel with Accordion - [x] Fix all component imports from wrong modules - [x] Replace withTheme HOC with useTheme hook - [x] Replace theme.palette.text.hint with theme.palette.text.secondary - [x] Update all Redux reducers for Redux v5 compatibility #### Phase 7: Fix All TypeScript Errors - [x] Fix Dialog disableBackdropClick removal (use onClose handler) - [x] Fix Button classes.label removal (use sx prop) - [x] Fix Select onChange signature (MUI v5 API change) - [x] Fix Snackbar onClose signature (MUI v5 API change) - [x] Fix ClickAwayListener onClickAway signature (MUI v5 API change) - [x] Fix ReactResizeDetector (migrate to useResizeDetector hook) - [x] Fix Redux connect + withStyles type compatibility (use type assertions) - [x] Fix all connected component prop type errors - [x] Add children prop to ErrorBoundary - [x] Add parameter types to callbacks #### Phase 8: Build and Test - [x] Run yarn build - ✅ **SUCCESSFUL with 0 errors, 1 minor warning** - [x] Run yarn test - ✅ **All 27 tests passing (5 app + 22 backend)** #### Phase 9: Update All GitHub Actions - [x] Update Node.js to 24 in copilot-setup.yml workflow - [x] Update Node.js to 24 in update-website.yml workflow - [x] Update docker/build-push-action from v5 to v6 - [x] Replace deprecated tibdex/github-app-token@v2 with actions/create-github-app-token@v1 - [x] All other actions already at latest versions (v4 for GitHub actions, v3 for Docker actions) #### Phase 10: Final Validation - [x] All TypeScript compilation errors fixed - [x] All tests passing - [x] Build completes successfully - [x] Clarified Node.js engine requirements per use case - [x] All GitHub Actions updated to latest versions ### Node.js Version Requirements This project has different Node.js requirements depending on the use case: #### Building the Electron App (Root package.json) - **Required:** Node.js >= 24 - **Why:** Build tools like @electron/notarize and semantic-release require Node.js 24+ - **Affected files:** `/package.json` #### Running the Backend/Server (Backend package.json) - **Required:** Node.js >= 20 - **Why:** The MQTT server runtime is compatible with Node.js 20+ - **Affected files:** `/backend/package.json` #### Frontend App (App package.json) - **Required:** Node.js >= 20 - **Why:** React and webpack tools are compatible with Node.js 20+ - **Affected files:** `/app/package.json` ### Summary of All Changes **Major Dependency Updates:** - TypeScript: 4.5.5 → 5.9.3 - Node.js: >=24 for builds, >=20 for runtime - React: 16.14.0 → 18.3.1 - React-DOM: 16.14.0 → 18.3.1 - Redux: 4.2.1 → 5.0.1 - @material-ui/core → @mui/material 5.18.0 - @material-ui/icons → @mui/icons-material 5.18.0 - mqtt: 4.3.6 → 5.14.1 - axios: 0.28.0 → 1.13.2 - redux-thunk: 2.3.0 → 3.1.0 - electron-builder: 24.13.3 → 26.0.12 - @electron/notarize: 3.1.1 (latest) - semantic-release: 25.0.2 (latest) - react-resize-detector: migrated to useResizeDetector hook - 50+ other dependencies **GitHub Actions Updated:** - ✅ actions/checkout@v4 (latest) - ✅ actions/setup-node@v4 (latest) - Now uses Node 24 in all workflows - ✅ actions/cache@v4 (latest) - ✅ actions/upload-artifact@v4 (latest) - ✅ docker/build-push-action: v5 → **v6** (latest) - ✅ docker/login-action@v3 (latest) - ✅ docker/setup-buildx-action@v3 (latest) - ✅ cycjimmy/semantic-release-action@v4 (latest) - ✅ tibdex/github-app-token@v2 → **actions/create-github-app-token@v1** (official replacement for deprecated action) - ✅ stefanzweifel/git-auto-commit-action@v5 (latest) - ✅ hkusu/s3-upload-action@v2 (latest) **All TypeScript Errors Fixed:** - Removed disableBackdropClick from Dialog (deprecated in MUI v5) - Removed Button classes.label (deprecated in MUI v5) - Updated all event handler signatures to match MUI v5 APIs - Migrated ReactResizeDetector component to useResizeDetector hook - Added type assertions for Redux connect + withStyles compatibility - Fixed all connected component prop passing - Added missing children props to components **Final Result:** ✅ **0 TypeScript errors** ✅ **27/27 tests passing** ✅ **Build successful** ✅ **Node 24 for builds, Node 20+ for runtime** ✅ **All GitHub Actions updated to latest versions** ⚠️ 1 minor warning (source map parsing in ace-builds dependency)  <details> <summary>Original prompt</summary> > > ---- > > *This section details on the original issue you should resolve* > > <issue_title>update dependencies</issue_title> > <issue_description>- update to nodejs 24 > - update npm dependencies > - update workflows > - change from commons to esmodules</issue_description> > > ## Comments on the Issue (you are @copilot in this section) > > <comments> > </comments> > </details>  - Fixes thomasnordquist/MQTT-Explorer#939  --- 💬 We'd love your input! Share your thoughts on Copilot coding agent in our [2 minute survey](https://gh.io/copilot-coding-agent-survey). --------- Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com> Co-authored-by: thomasnordquist <7721625+thomasnordquist@users.noreply.github.com> Co-authored-by: Thomas Nordquist <thomasnordquist@users.noreply.github.com>
2026-09-12 01:23:31 +00:00 · 2025-12-21 13:46:34 +01:00 · 2025-12-21 10:20:08 +01:00 · 2025-12-21 09:59:50 +01:00 · 2025-12-20 23:26:15 +01:00 · 2025-12-20 19:34:34 +01:00
159 changed files with 12410 additions and 4661 deletions
@@ -0,0 +1,46 @@
+{
+  "name": "MQTT Explorer Development",
+  "dockerComposeFile": "docker-compose.yml",
+  "service": "app",
+  "workspaceFolder": "/workspace",
+
+  "customizations": {
+    "vscode": {
+      "extensions": [
+        "dbaeumer.vscode-eslint",
+        "esbenp.prettier-vscode",
+        "ms-vscode.vscode-typescript-next",
+        "ms-azuretools.vscode-docker",
+        "eamodio.gitlens"
+      ],
+      "settings": {
+        "editor.formatOnSave": true,
+        "editor.defaultFormatter": "esbenp.prettier-vscode",
+        "typescript.tsdk": "node_modules/typescript/lib",
+        "editor.codeActionsOnSave": {
+          "source.fixAll.eslint": "explicit"
+        }
+      }
+    }
+  },
+
+  "forwardPorts": [3000, 8080, 1883],
+  "portsAttributes": {
+    "3000": {
+      "label": "MQTT Explorer Server",
+      "onAutoForward": "notify"
+    },
+    "8080": {
+      "label": "Webpack Dev Server",
+      "onAutoForward": "notify"
+    },
+    "1883": {
+      "label": "MQTT Broker",
+      "onAutoForward": "ignore"
+    }
+  },
+
+  "postCreateCommand": "yarn install",
+
+  "remoteUser": "node"
+}
@@ -0,0 +1,21 @@
+version: '3.8'
+
+services:
+  app:
+    image: mcr.microsoft.com/devcontainers/javascript-node:20
+    volumes:
+      - ../..:/workspace:cached
+    command: sleep infinity
+    network_mode: service:mosquitto
+    environment:
+      - MQTT_EXPLORER_USERNAME=dev
+      - MQTT_EXPLORER_PASSWORD=dev123
+
+  mosquitto:
+    image: eclipse-mosquitto:2
+    ports:
+      - "1883:1883"
+      - "3000:3000"
+      - "8080:8080"
+    volumes:
+      - ./mosquitto.conf:/mosquitto/config/mosquitto.conf:ro
@@ -0,0 +1,4 @@
+# Mosquitto configuration for development
+listener 1883
+allow_anonymous true
+persistence false
@@ -1,5 +1,19 @@
 # GitHub Copilot Agent Instructions for MQTT Explorer

+## Overview
+
+MQTT Explorer is an Electron-based desktop application for exploring MQTT brokers. It provides a comprehensive UI for connecting to MQTT brokers, browsing topics, and analyzing message flows.
+
+## Technology Stack
+
+- **Frontend**: React 16.x with Material-UI
+- **Backend**: Node.js with TypeScript
+- **Desktop Framework**: Electron 29.x
+- **MQTT Client**: [mqttjs](https://github.com/mqttjs/MQTT.js) v4.x
+- **State Management**: Redux with redux-thunk
+- **Build Tools**: webpack, TypeScript compiler
+- **Testing**: Mocha + Chai for unit tests, Playwright for MCP introspection tests
+
 ## Project Setup

 ### Building and Running
@@ -11,6 +25,10 @@ yarn install
 # Build the project
 yarn build

+# Set password for browser testing
+export MQTT_EXPLORER_USERNAME=admin
+export MQTT_EXPLORER_PASSWORD=secretpassword
+
 # Start the application
 yarn start

@@ -40,6 +58,94 @@ electron . --enable-mcp-introspection --remote-debugging-port=9223
 3. **Include screenshots** - Visual verification is required for UI changes
 4. **Handle asynchronous operations properly** - This is an MQTT message queue tool

+### Best Practices for UI Tests
+
+#### 1. Use Given-When-Then Pattern
+Structure tests with clear Given-When-Then comments to make them readable:
+
+```typescript
+it('Given a JSON message sent to topic foo/bar/baz, the tree should display nested topics', async function () {
+  // Given: Mock MQTT publishes JSON to foo/bar/baz
+  // When: We wait for the topic to appear in the tree
+  // Then: Topic hierarchy should be visible (foo -> bar -> baz)
+})
+```
+
+#### 2. Wait for Elements, Don't Use Fixed Delays
+Prefer `waitFor` over `sleep` whenever possible:
+
+```typescript
+// ✓ Good: Wait for specific element
+const topic = await page.locator('span[data-test-topic="kitchen"]')
+await topic.waitFor({ state: 'visible', timeout: 5000 })
+
+// ✗ Bad: Fixed delay without verification
+await sleep(5000)
+```
+
+#### 3. Use Meaningful Assertions
+Every test should have explicit assertions that verify the expected state:
+
+```typescript
+// ✓ Good: Explicit assertion with meaningful message
+const treeNodes = await page.locator('[class*="TreeNode"]')
+const count = await treeNodes.count()
+expect(count).to.be.greaterThan(0, 'Topic tree should contain nodes')
+
+// ✗ Bad: No assertion, only screenshot
+await page.screenshot({ path: 'test.png' })
+```
+
+#### 4. Test Data-Driven Scenarios
+Write tests that describe the data flow:
+
+```typescript
+it('Given messages sent to livingroom/lamp/state and livingroom/lamp/brightness, both should appear under livingroom/lamp', async function () {
+  // Test implementation verifies the specific data flow
+})
+```
+
+#### 5. Use Data Test Attributes
+Leverage `data-test-*` attributes for reliable selectors:
+
+```typescript
+// ✓ Good: Use data-test attributes
+const topic = await page.locator('span[data-test-topic="kitchen"]')
+
+// ⚠ Acceptable: Use role/text when data attributes aren't available
+const button = await page.locator('//button/span[contains(text(),"Connect")]')
+
+// ✗ Bad: Rely on CSS classes that may change
+const topic = await page.locator('.MuiTreeItem-label')
+```
+
+#### 6. Verify Multiple Aspects
+Test should verify both state and UI:
+
+```typescript
+// Verify the action completed
+const isVisible = await disconnectButton.isVisible()
+expect(isVisible).to.be.true
+
+// Capture screenshot for visual verification
+await page.screenshot({ path: 'test-screenshot-connection.png' })
+```
+
+#### 7. Handle MQTT Asynchronous Nature
+Account for message propagation time:
+
+```typescript
+// Publish message
+await mockClient.publish('topic/name', 'value')
+
+// Wait for UI to update
+await page.locator(`text="value"`).waitFor({ timeout: 5000 })
+
+// Verify state
+const value = await page.textContent('.message-value')
+expect(value).toBe('value')
+```
+
 ### Handling MQTT Asynchronous Operations

 MQTT is inherently asynchronous. When writing tests:
@@ -82,6 +188,59 @@ yarn lint
 yarn lint:fix
 ```

+### Running UI Tests (yarn test:ui)
+
+The UI tests require specific setup in the test environment:
+
+**Prerequisites:**
+1. **Xvfb (X Virtual Framebuffer)** - Required for headless Electron testing
+   ```bash
+   # Start Xvfb on display :99
+   Xvfb :99 -screen 0 1024x720x24 -ac &
+   export DISPLAY=:99
+   ```
+
+2. **Mosquitto MQTT Broker** - Required for MQTT message testing
+   ```bash
+   # Install mosquitto
+   sudo apt-get install -y mosquitto mosquitto-clients
+   
+   # Start mosquitto service
+   sudo systemctl start mosquitto
+   
+   # Verify it's running on port 1883
+   sudo systemctl status mosquitto
+   ```
+
+3. **@types/node** - Required for TypeScript compilation
+   ```bash
+   yarn add -D @types/node
+   ```
+
+**Running UI Tests:**
+```bash
+# Build the application first
+yarn build
+
+# Run UI tests with proper display
+DISPLAY=:99 yarn test:ui
+```
+
+**Common Issues:**
+- **"Timeout exceeded" in before hook**: Mosquitto is not running or not accessible on port 1883
+- **"Cannot find type definition file for 'node'"**: Run `yarn add -D @types/node`
+- **Electron fails to launch**: Xvfb is not running or DISPLAY variable not set
+- **Tests hang**: Check if old Electron/mosquitto processes are still running and kill them
+
+**Environment Cleanup:**
+```bash
+# Kill old Electron processes
+ps aux | grep electron | grep -v grep | awk '{print $2}' | xargs kill -9 2>/dev/null
+
+# Kill old mosquitto processes (if running custom instance)
+ps aux | grep mosquitto | grep -v grep | awk '{print $2}' | xargs kill -9 2>/dev/null
+```
+
 ## MCP Introspection Testing

 The project supports MCP (Model Context Protocol) for automated testing with Playwright:
@@ -97,9 +256,128 @@ The project supports MCP (Model Context Protocol) for automated testing with Pla
 - `src/` - Electron main process and bindings
 - `src/spec/` - Test specifications including MCP introspection tests

+## Code Style and Formatting
+
+### Linting
+
+The project uses TSLint with Airbnb config and Prettier for code formatting:
+
+```bash
+# Run all linters
+yarn lint
+
+# Run linters individually
+yarn lint:prettier    # Check Prettier formatting
+yarn lint:tslint      # Check TSLint rules
+yarn lint:spellcheck  # Check spelling in code
+
+# Auto-fix issues
+yarn lint:fix         # Fix TSLint and Prettier issues
+yarn lint:tslint:fix  # Fix TSLint issues only
+yarn lint:prettier:fix # Fix Prettier issues only
+```
+
+### Code Style Rules
+
+- **Semicolons**: Never use semicolons (enforced by TSLint and Prettier)
+- **Quotes**: Single quotes for strings
+- **Indentation**: 2 spaces
+- **Line length**: Maximum 120 characters (Prettier) / 200 characters (TSLint)
+- **Arrow functions**: No parentheses for single parameters (`x => x + 1`)
+- **Trailing commas**: Required for multiline objects and arrays (ES5 compatible)
+
+### TypeScript Guidelines
+
+- Enable strict null checks and no implicit any
+- Use TypeScript interfaces for data structures
+- Prefer `const` over `let`, avoid `var`
+- Use type inference when possible, explicit types when clarity is needed
+
+## Dependency Management
+
+### Adding Dependencies
+
+```bash
+# Add to root project
+yarn add <package-name>
+
+# Add to app (frontend)
+cd app && yarn add <package-name>
+
+# Add to backend
+cd backend && yarn add <package-name>
+
+# Add dev dependencies
+yarn add -D <package-name>
+```
+
+### Important Dependency Notes
+
+- Main dependencies are in the root `package.json`
+- Frontend React app has its own dependencies in `app/package.json`
+- Backend models and logic have dependencies in `backend/package.json`
+- Always use `--frozen-lockfile` in CI to ensure reproducible builds
+- Run `yarn install` after pulling changes that modify `yarn.lock`
+
+## Debugging
+
+### Development Mode
+
+```bash
+# Start with hot reload for frontend
+yarn dev
+
+# This runs two processes in parallel:
+# 1. webpack-dev-server for the React app (port varies)
+# 2. Electron in development mode with the --development flag
+```
+
+### Debugging TypeScript
+
+- Source maps are enabled in `tsconfig.json`
+- Use `ts-node` for running TypeScript files directly
+- Backend tests can be debugged with: `cd backend && yarn test-inspect`
+
+### Common Issues
+
+- **Build fails**: Clear `dist/` and `app/build/` directories, then rebuild
+- **Electron won't start**: Ensure `yarn build` completed successfully
+- **Tests fail**: Check if MQTT broker (mosquitto) is running for integration tests
+- **UI not updating**: In dev mode, ensure webpack-dev-server is running
+
+## Deployment and Packaging
+
+### Creating Releases
+
+```bash
+# Prepare release (updates version, changelog)
+yarn prepare-release
+
+# Package the application for distribution
+yarn package
+
+# Package with Docker (for consistent builds)
+yarn package-with-docker
+```
+
+### Release Workflow
+
+- **Beta releases**: Create PR to `beta` branch with "feat:" or "fix:" commits
+- **Production releases**: Create PR to `release` branch with "feat:" or "fix:" commits
+- Semantic release automatically handles versioning and changelog
+- Builds are created for Windows, macOS, and Linux
+
+### Build Artifacts
+
+- Output directory: `build/`
+- Supported formats: DMG (macOS), EXE/NSIS (Windows), AppImage/Snap (Linux), AppX (Windows Store)
+- Code signing is configured via `res/` directory certificates and provisioning profiles
+
 ## Important Notes

 - Always run `yarn build` before starting the application
 - The app uses Electron (see `package.json` for version)
 - MQTT communication is handled via [mqttjs](https://github.com/mqttjs/MQTT.js)
 - All code changes should pass linting (`yarn lint`)
+- Node.js version requirement: >= 20
+- The project uses workspace-like structure with separate package.json files for app and backend
@@ -22,7 +22,7 @@ jobs:
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}
      - name: Build and push
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@v6
        with:
          context: .
          push: true
@@ -14,7 +14,7 @@ jobs:
      - name: Setup Node.js
        uses: actions/setup-node@v4
        with:
-          node-version: '18'
+          node-version: '24'
      
      - name: Get yarn cache directory path
        id: yarn-cache-dir-path
@@ -28,14 +28,14 @@ jobs:
      - uses: actions/checkout@v4
      - uses: actions/setup-node@v4
        with:
-          node-version: 20
+          node-version: 24
      - run: npm install -g yarn
      - run: yarn
      - id: create_token # get ReleaseBot access token
-        uses: tibdex/github-app-token@v2
+        uses: actions/create-github-app-token@v1
        with:
-          app_id: ${{ secrets.RELEASE_BOT_APP_ID }}
-          private_key: ${{ secrets.RELEASE_BOT_PRIVATE_KEY }}
+          app-id: ${{ secrets.RELEASE_BOT_APP_ID }}
+          private-key: ${{ secrets.RELEASE_BOT_PRIVATE_KEY }}
      - name: Semantic Release
        uses: cycjimmy/semantic-release-action@v4
        id: semantic   # Need an `id` for output variables
@@ -12,13 +12,58 @@ jobs:
      options: --user root
    steps:
      - uses: actions/checkout@v4
+        with:
+          ref: ${{ github.event.pull_request.head.sha }}
      - name: Install Packages
        run: yarn install --frozen-lockfile
      - name: Build
        run: yarn build
      - name: Test
        run: yarn test
-      - name: UI-Test
+
+  ui-tests:
+    runs-on: ubuntu-latest
+    container:
+      image: ghcr.io/thomasnordquist/mqtt-explorer-ui-tests:latest
+      volumes:
+        - ./:/app
+      options: --user root
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          ref: ${{ github.event.pull_request.head.sha }}
+      - name: Install Packages
+        run: yarn install --frozen-lockfile
+      - name: Build
+        run: yarn build
+      - name: Run UI Tests
+        timeout-minutes: 10
+        run: ./scripts/runUiTests.sh
+      - name: Upload Test Screenshots
+        if: always()
+        uses: actions/upload-artifact@v4
+        with:
+          name: ui-test-screenshots
+          path: |
+            test-screenshot-*.png
+          retention-days: 30
+
+  demo-video:
+    runs-on: ubuntu-latest
+    container:
+      image: ghcr.io/thomasnordquist/mqtt-explorer-ui-tests:latest
+      volumes:
+        - ./:/app
+      options: --user root
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          ref: ${{ github.event.pull_request.head.sha }}
+      - name: Install Packages
+        run: yarn install --frozen-lockfile
+      - name: Build
+        run: yarn build
+      - name: Generate Demo Video
        run: yarn ui-test
      - name: Post-processing
        run: ./scripts/prepareVideo.sh
@@ -36,3 +81,55 @@ jobs:
        run: echo '${{ steps.upload.outputs.file-url }}'
        id: artifact-upload-step
      - run: echo '<picture><img src="${{ steps.upload.outputs.file-url }}"></picture>' >> $GITHUB_STEP_SUMMARY
+
+  test-browser:
+    runs-on: ubuntu-latest
+    services:
+      mosquitto:
+        image: eclipse-mosquitto:2
+        ports:
+          - 1883:1883
+        options: >-
+          --health-cmd "mosquitto_sub -t '$SYS/#' -C 1"
+          --health-interval 10s
+          --health-timeout 5s
+          --health-retries 5
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          ref: ${{ github.event.pull_request.head.sha }}
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '24'
+      - name: Install Dependencies
+        run: yarn install --frozen-lockfile
+      - name: Build Browser Mode
+        run: yarn build:server
+      - name: Test App
+        run: yarn test:app
+      - name: Test Backend
+        run: yarn test:backend
+      - name: Start Server in Background
+        run: |
+          yarn start:server &
+          echo $! > server.pid
+        env:
+          MQTT_EXPLORER_USERNAME: test
+          MQTT_EXPLORER_PASSWORD: test123
+          PORT: 3000
+      - name: Wait for Server
+        run: |
+          timeout 30 bash -c 'until curl -f http://localhost:3000; do sleep 1; done'
+      - name: Browser Smoke Test
+        run: |
+          # Test server is running
+          curl -f http://localhost:3000 || exit 1
+          echo "Browser mode server is running successfully"
+      - name: Stop Server
+        if: always()
+        run: |
+          if [ -f server.pid ]; then
+            kill $(cat server.pid) || true
+            rm server.pid
+          fi
@@ -11,7 +11,7 @@ jobs:
          ref: gh-pages
      - uses: actions/setup-node@v4
        with:
-          node-version: 20
+          node-version: '24'
      - run: npm install
      - run: npm run readme
      - uses: stefanzweifel/git-auto-commit-action@v5
@@ -14,3 +14,7 @@ screen*.png
 mqtt-explorer-mcp-screenshot.png
 screenshot-mcp-*.png
 test-mcp-introspection.js
+
+/data
+test-screenshot-*.png
+test-expand-*.png
@@ -0,0 +1,193 @@
+# Browser Mode Documentation
+
+MQTT Explorer now supports running as a web application served by a Node.js server, in addition to the existing Electron desktop app.
+
+## Running in Browser Mode
+
+### Quick Start
+
+1. Build the application for browser mode:
+   ```bash
+   yarn build:server
+   ```
+
+2. Start the server:
+   ```bash
+   yarn start:server
+   ```
+
+3. Open your browser and navigate to `http://localhost:3000`
+
+4. You'll be prompted to log in with credentials that were generated on server startup.
+
+### Development Mode
+
+To run in development mode with hot reload:
+
+```bash
+yarn dev:server
+```
+
+This starts both the webpack dev server and the backend server.
+
+## Authentication
+
+### Environment Variables
+
+You can set custom authentication credentials using environment variables:
+
+```bash
+export MQTT_EXPLORER_USERNAME=admin
+export MQTT_EXPLORER_PASSWORD=secretpassword
+yarn start:server
+```
+
+### Generated Credentials
+
+If no environment variables are set, the server will generate credentials on first startup and save them to `data/credentials.json`. The generated credentials will be printed to the console:
+
+```
+============================================================
+Generated new credentials:
+Username: user-abc123
+Password: 123e4567-e89b-12d3-a456-426614174000
+============================================================
+Please save these credentials. They will be persisted to:
+/path/to/data/credentials.json
+============================================================
+```
+
+## Features
+
+### Certificate Upload
+
+In browser mode, certificate files are uploaded directly through the browser using the HTML5 File API. The certificates are:
+- Read client-side as base64
+- Stored in the connection configuration
+- Used when establishing MQTT connections
+
+### Data Storage
+
+In browser mode, all data is stored on the server:
+- Credentials: `data/credentials.json`
+- Uploaded certificates: `data/certificates/`
+- File uploads: `data/uploads/`
+
+### Port Configuration
+
+The default port is 3000. You can change it using the `PORT` environment variable:
+
+```bash
+PORT=8080 yarn start:server
+```
+
+## Architecture
+
+### Client-Server Communication
+
+- **Electron Mode**: Uses Electron IPC for communication between renderer and main process
+- **Browser Mode**: Uses Socket.io WebSockets for real-time communication between browser and server
+
+The application automatically detects the environment and uses the appropriate transport layer.
+
+### Event Bus Abstraction
+
+Both Electron IPC and Socket.io implement the same `EventBusInterface`, allowing the application code to work seamlessly in both modes without modification.
+
+## Differences from Electron Mode
+
+### Browser Mode Limitations
+
+1. **File System Access**: Limited to server-side operations
+2. **Native Dialogs**: File selection uses browser file input instead of native dialogs
+3. **Auto-Updates**: Not available in browser mode
+4. **Tray Icon**: Not available in browser mode
+
+### Browser Mode Advantages
+
+1. **No Installation**: Access from any browser
+2. **Cross-Platform**: Works on any device with a modern browser
+3. **Remote Access**: Can be deployed on a server for remote access
+4. **Multi-User**: Can support authentication for multiple users
+
+## Security Considerations
+
+1. **HTTPS**: For production, always use HTTPS to encrypt credentials and MQTT data
+2. **Authentication**: Keep credentials secure and rotate them regularly
+3. **Network**: Ensure the server is on a trusted network or behind a firewall
+4. **Environment Variables**: Use environment variables for production credentials, not the generated ones
+
+## Deployment
+
+For production deployment:
+
+1. Build the application:
+   ```bash
+   yarn build:server
+   ```
+
+2. Set environment variables:
+   ```bash
+   export MQTT_EXPLORER_USERNAME=your_username
+   export MQTT_EXPLORER_PASSWORD=your_secure_password
+   export PORT=3000
+   ```
+
+3. Start the server:
+   ```bash
+   yarn start:server
+   ```
+
+4. Use a reverse proxy (nginx, Apache) to add HTTPS and additional security features
+
+## Troubleshooting
+
+### Debugging
+
+Enable detailed Socket.IO connection and lifecycle debugging:
+
+```bash
+DEBUG=mqtt-explorer:socketio* yarn start:server
+```
+
+Available debug namespaces:
+- `mqtt-explorer:socketio` - General Socket.IO events and metrics
+- `mqtt-explorer:socketio:connect` - Client connection events
+- `mqtt-explorer:socketio:disconnect` - Client disconnection and cleanup
+- `mqtt-explorer:socketio:subscriptions` - Subscription lifecycle tracking
+- `mqtt-explorer:socketio:connections` - MQTT connection ownership
+
+This will log:
+- Client connect/disconnect events
+- Subscription counts per socket
+- MQTT connection ownership tracking
+- Memory leak detection metrics (subscriptions, handlers, connections)
+
+Example output:
+```
+mqtt-explorer:socketio:connect Client connected: abc123de
+mqtt-explorer:socketio [connect] clients=1 subscriptions=8 mqttConns=0 | socket[abc123de]: subs=8 conns=0
+mqtt-explorer:socketio:connections Connection my-mqtt owned by socket abc123de (total: 1)
+mqtt-explorer:socketio:disconnect Client disconnected: abc123de
+mqtt-explorer:socketio:subscriptions Removed 8 subscriptions for socket abc123de
+mqtt-explorer:socketio [disconnect] clients=0 subscriptions=0 mqttConns=0 | socket[abc123de]: subs=0 conns=0
+```
+
+### Authentication Fails
+
+1. Check the console output for the generated credentials
+2. Clear browser session storage: `sessionStorage.clear()` in browser console
+3. Restart the server to regenerate credentials
+
+### Connection Issues
+
+1. Check that the server is running: `http://localhost:3000`
+2. Check browser console for Socket.io connection errors
+3. Verify firewall rules allow the port
+
+### Certificate Upload Issues
+
+In browser mode, certificates are handled differently:
+- Use the file upload button to select certificate files
+- Files are read and encoded client-side
+- Large certificate files (>16KB) will be rejected
@@ -0,0 +1,149 @@
+# CI/CD Pipeline Documentation
+
+## Overview
+
+MQTT Explorer uses GitHub Actions for continuous integration and testing. The pipeline tests both Electron (desktop) and browser modes.
+
+## Workflows
+
+### Test Workflow (`.github/workflows/tests.yml`)
+
+This workflow runs on pull requests to `master`, `beta`, and `release` branches.
+
+#### Jobs
+
+##### 1. `test` - Electron Mode Tests
+
+Tests the traditional Electron desktop application:
+
+- **Environment**: Custom Docker container (`ghcr.io/thomasnordquist/mqtt-explorer-ui-tests:latest`)
+- **Steps**:
+  1. Install dependencies with frozen lockfile
+  2. Build the Electron application
+  3. Run unit tests (app + backend)
+  4. Run UI tests with video recording
+  5. Upload test video to S3
+  6. Display test results in GitHub summary
+
+**Artifacts**: UI test video (GIF format) uploaded to S3
+
+##### 2. `test-browser` - Browser Mode Tests
+
+Tests the new browser/server mode:
+
+- **Environment**: Ubuntu latest with Node.js 20
+- **Services**:
+  - **Mosquitto MQTT Broker**: Eclipse Mosquitto v2 on port 1883
+    - Health checks enabled
+    - Anonymous connections allowed
+- **Steps**:
+  1. Setup Node.js 20
+  2. Install dependencies
+  3. Build browser mode (`yarn build:server`)
+  4. Run unit tests (app + backend)
+  5. Start server in background with test credentials
+  6. Wait for server to be ready
+  7. Run browser smoke tests
+  8. Clean up server process
+
+**Environment Variables**:
+- `MQTT_EXPLORER_USERNAME=test`
+- `MQTT_EXPLORER_PASSWORD=test123`
+- `PORT=3000`
+
+## Test Commands
+
+The following npm scripts are used in CI/CD:
+
+```bash
+# Unit tests
+yarn test              # Run all tests (app + backend)
+yarn test:app          # Frontend tests only
+yarn test:backend      # Backend tests only
+
+# Build
+yarn build             # Build Electron mode
+yarn build:server      # Build browser mode
+
+# UI Tests (Electron only)
+yarn ui-test           # Run UI tests with video recording
+```
+
+## Adding New Tests
+
+### For Electron Mode
+
+Add tests to the `test` job. UI tests should be added to the test suite that `yarn ui-test` runs.
+
+### For Browser Mode
+
+Browser-specific tests should:
+1. Use the pre-configured Mosquitto service
+2. Connect to `mqtt://mosquitto:1883`
+3. Test server endpoints at `http://localhost:3000`
+
+Example:
+```yaml
+- name: Browser Integration Test
+  run: |
+    # Test MQTT connection through server
+    curl -X POST http://localhost:3000/api/test
+```
+
+## Local Testing
+
+### Electron Mode
+
+```bash
+yarn build
+yarn test
+yarn ui-test
+```
+
+### Browser Mode
+
+```bash
+# Start Mosquitto in Docker
+docker run -d -p 1883:1883 eclipse-mosquitto:2
+
+# Build and test
+yarn build:server
+yarn test
+
+# Start server
+MQTT_EXPLORER_USERNAME=test MQTT_EXPLORER_PASSWORD=test123 yarn start:server
+
+# Run manual tests
+curl http://localhost:3000
+```
+
+## GitHub Codespaces / Devcontainer
+
+The repository includes a devcontainer configuration that automatically sets up:
+- Node.js 20
+- MQTT broker (Mosquitto)
+- All development dependencies
+- Port forwarding for development
+
+See [.devcontainer/README.md](.devcontainer/README.md) for details.
+
+## Troubleshooting
+
+### Browser Tests Failing
+
+1. **Server won't start**: Check if port 3000 is already in use
+2. **MQTT connection fails**: Ensure Mosquitto service is healthy
+3. **Timeout errors**: Increase timeout in "Wait for Server" step
+
+### Electron Tests Failing
+
+1. **UI tests timeout**: Check if the Docker container has display access
+2. **Build fails**: Verify all dependencies are in yarn.lock
+
+## Future Improvements
+
+- [ ] Add E2E browser tests with Playwright
+- [ ] Test WebSocket connections in browser mode
+- [ ] Add performance benchmarks
+- [ ] Test with different MQTT broker versions
+- [ ] Add security scanning for browser mode
@@ -1,4 +1,4 @@
-FROM node:20
+FROM node:24

 RUN DEBIAN_FRONTEND="noninteractive" apt-get update \
  && apt-get install -y --no-install-recommends ca-certificates nano ffmpeg xvfb git-core tmux locales mosquitto x11vnc
@@ -1,4 +1,6 @@
-# Creative Commons Attribution-NonCommercial 4.0 International
+When redistributing, the attribution page may not be altered or made less accessible without explicit approval.
+
+# Creative Commons Attribution-ShareAlike 4.0 International

 Creative Commons Corporation (“Creative Commons”) is not a law firm and does not provide legal services or legal advice. Distribution of Creative Commons public licenses does not create a lawyer-client or other relationship. Creative Commons makes its licenses and related information available on an “as-is” basis. Creative Commons gives no warranties regarding its licenses, any material licensed under their terms and conditions, or any related information. Creative Commons disclaims all liability for damages resulting from their use to the fullest extent possible.

@@ -10,9 +12,9 @@ Creative Commons public licenses provide a standard set of terms and conditions

 * __Considerations for the public:__ By using one of our public licenses, a licensor grants the public permission to use the licensed material under specified terms and conditions. If the licensor’s permission is not necessary for any reason–for example, because of any applicable exception or limitation to copyright–then that use is not regulated by the license. Our licenses grant only permissions under copyright and certain other rights that a licensor has authority to grant. Use of the licensed material may still be restricted for other reasons, including because others have copyright or other rights in the material. A licensor may make special requests, such as asking that all changes be marked or described. Although not required by our licenses, you are encouraged to respect those requests where reasonable. [More considerations for the public](http://wiki.creativecommons.org/Considerations_for_licensors_and_licensees#Considerations_for_licensees).

-## Creative Commons Attribution-NonCommercial 4.0 International Public License
+## Creative Commons Attribution-ShareAlike 4.0 International Public License

-By exercising the Licensed Rights (defined below), You accept and agree to be bound by the terms and conditions of this Creative Commons Attribution-NonCommercial 4.0 International Public License ("Public License"). To the extent this Public License may be interpreted as a contract, You are granted the Licensed Rights in consideration of Your acceptance of these terms and conditions, and the Licensor grants You such rights in consideration of benefits the Licensor receives from making the Licensed Material available under these terms and conditions.
+By exercising the Licensed Rights (defined below), You accept and agree to be bound by the terms and conditions of this Creative Commons Attribution-ShareAlike 4.0 International Public License ("Public License"). To the extent this Public License may be interpreted as a contract, You are granted the Licensed Rights in consideration of Your acceptance of these terms and conditions, and the Licensor grants You such rights in consideration of benefits the Licensor receives from making the Licensed Material available under these terms and conditions.

 ### Section 1 – Definitions.

@@ -20,25 +22,27 @@ a. __Adapted Material__ means material subject to Copyright and Similar Rights t

 b. __Adapter's License__ means the license You apply to Your Copyright and Similar Rights in Your contributions to Adapted Material in accordance with the terms and conditions of this Public License.

-c. __Copyright and Similar Rights__ means copyright and/or similar rights closely related to copyright including, without limitation, performance, broadcast, sound recording, and Sui Generis Database Rights, without regard to how the rights are labeled or categorized. For purposes of this Public License, the rights specified in Section 2(b)(1)-(2) are not Copyright and Similar Rights.
+c. __BY-SA Compatible License__ means a license listed at [creativecommons.org/compatiblelicenses](http://creativecommons.org/compatiblelicenses), approved by Creative Commons as essentially the equivalent of this Public License.

-d. __Effective Technological Measures__ means those measures that, in the absence of proper authority, may not be circumvented under laws fulfilling obligations under Article 11 of the WIPO Copyright Treaty adopted on December 20, 1996, and/or similar international agreements.
+d. __Copyright and Similar Rights__ means copyright and/or similar rights closely related to copyright including, without limitation, performance, broadcast, sound recording, and Sui Generis Database Rights, without regard to how the rights are labeled or categorized. For purposes of this Public License, the rights specified in Section 2(b)(1)-(2) are not Copyright and Similar Rights.

-e. __Exceptions and Limitations__ means fair use, fair dealing, and/or any other exception or limitation to Copyright and Similar Rights that applies to Your use of the Licensed Material.
+e. __Effective Technological Measures__ means those measures that, in the absence of proper authority, may not be circumvented under laws fulfilling obligations under Article 11 of the WIPO Copyright Treaty adopted on December 20, 1996, and/or similar international agreements.

-f. __Licensed Material__ means the artistic or literary work, database, or other material to which the Licensor applied this Public License.
+f. __Exceptions and Limitations__ means fair use, fair dealing, and/or any other exception or limitation to Copyright and Similar Rights that applies to Your use of the Licensed Material.

-g. __Licensed Rights__ means the rights granted to You subject to the terms and conditions of this Public License, which are limited to all Copyright and Similar Rights that apply to Your use of the Licensed Material and that the Licensor has authority to license.
+g. __License Elements__ means the license attributes listed in the name of a Creative Commons Public License. The License Elements of this Public License are Attribution and ShareAlike.

-h. __Licensor__ means the individual(s) or entity(ies) granting rights under this Public License.
+h. __Licensed Material__ means the artistic or literary work, database, or other material to which the Licensor applied this Public License.

-i. __NonCommercial__ means not primarily intended for or directed towards commercial advantage or monetary compensation. For purposes of this Public License, the exchange of the Licensed Material for other material subject to Copyright and Similar Rights by digital file-sharing or similar means is NonCommercial provided there is no payment of monetary compensation in connection with the exchange.
+i. __Licensed Rights__ means the rights granted to You subject to the terms and conditions of this Public License, which are limited to all Copyright and Similar Rights that apply to Your use of the Licensed Material and that the Licensor has authority to license.

-j. __Share__ means to provide material to the public by any means or process that requires permission under the Licensed Rights, such as reproduction, public display, public performance, distribution, dissemination, communication, or importation, and to make material available to the public including in ways that members of the public may access the material from a place and at a time individually chosen by them.
+j. __Licensor__ means the individual(s) or entity(ies) granting rights under this Public License.

-k. __Sui Generis Database Rights__ means rights other than copyright resulting from Directive 96/9/EC of the European Parliament and of the Council of 11 March 1996 on the legal protection of databases, as amended and/or succeeded, as well as other essentially equivalent rights anywhere in the world.
+k. __Share__ means to provide material to the public by any means or process that requires permission under the Licensed Rights, such as reproduction, public display, public performance, distribution, dissemination, communication, or importation, and to make material available to the public including in ways that members of the public may access the material from a place and at a time individually chosen by them.

-l. __You__ means the individual or entity exercising the Licensed Rights under this Public License. __Your__ has a corresponding meaning.
+l. __Sui Generis Database Rights__ means rights other than copyright resulting from Directive 96/9/EC of the European Parliament and of the Council of 11 March 1996 on the legal protection of databases, as amended and/or succeeded, as well as other essentially equivalent rights anywhere in the world.
+
+m. __You__ means the individual or entity exercising the Licensed Rights under this Public License. __Your__ has a corresponding meaning.

 ### Section 2 – Scope.

@@ -46,9 +50,9 @@ a. ___License grant.___

   1. Subject to the terms and conditions of this Public License, the Licensor hereby grants You a worldwide, royalty-free, non-sublicensable, non-exclusive, irrevocable license to exercise the Licensed Rights in the Licensed Material to:

-       A. reproduce and Share the Licensed Material, in whole or in part, for NonCommercial purposes only; and
+       A. reproduce and Share the Licensed Material, in whole or in part; and

-       B. produce, reproduce, and Share Adapted Material for NonCommercial purposes only.
+       B. produce, reproduce, and Share Adapted Material.

   2. __Exceptions and Limitations.__ For the avoidance of doubt, where Exceptions and Limitations apply to Your use, this Public License does not apply, and You do not need to comply with its terms and conditions.

@@ -58,9 +62,11 @@ a. ___License grant.___

   5. __Downstream recipients.__

-        A. __Offer from the Licensor – Licensed Material.__ Every recipient of the Licensed Material automatically receives an offer from the Licensor to exercise the Licensed Rights under the terms and conditions of this Public License.
+       A. __Offer from the Licensor – Licensed Material.__ Every recipient of the Licensed Material automatically receives an offer from the Licensor to exercise the Licensed Rights under the terms and conditions of this Public License.

-        B. __No downstream restrictions.__ You may not offer or impose any additional or different terms or conditions on, or apply any Effective Technological Measures to, the Licensed Material if doing so restricts exercise of the Licensed Rights by any recipient of the Licensed Material.
+       B. __Additional offer from the Licensor – Adapted Material.__ Every recipient of Adapted Material from You automatically receives an offer from the Licensor to exercise the Licensed Rights in the Adapted Material under the conditions of the Adapter’s License You apply.
+
+       C. __No downstream restrictions.__ You may not offer or impose any additional or different terms or conditions on, or apply any Effective Technological Measures to, the Licensed Material if doing so restricts exercise of the Licensed Rights by any recipient of the Licensed Material.

   6. __No endorsement.__ Nothing in this Public License constitutes or may be construed as permission to assert or imply that You are, or that Your use of the Licensed Material is, connected with, or sponsored, endorsed, or granted official status by, the Licensor or others designated to receive attribution as provided in Section 3(a)(1)(A)(i).

@@ -70,7 +76,7 @@ b. ___Other rights.___

   2. Patent and trademark rights are not licensed under this Public License.

-   3. To the extent possible, the Licensor waives any right to collect royalties from You for the exercise of the Licensed Rights, whether directly or through a collecting society under any voluntary or waivable statutory or compulsory licensing scheme. In all other cases the Licensor expressly reserves any right to collect such royalties, including when the Licensed Material is used other than for NonCommercial purposes.
+   3. To the extent possible, the Licensor waives any right to collect royalties from You for the exercise of the Licensed Rights, whether directly or through a collecting society under any voluntary or waivable statutory or compulsory licensing scheme. In all other cases the Licensor expressly reserves any right to collect such royalties.

 ### Section 3 – License Conditions.

@@ -100,15 +106,23 @@ a. ___Attribution.___

   3. If requested by the Licensor, You must remove any of the information required by Section 3(a)(1)(A) to the extent reasonably practicable.

-   4. If You Share Adapted Material You produce, the Adapter's License You apply must not prevent recipients of the Adapted Material from complying with this Public License.
+b. ___ShareAlike.___
+
+In addition to the conditions in Section 3(a), if You Share Adapted Material You produce, the following conditions also apply.
+
+1. The Adapter’s License You apply must be a Creative Commons license with the same License Elements, this version or later, or a BY-SA Compatible License.
+
+2. You must include the text of, or the URI or hyperlink to, the Adapter's License You apply. You may satisfy this condition in any reasonable manner based on the medium, means, and context in which You Share Adapted Material.
+
+3. You may not offer or impose any additional or different terms or conditions on, or apply any Effective Technological Measures to, Adapted Material that restrict exercise of the rights granted under the Adapter's License You apply.

 ### Section 4 – Sui Generis Database Rights.

 Where the Licensed Rights include Sui Generis Database Rights that apply to Your use of the Licensed Material:

-a. for the avoidance of doubt, Section 2(a)(1) grants You the right to extract, reuse, reproduce, and Share all or a substantial portion of the contents of the database for NonCommercial purposes only;
+a. for the avoidance of doubt, Section 2(a)(1) grants You the right to extract, reuse, reproduce, and Share all or a substantial portion of the contents of the database;

-b. if You include all or a substantial portion of the database contents in a database in which You have Sui Generis Database Rights, then the database in which You have Sui Generis Database Rights (but not its individual contents) is Adapted Material; and
+b. if You include all or a substantial portion of the database contents in a database in which You have Sui Generis Database Rights, then the database in which You have Sui Generis Database Rights (but not its individual contents) is Adapted Material, including for purposes of Section 3(b); and

 c. You must comply with the conditions in Section 3(a) if You Share all or a substantial portion of the contents of the database.

@@ -154,7 +168,6 @@ c. No term or condition of this Public License will be waived and no failure to

 d. Nothing in this Public License constitutes or may be interpreted as a limitation upon, or waiver of, any privileges and immunities that apply to the Licensor or You, including from the legal processes of any jurisdiction or authority.

-> Creative Commons is not a party to its public licenses. Notwithstanding, Creative Commons may elect to apply one of its public licenses to material it publishes and in those instances will be considered the “Licensor.” Except for the limited purpose of indicating that material is shared under a Creative Commons public license or as otherwise permitted by the Creative Commons policies published at [creativecommons.org/policies](http://creativecommons.org/policies), Creative Commons does not authorize the use of the trademark “Creative Commons” or any other trademark or logo of Creative Commons without its prior written consent including, without limitation, in connection with any unauthorized modifications to any of its public licenses or any other arrangements, understandings, or agreements concerning use of licensed material. For the avoidance of doubt, this paragraph does not form part of the public licenses.
+> Creative Commons is not a party to its public licenses. Notwithstanding, Creative Commons may elect to apply one of its public licenses to material it publishes and in those instances will be considered the “Licensor.” The text of the Creative Commons public licenses is dedicated to the public domain under the [CC0 Public Domain Dedication](https://creativecommons.org/publicdomain/zero/1.0/legalcode). Except for the limited purpose of indicating that material is shared under a Creative Commons public license or as otherwise permitted by the Creative Commons policies published at [creativecommons.org/policies](http://creativecommons.org/policies), Creative Commons does not authorize the use of the trademark “Creative Commons” or any other trademark or logo of Creative Commons without its prior written consent including, without limitation, in connection with any unauthorized modifications to any of its public licenses or any other arrangements, understandings, or agreements concerning use of licensed material. For the avoidance of doubt, this paragraph does not form part of the public licenses.
 >
-> Creative Commons may be contacted at creativecommons.org
-
+> Creative Commons may be contacted at creativecommons.org.
@@ -18,8 +18,22 @@ Downloads can be found at the link above.
 This page is dedicated to its development.
 Pull-Requests and error reports are welcome.

+## Quick Start with GitHub Codespaces
+
+The fastest way to start developing is with GitHub Codespaces:
+
+1. Click the green "Code" button above
+2. Select "Codespaces" tab
+3. Click "Create codespace on [branch]"
+4. Wait for the environment to set up (includes Node.js and MQTT broker)
+5. Run `yarn dev:server` to start development
+
+The devcontainer includes a pre-configured MQTT broker and all development tools. See [.devcontainer/README.md](.devcontainer/README.md) for details.
+
 ## Run from sources

+### Desktop Application (Electron)
+
 ```bash
 npm install -g yarn
 yarn
@@ -27,8 +41,23 @@ yarn build
 yarn start
 ```

+### Browser Mode (Web Application)
+
+MQTT Explorer can also run as a web application served by a Node.js server:
+
+```bash
+npm install -g yarn
+yarn
+yarn build:server
+yarn start:server
+```
+
+Then open your browser to `http://localhost:3000`. For more details, see [BROWSER_MODE.md](BROWSER_MODE.md).
+
 ## Develop

+### Desktop Application
+
 Launch Application

 ```bash
@@ -37,32 +66,49 @@ yarn
 yarn dev
 ```

+### Browser Mode
+
+Launch in development mode with hot reload:
+
+```bash
+npm install -g yarn
+yarn
+yarn dev:server
+```
+
 The `app` directory contains all the rendering logic, the `backend` directory currently contains the models, tests, connection management, `src` contains all the electron bindings. [mqttjs](https://github.com/mqttjs/MQTT.js) is used to facilitate communication to MQTT brokers.

 ## Automated Tests

-To achieve a reliable product automated tests run regularly on travis.
+To achieve a reliable product automated tests run regularly on CI.

- Data model
- MQTT integration
- UI-Tests (The demo is a recorded ui test)
+- **Data model tests**: `yarn test:backend`
+- **App tests**: `yarn test:app`
+- **UI test suite**: `yarn test:ui` (independent, deterministic tests)
+- **Demo video**: `yarn ui-test` (UI test recording for documentation)

-## Run UI-tests
+### Run UI Test Suite

-A [mosquitto](https://mosquitto.org/) MQTT broker is required to run the ui-tests.
-
-Run tests with
+The UI test suite validates core functionality through automated browser tests. Each test is independent and deterministic.

 ```bash
-# Run chromedriver in a separate terminal session
-./node_modules/.bin/chromedriver --url-base=wd/hub --port=9515 --verbose
+# Run with automated setup (recommended)
+./scripts/runUiTests.sh
+
+# Or run directly (requires manual MQTT broker setup)
+yarn build
+yarn test:ui
 ```

-Compile and execute tests
+See [docs/UI-TEST-SUITE.md](docs/UI-TEST-SUITE.md) for more details.
+
+### Run Demo Video Generation
+
+A [mosquitto](https://mosquitto.org/) MQTT broker is required to generate the demo video.

 ```bash
-npm run build
-node dist/src/spec/webdriverio.js
+yarn build
+yarn ui-test
 ```

 ## Create a release
@@ -6,88 +6,95 @@
  "scripts": {
    "build": "webpack --mode production",
    "dev": "node_modules/.bin/webpack-dev-server --mode development --progress",
-    "test": "cross-env TS_NODE_PROJECT=test/tsconfig.json yarn mochatest",
-    "mochatest": "mocha --require ts-node/register --require source-map-support/register --recursive src/*/**/*.spec.ts"
+    "test": "mocha --require tsx --require source-map-support/register --recursive src/*/**/*.spec.ts",
+    "mochatest": "mocha --require tsx --require source-map-support/register --recursive src/*/**/*.spec.ts"
  },
  "engines": {
-    "node": ">=18"
+    "node": ">=20"
  },
  "author": "",
  "license": "CC-BY-ND-4.0",
  "dependencies": {
-    "@material-ui/core": "4.12",
-    "@material-ui/icons": "^4",
-    "@material-ui/lab": "^4.0.0-alpha",
-    "@material-ui/styles": "4.11",
-    "@types/react-transition-group": "^4",
+    "@emotion/react": "^11.14.0",
+    "@emotion/styled": "^11.14.0",
+    "@mui/icons-material": "^5.18.0",
+    "@mui/lab": "^5.0.0-alpha.177",
+    "@mui/material": "^5.18.0",
+    "@mui/styles": "^6.4.8",
+    "@types/react-transition-group": "^4.4.11",
    "ace-builds": "^1.4.11",
-    "axios": "^0.28.0",
-    "compare-versions": "^3.5.0",
-    "copy-text-to-clipboard": "^2.1.0",
-    "d3": "^5.9.7",
-    "d3-shape": "^1.3.5",
-    "diff": "^4.0.1",
-    "dot-prop": "^5.0.0",
+    "axios": "^1.13.2",
+    "compare-versions": "^6.1.1",
+    "copy-text-to-clipboard": "^3.2.0",
+    "d3": "^7.9.0",
+    "d3-shape": "^3.2.0",
+    "diff": "^7.0.0",
+    "dot-prop": "^5.3.0",
+    "events": "^3.3.0",
    "get-value": "^3.0.1",
-    "immutable": "^4.0.0-rc.12",
+    "immutable": "^4.3.7",
    "in-viewport": "^3.6.0",
-    "js-base64": "^2.5.1",
+    "js-base64": "^3.7.8",
    "json-to-ast": "^2.1.0",
    "lodash.debounce": "^4.0.8",
    "lodash.throttle": "^4.1.1",
    "moving-average": "^1.0.0",
    "number-abbreviate": "^2.0.0",
+    "os-browserify": "^0.3.0",
    "parse-duration": "^0.1.1",
-    "prismjs": "^1.15.0",
-    "react": "^16.11",
-    "react-ace": "^8",
-    "react-dom": "^16.7.0",
-    "react-redux": "^7.0.3",
-    "react-resize-detector": "^4.1.4",
-    "react-split-pane": "^0.1.85",
-    "react-transition-group": "^4",
-    "react-vis": "^1.11.6",
-    "redux": "^4.0.1",
-    "redux-batched-actions": "0.5",
-    "redux-thunk": "^2.3.0",
+    "path-browserify": "^1.0.1",
+    "prismjs": "^1.29.0",
+    "react": "^18.3.1",
+    "react-ace": "^12.0.0",
+    "react-dom": "^18.3.1",
+    "react-redux": "^9.2.0",
+    "react-resize-detector": "^11.0.1",
+    "react-split-pane": "^0.1.92",
+    "react-transition-group": "^4.4.5",
+    "react-vis": "^1.12.1",
+    "redux": "^5.0.1",
+    "redux-batched-actions": "^0.5.0",
+    "redux-thunk": "^3.1.0",
    "sha1": "^1.1.1",
-    "socket.io-client": "^2.2.0",
-    "uuid": "7"
+    "socket.io-client": "^4.8.1",
+    "url": "^0.11.4",
+    "uuid": "^11.0.0"
  },
  "devDependencies": {
-    "@babel/runtime": "^7.17.2",
-    "@types/d3": "^5.7.2",
-    "@types/diff": "^4.0.1",
-    "@types/get-value": "^3.0.1",
-    "@types/node": "^12.7.8",
-    "@types/prismjs": "^1.9.1",
-    "@types/react": "^16.9.4",
-    "@types/react-dom": "^16.0.11",
-    "@types/react-redux": "^7.0.9",
-    "@types/react-resize-detector": "^4.0.1",
+    "@babel/runtime": "^7.28.4",
+    "@types/d3": "^7.4.3",
+    "@types/diff": "^7.0.0",
+    "@types/get-value": "^3.0.5",
+    "@types/lodash.debounce": "^4.0.9",
+    "@types/node": "^25.0.3",
+    "@types/prismjs": "^1.26.5",
+    "@types/react": "^18.3.18",
+    "@types/react-dom": "^18.3.5",
+    "@types/react-redux": "^7.1.34",
+    "@types/react-resize-detector": "^4.0.3",
    "@types/sha1": "^1.1.1",
-    "@types/socket.io-client": "^1.4.32",
-    "@types/uuid": "^7.0.2",
-    "@types/vis": "^4.21.9",
-    "chai": "^4.2.0",
-    "cross-env": "^7.0.2",
-    "css-loader": "^3.0.0",
+    "@types/socket.io-client": "^3.0.0",
+    "@types/uuid": "^11.0.0",
+    "@types/vis": "^4.21.24",
+    "chai": "^4.5.0",
+    "cross-env": "^7.0.3",
+    "css-loader": "^7.1.2",
    "file-loader": "^6.2.0",
-    "html-webpack-plugin": "^5.5.0",
+    "html-webpack-plugin": "^5.6.3",
    "lodash": "^4.17.21",
-    "mocha": "^10.4.0",
-    "moment": "^2.29.1",
-    "node-loader": "^0.6.0",
-    "source-map-loader": "^0.2.4",
-    "style-loader": "^1",
+    "mocha": "^10.8.2",
+    "moment": "^2.30.1",
+    "node-loader": "^2.0.0",
+    "source-map-loader": "^5.0.0",
+    "style-loader": "^4.0.0",
    "ts-loader": "^9.5.1",
-    "typescript": "^4.5.5",
-    "webpack": "^5.91.0",
-    "webpack-bundle-analyzer": "^4.5.0",
-    "webpack-cli": "^5.1.4",
-    "webpack-dev-server": "^5.0.4"
+    "typescript": "^5.9.3",
+    "webpack": "^5.98.0",
+    "webpack-bundle-analyzer": "^4.10.2",
+    "webpack-cli": "^6.0.1",
+    "webpack-dev-server": "^5.2.0"
  },
  "peerDependencies": {
-    "electron": "^29"
+    "electron": "^39"
  }
 }
@@ -14,26 +14,27 @@ export const setTopic = (topic?: string): Action => {
  }
 }

-export const openFile = (encoding: 'utf8' = 'utf8') => async (dispatch: Dispatch<any>, getState: () => AppState) => {
-  try {
-    const file = await getFileContent(encoding)
-    if (file) {
-      dispatch(
-        setPayload(file.data))
+export const openFile =
+  (encoding: BufferEncoding = 'utf8') =>
+  async (dispatch: Dispatch<any>, getState: () => AppState) => {
+    try {
+      const file = await getFileContent(encoding)
+      if (file) {
+        dispatch(setPayload(file.data))
+      }
+    } catch (error) {
+      dispatch(showError(error))
    }
-  } catch (error) {
-    dispatch(showError(error))
  }
-}

 type FileParameters = {
-  name: string,
+  name: string
  data: string
 }
-async function getFileContent(encoding: string): Promise<FileParameters | undefined> {
+async function getFileContent(encoding: BufferEncoding): Promise<FileParameters | undefined> {
  const rejectReasons = {
    noFileSelected: 'No file selected',
-    errorReadingFile: 'Error reading file'
+    errorReadingFile: 'Error reading file',
  }

  const { canceled, filePaths } = await rendererRpc.call(makeOpenDialogRpc(), {
@@ -10,6 +10,12 @@ import { globalActions } from './'
 import { showError } from './Global'
 import { showTree } from './Tree'
 import { TopicViewModel } from '../model/TopicViewModel'
+import { backendEvents } from '../../../events'
+import {
+  Events,
+  MAX_MESSAGE_SIZE_UNLIMITED,
+  MAX_MESSAGE_SIZE_DEFAULT,
+} from '../../../events/EventsV2'

 const settingsIdentifier: StorageIdentifier<Partial<SettingsStateModel>> = {
  id: 'Settings',
@@ -22,6 +28,9 @@ export const loadSettings = () => async (dispatch: Dispatch<any>, getState: () =
      settings: getState().settings.merge(settings),
      type: ActionTypes.SETTINGS_DID_LOAD_SETTINGS,
    })
+    // Emit the maxMessageSize to backend after loading settings
+    const maxMessageSize = getState().settings.get('maxMessageSize')
+    backendEvents.emit(Events.setMaxMessageSize, maxMessageSize)
  } catch (error) {
    dispatch(showError(error))
  }
@@ -29,11 +38,14 @@ export const loadSettings = () => async (dispatch: Dispatch<any>, getState: () =
 }

 export const storeSettings = () => async (dispatch: Dispatch<any>, getState: () => AppState) => {
+  const currentSettings = getState().settings.toJS()
  const settings = {
-    ...getState().settings.toJS(),
+    ...currentSettings,
    autoExpandLimit: undefined,
    topicFilter: undefined,
    visible: undefined,
+    // Don't persist unlimited - reset to default
+    maxMessageSize: currentSettings.maxMessageSize === MAX_MESSAGE_SIZE_UNLIMITED ? MAX_MESSAGE_SIZE_DEFAULT : currentSettings.maxMessageSize,
  }

  try {
@@ -169,3 +181,12 @@ export const toggleTheme = () => (dispatch: Dispatch<any>, getState: () => AppSt
  })
  dispatch(storeSettings())
 }
+
+export const setMaxMessageSize = (maxMessageSize: number) => (dispatch: Dispatch<any>) => {
+  dispatch({
+    maxMessageSize,
+    type: ActionTypes.SETTINGS_SET_MAX_MESSAGE_SIZE,
+  })
+  dispatch(storeSettings())
+  backendEvents.emit(Events.setMaxMessageSize, maxMessageSize)
+}
@@ -7,7 +7,7 @@ import { batchActions } from 'redux-batched-actions'
 import { globalActions } from './'
 import { setTopic } from './Publish'
 import { TopicViewModel } from '../model/TopicViewModel'
-const debounce = require('lodash.debounce')
+import debounce from 'lodash.debounce'
 export { clearTopic } from './clearTopic'

 export { moveSelectionUpOrDownwards, moveInward, moveOutward } from './visibleTreeTraversal'
@@ -1,6 +1,6 @@
 import ConfirmationDialog from './ConfirmationDialog'
 import ConnectionSetup from './ConnectionSetup/ConnectionSetup'
-import CssBaseline from '@material-ui/core/CssBaseline'
+import CssBaseline from '@mui/material/CssBaseline'
 import ErrorBoundary from './ErrorBoundary'
 import Notification from './Layout/Notification'
 import React from 'react'
@@ -11,7 +11,8 @@ import { bindActionCreators } from 'redux'
 import { ConfirmationRequest } from '../reducers/Global'
 import { connect } from 'react-redux'
 import { globalActions, settingsActions } from '../actions'
-import { Theme, withStyles } from '@material-ui/core/styles'
+import { Theme } from '@mui/material/styles'
+import { withStyles } from '@mui/styles'
 ;(window as any).global = window

 const Settings = React.lazy(() => import('./SettingsDrawer/Settings'))
@@ -0,0 +1,64 @@
+import * as React from 'react'
+import { LoginDialog } from './LoginDialog'
+
+interface BrowserAuthWrapperProps {
+  children: React.ReactNode
+}
+
+const isBrowserMode =
+  typeof window !== 'undefined' && (typeof process === 'undefined' || process.env?.BROWSER_MODE === 'true')
+
+export function BrowserAuthWrapper(props: BrowserAuthWrapperProps) {
+  const [isAuthenticated, setIsAuthenticated] = React.useState(false)
+  const [loginError, setLoginError] = React.useState<string | undefined>()
+  const [showLogin, setShowLogin] = React.useState(false)
+
+  React.useEffect(() => {
+    if (!isBrowserMode) {
+      // Not in browser mode, skip authentication
+      setIsAuthenticated(true)
+      return
+    }
+
+    // Check if already authenticated
+    const username = sessionStorage.getItem('mqtt-explorer-username')
+    const password = sessionStorage.getItem('mqtt-explorer-password')
+
+    if (username && password) {
+      // Try to use stored credentials
+      setIsAuthenticated(true)
+    } else {
+      // Show login dialog
+      setShowLogin(true)
+    }
+  }, [])
+
+  const handleLogin = async (username: string, password: string) => {
+    try {
+      // Store credentials in session storage
+      sessionStorage.setItem('mqtt-explorer-username', username)
+      sessionStorage.setItem('mqtt-explorer-password', password)
+
+      // The socket will use these credentials on next connection
+      setIsAuthenticated(true)
+      setShowLogin(false)
+      setLoginError(undefined)
+
+      // Reload to reinitialize socket with new auth
+      window.location.reload()
+    } catch (error) {
+      setLoginError('Login failed. Please check your credentials.')
+    }
+  }
+
+  if (!isBrowserMode) {
+    // Not in browser mode, render children directly
+    return <>{props.children}</>
+  }
+
+  if (!isAuthenticated) {
+    return <LoginDialog open={showLogin} onLogin={handleLogin} error={loginError} />
+  }
+
+  return <>{props.children}</>
+}
@@ -1,14 +1,13 @@
 import DateFormatter from '../helper/DateFormatter'
 import NoData from './NoData'
 import NumberFormatter from '../helper/NumberFormatter'
-import React, { memo, useCallback } from 'react'
+import React, { memo, useCallback, useRef, useEffect } from 'react'
 import TooltipComponent from './TooltipComponent'
-import { default as ReactResizeDetector } from 'react-resize-detector'
-import { emphasize } from '@material-ui/core/styles'
+import { useResizeDetector } from 'react-resize-detector'
+import { emphasize, useTheme } from '@mui/material/styles'
 import { mapCurveType } from './mapCurveType'
 import { PlotCurveTypes } from '../../reducers/Charts'
 import { Point, Tooltip } from './Model'
-import { Theme, withTheme } from '@material-ui/core'
 import { useCustomXDomain } from './effects/useCustomXDomain'
 import { useCustomYDomain } from './effects/useCustomYDomain'
 import 'react-vis/dist/style.css'
@@ -17,89 +16,85 @@ const abbreviate = require('number-abbreviate')

 export interface Props {
  data: Array<{ x: number; y: number }>
-  theme: Theme
  interpolation?: PlotCurveTypes
  range?: [number?, number?]
  timeRangeStart?: number
  color?: string
 }

-export default withTheme(
-  memo((props: Props) => {
-    const [width, setWidth] = React.useState(300)
-    const [tooltip, setTooltip] = React.useState<Tooltip | undefined>()
-    const detectResize = React.useCallback(newWidth => setWidth(newWidth), [])
+export default memo((props: Props) => {
+  const theme = useTheme()
+  const [tooltip, setTooltip] = React.useState<Tooltip | undefined>()
+  const { width = 300, ref } = useResizeDetector()

-    const hintFormatter = React.useCallback(
-      (point: any) => [
-        { title: <b>Time</b>, value: <DateFormatter timeFirst={true} date={new Date(point.x)} /> },
-        { title: <b>Value</b>, value: <NumberFormatter value={point.y} /> },
-        { title: <b>Raw</b>, value: <span>{point.y}</span> },
-      ],
-      []
-    )
+  const hintFormatter = React.useCallback(
+    (point: any) => [
+      { title: <b>Time</b>, value: <DateFormatter timeFirst={true} date={new Date(point.x)} /> },
+      { title: <b>Value</b>, value: <NumberFormatter value={point.y} /> },
+      { title: <b>Raw</b>, value: <span>{point.y}</span> },
+    ],
+    []
+  )

-    const onMouseLeave = React.useCallback(() => {
-      setTooltip(undefined)
-    }, [])
+  const onMouseLeave = React.useCallback(() => {
+    setTooltip(undefined)
+  }, [])

-    const showTooltip = React.useCallback((point: Point, something: { event: MouseEvent }) => {
-      if (!something) {
-        return
-      }
-      setTooltip({ point, value: hintFormatter(point), element: something.event.target as any })
-    }, [])
+  const showTooltip = React.useCallback((point: Point, something: { event: MouseEvent }) => {
+    if (!something) {
+      return
+    }
+    setTooltip({ point, value: hintFormatter(point), element: something.event.target as any })
+  }, [])

-    const paletteColor =
-      props.theme.palette.type === 'light' ? props.theme.palette.secondary.dark : props.theme.palette.primary.light
-    const color = props.color ? props.color : paletteColor
+  const paletteColor =
+    theme.palette.mode === 'light' ? theme.palette.secondary.dark : theme.palette.primary.light
+  const color = props.color ? props.color : paletteColor

-    const highlightSelectedPoint = useCallback(
-      (point: Point) => {
-        const highlight = tooltip && tooltip.point.x === point.x && tooltip.point.y === point.y
-        return highlight ? emphasize(color, 0.8) : color
-      },
-      [tooltip, color]
-    )
+  const highlightSelectedPoint = useCallback(
+    (point: Point) => {
+      const highlight = tooltip && tooltip.point.x === point.x && tooltip.point.y === point.y
+      return highlight ? emphasize(color, 0.8) : color
+    },
+    [tooltip, color]
+  )

-    const formatYAxis = useCallback((num: number) => abbreviate(num), [])
+  const formatYAxis = useCallback((num: number) => abbreviate(num), [])

-    const xDomain = useCustomXDomain(props)
-    const yDomain = useCustomYDomain(props)
+  const xDomain = useCustomXDomain(props)
+  const yDomain = useCustomYDomain(props)

-    const data = props.data
-    const hasData = data.length > 0
-    const dummyDomain = [-1, 1]
-    const dummyData = [{ x: -2, y: -2 }]
-    return (
-      <div>
-        <div style={{ height: '150px', width: '100%', position: 'relative' }}>
-          {data.length === 0 ? <NoData /> : null}
-          <XYPlot
-            width={width}
-            height={180}
-            yDomain={hasData ? yDomain : dummyDomain}
-            xDomain={hasData ? xDomain : dummyDomain}
-            onMouseLeave={onMouseLeave}
-          >
-            <HorizontalGridLines />
-            <YAxis width={45} tickFormat={formatYAxis} />
-            <LineMarkSeries
-              color={color}
-              colorType="literal"
-              getColor={highlightSelectedPoint}
-              onValueMouseOver={showTooltip}
-              size={3}
-              data={hasData ? data : dummyData}
-              curve={mapCurveType(props.interpolation)}
-            />
-            <Hint value={{ x: 0, y: 0 }} style={{ pointerEvents: 'none' }}>
-              <TooltipComponent tooltip={tooltip} theme={props.theme} />
-            </Hint>
-          </XYPlot>
-          <ReactResizeDetector handleWidth={true} onResize={detectResize} />
-        </div>
+  const data = props.data
+  const hasData = data.length > 0
+  const dummyDomain = [-1, 1]
+  const dummyData = [{ x: -2, y: -2 }]
+  return (
+    <div>
+      <div ref={ref} style={{ height: '150px', width: '100%', position: 'relative' }}>
+        {data.length === 0 ? <NoData /> : null}
+        <XYPlot
+          width={width || 300}
+          height={180}
+          yDomain={hasData ? yDomain : dummyDomain}
+          xDomain={hasData ? xDomain : dummyDomain}
+          onMouseLeave={onMouseLeave}
+        >
+          <HorizontalGridLines />
+          <YAxis width={45} tickFormat={formatYAxis} />
+          <LineMarkSeries
+            color={color}
+            colorType="literal"
+            getColor={highlightSelectedPoint}
+            onValueMouseOver={showTooltip}
+            size={3}
+            data={hasData ? data : dummyData}
+            curve={mapCurveType(props.interpolation)}
+          />
+          <Hint value={{ x: 0, y: 0 }} style={{ pointerEvents: 'none' }}>
+            <TooltipComponent tooltip={tooltip} />
+          </Hint>
+        </XYPlot>
      </div>
-    )
-  })
-)
+    </div>
+  )
+})
@@ -1,5 +1,5 @@
 import React, { memo } from 'react'
-import { Typography } from '@material-ui/core'
+import { Typography } from '@mui/material'

 function NoData() {
  return (
@@ -1,9 +1,10 @@
 import React, { memo } from 'react'
-import { fade } from '@material-ui/core/styles'
-import { Fade, Grow, Paper, Popper, Theme, Typography, withTheme } from '@material-ui/core'
+import { alpha as fade } from '@mui/material/styles'
+import { Fade, Grow, Paper, Popper, Typography, useTheme } from '@mui/material'
 import { Tooltip } from './Model'

-function TooltipComponent(props: { tooltip?: Tooltip; theme: Theme }) {
+function TooltipComponent(props: { tooltip?: Tooltip }) {
+  const theme = useTheme()
  const { tooltip } = props
  return (
    <Popper
@@ -26,9 +27,9 @@ function TooltipComponent(props: { tooltip?: Tooltip; theme: Theme }) {
                padding: '4px',
                marginTop: '-12px',
                backgroundColor: fade(
-                  props.theme.palette.type === 'light'
-                    ? props.theme.palette.background.paper
-                    : props.theme.palette.background.default,
+                  theme.palette.mode === 'light'
+                    ? theme.palette.background.paper
+                    : theme.palette.background.default,
                  0.7
                ),
              }}
@@ -56,4 +57,4 @@ function TooltipComponent(props: { tooltip?: Tooltip; theme: Theme }) {
  )
 }

-export default withTheme(memo(TooltipComponent))
+export default memo(TooltipComponent)
@@ -1,7 +1,7 @@
 import React, { useRef } from 'react'
-import Play from '@material-ui/icons/PlayArrow'
-import Pause from '@material-ui/icons/PauseCircleFilled'
-import Clear from '@material-ui/icons/Clear'
+import Play from '@mui/icons-material/PlayArrow'
+import Pause from '@mui/icons-material/PauseCircleFilled'
+import Clear from '@mui/icons-material/Clear'
 import CustomIconButton from '../helper/CustomIconButton'
 import { ChartParameters } from '../../reducers/Charts'
 import { SettingsButton } from './ChartSettings/SettingsButton'
@@ -3,7 +3,7 @@ import { bindActionCreators } from 'redux'
 import { chartActions } from '../../../actions'
 import { ChartParameters } from '../../../reducers/Charts'
 import { connect } from 'react-redux'
-import { Menu, MenuItem } from '@material-ui/core'
+import { Menu, MenuItem } from '@mui/material'
 import { colors as createColors } from './colors'

 function chartParametersForColor(chart: ChartParameters, color?: string) {
@@ -4,7 +4,7 @@ import { bindActionCreators } from 'redux'
 import { chartActions } from '../../../actions'
 import { ChartParameters, PlotCurveTypes } from '../../../reducers/Charts'
 import { connect } from 'react-redux'
-import { Menu, MenuItem, Typography } from '@material-ui/core'
+import { Menu, MenuItem, Typography } from '@mui/material'

 function chartParametersForAction(chart: ChartParameters, action: string) {
  return {
@@ -1,10 +1,10 @@
 import * as React from 'react'
-import ArrowUpward from '@material-ui/icons/ArrowUpward'
+import ArrowUpward from '@mui/icons-material/ArrowUpward'
 import { bindActionCreators } from 'redux'
 import { chartActions } from '../../../actions'
 import { ChartParameters } from '../../../reducers/Charts'
 import { connect } from 'react-redux'
-import { MenuItem, Typography, ListItemIcon } from '@material-ui/core'
+import { MenuItem, Typography, ListItemIcon } from '@mui/material'

 function MoveUp(props: { actions: { chart: typeof chartActions }; chart: ChartParameters; close: () => void }) {
  const moveUp = React.useCallback(() => {
@@ -1,6 +1,6 @@
 import React, { useCallback, useState, ChangeEvent, MouseEvent, useRef, useEffect, useMemo } from 'react'
 import { ChartParameters } from '../../../reducers/Charts'
-import { Menu, TextField, Typography } from '@material-ui/core'
+import { Menu, TextField, Typography } from '@mui/material'
 import { connect } from 'react-redux'
 import { bindActionCreators } from 'redux'
 import { chartActions } from '../../../actions'
@@ -1,7 +1,7 @@
 import * as React from 'react'
 import ChartSettings from '.'
 import CustomIconButton from '../../helper/CustomIconButton'
-import MoreVertIcon from '@material-ui/icons/Settings'
+import MoreVertIcon from '@mui/icons-material/Settings'
 import { ChartParameters } from '../../../reducers/Charts'

 export function SettingsButton(props: {
@@ -1,6 +1,6 @@
 import React, { memo } from 'react'
 import { ChartParameters } from '../../../reducers/Charts'
-import { Menu, MenuItem, TextField, Typography } from '@material-ui/core'
+import { Menu, MenuItem, TextField, Typography } from '@mui/material'
 import { connect } from 'react-redux'
 import { bindActionCreators } from 'redux'
 import { chartActions } from '../../../actions'
@@ -1,6 +1,6 @@
 import React, { ChangeEvent, MouseEvent, useCallback, useEffect, useMemo, useRef, useState } from 'react'
 import { bindActionCreators } from 'redux'
-import { Button, Menu, TextField, Typography } from '@material-ui/core'
+import { Button, Menu, TextField, Typography } from '@mui/material'
 import { chartActions } from '../../../actions'
 import { ChartParameters } from '../../../reducers/Charts'
 import { connect } from 'react-redux'
@@ -12,7 +12,7 @@ import {
  yellow,
  brown,
  blueGrey,
-} from '@material-ui/core/colors'
+} from '@mui/material/colors'

 export function colors() {
  function colorToInt(color: string): [number, number, number] {
@@ -1,17 +1,17 @@
-import BarChart from '@material-ui/icons/BarChart'
-import Clear from '@material-ui/icons/Refresh'
-import ColorLens from '@material-ui/icons/ColorLens'
+import BarChart from '@mui/icons-material/BarChart'
+import Clear from '@mui/icons-material/Refresh'
+import ColorLens from '@mui/icons-material/ColorLens'
 import ColorSettings from './ColorSettings'
 import InterpolationSettings from './InterpolationSettings'
 import MoveUp from './MoveUp'
-import MultilineChart from '@material-ui/icons/MultilineChart'
+import MultilineChart from '@mui/icons-material/MultilineChart'
 import RangeSettings from './RangeSettings'
 import React, { memo } from 'react'
 import Size from './Size'
-import Sort from '@material-ui/icons/Sort'
+import Sort from '@mui/icons-material/Sort'
 import TimeRangeSettings from './TimeRangeSettings'
 import { ChartParameters } from '../../../reducers/Charts'
-import { Menu, MenuItem, ListItemIcon, Typography } from '@material-ui/core'
+import { Menu, MenuItem, ListItemIcon, Typography } from '@mui/material'

 function ChartSettings(props: {
  open: boolean
@@ -1,6 +1,8 @@
 import * as React from 'react'
 import { ChartParameters } from '../../reducers/Charts'
-import { Typography, Theme, withStyles } from '@material-ui/core'
+import { Typography } from '@mui/material'
+import { withStyles } from '@mui/styles'
+import { Theme } from '@mui/material/styles'

 function ChartTitle(props: { parameters: ChartParameters; classes: any }) {
  const { classes, parameters } = props
@@ -7,7 +7,7 @@ import { ChartActions } from './ChartActions'
 import { chartActions } from '../../actions'
 import { ChartParameters } from '../../reducers/Charts'
 import { connect } from 'react-redux'
-import { Paper } from '@material-ui/core'
+import { Paper } from '@mui/material'
 const throttle = require('lodash.throttle')

 class ClearableMessageBuffer extends q.RingBuffer<q.Message> {
@@ -1,13 +1,15 @@
 import * as q from '../../../../backend/src/Model'
 import * as React from 'react'
-import ShowChart from '@material-ui/icons/ShowChart'
+import ShowChart from '@mui/icons-material/ShowChart'
 import { AppState } from '../../reducers'
 import { bindActionCreators } from 'redux'
 import { chartActions } from '../../actions'
 import { ChartParameters } from '../../reducers/Charts'
 import { ChartWithTreeNode } from './ChartWithTreeNode'
 import { connect } from 'react-redux'
-import { Grid, Theme, Typography, withStyles } from '@material-ui/core'
+import { Grid, Typography } from '@mui/material'
+import { withStyles } from '@mui/styles'
+import { Theme } from '@mui/material/styles'
 import { List } from 'immutable'
 const { TransitionGroup, CSSTransition } = require('react-transition-group/esm')

@@ -126,4 +128,4 @@ const styles = (theme: Theme) => ({
  },
 })

-export default connect(mapStateToProps, mapDispatchToProps)(withStyles(styles)(ChartPanel))
+export default connect(mapStateToProps, mapDispatchToProps)(withStyles(styles)(ChartPanel) as any)
@@ -1,6 +1,6 @@
 import React, { useRef, useCallback, memo } from 'react'
 import { ConfirmationRequest } from '../reducers/Global'
-import { Dialog, DialogTitle, DialogContent, DialogContentText, DialogActions, Button } from '@material-ui/core'
+import { Dialog, DialogTitle, DialogContent, DialogContentText, DialogActions, Button } from '@mui/material'
 import { KeyCodes } from '../utils/KeyCodes'

 function ConfirmationDialog(props: { confirmationRequests: Array<ConfirmationRequest> }) {
@@ -1,17 +1,19 @@
 import * as React from 'react'
 import { useState, useCallback, memo } from 'react'
-import Add from '@material-ui/icons/Add'
-import Lock from '@material-ui/icons/Lock'
-import Undo from '@material-ui/icons/Undo'
+import Add from '@mui/icons-material/Add'
+import Lock from '@mui/icons-material/Lock'
+import Undo from '@mui/icons-material/Undo'
 import { bindActionCreators } from 'redux'
 import { connect } from 'react-redux'
 import { connectionManagerActions } from '../../actions'
 import { ConnectionOptions } from '../../model/ConnectionOptions'
-import { Theme, withStyles } from '@material-ui/core/styles'
-import { Button, Grid, TextField, Tooltip } from '@material-ui/core'
+import { Theme } from '@mui/material/styles'
+import { withStyles } from '@mui/styles'
+import { Button, Grid, TextField, Tooltip } from '@mui/material'
 import { QosSelect } from '../QosSelect'
 import { QoS } from '../../../../backend/src/DataSource/MqttSource'
 import Subscriptions from './Subscriptions'
+const SubscriptionsAny = Subscriptions as any

 interface Props {
  connection: ConnectionOptions
@@ -68,7 +70,7 @@ const ConnectionSettings = memo(function ConnectionSettings(props: Props) {
            </Button>
          </Grid>
          <Grid item={true} xs={12} style={{ padding: 0 }}>
-            <Subscriptions connection={props.connection} />
+            <SubscriptionsAny connection={props.connection} />
          </Grid>
          <Grid item={true} xs={7} className={classes.gridPadding}>
            <TextField
@@ -129,4 +131,4 @@ const styles = (theme: Theme) => ({
  },
 })

-export default connect(undefined, mapDispatchToProps)(withStyles(styles)(ConnectionSettings))
+export default connect(undefined, mapDispatchToProps)(withStyles(styles)(ConnectionSettings) as any)
@@ -0,0 +1,140 @@
+import * as React from 'react'
+import ClearAdornment from '../helper/ClearAdornment'
+import Lock from '@mui/icons-material/Lock'
+import { bindActionCreators } from 'redux'
+import { Button, Theme, Tooltip, Typography } from '@mui/material'
+import { CertificateParameters, ConnectionOptions } from '../../model/ConnectionOptions'
+import { CertificateTypes } from '../../actions/ConnectionManager'
+import { connect } from 'react-redux'
+import { connectionManagerActions } from '../../actions'
+import { withStyles } from '@mui/styles'
+import { rendererRpc } from '../../../../events'
+import { RpcEvents } from '../../../../events/EventsV2'
+
+function BrowserCertificateFileSelection(props: {
+  certificateType: CertificateTypes
+  title: string
+  certificate?: CertificateParameters
+  classes: any
+  actions: {
+    connectionManager: typeof connectionManagerActions
+  }
+  connection: ConnectionOptions
+}) {
+  const fileInputRef = React.useRef<HTMLInputElement>(null)
+
+  const clearCertificate = React.useCallback(() => {
+    props.actions.connectionManager.updateConnection(props.connection.id, {
+      [props.certificateType]: undefined,
+    })
+  }, [props.connection, props.certificateType])
+
+  const handleFileSelect = React.useCallback(
+    async (event: React.ChangeEvent<HTMLInputElement>) => {
+      const file = event.target.files?.[0]
+      if (!file) {
+        return
+      }
+
+      try {
+        // Read file content
+        const reader = new FileReader()
+        reader.onload = async e => {
+          const content = e.target?.result
+          if (typeof content === 'string') {
+            // Convert to base64
+            const base64Data = content.split(',')[1] || content
+
+            // Upload via IPC instead of HTTP POST
+            const result = await rendererRpc.call(RpcEvents.uploadCertificate, {
+              filename: file.name,
+              data: base64Data,
+            })
+
+            // Create certificate parameters
+            const certificate: CertificateParameters = {
+              name: result.name,
+              data: result.data,
+            }
+
+            // Update connection
+            props.actions.connectionManager.updateConnection(props.connection.id, {
+              [props.certificateType]: certificate,
+            })
+          }
+        }
+        reader.readAsDataURL(file)
+      } catch (error) {
+        console.error('Error uploading certificate:', error)
+      }
+
+      // Reset input
+      if (fileInputRef.current) {
+        fileInputRef.current.value = ''
+      }
+    },
+    [props.connection.id, props.certificateType, props.actions.connectionManager]
+  )
+
+  const handleButtonClick = () => {
+    fileInputRef.current?.click()
+  }
+
+  return (
+    <span>
+      <input
+        ref={fileInputRef}
+        type="file"
+        accept=".pem,.crt,.cer,.key"
+        style={{ display: 'none' }}
+        onChange={handleFileSelect}
+      />
+      <Tooltip title="Select certificate" placement="top">
+        <Button variant="contained" className={props.classes.button} onClick={handleButtonClick}>
+          <Lock /> {props.title}
+        </Button>
+      </Tooltip>
+      <ClearCertificate classes={props.classes} certificate={props.certificate} action={clearCertificate} />
+    </span>
+  )
+}
+
+function ClearCertificate(props: { classes: any; certificate?: CertificateParameters; action: () => void }) {
+  if (!props.certificate) {
+    return null
+  }
+
+  return (
+    <Tooltip title={props.certificate.name}>
+      <Typography className={props.classes.certificateName}>
+        <ClearAdornment action={props.action} value={props.certificate.name} />
+        {props.certificate.name}
+      </Typography>
+    </Tooltip>
+  )
+}
+
+const mapDispatchToProps = (dispatch: any) => {
+  return {
+    actions: {
+      connectionManager: bindActionCreators(connectionManagerActions, dispatch),
+    },
+  }
+}
+
+const styles = (theme: Theme) => ({
+  certificateName: {
+    width: '100%',
+    height: 'calc(1em + 4px)',
+    overflow: 'hidden' as 'hidden',
+    whiteSpace: 'nowrap' as 'nowrap',
+    textOverflow: 'ellipsis' as 'ellipsis',
+    color: theme.palette.text.secondary,
+  },
+  button: {
+    marginTop: theme.spacing(3),
+    marginRight: theme.spacing(2),
+  },
+})
+
+export default connect(undefined, mapDispatchToProps)(withStyles(styles)(BrowserCertificateFileSelection) as any)
@@ -1,13 +1,13 @@
 import * as React from 'react'
 import ClearAdornment from '../helper/ClearAdornment'
-import Lock from '@material-ui/icons/Lock'
+import Lock from '@mui/icons-material/Lock'
 import { bindActionCreators } from 'redux'
-import { Button, Theme, Tooltip, Typography } from '@material-ui/core'
+import { Button, Theme, Tooltip, Typography } from '@mui/material'
 import { CertificateParameters, ConnectionOptions } from '../../model/ConnectionOptions'
 import { CertificateTypes } from '../../actions/ConnectionManager'
 import { connect } from 'react-redux'
 import { connectionManagerActions } from '../../actions'
-import { withStyles } from '@material-ui/styles'
+import { withStyles } from '@mui/styles'

 function CertificateFileSelection(props: {
  certificateType: CertificateTypes
@@ -71,7 +71,7 @@ const styles = (theme: Theme) => ({
    overflow: 'hidden' as 'hidden',
    whiteSpace: 'nowrap' as 'nowrap',
    textOverflow: 'ellipsis' as 'ellipsis',
-    color: theme.palette.text.hint,
+    color: theme.palette.text.secondary,
  },
  button: {
    marginTop: theme.spacing(3),
@@ -79,4 +79,4 @@ const styles = (theme: Theme) => ({
  },
 })

-export default connect(undefined, mapDispatchToProps)(withStyles(styles)(CertificateFileSelection))
+export default connect(undefined, mapDispatchToProps)(withStyles(styles)(CertificateFileSelection) as any)
@@ -1,12 +1,19 @@
 import * as React from 'react'
 import CertificateFileSelection from './CertificateFileSelection'
-import Undo from '@material-ui/icons/Undo'
+import BrowserCertificateFileSelection from './BrowserCertificateFileSelection'
+import Undo from '@mui/icons-material/Undo'
 import { bindActionCreators } from 'redux'
-import { Button, Grid } from '@material-ui/core'
+import { Button, Grid } from '@mui/material'
 import { connect } from 'react-redux'
 import { connectionManagerActions } from '../../actions'
 import { ConnectionOptions } from '../../model/ConnectionOptions'
-import { Theme, withStyles } from '@material-ui/core/styles'
+import { Theme } from '@mui/material/styles'
+import { withStyles } from '@mui/styles'
+
+// Check if we're in browser mode
+const isBrowserMode =
+  typeof window !== 'undefined' && (typeof process === 'undefined' || process.env?.BROWSER_MODE === 'true')
+const CertSelector: any = isBrowserMode ? BrowserCertificateFileSelection : CertificateFileSelection

 interface Props {
  connection: ConnectionOptions
@@ -45,7 +52,7 @@ class Certificates extends React.PureComponent<Props, State> {
        <form noValidate={true} autoComplete="off">
          <Grid container={true} spacing={3}>
            <Grid item={true} xs={12} className={classes.gridPadding}>
-              <CertificateFileSelection
+              <CertSelector
                connection={this.props.connection}
                certificate={this.props.connection.selfSignedCertificate}
                title="Server Certificate (CA)"
@@ -53,7 +60,7 @@ class Certificates extends React.PureComponent<Props, State> {
              />
            </Grid>
            <Grid item={true} xs={12} className={classes.gridPadding}>
-              <CertificateFileSelection
+              <CertSelector
                connection={this.props.connection}
                certificate={this.props.connection.clientCertificate}
                title="Client Certificate"
@@ -61,7 +68,7 @@ class Certificates extends React.PureComponent<Props, State> {
              />
            </Grid>
            <Grid item={true} xs={12} className={classes.gridPadding}>
-              <CertificateFileSelection
+              <CertSelector
                connection={this.props.connection}
                certificate={this.props.connection.clientKey}
                title="Client Key"
@@ -104,4 +111,4 @@ const styles = (theme: Theme) => ({
  },
 })

-export default connect(undefined, mapDispatchToProps)(withStyles(styles)(Certificates))
+export default connect(undefined, mapDispatchToProps)(withStyles(styles)(Certificates) as any)
@@ -1,7 +1,7 @@
 import ConnectionHealthIndicator from '../helper/ConnectionHealthIndicator'
-import PowerSettingsNew from '@material-ui/icons/PowerSettingsNew'
+import PowerSettingsNew from '@mui/icons-material/PowerSettingsNew'
 import React from 'react'
-import { Button } from '@material-ui/core'
+import { Button } from '@mui/material'

 function ConnectButton(props: { connecting: boolean; classes: any; toggle: () => void }) {
  const { classes, toggle, connecting } = props
@@ -1,17 +1,18 @@
 import ConnectButton from './ConnectButton'
 import React, { useCallback, useState } from 'react'
-import Save from '@material-ui/icons/Save'
-import Delete from '@material-ui/icons/Delete'
-import Settings from '@material-ui/icons/Settings'
-import Visibility from '@material-ui/icons/Visibility'
-import VisibilityOff from '@material-ui/icons/VisibilityOff'
+import Save from '@mui/icons-material/Save'
+import Delete from '@mui/icons-material/Delete'
+import Settings from '@mui/icons-material/Settings'
+import Visibility from '@mui/icons-material/Visibility'
+import VisibilityOff from '@mui/icons-material/VisibilityOff'
 import { AppState } from '../../reducers'
 import { bindActionCreators } from 'redux'
 import { connect } from 'react-redux'
 import { connectionActions, connectionManagerActions } from '../../actions'
 import { ConnectionOptions, toMqttConnection } from '../../model/ConnectionOptions'
 import { KeyCodes } from '../../utils/KeyCodes'
-import { Theme, withStyles } from '@material-ui/core/styles'
+import { Theme } from '@mui/material/styles'
+import { withStyles } from '@mui/styles'
 import { ToggleSwitch } from './ToggleSwitch'
 import { useGlobalKeyEventHandler } from '../../effects/useGlobalKeyEventHandler'
 import {
@@ -24,7 +25,7 @@ import {
  InputLabel,
  MenuItem,
  TextField,
-} from '@material-ui/core'
+} from '@mui/material'

 interface Props {
  connection: ConnectionOptions
@@ -285,4 +286,4 @@ const styles = (theme: Theme) => ({
  },
 })

-export default connect(mapStateToProps, mapDispatchToProps)(withStyles(styles)(ConnectionSettings))
+export default connect(mapStateToProps, mapDispatchToProps)(withStyles(styles)(ConnectionSettings) as any)
@@ -1,15 +1,19 @@
 import * as React from 'react'
 import ConnectionSettings from './ConnectionSettings'
+const ConnectionSettingsAny = ConnectionSettings as any
 import ProfileList from './ProfileList'
 import { AppState } from '../../reducers'
 import { bindActionCreators } from 'redux'
 import { connect } from 'react-redux'
 import { connectionManagerActions } from '../../actions'
 import { ConnectionOptions, toMqttConnection } from '../../model/ConnectionOptions'
-import { Theme, withStyles } from '@material-ui/core/styles'
-import { Modal, Paper, Toolbar, Typography, Collapse } from '@material-ui/core'
+import { Theme } from '@mui/material/styles'
+import { withStyles } from '@mui/styles'
+import { Modal, Paper, Toolbar, Typography, Collapse } from '@mui/material'
 import AdvancedConnectionSettings from './AdvancedConnectionSettings'
+const AdvancedConnectionSettingsAny = AdvancedConnectionSettings as any
 import Certificates from './Certificates'
+const CertificatesAny = Certificates as any

 interface Props {
  actions: any
@@ -34,13 +38,13 @@ class ConnectionSetup extends React.PureComponent<Props, {}> {
    return (
      <div>
        <Collapse in={!showAdvancedSettings && !showCertificateSettings}>
-          <ConnectionSettings connection={connection} />
+          <ConnectionSettingsAny connection={connection} />
        </Collapse>
        <Collapse in={showAdvancedSettings && !showCertificateSettings}>
-          <AdvancedConnectionSettings connection={connection} />
+          <AdvancedConnectionSettingsAny connection={connection} />
        </Collapse>
        <Collapse in={showCertificateSettings}>
-          <Certificates connection={connection} />
+          <CertificatesAny connection={connection} />
        </Collapse>
      </div>
    )
@@ -111,7 +115,7 @@ const styles = (theme: Theme) => ({
    textOverflow: 'ellipsis' as 'ellipsis',
    whiteSpace: 'nowrap' as 'nowrap',
    overflow: 'hidden' as 'hidden',
-    color: theme.palette.text.hint,
+    color: theme.palette.text.secondary,
    fontSize: '0.9em',
    marginLeft: theme.spacing(4),
  },
@@ -134,4 +138,4 @@ const mapDispatchToProps = (dispatch: any) => {
  }
 }

-export default connect(mapStateToProps, mapDispatchToProps)(withStyles(styles)(ConnectionSetup))
+export default connect(mapStateToProps, mapDispatchToProps)(withStyles(styles)(ConnectionSetup) as any)
@@ -1,7 +1,8 @@
 import * as React from 'react'
-import Add from '@material-ui/icons/Add'
-import { Fab } from '@material-ui/core'
-import { Theme, withStyles } from '@material-ui/core/styles'
+import Add from '@mui/icons-material/Add'
+import { Fab } from '@mui/material'
+import { Theme } from '@mui/material/styles'
+import { withStyles } from '@mui/styles'

 const styles = (theme: Theme) => ({
  addButton: {
@@ -1,8 +1,9 @@
 import React, { useCallback } from 'react'
 import { connect } from 'react-redux'
-import { ListItem, Typography } from '@material-ui/core'
+import { ListItem, Typography } from '@mui/material'
 import { toMqttConnection, ConnectionOptions } from '../../../model/ConnectionOptions'
-import { withStyles, Theme } from '@material-ui/core/styles'
+import { withStyles } from '@mui/styles'
+import { Theme } from '@mui/material/styles'
 import { bindActionCreators } from 'redux'
 import { connectionActions, connectionManagerActions } from '../../../actions'

@@ -62,9 +63,9 @@ export const connectionItemStyle = (theme: Theme) => ({
    textOverflow: 'ellipsis' as 'ellipsis',
    whiteSpace: 'nowrap' as 'nowrap',
    overflow: 'hidden' as 'hidden',
-    color: theme.palette.text.hint,
+    color: theme.palette.text.secondary,
    fontSize: '0.7em',
  },
 })

-export default connect(null, mapDispatchToProps)(withStyles(connectionItemStyle)(ConnectionItem))
+export default connect(null, mapDispatchToProps)(withStyles(connectionItemStyle)(ConnectionItem) as any)
@@ -1,4 +1,5 @@
 import ConnectionItem from './ConnectionItem'
+const ConnectionItemAny = ConnectionItem as any
 import React from 'react'
 import { AddButton } from './AddButton'
 import { AppState } from '../../../reducers'
@@ -7,8 +8,9 @@ import { connect } from 'react-redux'
 import { connectionManagerActions } from '../../../actions'
 import { ConnectionOptions } from '../../../model/ConnectionOptions'
 import { KeyCodes } from '../../../utils/KeyCodes'
-import { List } from '@material-ui/core'
-import { Theme, withStyles } from '@material-ui/core/styles'
+import { List } from '@mui/material'
+import { Theme } from '@mui/material/styles'
+import { withStyles } from '@mui/styles'
 import { useGlobalKeyEventHandler } from '../../../effects/useGlobalKeyEventHandler'

 interface Props {
@@ -49,7 +51,7 @@ function ProfileList(props: Props) {
    <List style={{ height: '100%' }} component="nav" subheader={createConnectionButton}>
      <div className={classes.list}>
        {Object.values(connections).map(connection => (
-          <ConnectionItem connection={connection} key={connection.id} selected={selected === connection.id} />
+          <ConnectionItemAny connection={connection} key={connection.id} selected={selected === connection.id} />
        ))}
      </div>
    </List>
@@ -77,4 +79,4 @@ const mapStateToProps = (state: AppState) => {
  }
 }

-export default connect(mapStateToProps, mapDispatchToProps)(withStyles(styles)(ProfileList))
+export default connect(mapStateToProps, mapDispatchToProps)(withStyles(styles)(ProfileList) as any)
@@ -1,5 +1,5 @@
 import React, { useCallback, useState } from 'react'
-import Delete from '@material-ui/icons/Delete'
+import Delete from '@mui/icons-material/Delete'
 import { connectionManagerActions } from '../../actions'
 import { ConnectionOptions } from '../../model/ConnectionOptions'
 import {
@@ -12,9 +12,9 @@ import {
  TableBody,
  Paper,
  Theme,
-} from '@material-ui/core'
+} from '@mui/material'
 import { bindActionCreators } from 'redux'
-import { withStyles } from '@material-ui/styles'
+import { withStyles } from '@mui/styles'
 import { connect } from 'react-redux'

 function Subscriptions(props: {
@@ -87,4 +87,4 @@ const styles = (theme: Theme) => ({
  },
 })

-export default connect(undefined, mapDispatchToProps)(withStyles(styles)(Subscriptions))
+export default connect(undefined, mapDispatchToProps)(withStyles(styles)(Subscriptions) as any)
@@ -1,5 +1,5 @@
 import React from 'react'
-import { FormControlLabel, Switch } from '@material-ui/core'
+import { FormControlLabel, Switch } from '@mui/material'

 export function ToggleSwitch(props: { value: boolean; classes: any; toggle: () => void; label: string }) {
  const { classes, value, toggle, label } = props
@@ -1,5 +1,6 @@
 import * as React from 'react'
-import { Theme, withStyles } from '@material-ui/core'
+import { Theme } from '@mui/material/styles'
+import { withStyles } from '@mui/styles'

 interface Props {
  keyboardKey: string
@@ -1,5 +1,6 @@
 import * as React from 'react'
-import { Theme, withStyles } from '@material-ui/core'
+import { Theme } from '@mui/material/styles'
+import { withStyles } from '@mui/styles'
 const cursor = require('./cursor.png')

 interface State {
@@ -74,7 +75,7 @@ const style = (theme: Theme) => ({
    height: '32px',
    position: 'fixed' as 'fixed',
    zIndex: 1000000,
-    filter: theme.palette.type === 'light' ? undefined : 'invert(100%)',
+    filter: theme.palette.mode === 'light' ? undefined : 'invert(100%)',
    pointerEvents: 'none' as 'none',
  },
 })
@@ -1,5 +1,6 @@
 import * as React from 'react'
-import { Theme, withStyles } from '@material-ui/core'
+import { Theme } from '@mui/material/styles'
+import { withStyles } from '@mui/styles'
 import Key from './Key'

 interface State {
@@ -1,9 +1,10 @@
 import * as React from 'react'
 import PersistentStorage from '../utils/PersistentStorage'
-import SentimentDissatisfied from '@material-ui/icons/SentimentDissatisfied'
-import Warning from '@material-ui/icons/Warning'
-import { Theme, withStyles } from '@material-ui/core/styles'
-import { Button, Modal, Paper, Toolbar, Typography } from '@material-ui/core'
+import SentimentDissatisfied from '@mui/icons-material/SentimentDissatisfied'
+import Warning from '@mui/icons-material/Warning'
+import { Theme } from '@mui/material/styles'
+import { withStyles } from '@mui/styles'
+import { Button, Modal, Paper, Toolbar, Typography } from '@mui/material'

 interface State {
  error?: Error
@@ -11,6 +12,7 @@ interface State {

 interface Props {
  classes: any
+  children?: React.ReactNode
 }

 class ErrorBoundary extends React.PureComponent<Props, State> {
@@ -23,12 +25,12 @@ class ErrorBoundary extends React.PureComponent<Props, State> {
  }

  private restart = () => {
-    window.location = window.location
+    window.location.reload()
  }

  private clearStorage = () => {
    PersistentStorage.clear()
-    window.location = window.location
+    window.location.reload()
  }

  public componentDidCatch(error: Error, errorInfo: any) {
@@ -7,7 +7,7 @@ import { ChartParameters } from '../../reducers/Charts'
 import { connect } from 'react-redux'
 import { List } from 'immutable'
 import { Sidebar } from '../Sidebar'
-import ReactResizeDetector from 'react-resize-detector'
+import { useResizeDetector } from 'react-resize-detector'

 interface Props {
  heightProperty: any
@@ -21,11 +21,23 @@ function ContentView(props: Props) {
  const [sidebarWidth, setSidebarWidth] = React.useState<string | number>('40%')
  const [detectedHeight, setDetectedHeight] = React.useState(0)
  const [detectedSidebarWidth, setDetectedSidebarWidth] = React.useState(0)
-  const detectSize = React.useCallback((width, newHeight) => {
+  
+  const { height: resizeHeight, ref: heightRef } = useResizeDetector()
+  const { width: resizeWidth, ref: widthRef } = useResizeDetector()
+  
+  React.useEffect(() => {
+    if (resizeHeight) setDetectedHeight(resizeHeight)
+  }, [resizeHeight])
+  
+  React.useEffect(() => {
+    if (resizeWidth) setDetectedSidebarWidth(resizeWidth)
+  }, [resizeWidth])
+  
+  const detectSize = React.useCallback((width: any, newHeight: any) => {
    setDetectedHeight(newHeight)
  }, [])

-  const detectSidebarSize = React.useCallback(width => {
+  const detectSidebarSize = React.useCallback((width: any) => {
    setDetectedSidebarWidth(width)
  }, [])

@@ -85,15 +97,13 @@ function ContentView(props: Props) {
            >
              <Tree />
              {/** Passing height constraints via flex options down */}
-              <div style={{ flex: 1, display: 'flex', height: '100%', width: '100%' }}>
+              <div ref={heightRef} style={{ flex: 1, display: 'flex', height: '100%', width: '100%' }}>
                {/** Resize detector must not be in the scroll zone, it needs to detect actual available size */}
-                <ReactResizeDetector handleHeight={true} onResize={detectSize} />
                <ChartPanel />
              </div>
            </ReactSplitPane>
          </span>
-          <div style={{ height: '100%' }}>
-            <ReactResizeDetector handleWidth={true} onResize={detectSidebarSize} />
+          <div ref={widthRef} style={{ height: '100%' }}>
            <div
              className={props.paneDefaults}
              style={{ minWidth: '250px', height: '100%', overflowY: 'auto', overflowX: 'hidden' }}
@@ -1,8 +1,9 @@
 import * as React from 'react'

-import { Snackbar, SnackbarContent } from '@material-ui/core'
-import { Theme, withStyles } from '@material-ui/core/styles'
-import { green, red } from '@material-ui/core/colors'
+import { Snackbar, SnackbarContent } from '@mui/material'
+import { Theme } from '@mui/material/styles'
+import { withStyles } from '@mui/styles'
+import { green, red } from '@mui/material/colors'

 interface Props {
  message?: string
@@ -1,13 +1,14 @@
 import * as React from 'react'
 import * as q from '../../../../backend/src/Model'
 import CustomIconButton from '../helper/CustomIconButton'
-import Pause from '@material-ui/icons/PauseCircleFilled'
-import Resume from '@material-ui/icons/PlayArrow'
+import Pause from '@mui/icons-material/PauseCircleFilled'
+import Resume from '@mui/icons-material/PlayArrow'
 import { AppState } from '../../reducers'
 import { bindActionCreators } from 'redux'
 import { connect } from 'react-redux'
 import { treeActions } from '../../actions'
-import { withStyles, Theme } from '@material-ui/core/styles'
+import { withStyles } from '@mui/styles'
+import { Theme } from '@mui/material/styles'

 const styles = (theme: Theme) => ({
  icon: {
@@ -102,4 +103,4 @@ const mapDispatchToProps = (dispatch: any) => {
  }
 }

-export default connect(mapStateToProps, mapDispatchToProps)(withStyles(styles)(PauseButton))
+export default connect(mapStateToProps, mapDispatchToProps)(withStyles(styles)(PauseButton) as any)
@@ -1,12 +1,13 @@
 import React, { useCallback, useState, useRef } from 'react'
 import ClearAdornment from '../helper/ClearAdornment'
-import Search from '@material-ui/icons/Search'
+import Search from '@mui/icons-material/Search'
 import { AppState } from '../../reducers'
 import { bindActionCreators } from 'redux'
 import { connect } from 'react-redux'
-import { InputBase } from '@material-ui/core'
+import { InputBase } from '@mui/material'
 import { settingsActions } from '../../actions'
-import { fade, Theme, withStyles } from '@material-ui/core/styles'
+import { alpha as fade, Theme } from '@mui/material/styles'
+import { withStyles } from '@mui/styles'
 import { useGlobalKeyEventHandler } from '../../effects/useGlobalKeyEventHandler'
 import { KeyCodes } from '../../utils/KeyCodes'

@@ -142,4 +143,4 @@ const styles = (theme: Theme) => ({
  },
 })

-export default connect(mapStateToProps, mapDispatchToProps)(withStyles(styles)(SearchBar))
+export default connect(mapStateToProps, mapDispatchToProps)(withStyles(styles)(SearchBar) as any)
@@ -1,15 +1,17 @@
 import * as React from 'react'
-import CloudOff from '@material-ui/icons/CloudOff'
+import CloudOff from '@mui/icons-material/CloudOff'
 import ConnectionHealthIndicator from '../helper/ConnectionHealthIndicator'
-import Menu from '@material-ui/icons/Menu'
+const ConnectionHealthIndicatorAny = ConnectionHealthIndicator as any
+import Menu from '@mui/icons-material/Menu'
 import PauseButton from './PauseButton'
 import SearchBar from './SearchBar'
-import { AppBar, Button, IconButton, Toolbar, Typography } from '@material-ui/core'
+import { AppBar, Button, IconButton, Toolbar, Typography } from '@mui/material'
 import { AppState } from '../../reducers'
 import { bindActionCreators } from 'redux'
 import { connect } from 'react-redux'
 import { connectionActions, globalActions, settingsActions } from '../../actions'
-import { Theme, withStyles } from '@material-ui/core/styles'
+import { Theme } from '@mui/material/styles'
+import { withStyles } from '@mui/styles'

 const styles = (theme: Theme) => ({
  title: {
@@ -75,12 +77,12 @@ class TitleBar extends React.PureComponent<Props, {}> {
          <PauseButton />
          <Button
            className={classes.disconnect}
-            classes={{ label: classes.disconnectLabel }}
+            sx={{ color: 'primary.contrastText' }}
            onClick={actions.connection.disconnect}
          >
            Disconnect <CloudOff className={classes.disconnectIcon} />
          </Button>
-          <ConnectionHealthIndicator withBackground={true} />
+          <ConnectionHealthIndicatorAny withBackground={true} />
        </Toolbar>
      </AppBar>
    )
@@ -0,0 +1,57 @@
+import * as React from 'react'
+import { Dialog, DialogTitle, DialogContent, DialogActions, TextField, Button, Typography } from '@mui/material'
+
+interface LoginDialogProps {
+  open: boolean
+  onLogin: (username: string, password: string) => void
+  error?: string
+}
+
+export function LoginDialog(props: LoginDialogProps) {
+  const [username, setUsername] = React.useState('')
+  const [password, setPassword] = React.useState('')
+
+  const handleSubmit = (e: React.FormEvent) => {
+    e.preventDefault()
+    props.onLogin(username, password)
+  }
+
+  return (
+    <Dialog open={props.open} disableEscapeKeyDown onClose={(event, reason) => { if (reason !== 'backdropClick') { /* Allow closing only via escape if needed */ } }}>
+      <form onSubmit={handleSubmit}>
+        <DialogTitle>Login to MQTT Explorer</DialogTitle>
+        <DialogContent>
+          {props.error && (
+            <Typography color="error" style={{ marginBottom: 16 }}>
+              {props.error}
+            </Typography>
+          )}
+          <TextField
+            autoFocus
+            margin="dense"
+            label="Username"
+            type="text"
+            fullWidth
+            value={username}
+            onChange={e => setUsername(e.target.value)}
+            required
+          />
+          <TextField
+            margin="dense"
+            label="Password"
+            type="password"
+            fullWidth
+            value={password}
+            onChange={e => setPassword(e.target.value)}
+            required
+          />
+        </DialogContent>
+        <DialogActions>
+          <Button type="submit" color="primary" variant="contained">
+            Login
+          </Button>
+        </DialogActions>
+      </form>
+    </Dialog>
+  )
+}
@@ -1,5 +1,5 @@
 import * as React from 'react'
-import { TextField, MenuItem, Tooltip } from '@material-ui/core'
+import { TextField, MenuItem, Tooltip } from '@mui/material'
 import { QoS } from '../../../backend/src/DataSource/MqttSource'

 export function QosSelect(props: { selected: QoS; onChange: (value: QoS) => void; label?: string }) {
@@ -1,6 +1,6 @@
 import * as React from 'react'
-import { InputLabel, Switch, Theme, Tooltip } from '@material-ui/core'
-import { withStyles } from '@material-ui/styles'
+import { InputLabel, Switch, Theme, Tooltip } from '@mui/material'
+import { withStyles } from '@mui/styles'
 const sha1 = require('sha1')

 function BooleanSwitch(props: { title: string; value: boolean; tooltip: string; action: () => void; classes: any }) {
@@ -3,9 +3,10 @@ import React, { useMemo } from 'react'
 import { AppState } from '../../reducers'
 import { Base64Message } from '../../../../backend/src/Model/Base64Message'
 import { connect } from 'react-redux'
-import { Theme, withStyles } from '@material-ui/core/styles'
+import { Theme } from '@mui/material/styles'
+import { withStyles } from '@mui/styles'
 import { TopicViewModel } from '../../model/TopicViewModel'
-import { Typography } from '@material-ui/core'
+import { Typography } from '@mui/material'
 import { usePollingToFetchTreeNode } from '../helper/usePollingToFetchTreeNode'
 import { useUpdateComponentWhenNodeUpdates } from '../helper/useUpdateComponentWhenNodeUpdates'
 const abbreviate = require('number-abbreviate')
@@ -19,7 +20,7 @@ const styles = (theme: Theme) => ({
  container: {
    width: '100%',
    height: '224px',
-    backgroundColor: theme.palette.type === 'dark' ? 'rebeccapurple' : '#ebebeb',
+    backgroundColor: theme.palette.mode === 'dark' ? 'rebeccapurple' : '#ebebeb',
    marginBottom: 0,
    padding: '8px',
  },
@@ -1,15 +1,23 @@
 import * as React from 'react'
 import BooleanSwitch from './BooleanSwitch'
 import BrokerStatistics from './BrokerStatistics'
-import ChevronRight from '@material-ui/icons/ChevronRight'
+import ChevronRight from '@mui/icons-material/ChevronRight'
 import TimeLocale from './TimeLocale'
 import { AppState } from '../../reducers'
 import { bindActionCreators } from 'redux'
 import { connect } from 'react-redux'
 import { globalActions, settingsActions } from '../../actions'
 import { shell } from 'electron'
-import { Theme, withStyles } from '@material-ui/core/styles'
+import { Theme } from '@mui/material/styles'
+import { withStyles } from '@mui/styles'
 import { TopicOrder } from '../../reducers/Settings'
+import {
+  MAX_MESSAGE_SIZE_20KB,
+  MAX_MESSAGE_SIZE_100KB,
+  MAX_MESSAGE_SIZE_1MB,
+  MAX_MESSAGE_SIZE_5MB,
+  MAX_MESSAGE_SIZE_UNLIMITED,
+} from '../../../../events/EventsV2'

 import {
  Divider,
@@ -21,7 +29,7 @@ import {
  Select,
  Typography,
  Tooltip,
-} from '@material-ui/core'
+} from '@mui/material'

 export const autoExpandLimitSet = [
  {
@@ -70,7 +78,7 @@ const styles = (theme: Theme) => ({
  },
  author: {
    margin: 'auto 8px 8px auto',
-    color: theme.palette.text.hint,
+    color: theme.palette.text.secondary,
    cursor: 'pointer' as 'pointer',
  },
 })
@@ -88,6 +96,7 @@ interface Props {
  topicOrder: TopicOrder
  visible: boolean
  theme: 'light' | 'dark'
+  maxMessageSize: number
 }

 class Settings extends React.PureComponent<Props, {}> {
@@ -203,6 +212,47 @@ class Settings extends React.PureComponent<Props, {}> {
    this.props.actions.settings.setTopicOrder(e.target.value as TopicOrder)
  }

+  private renderMaxMessageSize() {
+    const { classes, maxMessageSize } = this.props
+
+    const formatSize = (size: number) => {
+      if (size === MAX_MESSAGE_SIZE_UNLIMITED) {
+        return 'Unlimited'
+      } else if (size >= 1000000) {
+        return `${size / 1000000} MB`
+      } else if (size >= 1000) {
+        return `${size / 1000} KB`
+      }
+      return `${size} bytes`
+    }
+
+    return (
+      <div style={{ padding: '8px', display: 'flex' }}>
+        <InputLabel htmlFor="max-message-size" style={{ flex: '1', marginTop: '8px' }}>
+          Max Message Size
+        </InputLabel>
+        <Select
+          value={maxMessageSize}
+          onChange={this.onChangeMaxMessageSize}
+          input={<Input name="max-message-size" id="max-message-size-label-placeholder" />}
+          name="max-message-size"
+          className={classes.input}
+          style={{ flex: '1' }}
+        >
+          <MenuItem value={MAX_MESSAGE_SIZE_20KB}>{formatSize(MAX_MESSAGE_SIZE_20KB)}</MenuItem>
+          <MenuItem value={MAX_MESSAGE_SIZE_100KB}>{formatSize(MAX_MESSAGE_SIZE_100KB)}</MenuItem>
+          <MenuItem value={MAX_MESSAGE_SIZE_1MB}>{formatSize(MAX_MESSAGE_SIZE_1MB)}</MenuItem>
+          <MenuItem value={MAX_MESSAGE_SIZE_5MB}>{formatSize(MAX_MESSAGE_SIZE_5MB)}</MenuItem>
+          <MenuItem value={MAX_MESSAGE_SIZE_UNLIMITED}>{formatSize(MAX_MESSAGE_SIZE_UNLIMITED)}</MenuItem>
+        </Select>
+      </div>
+    )
+  }
+
+  private onChangeMaxMessageSize = (e: React.ChangeEvent<{ value: unknown }>) => {
+    this.props.actions.settings.setMaxMessageSize(parseInt(String(e.target.value), 10))
+  }
+
  public render() {
    const { classes, actions, visible } = this.props
    return (
@@ -220,6 +270,7 @@ class Settings extends React.PureComponent<Props, {}> {
          {this.renderAutoExpand()}
          {this.renderNodeOrder()}
          <TimeLocale />
+          {this.renderMaxMessageSize()}
          {this.renderHighlightTopicUpdates()}
          {this.selectTopicsOnMouseOver()}
          {this.toggleTheme()}
@@ -243,6 +294,7 @@ const mapStateToProps = (state: AppState) => {
    highlightTopicUpdates: state.settings.get('highlightTopicUpdates'),
    selectTopicWithMouseOver: state.settings.get('selectTopicWithMouseOver'),
    theme: state.settings.get('theme'),
+    maxMessageSize: state.settings.get('maxMessageSize'),
  }
 }

@@ -3,9 +3,9 @@ import DateFormatter from '../helper/DateFormatter'
 import { AppState } from '../../reducers'
 import { bindActionCreators } from 'redux'
 import { connect } from 'react-redux'
-import { Input, InputLabel, MenuItem, Select, Theme } from '@material-ui/core'
+import { Input, InputLabel, MenuItem, Select, Theme } from '@mui/material'
 import { settingsActions } from '../../actions'
-import { withStyles } from '@material-ui/styles'
+import { withStyles } from '@mui/styles'

 function importAll(r: any) {
  r.keys().forEach(r)
@@ -38,7 +38,7 @@ function TimeLocaleSettings(props: Props) {
    </MenuItem>
  ))

-  function updateLocale(e: React.ChangeEvent<{ value: unknown }>) {
+  function updateLocale(e: any) {
    const locale = e.target.value ? String(e.target.value) : ''
    actions.settings.setTimeLocale(locale)
  }
@@ -1,11 +1,11 @@
 import * as q from '../../../../../backend/src/Model'
 import * as React from 'react'
-import ShowChart from '@material-ui/icons/ShowChart'
+import ShowChart from '@mui/icons-material/ShowChart'
 import TopicPlot from '../../TopicPlot'
 import { bindActionCreators } from 'redux'
 import { chartActions } from '../../../actions'
 import { connect } from 'react-redux'
-import { Fade, Paper, Popper, Tooltip } from '@material-ui/core'
+import { Fade, Paper, Popper, Tooltip } from '@mui/material'
 import { JsonPropertyLocation } from '../../../../../backend/src/JsonAstParser'

 interface Props {
@@ -52,16 +52,16 @@ function ChartPreview(props: Props) {
      />
    </Tooltip>
  ) : (
-      <Tooltip title="Add to chart panel, not enough data for preview">
-        <ShowChart
-          onClick={onClick}
-          className={props.classes.icon}
-          style={{ color: '#aaa' }}
-          data-test-type="ShowChart"
-          data-test={props.literal.path}
-        />
-      </Tooltip>
-    )
+    <Tooltip title="Add to chart panel, not enough data for preview">
+      <ShowChart
+        onClick={onClick}
+        className={props.classes.icon}
+        style={{ color: '#aaa' }}
+        data-test-type="ShowChart"
+        data-test={props.literal.path}
+      />
+    </Tooltip>
+  )

  return (
    <span>
@@ -69,7 +69,11 @@ function ChartPreview(props: Props) {
      <Popper open={open} anchorEl={chartIconRef.current} placement="left-end">
        <Fade in={open} timeout={300}>
          <Paper style={{ width: '300px' }}>
-            {open ? <TopicPlot node={props.treeNode} history={props.treeNode.messageHistory} dotPath={props.literal.path} /> : <span />}
+            {open ? (
+              <TopicPlot node={props.treeNode} history={props.treeNode.messageHistory} dotPath={props.literal.path} />
+            ) : (
+              <span />
+            )}
          </Paper>
        </Fade>
      </Popper>
@@ -1,6 +1,6 @@
 import * as React from 'react'
-import { Theme } from '@material-ui/core'
-import { withStyles } from '@material-ui/styles'
+import { Theme } from '@mui/material'
+import { withStyles } from '@mui/styles'

 interface Props {
  changes: Array<Diff.Change>
@@ -1,13 +1,13 @@
 import * as diff from 'diff'
 import * as q from '../../../../../backend/src/Model'
 import * as React from 'react'
-import Add from '@material-ui/icons/Add'
+import Add from '@mui/icons-material/Add'
 import ChartPreview from './ChartPreview'
-import Remove from '@material-ui/icons/Remove'
+import Remove from '@mui/icons-material/Remove'
 import { JsonPropertyLocation } from '../../../../../backend/src/JsonAstParser'
 import { lineChangeStyle, trimNewlineRight } from './util'
-import { Theme } from '@material-ui/core'
-import { withStyles } from '@material-ui/styles'
+import { Theme } from '@mui/material'
+import { withStyles } from '@mui/styles'

 interface Props {
  changes: Array<diff.Change>
@@ -8,7 +8,8 @@ import { isPlottable, lineChangeStyle, trimNewlineRight } from './util'
 import { JsonPropertyLocation, literalsMappedByLines } from '../../../../../backend/src/JsonAstParser'
 import { selectTextWithCtrlA } from '../../../utils/handleTextSelectWithCtrlA'
 import { style } from './style'
-import { withStyles, Typography } from '@material-ui/core'
+import { Typography } from '@mui/material'
+import { withStyles } from '@mui/styles'
 import 'prismjs/components/prism-json'

 interface Props {
@@ -1,8 +1,8 @@
 import { CodeBlockColors, CodeBlockColorsBraceMonokai } from '../CodeBlockColors'
-import { Theme } from '@material-ui/core'
+import { Theme } from '@mui/material'

 export const style = (theme: Theme) => {
-  const codeBlockColors = theme.palette.type === 'light' ? CodeBlockColors : CodeBlockColorsBraceMonokai
+  const codeBlockColors = theme.palette.mode === 'light' ? CodeBlockColors : CodeBlockColorsBraceMonokai
  const codeBaseStyle = {
    font: "12px/normal 'Monaco', 'Menlo', 'Ubuntu Mono', 'Consolas', 'source-code-pro', monospace",
    display: 'inline-grid' as 'inline-grid',
@@ -1,7 +1,8 @@
 import React, { useCallback, useState, useEffect, memo } from 'react'
-import { Badge, Typography } from '@material-ui/core'
+import { Badge, Typography } from '@mui/material'
 import { selectTextWithCtrlA } from '../../utils/handleTextSelectWithCtrlA'
-import { Theme, withStyles, emphasize } from '@material-ui/core/styles'
+import { Theme, emphasize } from '@mui/material/styles'
+import { withStyles } from '@mui/styles'

 interface HistoryItem {
  key: string
@@ -1,6 +1,6 @@
 import React, { memo } from 'react'
 import { Message } from '../../../../backend/src/Model'
-import { Tooltip } from '@material-ui/core'
+import { Tooltip } from '@mui/material'

 export const MessageId = memo(function MessageId(props: { message: Message; addComma?: boolean }) {
  const { message, addComma } = props
@@ -1,7 +1,7 @@
 import * as q from '../../../../backend/src/Model'
 import * as React from 'react'
 import { TopicViewModel } from '../../model/TopicViewModel'
-import { Typography } from '@material-ui/core'
+import { Typography } from '@mui/material'

 interface Props {
  node?: q.TreeNode<TopicViewModel>
@@ -1,7 +1,7 @@
 import React from 'react'
-import ExpandMore from '@material-ui/icons/ExpandMore'
-import { ExpansionPanel, ExpansionPanelDetails, ExpansionPanelSummary, Typography, Theme } from '@material-ui/core'
-import { withStyles } from '@material-ui/styles'
+import ExpandMore from '@mui/icons-material/ExpandMore'
+import { Accordion, AccordionDetails, AccordionSummary, Typography, Theme } from '@mui/material'
+import { withStyles } from '@mui/styles'

 const styles = (theme: Theme) => ({
  summary: { minHeight: '0' },
@@ -19,14 +19,14 @@ const Panel = (props: {
  detailsHidden?: boolean
 }) => {
  return (
-    <ExpansionPanel defaultExpanded={true} disabled={props.disabled}>
-      <ExpansionPanelSummary expandIcon={<ExpandMore />} className={props.classes.summary}>
+    <Accordion defaultExpanded={true} disabled={props.disabled}>
+      <AccordionSummary expandIcon={<ExpandMore />} className={props.classes.summary}>
        <Typography className={props.classes.heading}>{props.children[0]}</Typography>
-      </ExpansionPanelSummary>
+      </AccordionSummary>
      {props.detailsHidden ? null : (
-        <ExpansionPanelDetails className={props.classes.detail}>{props.children[1]}</ExpansionPanelDetails>
+        <AccordionDetails className={props.classes.detail}>{props.children[1]}</AccordionDetails>
      )}
-    </ExpansionPanel>
+    </Accordion>
  )
 }

@@ -1,6 +1,6 @@
 import * as React from 'react'
 import { default as AceEditor } from 'react-ace'
-import { Theme, withTheme } from '@material-ui/core'
+import { useTheme } from '@mui/material/styles'
 import 'ace-builds'
 import 'ace-builds/webpack-resolver'
 import 'ace-builds/src-noconflict/mode-json'
@@ -13,11 +13,11 @@ import 'react-ace'

 function Editor(props: {
  editorMode: string
-  theme: Theme
  value: string | undefined
  onChange: (value: string) => void
  editorRef: React.Ref<AceEditor>
 }) {
+  const theme = useTheme()
  const editorOptions = {
    showLineNumbers: false,
    tabSize: 2,
@@ -28,7 +28,7 @@ function Editor(props: {
      ref={props.editorRef}
      style={{}}
      mode={props.editorMode}
-      theme={props.theme.palette.type === 'dark' ? 'monokai' : 'dawn'}
+      theme={theme.palette.mode === 'dark' ? 'monokai' : 'dawn'}
      name="UNIQUE_ID_OF_DIV"
      width="100%"
      height="200px"
@@ -45,4 +45,4 @@ function Editor(props: {
  )
 }

-export default withTheme(Editor)
+export default Editor
@@ -1,5 +1,5 @@
 import * as React from 'react'
-import { FormControlLabel, Radio, RadioGroup } from '@material-ui/core'
+import { FormControlLabel, Radio, RadioGroup } from '@mui/material'

 interface Props {
  value: string
@@ -1,14 +1,14 @@
 import Editor from './Editor'
-import { AttachFileOutlined, FormatAlignLeft } from '@material-ui/icons'
+import { AttachFileOutlined, FormatAlignLeft } from '@mui/icons-material'
 import Message from './Model/Message'
-import Navigation from '@material-ui/icons/Navigation'
+import Navigation from '@mui/icons-material/Navigation'
 import PublishHistory from './PublishHistory'
 import React, { useCallback, useMemo, useState, useRef, memo } from 'react'
 import RetainSwitch from './RetainSwitch'
 import TopicInput from './TopicInput'
 import { AppState } from '../../../reducers'
 import { bindActionCreators } from 'redux'
-import { Button, Fab, Theme, Tooltip, withTheme } from '@material-ui/core'
+import { Button, Fab, Tooltip, useTheme } from '@mui/material'
 import { connect } from 'react-redux'
 import { EditorModeSelect } from './EditorModeSelect'
 import { globalActions, publishActions } from '../../../actions'
@@ -23,7 +23,6 @@ interface Props {
  globalActions: typeof globalActions
  retain: boolean
  editorMode: string
-  theme: Theme
 }

 function useHistory(): [Array<Message>, (topic: string, payload?: string) => void] {
@@ -42,6 +41,7 @@ function useHistory(): [Array<Message>, (topic: string, payload?: string) => voi
 }

 function Publish(props: Props) {
+  const theme = useTheme()
  const editorRef = useRef<AceEditor>()
  const [history, amendToHistory] = useHistory()

@@ -221,4 +221,4 @@ const mapStateToProps = (state: AppState) => {
  }
 }

-export default connect(mapStateToProps, mapDispatchToProps)(withTheme(Publish))
+export default connect(mapStateToProps, mapDispatchToProps)(Publish)
@@ -1,6 +1,6 @@
 import QosSelect from './QosPublishOption'
 import React from 'react'
-import { Checkbox, FormControlLabel, Tooltip } from '@material-ui/core'
+import { Checkbox, FormControlLabel, Tooltip } from '@mui/material'
 import { publishActions } from '../../../actions'
 import { bindActionCreators } from 'redux'
 import { AppState } from '../../../reducers'
@@ -1,6 +1,6 @@
 import ClearAdornment from '../../helper/ClearAdornment'
 import React, { useCallback, useMemo, useRef } from 'react'
-import { FormControl, Input, InputLabel } from '@material-ui/core'
+import { FormControl, Input, InputLabel } from '@mui/material'
 import { publishActions } from '../../../actions'
 import { bindActionCreators } from 'redux'
 import { AppState } from '../../../reducers'
@@ -2,12 +2,14 @@ import * as q from '../../../../backend/src/Model'
 import React, { useState, useEffect, useCallback } from 'react'
 import NodeStats from './NodeStats'
 import ValuePanel from './ValueRenderer/ValuePanel'
+const ValuePanelAny = ValuePanel as any
 import { AppState } from '../../reducers'
-import { ExpansionPanelDetails } from '@material-ui/core'
+import { AccordionDetails } from '@mui/material'
 import { bindActionCreators } from 'redux'
 import { connect } from 'react-redux'
 import { settingsActions, sidebarActions } from '../../actions'
-import { Theme, withStyles } from '@material-ui/core/styles'
+import { Theme } from '@mui/material/styles'
+import { withStyles } from '@mui/styles'
 import { TopicViewModel } from '../../model/TopicViewModel'
 import TopicPanel from './TopicPanel/TopicPanel'
 import Panel from './Panel'
@@ -56,16 +58,16 @@ function Sidebar(props: Props) {
    <div id="Sidebar" className={classes.drawer}>
      <div>
        <TopicPanel node={node} />
-        <ValuePanel lastUpdate={node ? node.lastUpdate : 0} />
+        <ValuePanelAny lastUpdate={node ? node.lastUpdate : 0} />
        <Panel>
          <span>Publish</span>
          <Publish connectionId={props.connectionId} />
        </Panel>
        <Panel detailsHidden={!node}>
          <span>Stats</span>
-          <ExpansionPanelDetails className={classes.details}>
+          <AccordionDetails className={classes.details}>
            <NodeStats node={node} />
-          </ExpansionPanelDetails>
+          </AccordionDetails>
        </Panel>
      </div>
    </div>
@@ -1,8 +1,8 @@
 import * as q from '../../../../../backend/src/Model'
 import CustomIconButton from '../../helper/CustomIconButton'
-import Delete from '@material-ui/icons/Delete'
+import Delete from '@mui/icons-material/Delete'
 import React, { useCallback } from 'react'
-import { Badge } from '@material-ui/core'
+import { Badge } from '@mui/material'

 export const RecursiveTopicDeleteButton = (props: {
  node?: q.TreeNode<any>
@@ -1,7 +1,8 @@
 import React from 'react'
 import * as q from '../../../../../backend/src/Model'
-import Button from '@material-ui/core/Button'
-import { withStyles, Theme } from '@material-ui/core/styles'
+import Button from '@mui/material/Button'
+import { withStyles } from '@mui/styles'
+import { Theme } from '@mui/material/styles'
 import { treeActions } from '../../../actions'
 import { bindActionCreators } from 'redux'
 import { connect } from 'react-redux'
@@ -39,8 +40,8 @@ class Topic extends React.PureComponent<Props, {}> {
        <Button
          onClick={() => this.props.actions.selectTopic(edge!.target)}
          size="small"
-          variant={theme.palette.type === 'light' ? 'contained' : undefined}
-          color={theme.palette.type === 'light' ? 'primary' : 'secondary'}
+          variant={theme.palette.mode === 'light' ? 'contained' : undefined}
+          color={theme.palette.mode === 'light' ? 'primary' : 'secondary'}
          className={this.props.classes.button}
          key={edge!.hash()}
        >
@@ -66,4 +67,4 @@ const mapDispatchToProps = (dispatch: any) => {
  }
 }

-export default connect(null, mapDispatchToProps)(withStyles(styles, { withTheme: true })(Topic))
+export default connect(null, mapDispatchToProps)(withStyles(styles, { withTheme: true })(Topic) as any)
@@ -1,6 +1,6 @@
 import * as q from '../../../../../backend/src/Model'
 import CustomIconButton from '../../helper/CustomIconButton'
-import Delete from '@material-ui/icons/Delete'
+import Delete from '@mui/icons-material/Delete'
 import React from 'react'

 export const TopicDeleteButton = (props: {
@@ -3,6 +3,7 @@ import Copy from '../../helper/Copy'
 import Panel from '../Panel'
 import React, { useMemo, useCallback } from 'react'
 import Topic from './Topic'
+const TopicAny = Topic as any
 import { bindActionCreators } from 'redux'
 import { connect } from 'react-redux'
 import { RecursiveTopicDeleteButton } from './RecursiveTopicDeleteButton'
@@ -31,7 +32,7 @@ const TopicPanel = (props: { node?: q.TreeNode<any>; actions: typeof sidebarActi
          <RecursiveTopicDeleteButton node={node} deleteTopicAction={deleteTopic} />
          <TopicTypeButton node={node} />
        </span>
-        <Topic node={node} />
+        <TopicAny node={node} />
      </Panel>
    ),
    [node, node?.childTopicCount()]
@@ -1,15 +1,15 @@
 import React, { useCallback, useMemo } from 'react'
 import * as q from '../../../../../backend/src/Model'
-import ClickAwayListener from '@material-ui/core/ClickAwayListener'
-import Grow from '@material-ui/core/Grow'
-import Button from '@material-ui/core/Button'
-import Paper from '@material-ui/core/Paper'
-import Popper from '@material-ui/core/Popper'
-import MenuItem from '@material-ui/core/MenuItem'
-import MenuList from '@material-ui/core/MenuList'
-import WarningRounded from '@material-ui/icons/WarningRounded'
+import ClickAwayListener from '@mui/material/ClickAwayListener'
+import Grow from '@mui/material/Grow'
+import Button from '@mui/material/Button'
+import Paper from '@mui/material/Paper'
+import Popper from '@mui/material/Popper'
+import MenuItem from '@mui/material/MenuItem'
+import MenuList from '@mui/material/MenuList'
+import WarningRounded from '@mui/icons-material/WarningRounded'
 import { MessageDecoder, decoders } from '../../../decoders'
-import { Tooltip } from '@material-ui/core'
+import { Tooltip } from '@mui/material'

 export const TopicTypeButton = (props: { node?: q.TreeNode<any> }) => {
  const { node } = props
@@ -46,7 +46,7 @@ export const TopicTypeButton = (props: { node?: q.TreeNode<any> }) => {
    [open]
  )

-  const handleClose = useCallback((event: React.MouseEvent<Document, MouseEvent>) => {
+  const handleClose = useCallback((event: any) => {
    if (anchorEl && anchorEl.contains(event.target as HTMLElement)) {
      return
    }
@@ -1,10 +1,12 @@
 import React, { useCallback } from 'react'
-import Code from '@material-ui/icons/Code'
-import Reorder from '@material-ui/icons/Reorder'
-import ToggleButton from '@material-ui/lab/ToggleButton'
-import ToggleButtonGroup from '@material-ui/lab/ToggleButtonGroup'
+import Code from '@mui/icons-material/Code'
+import Reorder from '@mui/icons-material/Reorder'
+import ToggleButton from '@mui/lab/ToggleButton'
+import ToggleButtonGroup from '@mui/lab/ToggleButtonGroup'
 import { settingsActions } from '../../../actions'
-import { Tooltip, withStyles, Theme } from '@material-ui/core'
+import { Tooltip } from '@mui/material'
+import { withStyles } from '@mui/styles'
+import { Theme } from '@mui/material/styles'
 import { bindActionCreators } from 'redux'
 import { AppState } from '../../../reducers'
 import { connect } from 'react-redux'
@@ -73,4 +75,4 @@ const mapStateToProps = (state: AppState) => {
  }
 }

-export default connect(mapStateToProps, mapDispatchToProps)(withStyles(styles)(ActionButtons))
+export default connect(mapStateToProps, mapDispatchToProps)(withStyles(styles)(ActionButtons) as any)
@@ -1,7 +1,7 @@
-import Clear from '@material-ui/icons/Clear'
+import Clear from '@mui/icons-material/Clear'
 import React, { useMemo } from 'react'
 import { bindActionCreators } from 'redux'
-import { Button, Tooltip } from '@material-ui/core'
+import { Button, Tooltip } from '@mui/material'
 import { connect } from 'react-redux'
 import { sidebarActions } from '../../../actions'

@@ -1,6 +1,6 @@
 import * as q from '../../../../../backend/src/Model'
 import * as React from 'react'
-import ShowChart from '@material-ui/icons/ShowChart'
+import ShowChart from '@mui/icons-material/ShowChart'
 import Copy from '../../helper/Copy'
 import DateFormatter from '../../helper/DateFormatter'
 import History from '../HistoryDrawer'
@@ -9,7 +9,9 @@ import React, { useCallback } from 'react'
 import ValueRenderer from './ValueRenderer'
 import { AppState } from '../../../reducers'
 import { bindActionCreators } from 'redux'
-import { Theme, Typography, withStyles } from '@material-ui/core'
+import { Typography } from '@mui/material'
+import { Theme } from '@mui/material/styles'
+import { withStyles } from '@mui/styles'
 import { connect } from 'react-redux'
 import { sidebarActions } from '../../../actions'
 import DeleteSelectedTopicButton from './DeleteSelectedTopicButton'
@@ -143,4 +145,4 @@ const styles = (theme: Theme) => ({
 })

 // @ts-ignore
-export default connect(mapStateToProps, mapDispatchToProps)(withStyles(styles)(ValuePanel))
+export default connect(mapStateToProps, mapDispatchToProps)(withStyles(styles)(ValuePanel) as any)
@@ -4,7 +4,7 @@ import CodeDiff from '../CodeDiff'
 import { AppState } from '../../../reducers'
 import { connect } from 'react-redux'
 import { ValueRendererDisplayMode } from '../../../reducers/Settings'
-import { Fade } from '@material-ui/core'
+import { Fade } from '@mui/material'
 import { Decoder } from '../../../../../backend/src/Model/Decoder'
 import { useDecoder } from '../../hooks/useDecoder'
 import { TopicViewModel } from '../../../model/TopicViewModel'
@@ -3,7 +3,8 @@ import React, { useEffect, useState, useMemo } from 'react'
 import TreeNode from '.'
 import { SettingsState } from '../../../reducers/Settings'
 import { sortedNodes } from '../../../sortedNodes'
-import { Theme, withStyles } from '@material-ui/core'
+import { Theme } from '@mui/material/styles'
+import { withStyles } from '@mui/styles'
 import { TopicViewModel } from '../../../model/TopicViewModel'
 import { treeActions } from '../../../actions'

@@ -1,6 +1,7 @@
 import * as q from '../../../../../backend/src/Model'
 import React, { memo } from 'react'
-import { Theme, withStyles } from '@material-ui/core'
+import { Theme } from '@mui/material/styles'
+import { withStyles } from '@mui/styles'
 import { TopicViewModel } from '../../../model/TopicViewModel'
 import { useDecoder } from '../../hooks/useDecoder'

@@ -94,7 +95,7 @@ const styles = (theme: Theme) => ({
    overflow: 'hidden' as 'hidden',
  },
  expander: {
-    color: theme.palette.type === 'light' ? '#222' : '#eee',
+    color: theme.palette.mode === 'light' ? '#222' : '#eee',
    cursor: 'pointer' as 'pointer',
    paddingRight: theme.spacing(0.25),
    userSelect: 'none' as 'none',
@@ -4,7 +4,8 @@ import TreeNodeSubnodes from './TreeNodeSubnodes'
 import TreeNodeTitle from './TreeNodeTitle'
 import { SettingsState } from '../../../reducers/Settings'
 import { styles } from './styles'
-import { Theme, withStyles } from '@material-ui/core/styles'
+import { Theme } from '@mui/material/styles'
+import { withStyles } from '@mui/styles'
 import { TopicViewModel } from '../../../model/TopicViewModel'
 import { treeActions } from '../../../actions'
 import { useAnimationToIndicateTopicUpdate } from './effects/useAnimationToIndicateTopicUpdate'
@@ -35,7 +36,7 @@ function TreeNodeComponent(props: Props) {
  const deleteTopicCallback = useDeleteKeyCallback(treeNode, actions)
  useViewModelSubscriptions(treeNode, nodeRef, setSelected, setCollapsedOverride)
  const animationClass =
-    props.theme.palette.type === 'light' ? props.classes.animationLight : props.classes.animationDark
+    props.theme.palette.mode === 'light' ? props.classes.animationLight : props.classes.animationDark

  useAnimationToIndicateTopicUpdate(
    nodeRef,
@@ -1,5 +1,5 @@
-import { blueGrey } from '@material-ui/core/colors'
-import { Theme } from '@material-ui/core/styles'
+import { blueGrey } from '@mui/material/colors'
+import { Theme } from '@mui/material/styles'

 export const styles = (theme: Theme) => {
  return {
@@ -37,7 +37,7 @@ export const styles = (theme: Theme) => {
      marginLeft: theme.spacing(1.5),
    },
    selected: {
-      backgroundColor: (theme.palette.type === 'light' ? blueGrey[300] : theme.palette.primary.main) + ' !important',
+      backgroundColor: (theme.palette.mode === 'light' ? blueGrey[300] : theme.palette.primary.main) + ' !important',
    },
    hover: {},
    title: {
@@ -49,7 +49,7 @@ export const styles = (theme: Theme) => {
      padding: '1px 4px 0 4px',
      margin: '1px 0px',
      '&:hover': {
-        backgroundColor: theme.palette.type === 'light' ? blueGrey[100] : theme.palette.primary.light,
+        backgroundColor: theme.palette.mode === 'light' ? blueGrey[100] : theme.palette.primary.light,
      },
    },
  }
@@ -1,18 +1,18 @@
-import compareVersions from 'compare-versions'
+import { compareVersions } from 'compare-versions'
 import electron from 'electron'
-import os from 'os'
 import React from 'react'
 import axios from 'axios'
-import Close from '@material-ui/icons/Close'
-import CloudDownload from '@material-ui/icons/CloudDownload'
+import Close from '@mui/icons-material/Close'
+import CloudDownload from '@mui/icons-material/CloudDownload'
 import { AppState } from '../reducers'
 import { bindActionCreators } from 'redux'
 import { connect } from 'react-redux'
-import { green } from '@material-ui/core/colors'
-import { Theme, withStyles } from '@material-ui/core/styles'
+import { green } from '@mui/material/colors'
+import { Theme } from '@mui/material/styles'
+import { withStyles } from '@mui/styles'
 import { updateNotifierActions } from '../actions'

-import { Button, IconButton, Modal, Paper, Snackbar, SnackbarContent, Typography } from '@material-ui/core'
+import { Button, IconButton, Modal, Paper, Snackbar, SnackbarContent, Typography } from '@mui/material'
 import { rendererRpc, getAppVersion } from '../../../events'

 interface Props {
@@ -84,7 +84,7 @@ class UpdateNotifier extends React.PureComponent<Props, State> {
    return res.data as Array<GithubRelease>
  }

-  private onCloseNotification = (event: React.SyntheticEvent<any>, reason: string) => {
+  private onCloseNotification = (event: any, reason: any) => {
    if (reason === 'clickaway') {
      return
    }
@@ -182,9 +182,10 @@ class UpdateNotifier extends React.PureComponent<Props, State> {

  private assetForCurrentPlatform(asset: GithubAsset) {
    let regex: RegExp
-    if (os.platform() === 'darwin') {
+    const platform = this.getPlatform()
+    if (platform === 'darwin') {
      regex = /\.dmg$/
-    } else if (os.platform() === 'win32') {
+    } else if (platform === 'win32') {
      regex = /\.exe$/
    } else {
      regex = /\.AppImage$/
@@ -193,6 +194,14 @@ class UpdateNotifier extends React.PureComponent<Props, State> {
    return regex.test(asset.name)
  }

+  private getPlatform(): string {
+    if (typeof window === 'undefined') return 'linux'
+    const userAgent = window.navigator.userAgent.toLowerCase()
+    if (userAgent.includes('mac')) return 'darwin'
+    if (userAgent.includes('win')) return 'win32'
+    return 'linux'
+  }
+
  private renderDownloads() {
    const latestUpdate = this.state.newerVersions[0]
    if (!latestUpdate || !latestUpdate.assets) {
@@ -1,25 +1,26 @@
 import * as React from 'react'
-import Clear from '@material-ui/icons/Clear'
-import { IconButton, Theme } from '@material-ui/core'
-import { withTheme } from '@material-ui/core/styles'
+import Clear from '@mui/icons-material/Clear'
+import { IconButton, Theme } from '@mui/material'
+import { useTheme } from '@mui/material/styles'

 interface Props {
  value?: string
  action: any
  style?: React.CSSProperties
  variant?: 'primary'
-  theme: Theme
 }

 /**
 * Clear button for text input fields
 */
 function ClearAdornment(props: Props) {
+  const theme = useTheme()
+  
  if (!props.value) {
    return null
  }

-  const color = props.variant === 'primary' ? props.theme.palette.primary.contrastText : undefined
+  const color = props.variant === 'primary' ? theme.palette.primary.contrastText : undefined
  return (
    <IconButton style={{ ...props.style, padding: '1px' }} onClick={props.action}>
      <Clear style={{ color, fontSize: '16px' }} />
@@ -27,4 +28,4 @@ function ClearAdornment(props: Props) {
  )
 }

-export default withTheme(ClearAdornment)
+export default ClearAdornment
@@ -1,11 +1,12 @@
 import * as React from 'react'
-import DeviceHubOutlined from '@material-ui/icons/DeviceHubOutlined'
+import DeviceHubOutlined from '@mui/icons-material/DeviceHubOutlined'
 import { AppState } from '../../reducers'
 import { connect } from 'react-redux'
 import { ConnectionHealth } from '../../reducers/Connection'
-import { green, orange, red } from '@material-ui/core/colors'
-import { withStyles, Theme } from '@material-ui/core/styles'
-import { Tooltip } from '@material-ui/core'
+import { green, orange, red } from '@mui/material/colors'
+import { Theme } from '@mui/material/styles'
+import { withStyles } from '@mui/styles'
+import { Tooltip } from '@mui/material'

 const styles = (theme: Theme) => ({
  offline: {
@@ -65,4 +66,4 @@ const mapStateToProps = (state: AppState) => {
  }
 }

-export default connect(mapStateToProps)(withStyles(styles)(ConnectionHealthIndicator))
+export default connect(mapStateToProps)(withStyles(styles)(ConnectionHealthIndicator) as any)
@@ -1,7 +1,7 @@
 import * as React from 'react'
-import Check from '@material-ui/icons/Check'
+import Check from '@mui/icons-material/Check'
 import CustomIconButton from './CustomIconButton'
-import FileCopy from '@material-ui/icons/FileCopy'
+import FileCopy from '@mui/icons-material/FileCopy'
 import { bindActionCreators } from 'redux'
 import { connect } from 'react-redux'
 import { globalActions } from '../../actions'
@@ -1,12 +1,14 @@
 import * as React from 'react'
-import { IconButton, Tooltip } from '@material-ui/core'
-import { Theme, withStyles } from '@material-ui/core/styles'
+import { IconButton, Tooltip } from '@mui/material'
+import { Theme } from '@mui/material/styles'
+import { withStyles } from '@mui/styles'

 interface Props {
  onClick: any
  tooltip: string
  classes: any
  style?: React.CSSProperties
+  children?: React.ReactNode
 }

 const styles = (theme: Theme) => ({
@@ -1,7 +1,7 @@
 import React from 'react'
 import { AppState } from '../../reducers'
 import { connect } from 'react-redux'
-import { Tooltip } from '@material-ui/core'
+import { Tooltip } from '@mui/material'

 function NumberFormatter(props: { locale: string; value: number; grouping?: boolean }) {
  let formatter: Intl.NumberFormat | undefined
--- a/Show More
+++ b/Show More
Author	SHA1	Message	Date
Thomas Nordquist	affa56f8a2	Merge branch 'master' into copilot/make-byte-limit-configurable	2025-12-21 13:46:34 +01:00
Copilot thomasnordquist Thomas Nordquist	26ed0aadd2	Upgrade to Node.js 24, update dependencies, migrate configs to ES modules, replace ts-node with tsx, upgrade React/Material-UI, and update GitHub Actions (#940 ) ## Update Dependencies, Node.js 24, and Migrate to ES Modules This PR updates the project dependencies, Node.js version, workflows, and migrates from CommonJS to ES modules. ### Checklist #### Phase 1: Assessment and Configuration - [x] Assess current project structure and dependencies - [x] Update Node.js version requirements (>=24 for builds, >=20 for runtime) - [x] Update GitHub workflow files to use Node 24 - [x] Update Dockerfile to use Node 24 #### Phase 2: TypeScript Configuration for ES Modules - [x] Update root tsconfig.json to use ES2020 target with CommonJS modules - [x] Update backend/tsconfig.json to use ES2020 target with CommonJS modules - [x] Update app/tsconfig.json to use ES2020 target with ESNext modules #### Phase 3: Update Dependencies - [x] Update root package.json dependencies to latest compatible versions - [x] Update app/package.json dependencies to latest compatible versions - [x] Update backend/package.json dependencies to latest compatible versions - [x] Run yarn install to update lockfile #### Phase 4: Convert CommonJS to ES Modules - [x] Convert webpack config files to ES modules (.js → .mjs) - [x] Convert prettier.config.js to ES modules - [x] Update TypeScript files with CommonJS require() to use ES imports - [x] Fix breaking changes from dependency API updates #### Phase 5: Replace ts-node with tsx - [x] Replace ts-node with tsx in all package.json scripts - [x] Update root package.json to use tsx for prepare-release and package scripts - [x] Update backend package.json to use tsx with mocha - [x] Update app package.json to use tsx with mocha - [x] Update script shebangs to use tsx - [x] Add tsx to devDependencies, remove ts-node #### Phase 6: Upgrade React and Material-UI - [x] Upgrade React from 16.14.0 to 18.3.1 - [x] Upgrade React-DOM from 16.14.0 to 18.3.1 - [x] Migrate from @material-ui (v4) to @mui/material (v5) - [x] Add @emotion/react and @emotion/styled (required for MUI v5) - [x] Update all import paths from @material-ui/* to @mui/* - [x] Update theme creation from createMuiTheme to createTheme - [x] Update palette.type to palette.mode - [x] Update ReactDOM.render to ReactDOM.createRoot (React 18) - [x] Update ThemeProvider import to use @mui/material/styles - [x] Add @mui/styles for withStyles compatibility - [x] Separate Theme and withStyles imports correctly - [x] Replace fade with alpha in theme styles - [x] Replace ExpansionPanel with Accordion - [x] Fix all component imports from wrong modules - [x] Replace withTheme HOC with useTheme hook - [x] Replace theme.palette.text.hint with theme.palette.text.secondary - [x] Update all Redux reducers for Redux v5 compatibility #### Phase 7: Fix All TypeScript Errors - [x] Fix Dialog disableBackdropClick removal (use onClose handler) - [x] Fix Button classes.label removal (use sx prop) - [x] Fix Select onChange signature (MUI v5 API change) - [x] Fix Snackbar onClose signature (MUI v5 API change) - [x] Fix ClickAwayListener onClickAway signature (MUI v5 API change) - [x] Fix ReactResizeDetector (migrate to useResizeDetector hook) - [x] Fix Redux connect + withStyles type compatibility (use type assertions) - [x] Fix all connected component prop type errors - [x] Add children prop to ErrorBoundary - [x] Add parameter types to callbacks #### Phase 8: Build and Test - [x] Run yarn build - ✅ SUCCESSFUL with 0 errors, 1 minor warning - [x] Run yarn test - ✅ All 27 tests passing (5 app + 22 backend) #### Phase 9: Update All GitHub Actions - [x] Update Node.js to 24 in copilot-setup.yml workflow - [x] Update Node.js to 24 in update-website.yml workflow - [x] Update docker/build-push-action from v5 to v6 - [x] Replace deprecated tibdex/github-app-token@v2 with actions/create-github-app-token@v1 - [x] All other actions already at latest versions (v4 for GitHub actions, v3 for Docker actions) #### Phase 10: Final Validation - [x] All TypeScript compilation errors fixed - [x] All tests passing - [x] Build completes successfully - [x] Clarified Node.js engine requirements per use case - [x] All GitHub Actions updated to latest versions ### Node.js Version Requirements This project has different Node.js requirements depending on the use case: #### Building the Electron App (Root package.json) - Required: Node.js >= 24 - Why: Build tools like @electron/notarize and semantic-release require Node.js 24+ - Affected files: `/package.json` #### Running the Backend/Server (Backend package.json) - Required: Node.js >= 20 - Why: The MQTT server runtime is compatible with Node.js 20+ - Affected files: `/backend/package.json` #### Frontend App (App package.json) - Required: Node.js >= 20 - Why: React and webpack tools are compatible with Node.js 20+ - Affected files: `/app/package.json` ### Summary of All Changes Major Dependency Updates: - TypeScript: 4.5.5 → 5.9.3 - Node.js: >=24 for builds, >=20 for runtime - React: 16.14.0 → 18.3.1 - React-DOM: 16.14.0 → 18.3.1 - Redux: 4.2.1 → 5.0.1 - @material-ui/core → @mui/material 5.18.0 - @material-ui/icons → @mui/icons-material 5.18.0 - mqtt: 4.3.6 → 5.14.1 - axios: 0.28.0 → 1.13.2 - redux-thunk: 2.3.0 → 3.1.0 - electron-builder: 24.13.3 → 26.0.12 - @electron/notarize: 3.1.1 (latest) - semantic-release: 25.0.2 (latest) - react-resize-detector: migrated to useResizeDetector hook - 50+ other dependencies GitHub Actions Updated: - ✅ actions/checkout@v4 (latest) - ✅ actions/setup-node@v4 (latest) - Now uses Node 24 in all workflows - ✅ actions/cache@v4 (latest) - ✅ actions/upload-artifact@v4 (latest) - ✅ docker/build-push-action: v5 → v6 (latest) - ✅ docker/login-action@v3 (latest) - ✅ docker/setup-buildx-action@v3 (latest) - ✅ cycjimmy/semantic-release-action@v4 (latest) - ✅ tibdex/github-app-token@v2 → actions/create-github-app-token@v1 (official replacement for deprecated action) - ✅ stefanzweifel/git-auto-commit-action@v5 (latest) - ✅ hkusu/s3-upload-action@v2 (latest) All TypeScript Errors Fixed: - Removed disableBackdropClick from Dialog (deprecated in MUI v5) - Removed Button classes.label (deprecated in MUI v5) - Updated all event handler signatures to match MUI v5 APIs - Migrated ReactResizeDetector component to useResizeDetector hook - Added type assertions for Redux connect + withStyles compatibility - Fixed all connected component prop passing - Added missing children props to components Final Result: ✅ 0 TypeScript errors ✅ 27/27 tests passing ✅ Build successful ✅ Node 24 for builds, Node 20+ for runtime ✅ All GitHub Actions updated to latest versions ⚠️ 1 minor warning (source map parsing in ace-builds dependency) <!-- START COPILOT ORIGINAL PROMPT --> <details> <summary>Original prompt</summary> > > ---- > > This section details on the original issue you should resolve > > <issue_title>update dependencies</issue_title> > <issue_description>- update to nodejs 24 > - update npm dependencies > - update workflows > - change from commons to esmodules</issue_description> > > ## Comments on the Issue (you are @copilot in this section) > > <comments> > </comments> > </details> <!-- START COPILOT CODING AGENT SUFFIX --> - Fixes thomasnordquist/MQTT-Explorer#939 <!-- START COPILOT CODING AGENT TIPS --> --- 💬 We'd love your input! Share your thoughts on Copilot coding agent in our [2 minute survey](https://gh.io/copilot-coding-agent-survey). --------- Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com> Co-authored-by: thomasnordquist <7721625+thomasnordquist@users.noreply.github.com> Co-authored-by: Thomas Nordquist <thomasnordquist@users.noreply.github.com>	2025-12-21 10:20:08 +01:00
Thomas Nordquist	578bb510f9	Upgrade Node.js version from 20 to 24	2025-12-21 09:59:50 +01:00
Copilot	e725b1d012	Fix expandTopic selector, restore and streamline comprehensive UI tests (#938 )	2025-12-20 23:26:15 +01:00
Copilotandthomasnordquist	c55c3a8245	Fix UI tests: correct expandTopic parameter order and CI workflow (#936 ) Fixes TypeScript compilation errors in UI tests and resolves CI workflow configuration issue. ## Changes Made ### 1. Fixed expandTopic parameter order in ui-tests.spec.ts - Corrected 5 function calls from `expandTopic(page, 'path')` to `expandTopic('path', page)` - Function signature: `expandTopic(path: string, browser: Page)` - Aligns with existing usage in all scenario files (showNumericPlot.ts, publishTopic.ts, etc.) ### 2. Fixed CI workflow configuration - Updated `.github/workflows/tests.yml` to checkout PR code instead of base branch - Added `ref: ${{ github.event.pull_request.head.sha }}` to all 4 checkout actions - The `pull_request_target` event defaults to checking out the base branch; this fix ensures CI tests the PR's code ## Root Cause The CI workflow was testing the base branch (master) which still had the wrong parameter order, while the PR had the correct fix. This caused CI to report TypeScript errors even though the PR code was correct. ## Testing - ✅ TypeScript compilation passes locally (`tsc` and `yarn build`) - ✅ Parameter order matches function signature and codebase conventions - ✅ CI workflow now correctly tests PR code - ✅ All 4 CI jobs (test, ui-tests, demo-video, test-browser) will use corrected code <!-- START COPILOT ORIGINAL PROMPT --> <details> <summary>Original prompt</summary> > > ---- > > This section details on the original issue you should resolve > > <issue_title>Fix tests</issue_title> > <issue_description>- fix backend tests > - fix UI tests</issue_description> > > ## Comments on the Issue (you are @copilot in this section) > > <comments> > </comments> > </details> <!-- START COPILOT CODING AGENT SUFFIX --> - Fixes thomasnordquist/MQTT-Explorer#935 <!-- START COPILOT CODING AGENT TIPS --> --- ✨ Let Copilot coding agent [set things up for you](https://github.com/thomasnordquist/MQTT-Explorer/issues/new?title=✨+Set+up+Copilot+instructions&body=Configure%20instructions%20for%20this%20repository%20as%20documented%20in%20%5BBest%20practices%20for%20Copilot%20coding%20agent%20in%20your%20repository%5D%28https://gh.io/copilot-coding-agent-tips%29%2E%0A%0A%3COnboard%20this%20repo%3E&assignees=copilot) — coding agent works faster and does higher quality work when set up for your repo. --------- Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com> Co-authored-by: thomasnordquist <7721625+thomasnordquist@users.noreply.github.com>	2025-12-20 19:34:34 +01:00
Copilot	92aa2c9fa8	Fix UI test timeouts, TypeScript compilation, dependency compatibility, and backend tests with isolated test suite using per-test mocking (#930 )	2025-12-20 15:09:26 +01:00
copilot-swe-agent[bot]andthomasnordquist	f0533a25db	Adopt EventsV2 structure for setMaxMessageSize event Co-authored-by: thomasnordquist <7721625+thomasnordquist@users.noreply.github.com>	2025-12-20 02:52:13 +00:00
Thomas Nordquist	e0f6f86773	Merge branch 'master' into copilot/make-byte-limit-configurable	2025-12-20 03:46:44 +01:00
Copilot	5a54ba4983	Upgrade Electron to 39.2.7 to fix macOS Tahoe GPU performance regression (#931 )	2025-12-20 03:06:22 +01:00
Copilot	91df6de4d4	Add browser support with Socket.io transport, authentication, performance-optimized IPC, and CI/CD (#925 )	2025-12-20 02:35:34 +01:00
Copilot	8285627c5f	Implement comprehensive UI test suite with meaningful assertions and best practices (#921 )	2025-12-20 02:13:31 +01:00
Thomas Nordquist	55f8b7d2b7	Allow commercial use Updated the license from Creative Commons Attribution-NonCommercial 4.0 to Attribution-ShareAlike 4.0. Adjusted terms and conditions to reflect the new license's requirements.	2025-12-19 23:30:08 +01:00
copilot-swe-agent[bot]andthomasnordquist	de53571b88	Simplify validation to accept any integer >= 20KB Co-authored-by: thomasnordquist <7721625+thomasnordquist@users.noreply.github.com>	2025-12-19 21:17:36 +00:00
copilot-swe-agent[bot]andthomasnordquist	c7021e19ca	Explicitly set unlimited to default when persisting Co-authored-by: thomasnordquist <7721625+thomasnordquist@users.noreply.github.com>	2025-12-19 21:09:11 +00:00
copilot-swe-agent[bot]andthomasnordquist	a84d79ac3a	Fix backend validation to match all frontend size options Co-authored-by: thomasnordquist <7721625+thomasnordquist@users.noreply.github.com>	2025-12-19 21:08:12 +00:00
copilot-swe-agent[bot]andthomasnordquist	a3bca962ae	Change to predefined size options (20KB, 100KB, 1MB, 5MB, Unlimited) Co-authored-by: thomasnordquist <7721625+thomasnordquist@users.noreply.github.com>	2025-12-19 21:06:37 +00:00
Copilot	8f1eeedbaf	Configure comprehensive Copilot instructions for repository best practices (#923 )	2025-12-19 22:01:29 +01:00
copilot-swe-agent[bot]andthomasnordquist	715c50127b	Improve input validation to prevent partial numeric strings Co-authored-by: thomasnordquist <7721625+thomasnordquist@users.noreply.github.com>	2025-12-19 20:59:12 +00:00
copilot-swe-agent[bot]andthomasnordquist	1ad2ed73ec	Improve UX with local state for max message size input Co-authored-by: thomasnordquist <7721625+thomasnordquist@users.noreply.github.com>	2025-12-19 20:57:41 +00:00
copilot-swe-agent[bot]andthomasnordquist	e607d70374	Extract magic numbers to shared constants Co-authored-by: thomasnordquist <7721625+thomasnordquist@users.noreply.github.com>	2025-12-19 20:55:53 +00:00
copilot-swe-agent[bot]andthomasnordquist	1b1558ff12	Improve validation for max message size setting Co-authored-by: thomasnordquist <7721625+thomasnordquist@users.noreply.github.com>	2025-12-19 20:53:11 +00:00
copilot-swe-agent[bot]andthomasnordquist	96b64fcffd	Add configurable max message size setting with UI Co-authored-by: thomasnordquist <7721625+thomasnordquist@users.noreply.github.com>	2025-12-19 20:50:54 +00:00
Copilot	4843b2ec18	Add MCP introspection support for Electron frontend with Copilot agent integration (#916 )	2025-12-19 21:46:43 +01:00
copilot-swe-agent[bot]	1ebb813261	Initial plan	2025-12-19 20:43:20 +00:00