feat(app): Onboarding, Settings-Redesign und Docs für v1.9.0

- Onboarding mit Widget-Toolbar Slide und Gaming Starter Board
- Settings in Darstellung-Modal und schlankes Settings-Panel
- About-Block als fixierten Footer im Settings-Panel
- Dropdown-Optionen an Theme-Farben anpassen
- Projekt-Dokumentation (Architektur, Widget-Schema, Patterns)
- Firefox Update-URL für Store-Veröffentlichung
- Versions-Bump auf 1.9.0 in allen Manifests

.github/FUNDING.yml

@@ -0,0 +1,4 @@
+# These are supported funding model platforms
+
+
+ko_fi: hellionmedia

.gitignore

@@ -16,6 +16,10 @@ dist/
 node_modules/
 /xpi/
 v2-planning.md
+themes-v2.md
+
+# Firefox Update-Manifest (wird auf hellion-media.de gehostet)
+updates.json
 
 # Persönliche Backup-Dateien (nicht ins Repo)
 favorites_*.html

README.md

@@ -1,6 +1,6 @@
-# ⬡ Hellion Dashboard v1.5.2
+# ⬡ Hellion Dashboard v1.9.0
 
-![Version](https://img.shields.io/badge/Version-1.5.2-blue)
+![Version](https://img.shields.io/badge/Version-1.9.0-blue)
 ![JavaScript](https://img.shields.io/badge/JavaScript-Vanilla%20ES2020-F7DF1E?logo=javascript&logoColor=black)
 ![Manifest](https://img.shields.io/badge/Manifest-V3-green)
 ![License](https://img.shields.io/badge/License-CC%20BY--NC--SA%204.0-orange)

docs/architecture.md

@@ -0,0 +1,163 @@
+# Hellion Dashboard — Architecture
+
+## Overview
+
+Hellion Dashboard is a browser extension (NewTab replacement) built with **Vanilla JavaScript ES2020**, **CSS Custom Properties**, and **zero dependencies**. No build step, no framework, no bundler — files are loaded directly via `<script>` tags.
+
+**Storage:** `chrome.storage.local` with `localStorage` fallback.
+**Manifest:** V3 for Chromium browsers, V3 for Firefox (separate manifest).
+
+---
+
+## File Structure
+
+```
+HOM_NewTab_Project/
+├── newtab.html              # Single HTML entry point
+├── manifest.json            # Chrome/Edge/Brave/Vivaldi (MV3)
+├── manifest.firefox.json    # Firefox (MV3)
+├── manifest.opera.json      # Opera/Opera GX (MV3 + workarounds)
+├── src/
+│   ├── css/
+│   │   └── main.css         # All styles, themes, responsive breakpoints
+│   └── js/
+│       ├── storage.js        # Storage abstraction layer
+│       ├── state.js          # Global state, defaults, helpers
+│       ├── themes.js         # Theme definitions & application
+│       ├── boards.js         # Board/bookmark rendering & events
+│       ├── drag.js           # Drag & drop (Pointer Events API)
+│       ├── settings.js       # Settings panel, toggles, theme picker
+│       ├── search.js         # Search bar (Google, DuckDuckGo, Bing)
+│       ├── widgets.js        # Widget manager (registry, drag, resize)
+│       ├── notes.js          # Notes/checklists (multi-instance widgets)
+│       ├── calculator.js     # Calculator widget (single-instance)
+│       ├── timer.js          # Timer/countdown widget (single-instance)
+│       ├── image-ref.js      # Image reference widget (multi-instance)
+│       ├── onboarding.js     # First-run onboarding flow
+│       ├── data.js           # JSON export/import (backup & restore)
+│       ├── app.js            # Init, clock, global events (entry point)
+│       └── dialog.js         # Custom dialog system (alert, confirm)
+├── assets/
+│   ├── icons/                # Extension icons (16-512px)
+│   └── themes/               # Theme background images
+└── docs/                     # Documentation (you are here)
+```
+
+---
+
+## Module Responsibilities
+
+Each module has exactly one responsibility. They communicate through global references (no import/export — this is a browser extension without a bundler).
+
+| Module | Responsibility |
+|---|---|
+| `storage.js` | **Only** place that touches `chrome.storage` / `localStorage`. All other modules go through `Store.get()` / `Store.set()`. |
+| `state.js` | Global `boards` and `settings` arrays, default values, `uid()`, `escHtml()`, `getFaviconUrl()`. |
+| `themes.js` | Theme CSS variable application. 8 themes, each with its own `[data-theme]` block in CSS. |
+| `boards.js` | Renders boards and bookmarks. Event delegation on board containers. |
+| `drag.js` | Board and bookmark reordering via Pointer Events API. |
+| `settings.js` | Settings panel UI, toggle handlers, theme modal, background upload. |
+| `search.js` | Search bar with engine switching (Google, DuckDuckGo, Bing). |
+| `widgets.js` | Widget manager — creates DOM, handles drag/resize/z-index, provides registry. See [widget-schema.md](widget-schema.md). |
+| `notes.js` | Notes and checklists as widgets. Multi-instance (max 5). Notebook sidebar. Also handles widget toolbar events. |
+| `calculator.js` | Calculator widget. Single-instance. Shunting-yard expression parser (no `eval()`). |
+| `timer.js` | Timer/countdown widget. Single-instance. Presets, Web Audio API alarm, tab-title blink. |
+| `image-ref.js` | Image reference widget. Multi-instance (max 3). Canvas API WebP conversion, sessionStorage for image data. |
+| `onboarding.js` | Multi-slide onboarding flow. Gaming starter board opt-in. |
+| `data.js` | JSON export/import with validation. Handles boards, notes, calculator history, timer presets. |
+| `app.js` | Entry point. Calls `init()` on DOMContentLoaded. Clock, global event binding. |
+| `dialog.js` | `HellionDialog.alert()` and `HellionDialog.confirm()` — custom styled dialogs replacing native browser dialogs. |
+
+---
+
+## Init Sequence
+
+```
+DOMContentLoaded
+  → init()
+    → Store.get('boards')          # Load saved boards
+    → Store.get('settings')        # Load saved settings
+    → applySettings()              # Apply theme, toggles, etc.
+    → renderBoards()               # Render all boards
+    → startClock()                 # Start clock/date display
+    → bindGlobalEvents()           # Header buttons, modals
+    → bindSettingsEvents()         # Settings toggles, theme picker
+    → initSearch()                 # Search bar
+    → migrateSticky()              # Legacy sticky note migration
+    → Notes.init()                 # Notes + widget toolbar
+    → Calculator.init()            # Calculator widget
+    → Timer.init()                 # Timer widget
+    → ImageRef.init()              # Image reference widget
+    → initDataButtons()            # Export/import buttons
+    → Onboarding check             # First-run onboarding
+```
+
+---
+
+## Script Load Order
+
+Scripts are loaded in `newtab.html` in dependency order:
+
+```html
+<script src="src/js/dialog.js"></script>
+<script src="src/js/storage.js"></script>
+<script src="src/js/state.js"></script>
+<script src="src/js/themes.js"></script>
+<script src="src/js/boards.js"></script>
+<script src="src/js/drag.js"></script>
+<script src="src/js/settings.js"></script>
+<script src="src/js/search.js"></script>
+<script src="src/js/onboarding.js"></script>
+<script src="src/js/widgets.js"></script>
+<script src="src/js/notes.js"></script>
+<script src="src/js/calculator.js"></script>
+<script src="src/js/timer.js"></script>
+<script src="src/js/image-ref.js"></script>
+<script src="src/js/data.js"></script>
+<script src="src/js/app.js"></script>
+```
+
+**Rule:** A module may only reference modules loaded before it.
+
+---
+
+## Z-Index Hierarchy
+
+| Layer | z-index | Elements |
+|---|---|---|
+| Background | 0-2 | `#bgLayer`, boards |
+| Search bar | 90 | `.search-bar-wrapper` |
+| Widgets + Toolbar | 100+ | `.widget`, `.widget-toolbar` |
+| Header | 100 | `#header` |
+| Settings panel | 200 | `#settingsPanel` |
+| Dialogs / Modals | 300 | `.hellion-dialog-overlay`, modals |
+| Onboarding | 400 | `#onboardingOverlay` |
+
+Widgets use incrementing z-index (`WidgetManager._topZ++`) to stack above each other on click.
+
+---
+
+## Storage Keys
+
+| Key | Type | Content |
+|---|---|---|
+| `boards` | Array | Board objects with bookmarks |
+| `settings` | Object | User preferences (theme, toggles, etc.) |
+| `widgetStates` | Object | All widget data (see [widget-schema.md](widget-schema.md)) |
+| `onboardingDone` | Boolean | Whether onboarding has been completed |
+| `lastBackupReminder` | Number | Timestamp of last backup reminder |
+
+---
+
+## Browser Compatibility
+
+| Browser | Engine | Manifest |
+|---|---|---|
+| Chrome | Chromium MV3 | `manifest.json` |
+| Edge | Chromium MV3 | `manifest.json` |
+| Brave | Chromium MV3 | `manifest.json` |
+| Vivaldi | Chromium MV3 | `manifest.json` |
+| Opera / GX | Chromium MV3 | `manifest.opera.json` |
+| Firefox | Gecko MV3 | `manifest.firefox.json` |
+
+Changes affecting manifest fields must be synchronized across all three manifest files.

docs/patterns.md

@@ -0,0 +1,310 @@
+# Hellion Dashboard — Code Patterns & Conventions
+
+## Core Principles
+
+- **Vanilla JS ES2020** — No frameworks, no TypeScript, no build step
+- **Zero dependencies** — Everything is built from scratch
+- **`createElement` only** — Never use `innerHTML` (XSS prevention)
+- **CSS Custom Properties** — No hardcoded colors, everything through `var(--name)`
+- **Event delegation** — One listener per container, not per element
+- **Storage abstraction** — All storage access through `Store.get()` / `Store.set()`
+
+---
+
+## Pattern: Storage Abstraction
+
+**File:** `src/js/storage.js`
+
+All persistent data goes through the `Store` object. Never access `chrome.storage` or `localStorage` directly.
+
+```javascript
+// Reading
+const boards = await Store.get('boards');       // Returns null if not found
+const settings = await Store.get('settings');
+
+// Writing
+await Store.set('boards', boards);
+await Store.set('settings', settings);
+
+// Quota check (chrome.storage only, 10 MB limit)
+await Store.checkQuota();
+```
+
+**Why?** The `Store` handles the chrome.storage / localStorage fallback transparently. It also provides unified error handling (shows a dialog when storage is full).
+
+---
+
+## Pattern: Event Delegation
+
+Instead of attaching listeners to each element, attach one to the container and use `closest()` to find the target.
+
+```javascript
+// GOOD — one listener, handles all bookmarks
+container.addEventListener('click', (e) => {
+  const bmItem = e.target.closest('.bm-item');
+  if (!bmItem) return;
+  const id = bmItem.dataset.id;
+  // Handle click
+});
+
+// BAD — listener per element
+bookmarks.forEach(bm => {
+  bm.addEventListener('click', handler);  // Don't do this!
+});
+```
+
+**Used in:** `boards.js` (board/bookmark events), `notes.js` (toolbar), `calculator.js` (button grid)
+
+---
+
+## Pattern: createElement over innerHTML
+
+Always build DOM with `document.createElement()`. This prevents XSS and is the project's #1 security rule.
+
+```javascript
+// GOOD
+const link = document.createElement('a');
+link.href = bookmark.url;
+link.textContent = bookmark.title;
+container.appendChild(link);
+
+// BAD — XSS risk!
+container.innerHTML = `<a href="${url}">${title}</a>`;
+```
+
+---
+
+## Pattern: Shared Storage Key
+
+Multiple widget modules share the `widgetStates` key. Every module must read-before-write and preserve other modules' data.
+
+```javascript
+async save() {
+  const data = await Store.get('widgetStates') || {};
+
+  // Write your own data
+  data.yourKey = { /* ... */ };
+
+  // DON'T overwrite — the key already contains other modules' data
+  await Store.set('widgetStates', data);
+}
+```
+
+See [widget-schema.md](widget-schema.md) for the full `widgetStates` structure.
+
+---
+
+## Pattern: Widget Lifecycle Hooks
+
+Single-instance widgets (Calculator, Timer) need to know when they're closed, minimized, or reopened. They wrap `WidgetManager` methods in their `init()`:
+
+```javascript
+async init() {
+  // Wrap close
+  const prevClose = WidgetManager.close;
+  const self = this;
+  WidgetManager.close = function(id) {
+    prevClose.call(WidgetManager, id);
+    if (id === self.WIDGET_ID) {
+      self.onClose();
+    }
+  };
+
+  // Wrap minimize
+  const prevMinimize = WidgetManager.minimize;
+  WidgetManager.minimize = async function(id) {
+    await prevMinimize.call(WidgetManager, id);
+    if (id === self.WIDGET_ID) {
+      self._isOpen = false;
+      await self.save();
+    }
+  };
+}
+```
+
+**Important:** Multiple widgets chain these wraps. Calculator wraps first, Timer wraps Calculator's already-wrapped version, and so on. The chain must not break.
+
+---
+
+## Pattern: Debounced Save
+
+For frequent updates (typing in notes, moving widgets), use debounced saves to avoid excessive storage writes:
+
+```javascript
+_saveTimer: null,
+
+_debouncedSave() {
+  clearTimeout(this._saveTimer);
+  this._saveTimer = setTimeout(() => this.save(), 500);
+}
+
+// Usage: call _debouncedSave() instead of save() for frequent events
+textarea.addEventListener('input', () => {
+  noteData.content = textarea.value;
+  this._debouncedSave();
+});
+```
+
+**Used in:** `notes.js` (text editing), `image-ref.js` (label editing)
+
+---
+
+## Pattern: Theme System
+
+All themes use CSS Custom Properties defined in `[data-theme="name"]` blocks:
+
+```css
+[data-theme="nebula"] {
+  --bg-primary: #0a0e17;
+  --bg-board: rgba(15, 20, 35, 0.65);
+  --text-primary: #e0e6f0;
+  --accent: #7db3ff;
+  --border: rgba(125, 179, 255, 0.12);
+  /* ... more variables */
+}
+```
+
+**Never hardcode colors in JS.** Use CSS classes or variables:
+
+```javascript
+// GOOD — let CSS handle colors
+element.classList.add('active');
+
+// BAD — hardcoded color
+element.style.color = '#7db3ff';
+```
+
+8 themes are available: Nebula, Crescent, Event Horizon, Merchantman, Julia & Jin, SC Sunset, Hellion HUD, Hellion Energy.
+
+---
+
+## Pattern: Onboarding Slides
+
+The onboarding system (`onboarding.js`) uses a data-driven slide array. Each slide is an object with rendering hints:
+
+```javascript
+{
+  hero: '🎮',                    // Large emoji/icon
+  title: 'Slide Title',          // Heading
+  text: 'Description...',        // Optional text paragraph
+  features: ['Item 1', ...],     // Optional bullet list
+  showThemes: true,              // Optional theme grid
+  interactive: 'gaming-board'    // Optional custom buttons
+}
+```
+
+The `_render()` method reads these properties and builds the DOM. To add a new slide, just add an object to the `slides` array.
+
+---
+
+## Pattern: Dialog System
+
+Custom dialogs replace native `alert()` and `confirm()`:
+
+```javascript
+// Alert (informational)
+await HellionDialog.alert('Message text', {
+  type: 'info',        // 'info', 'success', 'warning', 'danger'
+  title: 'Title'
+});
+
+// Confirm (yes/no)
+const ok = await HellionDialog.confirm('Are you sure?', {
+  type: 'danger',
+  title: 'Delete',
+  confirmText: 'Delete',     // Custom button text
+  cancelText: 'Cancel'
+});
+if (ok) { /* user confirmed */ }
+```
+
+---
+
+## Pattern: Pointer Events for Drag
+
+Widget dragging and board reordering use the Pointer Events API (not mouse events):
+
+```javascript
+element.addEventListener('pointerdown', (e) => {
+  element.setPointerCapture(e.pointerId);
+
+  function onMove(ev) {
+    // Update position
+  }
+
+  function onUp() {
+    element.releasePointerCapture(e.pointerId);
+    element.removeEventListener('pointermove', onMove);
+    element.removeEventListener('pointerup', onUp);
+  }
+
+  element.addEventListener('pointermove', onMove);
+  element.addEventListener('pointerup', onUp);
+});
+```
+
+**Why Pointer Events over Mouse Events?** They work with both mouse and touch, and `setPointerCapture` ensures events continue even if the cursor leaves the element.
+
+---
+
+## Pattern: Canvas API Image Processing
+
+The image reference widget converts uploaded images to WebP for smaller size:
+
+```javascript
+_processFile(file) {
+  return new Promise((resolve, reject) => {
+    const objectUrl = URL.createObjectURL(file);
+    const img = new Image();
+
+    img.onload = () => {
+      const canvas = document.createElement('canvas');
+      canvas.width = img.width;
+      canvas.height = img.height;
+      const ctx = canvas.getContext('2d');
+      ctx.drawImage(img, 0, 0);
+      const webpUrl = canvas.toDataURL('image/webp', 0.85);
+      URL.revokeObjectURL(objectUrl);
+      resolve(webpUrl);
+    };
+
+    img.onerror = () => {
+      URL.revokeObjectURL(objectUrl);
+      reject(new Error('Image could not be loaded'));
+    };
+
+    img.src = objectUrl;
+  });
+}
+```
+
+**Important:** Always call `URL.revokeObjectURL()` to free memory.
+
+---
+
+## Coding Rules Summary
+
+| Rule | Rationale |
+|---|---|
+| `createElement` only, never `innerHTML` | XSS prevention |
+| All storage through `Store` | Browser compatibility |
+| CSS variables, no hardcoded colors | Theme support |
+| Event delegation | Performance, dynamic content |
+| `const`/`let`, never `var` | Block scoping |
+| No external dependencies | Extension simplicity |
+| No build step | Direct development |
+| JSDoc comments on public functions | Documentation |
+| URL validation before `href` | Security |
+| Error handling on storage operations | Graceful failure |
+
+---
+
+## Manifest Synchronization
+
+Three manifest files must stay in sync:
+
+- `manifest.json` — Chrome, Edge, Brave, Vivaldi
+- `manifest.firefox.json` — Firefox
+- `manifest.opera.json` — Opera, Opera GX
+
+When changing version numbers, permissions, or content script entries, update all three files.

docs/widget-schema.md

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+# Hellion Dashboard — Widget Schema
+
+## Overview
+
+The widget system provides draggable, resizable floating panels managed by `WidgetManager` (`src/js/widgets.js`). Each widget type has its own module that handles content rendering and state management.
+
+---
+
+## Widget Types
+
+| Type | Module | Instance | Max | Storage |
+|---|---|---|---|---|
+| `note` | `notes.js` | Multi | 5 | Persistent (`widgetStates.notes`) |
+| `calculator` | `calculator.js` | Single | 1 | Persistent (`widgetStates.calculator`) |
+| `timer` | `timer.js` | Single | 1 | Persistent (`widgetStates.timer`) |
+| `image` | `image-ref.js` | Multi | 3 | Meta: persistent, Image data: sessionStorage |
+
+---
+
+## WidgetManager API
+
+### `create(type, config) → string`
+
+Creates a widget and appends it to the DOM.
+
+```javascript
+const id = WidgetManager.create('note', {
+  id: 'note_abc123',       // Optional, auto-generated if omitted
+  title: 'My Note',        // Default: 'Note'
+  x: 120,                  // Left position in px
+  y: 80,                   // Top position in px
+  width: 280,              // Width in px (min: 200)
+  height: 220,             // Height in px (min: 150)
+  open: true               // Visible state (default: true)
+});
+```
+
+### `getBody(id) → HTMLElement | null`
+
+Returns the `.widget-body` element for content rendering.
+
+```javascript
+const body = WidgetManager.getBody('widget_calculator');
+if (body) Calculator.renderBody(body);
+```
+
+### `getState(id) → Object | null`
+
+Returns the current widget state (position, size, open status).
+
+```javascript
+const state = WidgetManager.getState('widget_timer');
+// → { id, type, title, x, y, width, height, open }
+```
+
+### `close(id)`
+
+Permanently removes a widget from the DOM and registry.
+
+### `minimize(id)`
+
+Hides a widget with animation. Widget remains in registry with `open: false`.
+
+### `openWidget(id)`
+
+Restores a minimized widget with animation.
+
+### `bringToFront(id)`
+
+Increments z-index to bring widget above all others.
+
+### `save() → Array`
+
+Returns an array of all `type: 'note'` widget states. Used by `Notes.save()` to merge with note content data.
+
+### `restore(renderCallback)`
+
+Loads widget states from storage and recreates all note widgets. Only handles notes — single-instance widgets (calculator, timer) restore themselves in their own `init()`.
+
+---
+
+## Shared Storage Key: `widgetStates`
+
+All widget modules share a single storage key. Each module's `save()` method must preserve other modules' data.
+
+```javascript
+// Structure of widgetStates
+{
+  notes: [
+    {
+      id: 'note_abc123',
+      title: 'My Note',
+      content: 'Hello world',
+      template: 'text',         // 'text' or 'checklist'
+      x: 120, y: 80,
+      width: 280, height: 220,
+      open: true,
+      checklistItems: [],       // For checklist template
+      checkedItems: []          // Checked item IDs
+    }
+  ],
+  calculator: {
+    x: 400, y: 120,
+    width: 280, height: 400,
+    open: false,
+    history: [
+      { expr: '2 + 3', result: '5' }
+    ]
+  },
+  timer: {
+    x: 600, y: 80,
+    width: 260, height: 360,
+    open: false,
+    muted: false,
+    presets: [
+      { name: 'Forschung', seconds: 2700 }
+    ]
+  },
+  imageRef: {
+    images: [
+      {
+        id: 'image_0',
+        label: 'Bauplan',
+        x: 200, y: 120,
+        width: 320, height: 280,
+        open: true
+      }
+    ]
+  }
+}
+```
+
+### Save Pattern — Preserving Other Modules' Data
+
+Every module that saves to `widgetStates` must read existing data first and preserve keys it doesn't own:
+
+```javascript
+// Example from notes.js
+async save() {
+  const existing = await Store.get(this.STORAGE_KEY);
+  const saveData = { notes: mergedNotes };
+
+  // Preserve other modules
+  if (existing && existing.calculator) saveData.calculator = existing.calculator;
+  if (existing && existing.timer) saveData.timer = existing.timer;
+  if (existing && existing.imageRef) saveData.imageRef = existing.imageRef;
+
+  await Store.set(this.STORAGE_KEY, saveData);
+}
+```
+
+---
+
+## Creating a New Widget Type
+
+### Step 1: Choose Single or Multi-Instance
+
+- **Single-instance** (like Calculator, Timer): One widget with a fixed ID. `toggle()` opens/closes.
+- **Multi-instance** (like Notes, ImageRef): Multiple widgets with dynamic IDs. `create()` adds new ones.
+
+### Step 2: Create the Module (`src/js/your-widget.js`)
+
+```javascript
+const YourWidget = {
+  WIDGET_ID: 'widget_yourwidget',   // Fixed ID for single-instance
+  STORAGE_KEY: 'widgetStates',
+  _isOpen: false,
+
+  // Load state from storage
+  async load() {
+    const data = await Store.get(this.STORAGE_KEY);
+    if (data && data.yourWidget) {
+      // Restore your state
+    }
+  },
+
+  // Save state, preserving other modules
+  async save() {
+    const data = await Store.get(this.STORAGE_KEY) || {};
+    if (data.notes === undefined) data.notes = [];
+
+    const widgetState = WidgetManager.getState(this.WIDGET_ID);
+    data.yourWidget = {
+      x: widgetState ? widgetState.x : 400,
+      y: widgetState ? widgetState.y : 120,
+      width: widgetState ? widgetState.width : 280,
+      height: widgetState ? widgetState.height : 300,
+      open: this._isOpen,
+      // ... your custom data
+    };
+
+    await Store.set(this.STORAGE_KEY, data);
+  },
+
+  // Open widget
+  async open() {
+    if (this._isOpen) {
+      WidgetManager.bringToFront(this.WIDGET_ID);
+      return;
+    }
+
+    const data = await Store.get(this.STORAGE_KEY);
+    const saved = (data && data.yourWidget) ? data.yourWidget : {};
+
+    WidgetManager.create('yourwidget', {
+      id: this.WIDGET_ID,
+      title: 'Your Widget',
+      x: saved.x || 400,
+      y: saved.y || 120,
+      width: saved.width || 280,
+      height: saved.height || 300,
+      open: true
+    });
+
+    const body = WidgetManager.getBody(this.WIDGET_ID);
+    if (body) this.renderBody(body);
+
+    this._isOpen = true;
+    await this.save();
+  },
+
+  // Toggle open/close
+  async toggle() {
+    if (this._isOpen) {
+      const entry = WidgetManager._widgets.get(this.WIDGET_ID);
+      if (entry && entry.state.open) {
+        await WidgetManager.minimize(this.WIDGET_ID);
+        this._isOpen = false;
+        await this.save();
+      } else if (entry) {
+        await WidgetManager.openWidget(this.WIDGET_ID);
+        this._isOpen = true;
+        await this.save();
+      }
+    } else {
+      await this.open();
+    }
+  },
+
+  // Render widget content
+  renderBody(bodyEl) {
+    bodyEl.textContent = '';
+    // Build your UI with createElement (never innerHTML!)
+  },
+
+  // Initialize and hook into lifecycle
+  async init() {
+    await this.load();
+
+    // Restore if was open last time
+    const data = await Store.get(this.STORAGE_KEY);
+    if (data && data.yourWidget && data.yourWidget.open) {
+      await this.open();
+    }
+
+    // Hook into close event
+    const self = this;
+    const prevClose = WidgetManager.close;
+    WidgetManager.close = function(id) {
+      prevClose.call(WidgetManager, id);
+      if (id === self.WIDGET_ID) {
+        self._isOpen = false;
+        self.save();
+      }
+    };
+
+    // Hook into minimize event
+    const prevMinimize = WidgetManager.minimize;
+    WidgetManager.minimize = async function(id) {
+      await prevMinimize.call(WidgetManager, id);
+      if (id === self.WIDGET_ID) {
+        self._isOpen = false;
+        await self.save();
+      }
+    };
+
+    // Hook into open event
+    const prevOpen = WidgetManager.openWidget;
+    WidgetManager.openWidget = async function(id) {
+      await prevOpen.call(WidgetManager, id);
+      if (id === self.WIDGET_ID) {
+        self._isOpen = true;
+        const body = WidgetManager.getBody(self.WIDGET_ID);
+        if (body && body.children.length === 0) {
+          self.renderBody(body);
+        }
+        await self.save();
+      }
+    };
+  }
+};
+```
+
+### Step 3: Integration Checklist
+
+1. **`newtab.html`** — Add `<script>` tag (after `widgets.js`, before `data.js`)
+2. **`newtab.html`** — Add toolbar button: `<button class="widget-toolbar-btn" data-action="your-action">`
+3. **`notes.js`** — Add toolbar handler in `initToolbar()`: `} else if (action === 'your-action') { YourWidget.toggle(); }`
+4. **`notes.js`** — Preserve your data in `save()`: `if (existing && existing.yourWidget) saveData.yourWidget = existing.yourWidget;`
+5. **`app.js`** — Add `await YourWidget.init();` to the init sequence
+6. **`src/css/main.css`** — Add widget-specific CSS styles
+7. **`data.js`** — Add export/import logic (if data should be included in backups)
+
+---
+
+## Widget DOM Structure
+
+Every widget created by `WidgetManager.create()` has this structure:
+
+```html
+<div class="widget" data-widget-id="widget_abc123"
+     style="left: 120px; top: 80px; width: 280px; height: 220px;">
+  <div class="widget-header">
+    <span class="widget-title">Title</span>
+    <div class="widget-actions">
+      <button class="widget-btn widget-minimize">─</button>
+      <button class="widget-btn widget-close">✕</button>
+    </div>
+  </div>
+  <div class="widget-body">
+    <!-- Your content goes here (via renderBody) -->
+  </div>
+  <div class="widget-resize-handle"></div>
+</div>
+```
+
+- **Header** is the drag handle (Pointer Events)
+- **Title** supports double-click to edit (contentEditable, max 20 chars)
+- **Body** is where your module renders content
+- **Resize handle** appears on hover (bottom-right corner)

manifest.firefox.json

@@ -1,7 +1,7 @@
 {
   "manifest_version": 3,
   "name": "Hellion NewTab",
-  "version": "1.5.2",
+  "version": "1.9.0",
   "description": "Personal bookmark dashboard — local, private, no account needed. By Hellion Online Media.",
   "author": "Hellion Online Media - Florian Wathling",
   "homepage_url": "https://hellion-media.de",
@@ -18,6 +18,7 @@
   "browser_specific_settings": {
     "gecko": {
       "id": "hellion-newtab@hellion-media.de",
+      "update_url": "https://hellion-media.de/extensions/firefox/updates.json",
       "strict_min_version": "142.0",
       "data_collection_permissions": {
         "required": [

manifest.json

@@ -1,7 +1,7 @@
 {
   "manifest_version": 3,
   "name": "Hellion NewTab",
-  "version": "1.5.2",
+  "version": "1.9.0",
   "description": "Personal bookmark dashboard — local, private, no account needed. By Hellion Online Media.",
   "author": "Hellion Online Media - Florian Wathling",
   "homepage_url": "https://hellion-media.de",

manifest.opera.json

@@ -1,7 +1,7 @@
 {
   "manifest_version": 3,
   "name": "Hellion Dashboard (GX Native)",
-  "version": "1.5.2",
+  "version": "1.9.0",
   "description": "Ersetzt die Opera GX Startseite durch dein persönliches, leistungsoptimiertes Hellion Dashboard. Schnell, sauber und werbefrei.",
   "author": "Hellion Online Media - Florian Wathling",
   "homepage_url": "https://hellion-media.de",

newtab.html

@@ -35,9 +35,9 @@
         <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><path d="M12 20h9"/><path d="M16.5 3.5a2.121 2.121 0 013 3L7 19l-4 1 1-4L16.5 3.5z"/></svg>
         Note
       </button>
-      <button class="btn-icon" id="btnTheme" title="Theme wählen">
+      <button class="btn-icon" id="btnTheme" title="Darstellung & Theme">
         <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><path d="M12 2a10 10 0 100 20 4 4 0 01-1-7.9 1 1 0 011-.1h1a2 2 0 002-2V7a5 5 0 00-3-4.5"/><circle cx="7" cy="10" r="1.5"/><circle cx="13" cy="6" r="1.5"/><circle cx="17" cy="10" r="1.5"/><circle cx="9" cy="17" r="1.5"/></svg>
-        Theme
+        Darstellung
       </button>
       <button class="btn-icon" id="btnSettings" title="Einstellungen">
         <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><circle cx="12" cy="12" r="3"/><path d="M19.4 15a1.65 1.65 0 00.33 1.82l.06.06a2 2 0 010 2.83 2 2 0 01-2.83 0l-.06-.06a1.65 1.65 0 00-1.82-.33 1.65 1.65 0 00-1 1.51V21a2 2 0 01-4 0v-.09A1.65 1.65 0 009 19.4a1.65 1.65 0 00-1.82.33l-.06.06a2 2 0 01-2.83-2.83l.06-.06A1.65 1.65 0 004.68 15a1.65 1.65 0 00-1.51-1H3a2 2 0 010-4h.09A1.65 1.65 0 004.6 9a1.65 1.65 0 00-.33-1.82l-.06-.06a2 2 0 012.83-2.83l.06.06A1.65 1.65 0 009 4.68a1.65 1.65 0 001-1.51V3a2 2 0 014 0v.09a1.65 1.65 0 001 1.51 1.65 1.65 0 001.82-.33l.06-.06a2 2 0 012.83 2.83l-.06.06A1.65 1.65 0 0019.4 9a1.65 1.65 0 001.51 1H21a2 2 0 010 4h-.09a1.65 1.65 0 00-1.51 1z"/></svg>
@@ -67,6 +67,15 @@
     <button class="widget-toolbar-btn" data-action="new-checklist" title="Checkliste erstellen">
       <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><path d="M9 11l3 3L22 4"/><path d="M21 12v7a2 2 0 01-2 2H5a2 2 0 01-2-2V5a2 2 0 012-2h11"/></svg>
     </button>
+    <button class="widget-toolbar-btn" data-action="calculator" title="Taschenrechner">
+      <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><rect x="4" y="2" width="16" height="20" rx="2"/><line x1="8" y1="6" x2="16" y2="6"/><circle cx="8" cy="10" r="0.5"/><circle cx="12" cy="10" r="0.5"/><circle cx="16" cy="10" r="0.5"/><circle cx="8" cy="14" r="0.5"/><circle cx="12" cy="14" r="0.5"/><circle cx="16" cy="14" r="0.5"/><circle cx="8" cy="18" r="0.5"/><circle cx="12" cy="18" r="0.5"/><circle cx="16" cy="18" r="0.5"/></svg>
+    </button>
+    <button class="widget-toolbar-btn" data-action="timer" title="Timer">
+      <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><circle cx="12" cy="13" r="8"/><path d="M12 9v4l2 2"/><path d="M5 3l2 2"/><path d="M19 3l-2 2"/><line x1="12" y1="1" x2="12" y2="3"/></svg>
+    </button>
+    <button class="widget-toolbar-btn hidden" data-action="image-ref" title="Bild-Referenz">
+      <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><rect x="3" y="3" width="18" height="18" rx="2"/><circle cx="8.5" cy="8.5" r="1.5"/><path d="M21 15l-5-5L5 21"/></svg>
+    </button>
     <button class="widget-toolbar-btn" data-action="notebook" title="Alle Notes">
       <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><path d="M4 19.5A2.5 2.5 0 016.5 17H20"/><path d="M6.5 2H20v20H6.5A2.5 2.5 0 014 19.5v-15A2.5 2.5 0 016.5 2z"/></svg>
     </button>
@@ -96,84 +105,11 @@
   <div class="panel-overlay" id="settingsOverlay"></div>
   <aside class="settings-panel" id="settingsPanel">
     <div class="panel-header">
-      <span>Settings</span>
+      <span>Einstellungen</span>
       <button class="btn-close" id="btnCloseSettings">✕</button>
     </div>
     <div class="panel-body">
 
-      <!-- APPEARANCE -->
-      <section class="settings-section" data-section="appearance">
-        <button class="settings-section-title" type="button">
-          <span class="section-chevron">▸</span>
-          APPEARANCE
-        </button>
-        <div class="section-content">
-          <div class="setting-row">
-            <div class="setting-info">
-              <span class="setting-label">Compact mode</span>
-              <span class="setting-desc">Reduce spacing to show more bookmarks</span>
-            </div>
-            <label class="toggle"><input type="checkbox" id="settingCompact" /><span class="slider"></span></label>
-          </div>
-          <div class="setting-row">
-            <div class="setting-info">
-              <span class="setting-label">Shorten long titles</span>
-              <span class="setting-desc">Shorten title to one line with "…"</span>
-            </div>
-            <label class="toggle"><input type="checkbox" id="settingShorten" /><span class="slider"></span></label>
-          </div>
-        </div>
-      </section>
-
-      <!-- BEHAVIOR -->
-      <section class="settings-section" data-section="behavior">
-        <button class="settings-section-title" type="button">
-          <span class="section-chevron">▸</span>
-          BEHAVIOR
-        </button>
-        <div class="section-content">
-          <div class="setting-row">
-            <div class="setting-info">
-              <span class="setting-label">Open links in new tab</span>
-              <span class="setting-desc">Open bookmarks in a new browser tab</span>
-            </div>
-            <label class="toggle"><input type="checkbox" id="settingNewTab" checked /><span class="slider"></span></label>
-          </div>
-          <div class="setting-row">
-            <div class="setting-info">
-              <span class="setting-label">Show bookmark descriptions</span>
-              <span class="setting-desc">Display saved descriptions below bookmark titles</span>
-            </div>
-            <label class="toggle"><input type="checkbox" id="settingShowDesc" /><span class="slider"></span></label>
-          </div>
-          <div class="setting-row">
-            <div class="setting-info">
-              <span class="setting-label">Hide extra bookmarks in long boards</span>
-              <span class="setting-desc">Automatically hides extra bookmarks in long boards</span>
-            </div>
-            <label class="toggle"><input type="checkbox" id="settingHideExtra" /><span class="slider"></span></label>
-          </div>
-          <div class="setting-row" id="visibleCountRow">
-            <div class="setting-info">
-              <span class="setting-label">Visible bookmarks before hide</span>
-              <span class="setting-desc">Choose how many bookmarks are shown</span>
-            </div>
-            <select class="select-input" id="settingVisibleCount">
-              <option value="5">5</option>
-              <option value="10" selected>10</option>
-              <option value="20">20</option>
-            </select>
-          </div>
-          <div class="setting-row">
-            <div class="setting-info">
-              <span class="setting-label">Suchleiste anzeigen</span>
-              <span class="setting-desc">Suchleiste unter dem Header ein/aus</span>
-            </div>
-            <label class="toggle"><input type="checkbox" id="settingShowSearch" checked /><span class="slider"></span></label>
-          </div>
-        </div>
-      </section>
-
       <!-- WIDGETS -->
       <section class="settings-section" data-section="widgets">
         <button class="settings-section-title" type="button">
@@ -184,48 +120,48 @@
           <div class="setting-row">
             <div class="setting-info">
               <span class="setting-label">Toolbar-Position</span>
-              <span class="setting-desc">Widget-Toolbar links oder rechts</span>
+              <span class="setting-desc">Widget-Toolbar links oder rechts anzeigen</span>
             </div>
             <select class="select-input" id="settingToolbarPos">
               <option value="right" selected>Rechts</option>
               <option value="left">Links</option>
             </select>
           </div>
+          <div class="setting-row">
+            <div class="setting-info">
+              <span class="setting-label">Bild-Referenz Widgets</span>
+              <span class="setting-desc">Bilder als Referenz anzeigen (nur aktuelle Session)</span>
+            </div>
+            <label class="toggle">
+              <input type="checkbox" id="settingImageRef">
+              <span class="slider"></span>
+            </label>
+          </div>
         </div>
       </section>
 
-      <!-- DATA -->
+      <!-- DATEN & HILFE -->
       <section class="settings-section" data-section="data">
         <button class="settings-section-title" type="button">
           <span class="section-chevron">▸</span>
-          DATA
+          DATEN & HILFE
         </button>
         <div class="section-content">
           <div class="setting-row">
             <div class="setting-info">
-              <span class="setting-label">Export Boards</span>
-              <span class="setting-desc">Alle Boards als JSON sichern</span>
+              <span class="setting-label">Backup exportieren</span>
+              <span class="setting-desc">Alle Boards, Notes und Einstellungen als JSON sichern</span>
             </div>
             <button class="btn-small" id="btnExportJSON">Export</button>
           </div>
           <div class="setting-row">
             <div class="setting-info">
-              <span class="setting-label">Import Boards</span>
+              <span class="setting-label">Backup importieren</span>
               <span class="setting-desc">JSON-Backup wiederherstellen</span>
             </div>
             <button class="btn-small" id="btnImportJSON">Import</button>
             <input type="file" id="jsonImportInput" accept=".json" class="hidden" />
           </div>
-        </div>
-      </section>
-
-      <!-- HELP -->
-      <section class="settings-section" data-section="help">
-        <button class="settings-section-title" type="button">
-          <span class="section-chevron">▸</span>
-          HELP
-        </button>
-        <div class="section-content">
           <div class="setting-row">
             <div class="setting-info">
               <span class="setting-label">Onboarding wiederholen</span>
@@ -236,16 +172,30 @@
         </div>
       </section>
 
-      <!-- ABOUT / IMPRESSUM -->
-      <section class="settings-section" data-section="about">
-        <button class="settings-section-title" type="button">
+      <!-- DANGER ZONE -->
+      <section class="settings-section" data-section="danger">
+        <button class="settings-section-title danger" type="button">
           <span class="section-chevron">▸</span>
-          ABOUT
+          DANGER ZONE
         </button>
         <div class="section-content">
+          <div class="setting-row">
+            <div class="setting-info">
+              <span class="setting-label">Alles zurücksetzen</span>
+              <span class="setting-desc">Löscht alle Boards, Notes und Einstellungen</span>
+            </div>
+            <button class="btn-danger" id="btnResetAll">Reset</button>
+          </div>
+        </div>
+      </section>
+
+    </div>
+
+    <!-- ABOUT — fixiert am unteren Rand -->
+    <div class="panel-footer">
       <div class="about-block">
         <div class="about-logo">⬡ HELLION NEWTAB</div>
-            <div class="about-version">Version 1.5.2 · by Hellion Online Media</div>
+        <div class="about-version">Version 1.9.0 · by Hellion Online Media</div>
 
         <div class="about-links">
           <a href="https://hellion-media.de/impressum" target="_blank" class="about-link">
@@ -309,33 +259,13 @@
         </div>
       </div>
     </div>
-      </section>
-
-      <!-- DANGER ZONE -->
-      <section class="settings-section" data-section="danger">
-        <button class="settings-section-title danger" type="button">
-          <span class="section-chevron">▸</span>
-          DANGER ZONE
-        </button>
-        <div class="section-content">
-          <div class="setting-row">
-            <div class="setting-info">
-              <span class="setting-label">Reset all data</span>
-              <span class="setting-desc">Deletes all boards and bookmarks</span>
-            </div>
-            <button class="btn-danger" id="btnResetAll">Reset</button>
-          </div>
-        </div>
-      </section>
-
-    </div>
   </aside>
 
   <!-- THEME PICKER MODAL -->
   <div class="modal-overlay" id="themeOverlay">
     <div class="theme-modal" id="themeModal">
       <div class="modal-header">
-        <span>Theme wählen</span>
+        <span>Darstellung</span>
         <button class="btn-close" id="btnCloseTheme">✕</button>
       </div>
       <div class="theme-grid">
@@ -381,27 +311,83 @@
         </div>
       </div>
       <div class="theme-modal-section">
-        <h3 class="settings-section-title">BACKGROUND</h3>
+        <h3 class="settings-section-title">HINTERGRUND</h3>
         <div class="setting-row">
           <div class="setting-info">
-            <span class="setting-label">Background image URL</span>
-            <span class="setting-desc">Custom wallpaper URL</span>
+            <span class="setting-label">Bild-URL</span>
+            <span class="setting-desc">Eigenes Hintergrundbild per URL</span>
           </div>
-          <button class="btn-small" id="btnChangeBg">Change</button>
+          <button class="btn-small" id="btnChangeBg">Ändern</button>
         </div>
         <div class="setting-row hidden" id="bgInputRow">
-          <input type="text" class="text-input full-width" id="bgUrlInput" placeholder="https://... or leave empty for default" />
-          <button class="btn-small" id="btnApplyBg">Apply</button>
+          <input type="text" class="text-input full-width" id="bgUrlInput" placeholder="https://... oder leer für Standard" />
+          <button class="btn-small" id="btnApplyBg">Übernehmen</button>
         </div>
         <div class="setting-row">
           <div class="setting-info">
-            <span class="setting-label">Background file upload</span>
-            <span class="setting-desc">Use a local image as background</span>
+            <span class="setting-label">Datei hochladen</span>
+            <span class="setting-desc">Lokales Bild als Hintergrund verwenden</span>
           </div>
           <button class="btn-small" id="btnBgFile">Upload</button>
           <input type="file" id="bgFileInput" accept="image/*" class="hidden" />
         </div>
       </div>
+      <div class="theme-modal-section">
+        <h3 class="settings-section-title">DARSTELLUNG</h3>
+        <div class="setting-row">
+          <div class="setting-info">
+            <span class="setting-label">Kompaktmodus</span>
+            <span class="setting-desc">Weniger Abstand für mehr Bookmarks</span>
+          </div>
+          <label class="toggle"><input type="checkbox" id="settingCompact" /><span class="slider"></span></label>
+        </div>
+        <div class="setting-row">
+          <div class="setting-info">
+            <span class="setting-label">Lange Titel kürzen</span>
+            <span class="setting-desc">Titel auf eine Zeile mit „…" kürzen</span>
+          </div>
+          <label class="toggle"><input type="checkbox" id="settingShorten" /><span class="slider"></span></label>
+        </div>
+        <div class="setting-row">
+          <div class="setting-info">
+            <span class="setting-label">Suchleiste anzeigen</span>
+            <span class="setting-desc">Suchleiste unter dem Header ein/aus</span>
+          </div>
+          <label class="toggle"><input type="checkbox" id="settingShowSearch" checked /><span class="slider"></span></label>
+        </div>
+        <div class="setting-row">
+          <div class="setting-info">
+            <span class="setting-label">Links in neuem Tab</span>
+            <span class="setting-desc">Bookmarks in neuem Browser-Tab öffnen</span>
+          </div>
+          <label class="toggle"><input type="checkbox" id="settingNewTab" checked /><span class="slider"></span></label>
+        </div>
+        <div class="setting-row">
+          <div class="setting-info">
+            <span class="setting-label">Beschreibungen anzeigen</span>
+            <span class="setting-desc">Gespeicherte Beschreibung unter Bookmarks</span>
+          </div>
+          <label class="toggle"><input type="checkbox" id="settingShowDesc" /><span class="slider"></span></label>
+        </div>
+        <div class="setting-row">
+          <div class="setting-info">
+            <span class="setting-label">Bookmarks ausblenden</span>
+            <span class="setting-desc">Überzählige Bookmarks in langen Boards verstecken</span>
+          </div>
+          <label class="toggle"><input type="checkbox" id="settingHideExtra" /><span class="slider"></span></label>
+        </div>
+        <div class="setting-row" id="visibleCountRow">
+          <div class="setting-info">
+            <span class="setting-label">Sichtbare Bookmarks</span>
+            <span class="setting-desc">Anzahl vor dem Ausblenden</span>
+          </div>
+          <select class="select-input" id="settingVisibleCount">
+            <option value="5">5</option>
+            <option value="10" selected>10</option>
+            <option value="20">20</option>
+          </select>
+        </div>
+      </div>
     </div>
   </div>
 
@@ -475,6 +461,9 @@
   <script src="src/js/search.js"></script>
   <script src="src/js/widgets.js"></script>
   <script src="src/js/notes.js"></script>
+  <script src="src/js/calculator.js"></script>
+  <script src="src/js/timer.js"></script>
+  <script src="src/js/image-ref.js"></script>
   <script src="src/js/data.js"></script>
   <!-- Onboarding -->
   <script src="src/js/onboarding.js"></script>

src/css/main.css

@@ -537,7 +537,13 @@ body.show-desc .bm-desc { display: block; }
   font-family: var(--font-display); font-size: 15px; font-weight: 600;
   letter-spacing: 2px; color: var(--accent); text-transform: uppercase;
 }
-.panel-body { flex: 1; overflow-y: auto; padding: 12px 0; scrollbar-width: thin; scrollbar-color: var(--border) transparent; }
+.panel-body { flex: 1; overflow-y: auto; padding: 12px 0; scrollbar-width: thin; scrollbar-color: var(--border) transparent; min-height: 0; }
+.panel-footer {
+  flex-shrink: 0; border-top: 1px solid var(--border);
+  max-height: 45vh; overflow-y: auto;
+  scrollbar-width: thin; scrollbar-color: var(--border) transparent;
+}
+.panel-footer .about-block { padding: 12px 18px 16px; }
 
 .settings-section { margin-bottom: 4px; }
 .settings-section-title {
@@ -639,11 +645,12 @@ body.show-desc .bm-desc { display: block; }
 
 /* INPUTS */
 .select-input {
-  padding: 5px 8px; background: rgba(255,255,255,0.06);
+  padding: 5px 8px; background: var(--bg-board, rgba(255,255,255,0.06));
   border: 1px solid var(--border); border-radius: var(--radius-sm);
   color: var(--text-primary); font-family: var(--font-body); font-size: 12px;
   cursor: pointer; min-width: 70px;
 }
+.select-input option { background: var(--bg-primary, #0a0e17); color: var(--text-primary); }
 .select-input:focus { outline: none; border-color: var(--border-accent); }
 
 .text-input {
@@ -908,7 +915,7 @@ body.show-desc .bm-desc { display: block; }
    ============================================ */
 .widget {
   position: fixed;
-  z-index: 51;
+  z-index: 100;
   min-width: 200px; min-height: 150px;
   background: var(--bg-board);
   border: 1px solid var(--border-accent);
@@ -1056,6 +1063,399 @@ body.show-desc .bm-desc { display: block; }
   opacity: 0.5;
 }
 
+/* ============================================
+   CALCULATOR WIDGET
+   ============================================ */
+.calc-display {
+  background: rgba(0,0,0,0.3);
+  border: 1px solid var(--border);
+  border-radius: var(--radius-sm);
+  padding: 10px 12px;
+  margin-bottom: 8px;
+  text-align: right;
+  min-height: 48px;
+}
+.calc-expression {
+  font-size: 12px;
+  color: var(--text-muted);
+  min-height: 16px;
+  word-break: break-all;
+}
+.calc-result {
+  font-size: 22px;
+  font-family: 'Rajdhani', monospace;
+  color: var(--text-primary);
+  font-weight: 600;
+  word-break: break-all;
+}
+.calc-buttons {
+  display: grid;
+  grid-template-columns: repeat(4, 1fr);
+  gap: 4px;
+  margin-bottom: 8px;
+}
+.calc-btn {
+  height: 36px;
+  background: rgba(255,255,255,0.04);
+  border: 1px solid var(--border);
+  border-radius: var(--radius-sm);
+  color: var(--text-primary);
+  font-size: 14px;
+  font-family: 'Rajdhani', sans-serif;
+  cursor: pointer;
+  transition: all 0.1s;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  padding: 0;
+}
+.calc-btn:hover {
+  background: rgba(255,255,255,0.08);
+  border-color: var(--border-accent);
+}
+.calc-btn:active {
+  transform: scale(0.95);
+}
+.calc-btn.operator {
+  color: var(--accent);
+  font-weight: 600;
+}
+.calc-btn.equals {
+  background: var(--accent-dim);
+  border-color: var(--accent);
+  color: var(--accent);
+  font-weight: 700;
+}
+.calc-btn.equals:hover {
+  background: var(--accent);
+  color: var(--bg-primary);
+}
+.calc-btn.clear {
+  color: var(--danger);
+}
+.calc-history {
+  border-top: 1px solid var(--border);
+  padding-top: 6px;
+  max-height: 100px;
+  overflow-y: auto;
+}
+.calc-history-title {
+  font-size: 9px;
+  color: var(--text-muted);
+  text-transform: uppercase;
+  letter-spacing: 1px;
+  margin-bottom: 4px;
+}
+.calc-history-item {
+  font-size: 11px;
+  color: var(--text-secondary);
+  padding: 3px 6px;
+  border-radius: var(--radius-sm);
+  cursor: pointer;
+  display: flex;
+  justify-content: space-between;
+}
+.calc-history-item:hover {
+  background: rgba(255,255,255,0.04);
+}
+.calc-history-item .calc-h-result {
+  color: var(--accent);
+  font-weight: 600;
+}
+
+/* ============================================
+   TIMER WIDGET
+   ============================================ */
+.timer-display {
+  text-align: center;
+  padding: 16px 0 8px;
+}
+.timer-time {
+  font-size: 36px;
+  font-family: 'Rajdhani', monospace;
+  font-weight: 700;
+  color: var(--text-primary);
+  letter-spacing: 2px;
+}
+.timer-time.finished {
+  color: var(--danger);
+  animation: timer-pulse 1s ease-in-out infinite;
+}
+@keyframes timer-pulse {
+  0%, 100% { opacity: 1; }
+  50% { opacity: 0.4; }
+}
+.timer-input-row {
+  display: flex;
+  justify-content: center;
+  margin-bottom: 12px;
+}
+.timer-input {
+  width: 120px;
+  text-align: center;
+  font-family: 'Rajdhani', monospace;
+  font-size: 16px;
+  background: rgba(0,0,0,0.3);
+  border: 1px solid var(--border);
+  border-radius: var(--radius-sm);
+  color: var(--text-primary);
+  padding: 6px 10px;
+}
+.timer-input::placeholder { color: var(--text-muted); }
+.timer-input:focus {
+  outline: none;
+  border-color: var(--accent);
+}
+.timer-controls {
+  display: flex;
+  gap: 6px;
+  margin-bottom: 12px;
+  padding: 0 8px;
+}
+.timer-ctrl-btn {
+  flex: 1;
+  height: 32px;
+  background: rgba(255,255,255,0.04);
+  border: 1px solid var(--border);
+  border-radius: var(--radius-sm);
+  color: var(--text-primary);
+  font-size: 12px;
+  font-family: 'Rajdhani', sans-serif;
+  cursor: pointer;
+  transition: all 0.1s;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  padding: 0;
+}
+.timer-ctrl-btn:hover {
+  background: rgba(255,255,255,0.08);
+  border-color: var(--border-accent);
+}
+.timer-ctrl-btn:active { transform: scale(0.95); }
+.timer-ctrl-btn:disabled {
+  opacity: 0.3;
+  cursor: default;
+  transform: none;
+}
+.timer-ctrl-btn.primary {
+  background: var(--accent-dim);
+  border-color: var(--accent);
+  color: var(--accent);
+  font-weight: 600;
+}
+.timer-ctrl-btn.primary:hover {
+  background: var(--accent);
+  color: var(--bg-primary);
+}
+.timer-ctrl-btn.danger {
+  color: var(--danger);
+}
+.timer-mute-btn {
+  width: 32px;
+  height: 32px;
+  flex: none;
+  font-size: 14px;
+  line-height: 1;
+  padding: 0;
+  background: var(--bg-board);
+  border: 1px solid var(--border);
+  border-radius: var(--radius-sm);
+  color: var(--text-secondary);
+  cursor: pointer;
+  transition: all 0.2s;
+}
+.timer-mute-btn:hover {
+  border-color: var(--accent);
+  color: var(--text-primary);
+}
+.timer-mute-btn.muted {
+  color: var(--text-muted);
+  opacity: 0.5;
+}
+.timer-presets {
+  border-top: 1px solid var(--border);
+  padding: 8px 8px 0;
+  max-height: 140px;
+  overflow-y: auto;
+}
+.timer-presets-header {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  margin-bottom: 6px;
+}
+.timer-presets-title {
+  font-size: 9px;
+  color: var(--text-muted);
+  text-transform: uppercase;
+  letter-spacing: 1px;
+}
+.timer-preset-add {
+  width: 22px; height: 22px;
+  background: none;
+  border: 1px solid var(--border);
+  border-radius: var(--radius-sm);
+  color: var(--text-muted);
+  cursor: pointer;
+  font-size: 14px;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  padding: 0;
+}
+.timer-preset-add:hover {
+  border-color: var(--accent);
+  color: var(--accent);
+}
+.timer-preset-item {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  padding: 4px 6px;
+  border-radius: var(--radius-sm);
+  cursor: pointer;
+  font-size: 12px;
+  color: var(--text-secondary);
+}
+.timer-preset-item:hover {
+  background: rgba(255,255,255,0.04);
+}
+.timer-preset-name {
+  flex: 1;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+.timer-preset-time {
+  color: var(--accent);
+  font-family: 'Rajdhani', monospace;
+  margin: 0 8px;
+}
+.timer-preset-del {
+  background: none;
+  border: none;
+  color: var(--text-muted);
+  cursor: pointer;
+  font-size: 11px;
+  padding: 2px 4px;
+}
+.timer-preset-del:hover { color: var(--danger); }
+.timer-add-row {
+  display: flex;
+  gap: 4px;
+  margin-top: 6px;
+}
+.timer-add-input {
+  flex: 1;
+  background: rgba(0,0,0,0.2);
+  border: 1px solid var(--border);
+  border-radius: var(--radius-sm);
+  color: var(--text-primary);
+  font-size: 11px;
+  padding: 4px 6px;
+}
+.timer-add-input::placeholder { color: var(--text-muted); }
+.timer-add-input:focus { outline: none; border-color: var(--accent); }
+.timer-add-confirm {
+  background: var(--accent-dim);
+  border: 1px solid var(--accent);
+  border-radius: var(--radius-sm);
+  color: var(--accent);
+  cursor: pointer;
+  font-size: 11px;
+  padding: 4px 8px;
+}
+.timer-add-confirm:hover {
+  background: var(--accent);
+  color: var(--bg-primary);
+}
+
+/* ============================================
+   IMAGE REFERENCE WIDGET
+   ============================================ */
+.imgref-container {
+  flex: 1;
+  display: flex;
+  flex-direction: column;
+  overflow: hidden;
+  padding: 8px;
+}
+.imgref-img-wrapper {
+  flex: 1;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  overflow: hidden;
+  border-radius: var(--radius-sm);
+  min-height: 80px;
+}
+.imgref-img {
+  max-width: 100%;
+  max-height: 100%;
+  object-fit: contain;
+  border-radius: var(--radius-sm);
+}
+.imgref-dropzone {
+  flex: 1;
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  justify-content: center;
+  border: 2px dashed var(--border);
+  border-radius: var(--radius-sm);
+  color: var(--text-muted);
+  font-size: 12px;
+  cursor: pointer;
+  transition: border-color 0.2s, color 0.2s;
+  min-height: 80px;
+  gap: 8px;
+}
+.imgref-dropzone:hover,
+.imgref-dropzone.dragover {
+  border-color: var(--accent);
+  color: var(--text-secondary);
+}
+.imgref-dropzone-icon {
+  font-size: 24px;
+  opacity: 0.5;
+}
+.imgref-label {
+  width: 100%;
+  margin-top: 8px;
+  font-size: 11px;
+  background: transparent;
+  border: 1px solid var(--border);
+  border-radius: var(--radius-sm);
+  color: var(--text-secondary);
+  padding: 4px 8px;
+  flex-shrink: 0;
+}
+.imgref-label:focus {
+  border-color: var(--accent);
+  outline: none;
+}
+.imgref-label::placeholder {
+  color: var(--text-muted);
+}
+.imgref-replace-btn {
+  width: 100%;
+  height: 24px;
+  margin-top: 6px;
+  font-size: 10px;
+  background: transparent;
+  border: 1px solid var(--border);
+  border-radius: var(--radius-sm);
+  color: var(--text-muted);
+  cursor: pointer;
+  flex-shrink: 0;
+  transition: all 0.2s;
+}
+.imgref-replace-btn:hover {
+  border-color: var(--accent);
+  color: var(--text-secondary);
+}
+
 /* ============================================
    WIDGET TOOLBAR
    ============================================ */
@@ -1064,7 +1464,7 @@ body.show-desc .bm-desc { display: block; }
   right: 16px;
   top: 50%;
   transform: translateY(-50%);
-  z-index: 90;
+  z-index: 100;
   display: flex;
   flex-direction: column;
   gap: 8px;
@@ -1492,6 +1892,7 @@ body.show-desc .bm-desc { display: block; }
   .search-bar { max-width: 400px; }
   .widget-toolbar-btn { width: 32px; height: 32px; }
   .notebook-panel { width: 320px; }
+  .calc-btn { height: 32px; font-size: 13px; }
 }
 
 /* Smartphone (max 480px) */
@@ -1528,6 +1929,7 @@ body.show-desc .bm-desc { display: block; }
   .toolbar-left .widget-toolbar { left: 50%; right: auto; transform: translateX(-50%); }
   .widget-toolbar-btn { width: 32px; height: 32px; }
   .notebook-panel { width: 100%; right: -100%; }
+  .calc-btn { height: 30px; font-size: 12px; }
   .toolbar-left .notebook-panel { left: -100%; }
 
   .modal { width: calc(100vw - 32px); }

src/js/app.js

@@ -18,6 +18,9 @@ async function init() {
   initSearch();
   await migrateSticky();
   await Notes.init();
+  await Calculator.init();
+  await Timer.init();
+  await ImageRef.init();
   initDataButtons();
   Store.checkQuota();
 
@@ -98,7 +101,9 @@ async function checkBackupReminder() {
     // JSON-Export auslösen (gleiche Logik wie btnExportJSON)
     const widgetData = await Store.get('widgetStates');
     const notesData = (widgetData && Array.isArray(widgetData.notes)) ? widgetData.notes : [];
-    const data = { version: '1.6.0', exported: new Date().toISOString(), boards, settings, notes: notesData };
+    const calcHistory = (widgetData && widgetData.calculator) ? widgetData.calculator.history || [] : [];
+    const timerPresets = (widgetData && widgetData.timer) ? widgetData.timer.presets || [] : [];
+    const data = { version: '1.9.0', exported: new Date().toISOString(), boards, settings, notes: notesData, calculator: calcHistory, timerPresets };
     const blob = new Blob([JSON.stringify(data, null, 2)], { type: 'application/json' });
     const url  = URL.createObjectURL(blob);
     const a    = document.createElement('a');

src/js/calculator.js

@@ -0,0 +1,729 @@
+/* =============================================
+   HELLION NEWTAB — calculator.js
+   Taschenrechner Widget: Expression-Parsing,
+   History, Tastatureingabe
+   ============================================= */
+
+const Calculator = {
+  WIDGET_ID: 'widget_calculator',
+  STORAGE_KEY: 'widgetStates',
+  MAX_HISTORY: 10,
+
+  /** @type {Array<{expr: string, result: string}>} */
+  _history: [],
+  _currentExpr: '',
+  _lastResult: '',
+  _isOpen: false,
+  _displayExprEl: null,
+  _displayResultEl: null,
+  _keydownHandler: null,
+
+  // ---- STORAGE ----
+
+  /**
+   * Calculator-State aus Storage laden
+   */
+  async load() {
+    const data = await Store.get(this.STORAGE_KEY);
+    if (data && data.calculator) {
+      this._history = Array.isArray(data.calculator.history) ? data.calculator.history : [];
+    }
+  },
+
+  /**
+   * Calculator-State in Storage speichern
+   * Bestehende Notes-Daten bleiben erhalten
+   */
+  async save() {
+    const data = await Store.get(this.STORAGE_KEY) || {};
+    const notesState = Array.isArray(data.notes) ? data.notes : [];
+
+    // Widget-Position aus WidgetManager holen
+    const widgetState = WidgetManager.getState(this.WIDGET_ID);
+    const calcData = {
+      x: widgetState ? widgetState.x : 400,
+      y: widgetState ? widgetState.y : 120,
+      width: widgetState ? widgetState.width : 280,
+      height: widgetState ? widgetState.height : 400,
+      open: this._isOpen,
+      history: this._history.slice(0, this.MAX_HISTORY)
+    };
+
+    await Store.set(this.STORAGE_KEY, { notes: notesState, calculator: calcData });
+  },
+
+  // ---- WIDGET LIFECYCLE ----
+
+  /**
+   * Calculator oeffnen oder in Vordergrund bringen
+   */
+  async open() {
+    if (this._isOpen) {
+      WidgetManager.bringToFront(this.WIDGET_ID);
+      return;
+    }
+
+    // Gespeicherte Position laden
+    const data = await Store.get(this.STORAGE_KEY);
+    const saved = (data && data.calculator) ? data.calculator : {};
+
+    const widgetId = WidgetManager.create('calculator', {
+      id: this.WIDGET_ID,
+      title: 'Taschenrechner',
+      x: saved.x || 400,
+      y: saved.y || 120,
+      width: saved.width || 280,
+      height: saved.height || 400,
+      open: true
+    });
+
+    const body = WidgetManager.getBody(widgetId);
+    if (body) this.renderBody(body);
+
+    this._isOpen = true;
+
+    // Keyboard-Events binden
+    const entry = WidgetManager._widgets.get(this.WIDGET_ID);
+    if (entry) this._bindKeyboard(entry.el);
+
+    await this.save();
+  },
+
+  /**
+   * Calculator toggle: oeffnen oder minimieren
+   */
+  async toggle() {
+    if (this._isOpen) {
+      const entry = WidgetManager._widgets.get(this.WIDGET_ID);
+      if (entry && entry.state.open) {
+        await WidgetManager.minimize(this.WIDGET_ID);
+        this._isOpen = false;
+        await this.save();
+      } else if (entry) {
+        await WidgetManager.openWidget(this.WIDGET_ID);
+        this._isOpen = true;
+        await this.save();
+      }
+    } else {
+      await this.open();
+    }
+  },
+
+  /**
+   * Wird aufgerufen wenn Widget geschlossen wird
+   */
+  async onClose() {
+    this._isOpen = false;
+    this._unbindKeyboard();
+    this._displayExprEl = null;
+    this._displayResultEl = null;
+    await this.save();
+  },
+
+  // ---- UI RENDERING ----
+
+  /**
+   * Calculator-Body rendern (in Widget-Body einfuegen)
+   * @param {HTMLElement} bodyEl
+   */
+  renderBody(bodyEl) {
+    bodyEl.textContent = '';
+    bodyEl.style.padding = '8px';
+    bodyEl.style.display = 'flex';
+    bodyEl.style.flexDirection = 'column';
+
+    // Display
+    const display = document.createElement('div');
+    display.className = 'calc-display';
+
+    const exprEl = document.createElement('div');
+    exprEl.className = 'calc-expression';
+    this._displayExprEl = exprEl;
+
+    const resultEl = document.createElement('div');
+    resultEl.className = 'calc-result';
+    resultEl.textContent = '0';
+    this._displayResultEl = resultEl;
+
+    display.append(exprEl, resultEl);
+
+    // Buttons
+    const buttonsEl = this._createButtons();
+
+    // History
+    const historyEl = this._createHistoryPanel();
+
+    bodyEl.append(display, buttonsEl, historyEl);
+
+    // Aktuellen State anzeigen
+    this._updateDisplay();
+  },
+
+  /**
+   * Button-Grid erstellen (4x5)
+   * @returns {HTMLElement}
+   */
+  _createButtons() {
+    const grid = document.createElement('div');
+    grid.className = 'calc-buttons';
+
+    // Button-Layout: [label, value, cssClass]
+    const buttons = [
+      ['C',  'clear',     'clear'],
+      ['()', 'paren',     'operator'],
+      ['%',  '%',         'operator'],
+      ['\u00F7', '/',     'operator'],
+      ['7',  '7',         ''],
+      ['8',  '8',         ''],
+      ['9',  '9',         ''],
+      ['\u00D7', '*',     'operator'],
+      ['4',  '4',         ''],
+      ['5',  '5',         ''],
+      ['6',  '6',         ''],
+      ['\u2212', '-',     'operator'],
+      ['1',  '1',         ''],
+      ['2',  '2',         ''],
+      ['3',  '3',         ''],
+      ['+',  '+',         'operator'],
+      ['0',  '0',         ''],
+      ['.',  '.',         ''],
+      ['\u232B', 'backspace', ''],
+      ['=',  '=',         'equals']
+    ];
+
+    buttons.forEach(([label, value, cls]) => {
+      const btn = document.createElement('button');
+      btn.className = 'calc-btn' + (cls ? ' ' + cls : '');
+      btn.textContent = label;
+      btn.type = 'button';
+      btn.addEventListener('click', () => this._handleKey(value));
+      grid.appendChild(btn);
+    });
+
+    return grid;
+  },
+
+  /**
+   * History-Panel erstellen
+   * @returns {HTMLElement}
+   */
+  _createHistoryPanel() {
+    const container = document.createElement('div');
+    container.className = 'calc-history';
+    container.id = 'calcHistoryPanel';
+
+    const title = document.createElement('div');
+    title.className = 'calc-history-title';
+    title.textContent = 'History';
+    container.appendChild(title);
+
+    this._renderHistoryItems(container);
+
+    return container;
+  },
+
+  /**
+   * History-Items rendern
+   * @param {HTMLElement} container
+   */
+  _renderHistoryItems(container) {
+    // Alte Items entfernen (nur die .calc-history-item Elemente)
+    const oldItems = container.querySelectorAll('.calc-history-item');
+    oldItems.forEach(item => item.remove());
+
+    if (this._history.length === 0) return;
+
+    // Neueste zuerst
+    const reversed = [...this._history].reverse();
+    reversed.forEach(entry => {
+      const item = document.createElement('div');
+      item.className = 'calc-history-item';
+
+      const exprSpan = document.createElement('span');
+      exprSpan.textContent = entry.expr;
+
+      const resultSpan = document.createElement('span');
+      resultSpan.className = 'calc-h-result';
+      resultSpan.textContent = '= ' + entry.result;
+
+      item.append(exprSpan, resultSpan);
+
+      // Klick uebernimmt Ergebnis als neue Eingabe
+      item.addEventListener('click', () => {
+        this._currentExpr = entry.result;
+        this._lastResult = '';
+        this._updateDisplay();
+      });
+
+      container.appendChild(item);
+    });
+  },
+
+  // ---- INPUT HANDLING ----
+
+  /**
+   * Taste verarbeiten
+   * @param {string} key
+   */
+  _handleKey(key) {
+    switch (key) {
+      case 'clear':
+        this._currentExpr = '';
+        this._lastResult = '';
+        break;
+
+      case 'backspace':
+        this._currentExpr = this._currentExpr.slice(0, -1);
+        break;
+
+      case '=':
+        this._calculate();
+        return;
+
+      case 'paren': {
+        // Smarte Klammern: oeffnende wenn noetig, sonst schliessende
+        const openCount = (this._currentExpr.match(/\(/g) || []).length;
+        const closeCount = (this._currentExpr.match(/\)/g) || []).length;
+        const lastChar = this._currentExpr.slice(-1);
+        if (openCount <= closeCount || /[+\-*/%(]$/.test(lastChar) || this._currentExpr === '') {
+          this._currentExpr += '(';
+        } else {
+          this._currentExpr += ')';
+        }
+        break;
+      }
+
+      case '%':
+      case '+':
+      case '-':
+      case '*':
+      case '/': {
+        // Wenn gerade ein Ergebnis angezeigt wird, damit weiterrechnen
+        if (this._lastResult && this._currentExpr === '') {
+          this._currentExpr = this._lastResult;
+          this._lastResult = '';
+        }
+        // Doppelte Operatoren verhindern (letzten ersetzen)
+        const last = this._currentExpr.slice(-1);
+        if (/[+\-*/%]/.test(last)) {
+          this._currentExpr = this._currentExpr.slice(0, -1) + key;
+        } else {
+          this._currentExpr += key;
+        }
+        break;
+      }
+
+      case '.': {
+        // Doppelten Dezimalpunkt im letzten Zahlenblock verhindern
+        const parts = this._currentExpr.split(/[+\-*/%()]/);
+        const lastPart = parts[parts.length - 1];
+        if (lastPart && lastPart.includes('.')) break;
+        this._currentExpr += key;
+        break;
+      }
+
+      default:
+        // Ziffern 0-9
+        if (/^[0-9]$/.test(key)) {
+          // Wenn ein Ergebnis da ist und User eine Zahl tippt, neue Berechnung starten
+          if (this._lastResult && this._currentExpr === '') {
+            this._lastResult = '';
+          }
+          this._currentExpr += key;
+        }
+        break;
+    }
+
+    this._updateDisplay();
+  },
+
+  /**
+   * Berechnung ausfuehren
+   */
+  async _calculate() {
+    if (!this._currentExpr) return;
+
+    const result = this._evaluate(this._currentExpr);
+    if (result === null) {
+      this._lastResult = 'Fehler';
+      this._updateDisplay();
+      return;
+    }
+
+    const resultStr = this._formatResult(result);
+    this._addHistory(this._currentExpr, resultStr);
+    this._lastResult = resultStr;
+
+    // Display aktualisieren
+    if (this._displayExprEl) {
+      this._displayExprEl.textContent = this._formatExpression(this._currentExpr) + ' =';
+    }
+    if (this._displayResultEl) {
+      this._displayResultEl.textContent = resultStr;
+    }
+
+    this._currentExpr = '';
+
+    // History-Panel aktualisieren
+    const historyPanel = document.getElementById('calcHistoryPanel');
+    if (historyPanel) this._renderHistoryItems(historyPanel);
+
+    await this.save();
+  },
+
+  // ---- EXPRESSION PARSER (Shunting-Yard, KEIN eval!) ----
+
+  /**
+   * Expression sicher auswerten
+   * @param {string} expr
+   * @returns {number|null}
+   */
+  _evaluate(expr) {
+    try {
+      // Nur erlaubte Zeichen
+      const sanitized = expr.replace(/[^0-9+\-*/.%()]/g, '');
+      if (!sanitized) return null;
+
+      const tokens = this._tokenize(sanitized);
+      if (!tokens) return null;
+
+      return this._parseExpression(tokens);
+    } catch {
+      return null;
+    }
+  },
+
+  /**
+   * Expression in Tokens aufteilen
+   * @param {string} expr
+   * @returns {Array|null}
+   */
+  _tokenize(expr) {
+    const tokens = [];
+    let i = 0;
+
+    while (i < expr.length) {
+      const ch = expr[i];
+
+      // Zahl (inkl. Dezimal)
+      if (/[0-9.]/.test(ch)) {
+        let num = '';
+        while (i < expr.length && /[0-9.]/.test(expr[i])) {
+          num += expr[i];
+          i++;
+        }
+        const parsed = parseFloat(num);
+        if (isNaN(parsed)) return null;
+        tokens.push({ type: 'number', value: parsed });
+        continue;
+      }
+
+      // Operator
+      if (/[+\-*/%]/.test(ch)) {
+        // Negativer Vorzeichen-Check: am Anfang oder nach Operator/oeffnender Klammer
+        if (ch === '-') {
+          const prev = tokens[tokens.length - 1];
+          if (!prev || prev.type === 'op' || (prev.type === 'paren' && prev.value === '(')) {
+            // Negatives Vorzeichen → als Teil der naechsten Zahl lesen
+            let num = '-';
+            i++;
+            while (i < expr.length && /[0-9.]/.test(expr[i])) {
+              num += expr[i];
+              i++;
+            }
+            if (num === '-') return null;
+            const parsed = parseFloat(num);
+            if (isNaN(parsed)) return null;
+            tokens.push({ type: 'number', value: parsed });
+            continue;
+          }
+        }
+        tokens.push({ type: 'op', value: ch });
+        i++;
+        continue;
+      }
+
+      // Klammern
+      if (ch === '(' || ch === ')') {
+        tokens.push({ type: 'paren', value: ch });
+        i++;
+        continue;
+      }
+
+      // Unbekanntes Zeichen
+      return null;
+    }
+
+    return tokens;
+  },
+
+  /**
+   * Rekursiver Descent Parser mit Operator-Precedence
+   * @param {Array} tokens
+   * @returns {number|null}
+   */
+  _parseExpression(tokens) {
+    let pos = 0;
+
+    function peek() { return tokens[pos]; }
+    function consume() { return tokens[pos++]; }
+
+    // Expression: Term (('+' | '-') Term)*
+    function parseExpr() {
+      let left = parseTerm();
+      if (left === null) return null;
+
+      while (pos < tokens.length) {
+        const t = peek();
+        if (!t || t.type !== 'op' || (t.value !== '+' && t.value !== '-')) break;
+        consume();
+        const right = parseTerm();
+        if (right === null) return null;
+        left = t.value === '+' ? left + right : left - right;
+      }
+      return left;
+    }
+
+    // Term: Factor (('*' | '/' | '%') Factor)*
+    function parseTerm() {
+      let left = parseFactor();
+      if (left === null) return null;
+
+      while (pos < tokens.length) {
+        const t = peek();
+        if (!t || t.type !== 'op' || (t.value !== '*' && t.value !== '/' && t.value !== '%')) break;
+        consume();
+        const right = parseFactor();
+        if (right === null) return null;
+        if (t.value === '*') {
+          left = left * right;
+        } else if (t.value === '/') {
+          if (right === 0) return null;
+          left = left / right;
+        } else {
+          left = left % right;
+        }
+      }
+      return left;
+    }
+
+    // Factor: Number | '(' Expression ')'
+    function parseFactor() {
+      const t = peek();
+      if (!t) return null;
+
+      if (t.type === 'number') {
+        consume();
+        return t.value;
+      }
+
+      if (t.type === 'paren' && t.value === '(') {
+        consume();
+        const val = parseExpr();
+        if (val === null) return null;
+        const closing = peek();
+        if (closing && closing.type === 'paren' && closing.value === ')') {
+          consume();
+        }
+        return val;
+      }
+
+      return null;
+    }
+
+    const result = parseExpr();
+
+    // Alle Tokens muessen verbraucht sein
+    if (pos < tokens.length) return null;
+
+    if (result === null || !isFinite(result)) return null;
+    return result;
+  },
+
+  // ---- FORMATTING ----
+
+  /**
+   * Ergebnis formatieren (maximal 10 Dezimalstellen, trailing Nullen entfernen)
+   * @param {number} num
+   * @returns {string}
+   */
+  _formatResult(num) {
+    if (Number.isInteger(num)) return num.toString();
+    // Maximal 10 Dezimalstellen, trailing Nullen weg
+    const str = num.toFixed(10).replace(/\.?0+$/, '');
+    return str;
+  },
+
+  /**
+   * Expression fuer Anzeige formatieren (× statt *, ÷ statt /)
+   * @param {string} expr
+   * @returns {string}
+   */
+  _formatExpression(expr) {
+    return expr
+      .replace(/\*/g, '\u00D7')
+      .replace(/\//g, '\u00F7');
+  },
+
+  // ---- DISPLAY ----
+
+  /**
+   * Display aktualisieren
+   */
+  _updateDisplay() {
+    if (this._displayExprEl) {
+      if (this._lastResult) {
+        // Ergebnis-Modus: Expression oben, Ergebnis gross
+        // (wird von _calculate() direkt gesetzt)
+      } else {
+        this._displayExprEl.textContent = '';
+      }
+    }
+    if (this._displayResultEl) {
+      if (this._lastResult && this._currentExpr === '') {
+        this._displayResultEl.textContent = this._lastResult;
+      } else {
+        this._displayResultEl.textContent = this._formatExpression(this._currentExpr) || '0';
+      }
+    }
+  },
+
+  // ---- HISTORY ----
+
+  /**
+   * History-Eintrag hinzufuegen
+   * @param {string} expr
+   * @param {string} result
+   */
+  _addHistory(expr, result) {
+    this._history.push({
+      expr: this._formatExpression(expr),
+      result: result
+    });
+    // Limit einhalten
+    if (this._history.length > this.MAX_HISTORY) {
+      this._history = this._history.slice(-this.MAX_HISTORY);
+    }
+  },
+
+  // ---- KEYBOARD ----
+
+  /**
+   * Tastatur-Events binden
+   * @param {HTMLElement} widgetEl
+   */
+  _bindKeyboard(widgetEl) {
+    this._unbindKeyboard();
+
+    this._keydownHandler = (e) => {
+      // Nur reagieren wenn Calculator-Widget fokussiert ist
+      // (d.h. nicht wenn User in Textarea/Input tippt)
+      if (e.target.tagName === 'TEXTAREA' || e.target.tagName === 'INPUT') return;
+      if (e.target.contentEditable === 'true') return;
+
+      const key = e.key;
+      let handled = false;
+
+      if (/^[0-9]$/.test(key)) {
+        this._handleKey(key);
+        handled = true;
+      } else if (key === '+' || key === '-' || key === '*' || key === '/') {
+        this._handleKey(key);
+        handled = true;
+      } else if (key === '.') {
+        this._handleKey('.');
+        handled = true;
+      } else if (key === '%') {
+        this._handleKey('%');
+        handled = true;
+      } else if (key === '(' || key === ')') {
+        this._handleKey('paren');
+        handled = true;
+      } else if (key === 'Enter' || key === '=') {
+        this._handleKey('=');
+        handled = true;
+      } else if (key === 'Backspace') {
+        this._handleKey('backspace');
+        handled = true;
+      } else if (key === 'Escape' || key === 'c' || key === 'C') {
+        this._handleKey('clear');
+        handled = true;
+      }
+
+      if (handled) {
+        e.preventDefault();
+        e.stopPropagation();
+      }
+    };
+
+    widgetEl.addEventListener('keydown', this._keydownHandler);
+    // Widget fokussierbar machen
+    widgetEl.tabIndex = 0;
+    widgetEl.focus();
+  },
+
+  /**
+   * Keyboard-Events entfernen
+   */
+  _unbindKeyboard() {
+    if (this._keydownHandler) {
+      const entry = WidgetManager._widgets.get(this.WIDGET_ID);
+      if (entry) {
+        entry.el.removeEventListener('keydown', this._keydownHandler);
+      }
+      this._keydownHandler = null;
+    }
+  },
+
+  // ---- INIT ----
+
+  /**
+   * Calculator initialisieren (aus app.js aufgerufen)
+   */
+  async init() {
+    await this.load();
+
+    // Wenn Calculator beim letzten Mal offen war, wiederherstellen
+    const data = await Store.get(this.STORAGE_KEY);
+    if (data && data.calculator && data.calculator.open) {
+      await this.open();
+    }
+
+    // Close-Event abfangen: WidgetManager.close() ueberschreiben
+    const origClose = WidgetManager.close.bind(WidgetManager);
+    const self = this;
+    WidgetManager.close = function(id) {
+      origClose(id);
+      if (id === self.WIDGET_ID) {
+        self.onClose();
+      }
+    };
+
+    // Minimize-Event abfangen
+    const origMinimize = WidgetManager.minimize.bind(WidgetManager);
+    WidgetManager.minimize = async function(id) {
+      await origMinimize(id);
+      if (id === self.WIDGET_ID) {
+        self._isOpen = false;
+        await self.save();
+      }
+    };
+
+    // Open-Event abfangen
+    const origOpen = WidgetManager.openWidget.bind(WidgetManager);
+    WidgetManager.openWidget = async function(id) {
+      await origOpen(id);
+      if (id === self.WIDGET_ID) {
+        self._isOpen = true;
+        // Body neu rendern (war durch minimize entfernt)
+        const body = WidgetManager.getBody(self.WIDGET_ID);
+        if (body && body.children.length === 0) {
+          self.renderBody(body);
+        }
+        const entry = WidgetManager._widgets.get(self.WIDGET_ID);
+        if (entry) self._bindKeyboard(entry.el);
+        await self.save();
+      }
+    };
+  }
+};

src/js/data.js

@@ -13,11 +13,13 @@ function initDataButtons() {
   btnExport.addEventListener('click', async () => {
     const widgetData = await Store.get('widgetStates');
     const data = {
-      version: '1.6.0',
+      version: '1.9.0',
       exported: new Date().toISOString(),
       boards,
       settings,
-      notes: widgetData && Array.isArray(widgetData.notes) ? widgetData.notes : []
+      notes: widgetData && Array.isArray(widgetData.notes) ? widgetData.notes : [],
+      calculator: widgetData && widgetData.calculator ? widgetData.calculator.history || [] : [],
+      timerPresets: widgetData && widgetData.timer ? widgetData.timer.presets || [] : []
     };
     const blob = new Blob([JSON.stringify(data, null, 2)], { type: 'application/json' });
     const url  = URL.createObjectURL(blob);
@@ -60,9 +62,9 @@ function initDataButtons() {
 
       // Notes importieren (falls vorhanden)
       let notesImported = 0;
+      const existingWidgets = await Store.get('widgetStates') || {};
       if (Array.isArray(data.notes) && data.notes.length > 0) {
-        const existingWidgets = await Store.get('widgetStates');
-        const existingNotes = (existingWidgets && Array.isArray(existingWidgets.notes)) ? existingWidgets.notes : [];
+        const existingNotes = Array.isArray(existingWidgets.notes) ? existingWidgets.notes : [];
         const importNotes = data.notes.filter(n => {
           if (!n || !n.id || !n.template) return false;
           n.checklistItems = Array.isArray(n.checklistItems) ? n.checklistItems : [];
@@ -73,15 +75,48 @@ function initDataButtons() {
         const toImport = importNotes.slice(0, spaceLeft);
         if (toImport.length > 0) {
           const merged = [...existingNotes, ...toImport];
-          await Store.set('widgetStates', { notes: merged });
+          existingWidgets.notes = merged;
           Notes._notes = merged;
           notesImported = toImport.length;
         }
       }
 
+      // Calculator-History importieren (falls vorhanden)
+      let calcImported = false;
+      if (Array.isArray(data.calculator) && data.calculator.length > 0) {
+        const calcHistory = data.calculator.filter(h => h && typeof h.expr === 'string' && typeof h.result === 'string');
+        if (calcHistory.length > 0) {
+          if (!existingWidgets.calculator) {
+            existingWidgets.calculator = { x: 400, y: 120, width: 280, height: 400, open: false, history: [] };
+          }
+          existingWidgets.calculator.history = calcHistory.slice(0, Calculator.MAX_HISTORY);
+          Calculator._history = existingWidgets.calculator.history;
+          calcImported = true;
+        }
+      }
+
+      // Timer-Presets importieren (falls vorhanden)
+      let timerImported = false;
+      if (Array.isArray(data.timerPresets) && data.timerPresets.length > 0) {
+        const validPresets = data.timerPresets.filter(p => p && typeof p.name === 'string' && typeof p.seconds === 'number');
+        if (validPresets.length > 0) {
+          if (!existingWidgets.timer) {
+            existingWidgets.timer = { x: 600, y: 80, width: 260, height: 360, open: false, presets: [] };
+          }
+          existingWidgets.timer.presets = validPresets.slice(0, Timer.MAX_PRESETS);
+          Timer._presets = existingWidgets.timer.presets;
+          timerImported = true;
+        }
+      }
+
+      // Gemeinsam speichern
+      await Store.set('widgetStates', existingWidgets);
+
       const noteMsg = notesImported > 0 ? ` + ${notesImported} Note(s)` : '';
+      const calcMsg = calcImported ? ' + Calculator-History' : '';
+      const timerMsg = timerImported ? ' + Timer-Presets' : '';
       await HellionDialog.alert(
-        `${validBoards.length} Board(s)${noteMsg} erfolgreich importiert.`,
+        `${validBoards.length} Board(s)${noteMsg}${calcMsg}${timerMsg} erfolgreich importiert.`,
         { type: 'success', title: 'Import erfolgreich' }
       );
     } catch (err) {

src/js/image-ref.js

@@ -0,0 +1,500 @@
+/* =============================================
+   HELLION NEWTAB — image-ref.js
+   Bild-Referenz Widget: Session-only Bildanzeige
+   mit Canvas API WebP-Konvertierung
+   ============================================= */
+
+const ImageRef = {
+  MAX_IMAGES: 3,
+  STORAGE_KEY: 'widgetStates',
+  SESSION_KEY: 'imageRefData',
+
+  /** @type {Array<{id: string, label: string, x: number, y: number, width: number, height: number, open: boolean}>} */
+  _images: [],
+  _saveTimer: null,
+
+  // ---- STORAGE (persistent: Position/Meta) ----
+
+  /**
+   * Widget-Meta aus persistentem Storage laden
+   */
+  async load() {
+    const data = await Store.get(this.STORAGE_KEY);
+    if (data && data.imageRef && Array.isArray(data.imageRef.images)) {
+      this._images = data.imageRef.images;
+    }
+  },
+
+  /**
+   * Widget-Meta persistent speichern
+   * Bestehende Notes, Calculator, Timer bleiben erhalten
+   */
+  async save() {
+    const data = await Store.get(this.STORAGE_KEY) || {};
+    if (data.notes === undefined) data.notes = [];
+
+    // Positionen aus WidgetManager aktualisieren
+    const updated = this._images.map(img => {
+      const ws = WidgetManager.getState(img.id);
+      if (ws) {
+        img.x = ws.x;
+        img.y = ws.y;
+        img.width = ws.width;
+        img.height = ws.height;
+        img.open = ws.open;
+      }
+      return img;
+    });
+
+    data.imageRef = { images: updated };
+    await Store.set(this.STORAGE_KEY, data);
+  },
+
+  /**
+   * Debounced Save
+   */
+  _debouncedSave() {
+    clearTimeout(this._saveTimer);
+    this._saveTimer = setTimeout(() => this.save(), 500);
+  },
+
+  // ---- SESSION STORAGE (Bilddaten) ----
+
+  /**
+   * Bilddaten in sessionStorage speichern
+   */
+  _saveSession() {
+    try {
+      const sessionData = {};
+      this._images.forEach(img => {
+        const dataUrl = this._getSessionImage(img.id);
+        if (dataUrl) sessionData[img.id] = dataUrl;
+      });
+      sessionStorage.setItem(this.SESSION_KEY, JSON.stringify(sessionData));
+    } catch (e) {
+      console.warn('ImageRef: sessionStorage Write fehlgeschlagen', e);
+    }
+  },
+
+  /**
+   * Bilddaten aus sessionStorage laden
+   * @returns {Object} - { id: dataUrl, ... }
+   */
+  _loadSessionAll() {
+    try {
+      const raw = sessionStorage.getItem(this.SESSION_KEY);
+      if (!raw) return {};
+      return JSON.parse(raw);
+    } catch (e) {
+      console.warn('ImageRef: sessionStorage Read fehlgeschlagen', e);
+      return {};
+    }
+  },
+
+  /**
+   * Einzelnes Bild aus sessionStorage lesen
+   * @param {string} id
+   * @returns {string|null}
+   */
+  _getSessionImage(id) {
+    const all = this._loadSessionAll();
+    return all[id] || null;
+  },
+
+  /**
+   * Einzelnes Bild in sessionStorage setzen
+   * @param {string} id
+   * @param {string} dataUrl
+   */
+  _setSessionImage(id, dataUrl) {
+    try {
+      const all = this._loadSessionAll();
+      all[id] = dataUrl;
+      sessionStorage.setItem(this.SESSION_KEY, JSON.stringify(all));
+    } catch (e) {
+      console.warn('ImageRef: sessionStorage Write fehlgeschlagen', e);
+      HellionDialog.alert(
+        'Bild konnte nicht gespeichert werden. Der Browser-Speicher ist voll.',
+        { type: 'danger', title: 'Speicherfehler' }
+      );
+    }
+  },
+
+  /**
+   * Einzelnes Bild aus sessionStorage entfernen
+   * @param {string} id
+   */
+  _removeSessionImage(id) {
+    try {
+      const all = this._loadSessionAll();
+      delete all[id];
+      sessionStorage.setItem(this.SESSION_KEY, JSON.stringify(all));
+    } catch (e) {
+      console.warn('ImageRef: sessionStorage Remove fehlgeschlagen', e);
+    }
+  },
+
+  // ---- WIDGET LIFECYCLE ----
+
+  /**
+   * Neues Bild-Widget erstellen (oeffnet File-Dialog)
+   */
+  async create() {
+    if (!settings.imageRefEnabled) return;
+
+    if (this._images.length >= this.MAX_IMAGES) {
+      await HellionDialog.alert(
+        'Maximal ' + this.MAX_IMAGES + ' Bild-Widgets gleichzeitig. Schliesse eines um ein neues zu oeffnen.',
+        { type: 'warning', title: 'Limit erreicht' }
+      );
+      return;
+    }
+
+    // Freie ID finden
+    const usedIds = new Set(this._images.map(i => i.id));
+    let slotId = null;
+    for (let i = 0; i < this.MAX_IMAGES; i++) {
+      const candidate = 'image_' + i;
+      if (!usedIds.has(candidate)) {
+        slotId = candidate;
+        break;
+      }
+    }
+    if (!slotId) return;
+
+    // File-Dialog
+    const file = await this._pickFile();
+    if (!file) return;
+
+    // Bild verarbeiten
+    let dataUrl;
+    try {
+      dataUrl = await this._processFile(file);
+    } catch (err) {
+      await HellionDialog.alert(
+        'Bild konnte nicht geladen werden: ' + err.message,
+        { type: 'danger', title: 'Bildfehler' }
+      );
+      return;
+    }
+
+    // In sessionStorage speichern
+    this._setSessionImage(slotId, dataUrl);
+
+    // Meta erstellen
+    const imageData = {
+      id: slotId,
+      label: '',
+      x: 200 + (this._images.length * 40),
+      y: 120 + (this._images.length * 30),
+      width: 320,
+      height: 280,
+      open: true
+    };
+    this._images.push(imageData);
+
+    // Widget erstellen
+    this._createWidget(imageData, dataUrl);
+    await this.save();
+  },
+
+  /**
+   * Widget im DOM erstellen
+   * @param {Object} imageData
+   * @param {string|null} dataUrl
+   */
+  _createWidget(imageData, dataUrl) {
+    WidgetManager.create('image', {
+      id: imageData.id,
+      title: imageData.label || 'Bild-Referenz',
+      x: imageData.x,
+      y: imageData.y,
+      width: imageData.width,
+      height: imageData.height,
+      open: imageData.open !== false
+    });
+
+    const body = WidgetManager.getBody(imageData.id);
+    if (body) this.renderBody(imageData, body, dataUrl);
+  },
+
+  /**
+   * Widget geschlossen — Daten aufraeumen
+   * @param {string} id
+   */
+  async onClose(id) {
+    this._removeSessionImage(id);
+    this._images = this._images.filter(img => img.id !== id);
+    await this.save();
+  },
+
+  // ---- UI RENDERING ----
+
+  /**
+   * Widget-Body rendern
+   * @param {Object} imageData
+   * @param {HTMLElement} bodyEl
+   * @param {string|null} dataUrl
+   */
+  renderBody(imageData, bodyEl, dataUrl) {
+    bodyEl.textContent = '';
+    const container = document.createElement('div');
+    container.className = 'imgref-container';
+
+    if (dataUrl) {
+      // Bild anzeigen
+      const wrapper = document.createElement('div');
+      wrapper.className = 'imgref-img-wrapper';
+
+      const img = document.createElement('img');
+      img.className = 'imgref-img';
+      img.src = dataUrl;
+      img.alt = imageData.label || 'Bild-Referenz';
+      wrapper.appendChild(img);
+
+      // Bild ersetzen Button
+      const replaceBtn = document.createElement('button');
+      replaceBtn.className = 'imgref-replace-btn';
+      replaceBtn.type = 'button';
+      replaceBtn.textContent = 'Bild ersetzen';
+      replaceBtn.addEventListener('click', async () => {
+        const file = await this._pickFile();
+        if (!file) return;
+        try {
+          const newDataUrl = await this._processFile(file);
+          this._setSessionImage(imageData.id, newDataUrl);
+          this.renderBody(imageData, bodyEl, newDataUrl);
+        } catch (err) {
+          await HellionDialog.alert(
+            'Bild konnte nicht geladen werden: ' + err.message,
+            { type: 'danger', title: 'Bildfehler' }
+          );
+        }
+      });
+
+      container.append(wrapper, replaceBtn);
+    } else {
+      // Drop-Zone (kein Bild vorhanden)
+      const dropzone = this._createDropzone(imageData, bodyEl);
+      container.appendChild(dropzone);
+    }
+
+    // Label-Input
+    const label = document.createElement('input');
+    label.className = 'imgref-label';
+    label.type = 'text';
+    label.placeholder = 'Beschriftung (optional)';
+    label.maxLength = 100;
+    label.value = imageData.label || '';
+
+    label.addEventListener('input', () => {
+      const text = label.value.trim().slice(0, 100);
+      imageData.label = text;
+
+      // Widget-Titel aktualisieren
+      const entry = WidgetManager._widgets.get(imageData.id);
+      if (entry) {
+        const titleEl = entry.el.querySelector('.widget-title-text');
+        if (titleEl) titleEl.textContent = text || 'Bild-Referenz';
+        entry.state.title = text || 'Bild-Referenz';
+      }
+
+      this._debouncedSave();
+    });
+
+    container.appendChild(label);
+    bodyEl.appendChild(container);
+  },
+
+  /**
+   * Drop-Zone erstellen (fuer leere Widgets / neue Bilder)
+   * @param {Object} imageData
+   * @param {HTMLElement} bodyEl
+   * @returns {HTMLElement}
+   */
+  _createDropzone(imageData, bodyEl) {
+    const dropzone = document.createElement('div');
+    dropzone.className = 'imgref-dropzone';
+
+    const icon = document.createElement('div');
+    icon.className = 'imgref-dropzone-icon';
+    icon.textContent = '\uD83D\uDDBC\uFE0F';
+
+    const text = document.createElement('span');
+    text.textContent = 'Klicken oder Bild hierher ziehen';
+
+    dropzone.append(icon, text);
+
+    // Klick -> File-Dialog
+    dropzone.addEventListener('click', async () => {
+      const file = await this._pickFile();
+      if (!file) return;
+      try {
+        const dataUrl = await this._processFile(file);
+        this._setSessionImage(imageData.id, dataUrl);
+        this.renderBody(imageData, bodyEl, dataUrl);
+        await this.save();
+      } catch (err) {
+        await HellionDialog.alert(
+          'Bild konnte nicht geladen werden: ' + err.message,
+          { type: 'danger', title: 'Bildfehler' }
+        );
+      }
+    });
+
+    // Drag & Drop
+    dropzone.addEventListener('dragover', (e) => {
+      e.preventDefault();
+      e.stopPropagation();
+      dropzone.classList.add('dragover');
+    });
+
+    dropzone.addEventListener('dragleave', (e) => {
+      e.preventDefault();
+      e.stopPropagation();
+      dropzone.classList.remove('dragover');
+    });
+
+    dropzone.addEventListener('drop', async (e) => {
+      e.preventDefault();
+      e.stopPropagation();
+      dropzone.classList.remove('dragover');
+
+      const file = e.dataTransfer.files[0];
+      if (!file || !file.type.startsWith('image/')) {
+        await HellionDialog.alert(
+          'Bitte eine Bilddatei verwenden (PNG, JPG, WebP, etc.).',
+          { type: 'warning', title: 'Kein Bild' }
+        );
+        return;
+      }
+
+      try {
+        const dataUrl = await this._processFile(file);
+        this._setSessionImage(imageData.id, dataUrl);
+        this.renderBody(imageData, bodyEl, dataUrl);
+        await this.save();
+      } catch (err) {
+        await HellionDialog.alert(
+          'Bild konnte nicht geladen werden: ' + err.message,
+          { type: 'danger', title: 'Bildfehler' }
+        );
+      }
+    });
+
+    return dropzone;
+  },
+
+  // ---- FILE HANDLING ----
+
+  /**
+   * File-Dialog oeffnen
+   * @returns {Promise<File|null>}
+   */
+  _pickFile() {
+    return new Promise(resolve => {
+      const input = document.createElement('input');
+      input.type = 'file';
+      input.accept = 'image/*';
+      input.addEventListener('change', () => {
+        resolve(input.files[0] || null);
+      });
+      // Cancel erkennen
+      input.addEventListener('cancel', () => resolve(null));
+      input.click();
+    });
+  },
+
+  /**
+   * Bild per Canvas API zu WebP konvertieren
+   * @param {File} file
+   * @returns {Promise<string>} WebP DataURL
+   */
+  _processFile(file) {
+    return new Promise((resolve, reject) => {
+      const objectUrl = URL.createObjectURL(file);
+      const img = new Image();
+
+      img.onload = () => {
+        try {
+          const canvas = document.createElement('canvas');
+          canvas.width = img.width;
+          canvas.height = img.height;
+          const ctx = canvas.getContext('2d');
+          ctx.drawImage(img, 0, 0);
+          const webpUrl = canvas.toDataURL('image/webp', 0.85);
+          URL.revokeObjectURL(objectUrl);
+          resolve(webpUrl);
+        } catch (err) {
+          URL.revokeObjectURL(objectUrl);
+          reject(err);
+        }
+      };
+
+      img.onerror = () => {
+        URL.revokeObjectURL(objectUrl);
+        reject(new Error('Bild konnte nicht geladen werden'));
+      };
+
+      img.src = objectUrl;
+    });
+  },
+
+  // ---- INIT ----
+
+  /**
+   * ImageRef initialisieren (aus app.js aufgerufen)
+   */
+  async init() {
+    await this.load();
+
+    // Widgets wiederherstellen (nur wenn Feature aktiviert)
+    if (settings.imageRefEnabled && this._images.length > 0) {
+      const sessionData = this._loadSessionAll();
+
+      this._images.forEach(imageData => {
+        if (imageData.open !== false) {
+          const dataUrl = sessionData[imageData.id] || null;
+          this._createWidget(imageData, dataUrl);
+        }
+      });
+    }
+
+    // Close-Event abfangen
+    const self = this;
+    const prevClose = WidgetManager.close;
+    WidgetManager.close = function(id) {
+      prevClose.call(WidgetManager, id);
+      // Pruefen ob es ein Image-Widget ist
+      const isImage = self._images.some(img => img.id === id);
+      if (isImage) {
+        self.onClose(id);
+      }
+    };
+
+    // Minimize-Event abfangen
+    const prevMinimize = WidgetManager.minimize;
+    WidgetManager.minimize = async function(id) {
+      await prevMinimize.call(WidgetManager, id);
+      const isImage = self._images.some(img => img.id === id);
+      if (isImage) {
+        await self.save();
+      }
+    };
+
+    // Open-Event abfangen
+    const prevOpen = WidgetManager.openWidget;
+    WidgetManager.openWidget = async function(id) {
+      await prevOpen.call(WidgetManager, id);
+      const imgData = self._images.find(img => img.id === id);
+      if (imgData) {
+        const body = WidgetManager.getBody(id);
+        if (body && body.children.length === 0) {
+          const dataUrl = self._getSessionImage(id);
+          self.renderBody(imgData, body, dataUrl);
+        }
+        await self.save();
+      }
+    };
+  }
+};

src/js/notes.js

@@ -44,7 +44,19 @@ const Notes = {
       return note;
     });
 
-    await Store.set(this.STORAGE_KEY, { notes: merged });
+    // Calculator- und Timer-State beibehalten falls vorhanden
+    const existing = await Store.get(this.STORAGE_KEY);
+    const saveData = { notes: merged };
+    if (existing && existing.calculator) {
+      saveData.calculator = existing.calculator;
+    }
+    if (existing && existing.timer) {
+      saveData.timer = existing.timer;
+    }
+    if (existing && existing.imageRef) {
+      saveData.imageRef = existing.imageRef;
+    }
+    await Store.set(this.STORAGE_KEY, saveData);
   },
 
   /**
@@ -514,6 +526,12 @@ const Notes = {
         await this.create('text');
       } else if (action === 'new-checklist') {
         await this.create('checklist');
+      } else if (action === 'calculator') {
+        Calculator.toggle();
+      } else if (action === 'timer') {
+        Timer.toggle();
+      } else if (action === 'image-ref') {
+        ImageRef.create();
       } else if (action === 'notebook') {
         this.openNotebook();
       }

src/js/onboarding.js

@@ -25,17 +25,19 @@ const Onboarding = {
     {
       hero: '\uD83C\uDFA8',
       title: '8 handgefertigte Themes',
-      text: 'Klicke auf den „Theme" Button im Header um dein Theme zu wählen. Jedes hat seinen eigenen Stil und Farbpalette.',
+      text: 'Klicke auf den \u201ETheme\u201C Button im Header um dein Theme zu w\u00E4hlen. Jedes hat seinen eigenen Stil und Farbpalette.',
       showThemes: true
     },
     {
-      hero: '\u26A1',
-      title: 'Weitere Features',
+      hero: '\uD83E\uDDF0',
+      title: 'Widget-Toolbar',
       features: [
-        'Suchleiste mit Google, DuckDuckGo oder Bing',
-        'Widget-Toolbar rechts \u2014 Notes und Checklisten erstellen',
-        'Notebook-Sidebar \u00FCber den \u201ENote\u201C Button oder die Toolbar',
-        'Funktioniert komplett offline \u2014 alles lokal gespeichert'
+        'Die schwebenden Buttons rechts \u00F6ffnen Widgets',
+        'Notes und Checklisten f\u00FCr schnelle Notizen',
+        'Taschenrechner mit History',
+        'Timer/Countdown mit speicherbaren Presets',
+        'Bild-Referenz Widgets (aktivierbar in Settings)',
+        'Notebook-Sidebar zeigt alle Notes auf einen Blick'
       ]
     },
     {
@@ -43,10 +45,16 @@ const Onboarding = {
       title: 'Backups nicht vergessen!',
       text: 'Deine Daten sind lokal im Browser gespeichert. Wenn du Browserdaten l\u00F6schst, gehen sie verloren! Sichere regelm\u00E4\u00DFig \u00FCber Settings \u2192 Data \u2192 Export. Wir erinnern dich alle 7 Tage daran.'
     },
+    {
+      hero: '\uD83C\uDFAE',
+      title: 'Gaming Starter Board',
+      text: 'Spielst du Games wie Satisfactory, Factorio oder Star Citizen? Ich kann ein Board mit n\u00FCtzlichen Community-Links anlegen.',
+      interactive: 'gaming-board'
+    },
     {
       hero: '\uD83D\uDE80',
       title: 'Bereit!',
-      text: 'Klicke auf \u201E+ Board\u201C um dein erstes Board zu erstellen, oder nutze den \u201EImport\u201C Button im Header um deine Browser-Lesezeichen zu importieren.'
+      text: 'Erstelle dein erstes Board mit \u201E+ Board\u201C oder importiere deine Browser-Lesezeichen \u00FCber den Import-Button im Header. Viel Spa\u00DF!'
     }
   ],
 
@@ -160,7 +168,27 @@ const Onboarding = {
       nav.appendChild(backBtn);
     }
 
-    if (isLast) {
+    if (slide.interactive === 'gaming-board') {
+      // Interaktive Slide: Zwei Buttons statt "Weiter"
+      const noBtn = document.createElement('button');
+      noBtn.className = 'btn-secondary';
+      noBtn.textContent = 'Nein danke';
+      noBtn.addEventListener('click', () => {
+        this.currentSlide++;
+        this._render();
+      });
+
+      const yesBtn = document.createElement('button');
+      yesBtn.className = 'btn-primary';
+      yesBtn.textContent = 'Ja, gerne';
+      yesBtn.addEventListener('click', async () => {
+        await this._createGamingBoard();
+        this.currentSlide++;
+        this._render();
+      });
+
+      nav.append(noBtn, yesBtn);
+    } else if (isLast) {
       const startBtn = document.createElement('button');
       startBtn.className = 'btn-primary';
       startBtn.textContent = 'Los geht\u2019s!';
@@ -181,6 +209,34 @@ const Onboarding = {
     modal.appendChild(footer);
   },
 
+  /**
+   * Gaming Starter Board erstellen
+   * Vorbefuelltes Board mit Community-Links fuer Factory/Space Games
+   */
+  async _createGamingBoard() {
+    const gamingBoard = {
+      id: uid(),
+      title: '\uD83C\uDFAE Gaming',
+      bookmarks: [
+        { id: uid(), title: 'Satisfactory Wiki', url: 'https://satisfactory.wiki.gg', desc: '' },
+        { id: uid(), title: 'Satisfactory Calculator', url: 'https://satisfactorytools.com', desc: '' },
+        { id: uid(), title: 'Factorio Wiki', url: 'https://wiki.factorio.com', desc: '' },
+        { id: uid(), title: 'Factorio Cheatsheet', url: 'https://factoriocheatsheet.com', desc: '' },
+        { id: uid(), title: 'Avorion Wiki', url: 'https://wiki.avorion.net', desc: '' },
+        { id: uid(), title: 'Minecraft Wiki', url: 'https://minecraft.wiki', desc: '' },
+        { id: uid(), title: 'Modrinth (Mods)', url: 'https://modrinth.com', desc: '' },
+        { id: uid(), title: 'Star Citizen Wiki', url: 'https://starcitizen.tools', desc: '' },
+        { id: uid(), title: 'UEX Corp (Trading)', url: 'https://uexcorp.space', desc: '' },
+        { id: uid(), title: 'Hellion TradeCenter', url: 'https://hellion-initiative.online/tradecenter', desc: 'Trade Center f\u00FCr Star Citizen' }
+      ],
+      blurred: false
+    };
+
+    boards.push(gamingBoard);
+    await saveBoards();
+    renderBoards();
+  },
+
   /** Keyboard-Navigation */
   _bindKeyboard() {
     this._keyHandler = (e) => {

src/js/settings.js

@@ -25,7 +25,7 @@ function closeThemeModal() {
 
 // ---- ACCORDION ----
 function initAccordion() {
-  const defaultOpen = new Set(['appearance', 'behavior', 'widgets', 'data', 'help']);
+  const defaultOpen = new Set(['widgets']);
   const sections = document.querySelectorAll('.settings-section[data-section]');
 
   sections.forEach(section => {
@@ -71,6 +71,13 @@ function applySettings() {
   const showSearchEl = document.getElementById('settingShowSearch');
   if (showSearchEl) showSearchEl.checked = settings.showSearch;
 
+  // Image-Ref Toggle
+  if (settings.imageRefEnabled === undefined) settings.imageRefEnabled = false;
+  const imgRefCheckbox = document.getElementById('settingImageRef');
+  if (imgRefCheckbox) imgRefCheckbox.checked = settings.imageRefEnabled;
+  const imgRefBtn = document.querySelector('[data-action="image-ref"]');
+  if (imgRefBtn) imgRefBtn.classList.toggle('hidden', !settings.imageRefEnabled);
+
   // Toolbar-Position
   document.body.classList.toggle('toolbar-left', settings.toolbarPos === 'left');
   const toolbarPosEl = document.getElementById('settingToolbarPos');
@@ -127,6 +134,11 @@ function bindSettingsEvents() {
     settingShowSearch: v => {
       settings.showSearch = v;
       document.getElementById('searchBarWrapper').classList.toggle('hidden', !v);
+    },
+    settingImageRef: v => {
+      settings.imageRefEnabled = v;
+      const imgBtn = document.querySelector('[data-action="image-ref"]');
+      if (imgBtn) imgBtn.classList.toggle('hidden', !v);
     }
   };
 
@@ -204,7 +216,8 @@ function bindSettingsEvents() {
     boards   = [];
     settings = { compact: false, shortenTitles: false, newTab: true, showDesc: false,
                  hideExtra: false, visibleCount: 10, bgUrl: '', theme: 'nebula',
-                 showSearch: true, searchEngine: 'google', toolbarPos: 'right' };
+                 showSearch: true, searchEngine: 'google', toolbarPos: 'right',
+                 imageRefEnabled: false };
     await saveBoards();
     await saveSettings();
     applySettings();

src/js/state.js

@@ -16,7 +16,8 @@ let settings = {
   theme:         'nebula',
   showSearch:    true,
   searchEngine:  'google',
-  toolbarPos:    'right'
+  toolbarPos:    'right',
+  imageRefEnabled: false
 };
 
 function uid() {

src/js/timer.js

@@ -0,0 +1,760 @@
+/* =============================================
+   HELLION NEWTAB — timer.js
+   Timer / Countdown Widget: Presets, Alarm,
+   Tab-Titel-Blink
+   ============================================= */
+
+const Timer = {
+  WIDGET_ID: 'widget_timer',
+  STORAGE_KEY: 'widgetStates',
+  MAX_PRESETS: 5,
+
+  /** @type {Array<{name: string, seconds: number}>} */
+  _presets: [],
+  _isOpen: false,
+  _seconds: 0,
+  _remaining: 0,
+  _intervalId: null,
+  _running: false,
+  _finished: false,
+  _blinkIntervalId: null,
+  _originalTitle: '',
+  _keydownHandler: null,
+  _muted: false,
+
+  // UI-Referenzen
+  _timeEl: null,
+  _muteBtn: null,
+  _inputEl: null,
+  _inputRow: null,
+  _btnStart: null,
+  _btnPause: null,
+  _btnReset: null,
+
+  // ---- STORAGE ----
+
+  /**
+   * Timer-State aus Storage laden
+   */
+  async load() {
+    const data = await Store.get(this.STORAGE_KEY);
+    if (data && data.timer) {
+      this._presets = Array.isArray(data.timer.presets) ? data.timer.presets : [];
+      if (typeof data.timer.muted === 'boolean') this._muted = data.timer.muted;
+    }
+  },
+
+  /**
+   * Timer-State in Storage speichern
+   * Bestehende Notes + Calculator bleiben erhalten
+   */
+  async save() {
+    const data = await Store.get(this.STORAGE_KEY) || {};
+    if (data.notes === undefined) data.notes = [];
+
+    const widgetState = WidgetManager.getState(this.WIDGET_ID);
+    data.timer = {
+      x: widgetState ? widgetState.x : 600,
+      y: widgetState ? widgetState.y : 80,
+      width: widgetState ? widgetState.width : 260,
+      height: widgetState ? widgetState.height : 360,
+      open: this._isOpen,
+      presets: this._presets.slice(0, this.MAX_PRESETS),
+      muted: this._muted
+    };
+
+    await Store.set(this.STORAGE_KEY, data);
+  },
+
+  // ---- WIDGET LIFECYCLE ----
+
+  /**
+   * Timer-Widget oeffnen oder in Vordergrund bringen
+   */
+  async open() {
+    if (this._isOpen) {
+      WidgetManager.bringToFront(this.WIDGET_ID);
+      return;
+    }
+
+    const data = await Store.get(this.STORAGE_KEY);
+    const saved = (data && data.timer) ? data.timer : {};
+
+    WidgetManager.create('timer', {
+      id: this.WIDGET_ID,
+      title: 'Timer',
+      x: saved.x || 600,
+      y: saved.y || 80,
+      width: saved.width || 260,
+      height: saved.height || 360,
+      open: true
+    });
+
+    const body = WidgetManager.getBody(this.WIDGET_ID);
+    if (body) this.renderBody(body);
+
+    this._isOpen = true;
+
+    const entry = WidgetManager._widgets.get(this.WIDGET_ID);
+    if (entry) this._bindKeyboard(entry.el);
+
+    await this.save();
+  },
+
+  /**
+   * Timer toggle: oeffnen oder minimieren
+   */
+  async toggle() {
+    if (this._isOpen) {
+      const entry = WidgetManager._widgets.get(this.WIDGET_ID);
+      if (entry && entry.state.open) {
+        await WidgetManager.minimize(this.WIDGET_ID);
+        this._isOpen = false;
+        await this.save();
+      } else if (entry) {
+        await WidgetManager.openWidget(this.WIDGET_ID);
+        this._isOpen = true;
+        await this.save();
+      }
+    } else {
+      await this.open();
+    }
+  },
+
+  /**
+   * Wird aufgerufen wenn Widget geschlossen wird
+   */
+  async onClose() {
+    this._isOpen = false;
+    this._unbindKeyboard();
+    this._stopCountdown();
+    this._stopAlarm();
+    this._timeEl = null;
+    this._inputEl = null;
+    this._inputRow = null;
+    this._btnStart = null;
+    this._btnPause = null;
+    this._btnReset = null;
+    this._muteBtn = null;
+    await this.save();
+  },
+
+  // ---- UI RENDERING ----
+
+  /**
+   * Timer-Body rendern
+   * @param {HTMLElement} bodyEl
+   */
+  renderBody(bodyEl) {
+    bodyEl.textContent = '';
+    bodyEl.style.padding = '8px';
+    bodyEl.style.display = 'flex';
+    bodyEl.style.flexDirection = 'column';
+
+    // Display
+    const display = document.createElement('div');
+    display.className = 'timer-display';
+
+    const timeEl = document.createElement('div');
+    timeEl.className = 'timer-time';
+    timeEl.textContent = '00:00';
+    this._timeEl = timeEl;
+    display.appendChild(timeEl);
+
+    // Input
+    const inputRow = document.createElement('div');
+    inputRow.className = 'timer-input-row';
+    this._inputRow = inputRow;
+
+    const input = document.createElement('input');
+    input.className = 'timer-input';
+    input.type = 'text';
+    input.placeholder = 'mm:ss';
+    input.maxLength = 8;
+    this._inputEl = input;
+
+    input.addEventListener('keydown', (e) => {
+      if (e.key === 'Enter') {
+        e.preventDefault();
+        this._applyInput();
+        this._start();
+      }
+    });
+
+    inputRow.appendChild(input);
+
+    // Controls
+    const controls = document.createElement('div');
+    controls.className = 'timer-controls';
+
+    const btnStart = document.createElement('button');
+    btnStart.className = 'timer-ctrl-btn primary';
+    btnStart.type = 'button';
+    btnStart.textContent = 'Start';
+    btnStart.addEventListener('click', () => {
+      if (!this._running && this._remaining === 0) {
+        this._applyInput();
+      }
+      this._start();
+    });
+    this._btnStart = btnStart;
+
+    const btnPause = document.createElement('button');
+    btnPause.className = 'timer-ctrl-btn';
+    btnPause.type = 'button';
+    btnPause.textContent = 'Pause';
+    btnPause.disabled = true;
+    btnPause.addEventListener('click', () => this._pause());
+    this._btnPause = btnPause;
+
+    const btnReset = document.createElement('button');
+    btnReset.className = 'timer-ctrl-btn danger';
+    btnReset.type = 'button';
+    btnReset.textContent = 'Reset';
+    btnReset.addEventListener('click', () => this._reset());
+    this._btnReset = btnReset;
+
+    controls.append(btnStart, btnPause, btnReset);
+
+    // Mute Toggle (in Controls-Zeile)
+    const muteBtn = document.createElement('button');
+    muteBtn.className = 'timer-mute-btn';
+    muteBtn.type = 'button';
+    this._muteBtn = muteBtn;
+    this._updateMuteBtn();
+    muteBtn.addEventListener('click', async () => {
+      this._muted = !this._muted;
+      this._updateMuteBtn();
+      await this.save();
+    });
+    controls.appendChild(muteBtn);
+
+    // Presets
+    const presetsEl = this._createPresetsPanel();
+
+    bodyEl.append(display, inputRow, controls, presetsEl);
+
+    // State wiederherstellen
+    this._updateDisplay();
+    this._updateControls();
+  },
+
+  /**
+   * Presets-Panel erstellen
+   * @returns {HTMLElement}
+   */
+  _createPresetsPanel() {
+    const container = document.createElement('div');
+    container.className = 'timer-presets';
+    container.id = 'timerPresetsPanel';
+
+    const header = document.createElement('div');
+    header.className = 'timer-presets-header';
+
+    const title = document.createElement('span');
+    title.className = 'timer-presets-title';
+    title.textContent = 'Presets';
+
+    const addBtn = document.createElement('button');
+    addBtn.className = 'timer-preset-add';
+    addBtn.type = 'button';
+    addBtn.textContent = '+';
+    addBtn.title = 'Preset speichern';
+    addBtn.addEventListener('click', () => this._showAddPreset(container));
+
+    header.append(title, addBtn);
+    container.appendChild(header);
+
+    this._renderPresetItems(container);
+
+    return container;
+  },
+
+  /**
+   * Preset-Items rendern
+   * @param {HTMLElement} container
+   */
+  _renderPresetItems(container) {
+    // Alte Items entfernen
+    const oldItems = container.querySelectorAll('.timer-preset-item, .timer-add-row');
+    oldItems.forEach(item => item.remove());
+
+    this._presets.forEach((preset, idx) => {
+      const item = document.createElement('div');
+      item.className = 'timer-preset-item';
+
+      const name = document.createElement('span');
+      name.className = 'timer-preset-name';
+      name.textContent = preset.name;
+
+      const time = document.createElement('span');
+      time.className = 'timer-preset-time';
+      time.textContent = this._formatTime(preset.seconds);
+
+      const del = document.createElement('button');
+      del.className = 'timer-preset-del';
+      del.type = 'button';
+      del.textContent = '\u2715';
+      del.addEventListener('click', async (e) => {
+        e.stopPropagation();
+        await this._deletePreset(idx);
+        this._renderPresetItems(container);
+      });
+
+      item.append(name, time, del);
+
+      // Klick laedt Preset
+      item.addEventListener('click', () => {
+        this._loadPreset(preset);
+      });
+
+      container.appendChild(item);
+    });
+  },
+
+  /**
+   * Add-Preset UI anzeigen
+   * @param {HTMLElement} container
+   */
+  _showAddPreset(container) {
+    // Nur einmal anzeigen
+    if (container.querySelector('.timer-add-row')) return;
+
+    if (this._presets.length >= this.MAX_PRESETS) {
+      HellionDialog.alert(
+        'Maximale Anzahl erreicht! Du kannst maximal ' + this.MAX_PRESETS + ' Presets speichern.',
+        { type: 'warning', title: 'Limit erreicht' }
+      );
+      return;
+    }
+
+    // Aktuelle Zeit als Vorlage
+    const currentSeconds = this._remaining > 0 ? this._seconds : 0;
+    if (currentSeconds === 0 && this._inputEl) {
+      const parsed = this._parseTimeInput(this._inputEl.value);
+      if (parsed === 0) {
+        HellionDialog.alert(
+          'Gib zuerst eine Zeit ein, bevor du ein Preset speicherst.',
+          { type: 'info', title: 'Keine Zeit' }
+        );
+        return;
+      }
+    }
+
+    const row = document.createElement('div');
+    row.className = 'timer-add-row';
+
+    const nameInput = document.createElement('input');
+    nameInput.className = 'timer-add-input';
+    nameInput.type = 'text';
+    nameInput.placeholder = 'Name...';
+    nameInput.maxLength = 20;
+
+    const confirmBtn = document.createElement('button');
+    confirmBtn.className = 'timer-add-confirm';
+    confirmBtn.type = 'button';
+    confirmBtn.textContent = 'OK';
+
+    const doAdd = async () => {
+      const name = nameInput.value.trim();
+      if (!name) return;
+
+      let secs = this._seconds;
+      if (secs === 0 && this._inputEl) {
+        secs = this._parseTimeInput(this._inputEl.value);
+      }
+      if (secs === 0) return;
+
+      await this._addPreset(name, secs);
+      this._renderPresetItems(container);
+    };
+
+    confirmBtn.addEventListener('click', doAdd);
+    nameInput.addEventListener('keydown', (e) => {
+      if (e.key === 'Enter') doAdd();
+      if (e.key === 'Escape') row.remove();
+    });
+
+    row.append(nameInput, confirmBtn);
+    container.appendChild(row);
+    nameInput.focus();
+  },
+
+  // ---- TIMER LOGIC ----
+
+  /**
+   * Input-Feld auslesen und als Sekunden setzen
+   */
+  _applyInput() {
+    if (!this._inputEl) return;
+    const secs = this._parseTimeInput(this._inputEl.value);
+    if (secs > 0) {
+      this._seconds = secs;
+      this._remaining = secs;
+    }
+  },
+
+  /**
+   * Timer starten
+   */
+  _start() {
+    if (this._running) return;
+    if (this._remaining <= 0) return;
+
+    // Falls gerade Alarm laeuft, stoppen
+    if (this._finished) {
+      this._stopAlarm();
+      this._finished = false;
+    }
+
+    this._running = true;
+    this._updateControls();
+
+    // Input verstecken
+    if (this._inputRow) this._inputRow.style.display = 'none';
+
+    this._intervalId = setInterval(() => this._tick(), 1000);
+  },
+
+  /**
+   * Timer pausieren
+   */
+  _pause() {
+    if (!this._running) return;
+    this._running = false;
+    this._stopCountdown();
+    this._updateControls();
+  },
+
+  /**
+   * Timer zuruecksetzen
+   */
+  _reset() {
+    this._stopCountdown();
+    this._stopAlarm();
+    this._running = false;
+    this._finished = false;
+    this._remaining = 0;
+    this._seconds = 0;
+
+    // Input wieder anzeigen
+    if (this._inputRow) this._inputRow.style.display = 'flex';
+    if (this._inputEl) this._inputEl.value = '';
+
+    this._updateDisplay();
+    this._updateControls();
+  },
+
+  /**
+   * Jede Sekunde: remaining verringern, Display aktualisieren
+   */
+  _tick() {
+    this._remaining--;
+
+    if (this._remaining <= 0) {
+      this._remaining = 0;
+      this._stopCountdown();
+      this._running = false;
+      this._finished = true;
+      this._onFinish();
+    }
+
+    this._updateDisplay();
+    this._updateControls();
+  },
+
+  /**
+   * Interval stoppen
+   */
+  _stopCountdown() {
+    if (this._intervalId) {
+      clearInterval(this._intervalId);
+      this._intervalId = null;
+    }
+  },
+
+  /**
+   * Timer abgelaufen — Alarm + Tab-Blink
+   */
+  _onFinish() {
+    if (!this._muted) this._playAlarm();
+    this._startTitleBlink();
+  },
+
+  /**
+   * Akustisches Signal (Browser Audio API, kein externer Request)
+   */
+  _playAlarm() {
+    try {
+      const ctx = new AudioContext();
+      [0, 0.3, 0.6].forEach(delay => {
+        const osc = ctx.createOscillator();
+        const gain = ctx.createGain();
+        osc.connect(gain);
+        gain.connect(ctx.destination);
+        osc.frequency.value = 800;
+        gain.gain.value = 0.07;
+        osc.start(ctx.currentTime + delay);
+        osc.stop(ctx.currentTime + delay + 0.2);
+      });
+    } catch (e) {
+      console.warn('Timer: Audio nicht verfuegbar', e);
+    }
+  },
+
+  /**
+   * Tab-Titel blinken lassen
+   */
+  _startTitleBlink() {
+    this._originalTitle = document.title;
+    this._blinkIntervalId = setInterval(() => {
+      document.title = document.title === '[!] Timer abgelaufen'
+        ? this._originalTitle
+        : '[!] Timer abgelaufen';
+    }, 1000);
+  },
+
+  /**
+   * Tab-Titel Blink und Alarm stoppen
+   */
+  _stopAlarm() {
+    if (this._blinkIntervalId) {
+      clearInterval(this._blinkIntervalId);
+      this._blinkIntervalId = null;
+      document.title = this._originalTitle || 'Hellion Dashboard';
+    }
+    this._finished = false;
+    this._updateDisplay();
+    this._updateControls();
+  },
+
+  /**
+   * Mute-Button Text/Titel aktualisieren
+   */
+  _updateMuteBtn() {
+    if (!this._muteBtn) return;
+    this._muteBtn.textContent = this._muted ? '\uD83D\uDD07' : '\uD83D\uDD0A';
+    this._muteBtn.title = this._muted ? 'Ton einschalten' : 'Ton ausschalten';
+    this._muteBtn.classList.toggle('muted', this._muted);
+  },
+
+  // ---- DISPLAY ----
+
+  /**
+   * Zeitanzeige aktualisieren
+   */
+  _updateDisplay() {
+    if (!this._timeEl) return;
+    this._timeEl.textContent = this._formatTime(this._remaining);
+    this._timeEl.classList.toggle('finished', this._finished);
+  },
+
+  /**
+   * Button-States aktualisieren
+   */
+  _updateControls() {
+    if (this._btnStart) {
+      this._btnStart.disabled = this._running;
+      this._btnStart.textContent = this._finished ? 'Neustart' : 'Start';
+    }
+    if (this._btnPause) {
+      this._btnPause.disabled = !this._running;
+    }
+  },
+
+  // ---- PRESETS ----
+
+  /**
+   * Preset hinzufuegen
+   * @param {string} name
+   * @param {number} seconds
+   */
+  async _addPreset(name, seconds) {
+    if (this._presets.length >= this.MAX_PRESETS) return;
+    this._presets.push({ name, seconds });
+    await this.save();
+  },
+
+  /**
+   * Preset loeschen
+   * @param {number} index
+   */
+  async _deletePreset(index) {
+    this._presets.splice(index, 1);
+    await this.save();
+  },
+
+  /**
+   * Preset laden (Zeit setzen)
+   * @param {Object} preset - { name, seconds }
+   */
+  _loadPreset(preset) {
+    // Falls laufend, erst stoppen
+    this._stopCountdown();
+    this._stopAlarm();
+    this._running = false;
+    this._finished = false;
+
+    this._seconds = preset.seconds;
+    this._remaining = preset.seconds;
+
+    if (this._inputRow) this._inputRow.style.display = 'none';
+
+    this._updateDisplay();
+    this._updateControls();
+  },
+
+  // ---- FORMATTING ----
+
+  /**
+   * Sekunden in Zeitformat umwandeln
+   * @param {number} totalSeconds
+   * @returns {string} "05:30" oder "1:05:30"
+   */
+  _formatTime(totalSeconds) {
+    const h = Math.floor(totalSeconds / 3600);
+    const m = Math.floor((totalSeconds % 3600) / 60);
+    const s = totalSeconds % 60;
+
+    const mm = String(m).padStart(2, '0');
+    const ss = String(s).padStart(2, '0');
+
+    if (h > 0) {
+      return h + ':' + mm + ':' + ss;
+    }
+    return mm + ':' + ss;
+  },
+
+  /**
+   * Zeit-String in Sekunden parsen
+   * Akzeptiert: "5:30", "05:30", "1:05:30", "90" (Sekunden)
+   * @param {string} str
+   * @returns {number}
+   */
+  _parseTimeInput(str) {
+    const trimmed = (str || '').trim();
+    if (!trimmed) return 0;
+
+    const parts = trimmed.split(':');
+
+    if (parts.length === 1) {
+      // Nur Zahl = Sekunden
+      const secs = parseInt(parts[0], 10);
+      return isNaN(secs) ? 0 : Math.max(0, secs);
+    }
+
+    if (parts.length === 2) {
+      // mm:ss
+      const m = parseInt(parts[0], 10);
+      const s = parseInt(parts[1], 10);
+      if (isNaN(m) || isNaN(s)) return 0;
+      return Math.max(0, m * 60 + s);
+    }
+
+    if (parts.length === 3) {
+      // hh:mm:ss
+      const h = parseInt(parts[0], 10);
+      const m = parseInt(parts[1], 10);
+      const s = parseInt(parts[2], 10);
+      if (isNaN(h) || isNaN(m) || isNaN(s)) return 0;
+      return Math.max(0, h * 3600 + m * 60 + s);
+    }
+
+    return 0;
+  },
+
+  // ---- KEYBOARD ----
+
+  /**
+   * Tastatur-Events binden
+   * @param {HTMLElement} widgetEl
+   */
+  _bindKeyboard(widgetEl) {
+    this._unbindKeyboard();
+
+    this._keydownHandler = (e) => {
+      // Nicht reagieren wenn User in Input tippt
+      if (e.target.tagName === 'INPUT') return;
+
+      if (e.key === ' ' || e.key === 'Enter') {
+        e.preventDefault();
+        if (this._running) {
+          this._pause();
+        } else if (this._remaining > 0) {
+          this._start();
+        }
+      } else if (e.key === 'Escape' || e.key === 'r' || e.key === 'R') {
+        e.preventDefault();
+        this._reset();
+      }
+    };
+
+    widgetEl.addEventListener('keydown', this._keydownHandler);
+    widgetEl.tabIndex = 0;
+  },
+
+  /**
+   * Keyboard-Events entfernen
+   */
+  _unbindKeyboard() {
+    if (this._keydownHandler) {
+      const entry = WidgetManager._widgets.get(this.WIDGET_ID);
+      if (entry) {
+        entry.el.removeEventListener('keydown', this._keydownHandler);
+      }
+      this._keydownHandler = null;
+    }
+  },
+
+  // ---- INIT ----
+
+  /**
+   * Timer initialisieren (aus app.js aufgerufen)
+   */
+  async init() {
+    await this.load();
+
+    // Wenn Timer beim letzten Mal offen war, wiederherstellen
+    const data = await Store.get(this.STORAGE_KEY);
+    if (data && data.timer && data.timer.open) {
+      await this.open();
+    }
+
+    // Close-Event abfangen
+    const origClose = WidgetManager.close.bind(WidgetManager);
+    const self = this;
+    const prevClose = WidgetManager.close;
+    WidgetManager.close = function(id) {
+      prevClose.call(WidgetManager, id);
+      if (id === self.WIDGET_ID) {
+        self.onClose();
+      }
+    };
+
+    // Minimize-Event abfangen
+    const prevMinimize = WidgetManager.minimize;
+    WidgetManager.minimize = async function(id) {
+      await prevMinimize.call(WidgetManager, id);
+      if (id === self.WIDGET_ID) {
+        self._isOpen = false;
+        await self.save();
+      }
+    };
+
+    // Open-Event abfangen
+    const prevOpen = WidgetManager.openWidget;
+    WidgetManager.openWidget = async function(id) {
+      await prevOpen.call(WidgetManager, id);
+      if (id === self.WIDGET_ID) {
+        self._isOpen = true;
+        const body = WidgetManager.getBody(self.WIDGET_ID);
+        if (body && body.children.length === 0) {
+          self.renderBody(body);
+        }
+        const entry = WidgetManager._widgets.get(self.WIDGET_ID);
+        if (entry) self._bindKeyboard(entry.el);
+        await self.save();
+      }
+    };
+  }
+};

src/js/widgets.js

@@ -6,7 +6,7 @@
 const WidgetManager = {
   /** @type {Map<string, {el: HTMLElement, type: string, state: Object}>} */
   _widgets: new Map(),
-  _topZ: 51,
+  _topZ: 100,
   STORAGE_KEY: 'widgetStates',
 
   /**