docs: document handwriting and gguf features

Author: LeanBitLab

README.md

@@ -17,8 +17,9 @@ This fork adds **optional AI-powered features** using Gemini, Groq, and OpenAI-c
 ## What's New in LeanType
 
 - **[🤖 Multi-Provider AI](docs/FEATURES.md#supported-ai-providers)** - Proofread using **Gemini**, **Groq** (Llama 3, Mixtral), or **OpenAI-compatible** providers. Supports dynamic fetching of latest models directly from providers.
-- **[🛡️ Offline AI](docs/FEATURES.md#5-offline-proofreading-privacy-focused)** - Private, on-device proofreading and translation using ONNX models (Offline build only).
+- **[🛡️ Offline AI (GGUF)](docs/FEATURES.md#5-offline-proofreading-privacy-focused)** - Private, on-device proofreading and translation using local **GGUF models** powered by `llama.cpp` (Offline build only).
 - **🌐 AI Translation** - Translate selected text directly using your chosen AI provider, with a separate model selector.
+- **[✍️ Handwriting Input](docs/FEATURES.md#8-handwriting-input)** - Draw characters directly on a handwriting recognition canvas (Standard version, requires [Leantype-Handwriting-Plugin](https://github.com/LeanBitLab/Leantype-Handwriting-Plugin)).
 - **[🧠 Custom AI Keys](docs/FEATURES.md#4-custom-ai-keys--keywords)** - Assign custom prompts, personas (#editor, #proofread), and custom text labels/tags (showing as themed capsules) to 10 customizable toolbar keys.
 - **📝 Text Expander** - Built-in expansion tool supporting custom shortcuts and dynamic template variables (date, time, clipboard, custom placeholders).
 - **🪟 Floating Keyboard** - Detach the keyboard into a draggable window for seamless multitasking. Includes a persistent mode option to keep the keyboard floating.
@@ -31,7 +32,7 @@ This fork adds **optional AI-powered features** using Gemini, Groq, and OpenAI-c
 - **🔍 Clipboard Search & Undo** - Search through your clipboard history directly from the toolbar, undo accidental item deletions, and fold/collapse pinned items by default to save space.
 - **📸 Screenshot Suggestion & Clipboard** - Suggests recently taken screenshots for quick sharing via the suggestion strip and saves them to your clipboard history.
 - **🔎 Emoji Search** - Search for emojis by name. *Requires loading an Emoji Dictionary.*
-- **🔒 Privacy Choices** - Choose **Standard** (Opt-in AI), **Offline** (Hard-disabled network, offline model load), or **Offline Lite** (Minimalist, no AI) versions.
+- **🔒 Privacy Choices** - Choose **Standard** (Opt-in AI, Handwriting), **Offline** (Hard-disabled network, offline GGUF model load), or **Offline Lite** (Minimalist, no AI) versions.
 
 
 
@@ -76,17 +77,17 @@ This fork adds **optional AI-powered features** using Gemini, Groq, and OpenAI-c
 ### 📦 Choose Your Version
 
 #### 1. Standard Version (`-standard-release.apk`)
-*   **Features:** Full suite including **AI Proofreading**, **AI Translation**, and **Gesture Library Downloader**.
-*   **Permissions:** Request `INTERNET` permission (used *only* when you explicitly use AI features).
-*   **Setup:** Use the built-in downloader for Gesture Typing. Configure AI keys in Settings.
+*   **Features:** Full suite including **AI Proofreading**, **AI Translation**, **Handwriting Input**, and **Gesture Library Downloader**.
+*   **Permissions:** Request `INTERNET` permission (used *only* when you explicitly use AI features, download plugins, or update libraries).
+*   **Setup:** Use the built-in downloader for Gesture Typing and Handwriting Input. Configure AI keys in Settings.
 
 #### 2. Offline Version (`-offline-release.apk`)
-*   **Features:** All UI/UX enhancements and **Offline Neural Proofreading** (ONNX).
+*   **Features:** All UI/UX enhancements and **Offline Neural Proofreading** (via `llama.cpp` using local **GGUF models**).
 *   **Permissions:** **NO INTERNET PERMISSION**. Guaranteed at OS level.
 *   **Best For:** Privacy purists.
 *   **Manual Setup Required:**
     *   **Gesture Typing:** [Download library manually](https://github.com/erkserkserks/openboard/tree/46fdf2b550035ca69299ce312fa158e7ade36967/app/src/main/jniLibs) and load via *Settings > Gesture typing*.
-    *   **Offline AI:** Download ONNX models and load via *Settings > AI Integration*. 👉 **[See Offline Setup Instructions](docs/FEATURES.md#3-offline-proofreading-privacy-focused)**
+    *   **Offline AI:** Download GGUF models and load via *Settings > Advanced > GGUF Model (.gguf)*. 👉 **[See Offline Setup Instructions](docs/FEATURES.md#5-offline-proofreading-privacy-focused)**
 
 #### 3. Offline Lite Version (`-offlinelite-release.apk`)
 *   **Features:** All UI/UX enhancements but **NO AI FEATURES**.

docs/FEATURES.md

@@ -15,13 +15,15 @@ LeanType integrates with AI providers to offer advanced proofreading and transla
 | 🛡️ **[Offline Proofreading](#5-offline-proofreading-privacy-focused)** | Privacy-first, on-device AI. |
 | 📝 **[Text Expander](#6-text-expander)** | Custom text shortcut expansion. |
 | 🖱️ **[Touchpad Mode](#7-touchpad-mode)** | Full-screen touchpad gestures and controls. |
+| ✍️ **[Handwriting Input](#8-handwriting-input)** | Use handwriting recognition to draw letters directly on a canvas. |
 
 ## Summary of New Features
 
 | Feature | Function | Settings Location |
 | :--- | :--- | :--- |
 | **Multi-Provider AI** | Uses Gemini, Groq, or OpenAI to proofread/rewrite text. Fetch latest models dynamically. | `AI Integration > Set AI Provider` |
 | **Offline Proofreading** | Private, on-device AI for grammar (requires downloads). | `AI Integration > Offline Proofreading` |
+| **GGUF Model Support** | Load and run highly quantized, compact GGUF models on-device for offline proofreading/translation. | `Advanced > GGUF Model (.gguf)` |
 | **Custom AI Keys** | 10 toolbar keys with custom prompts, tags (themed capsules), and toggle settings (supports hashtags). | `AI Integration > Custom Keys` |
 | **AI Translation** | Translates selected text via your configured AI provider (includes separate model selector). | Toolbar > Translate Icon |
 | **Floating Keyboard** | Detach the keyboard into a draggable window with a persistent mode option. | Toolbar > Floating Keyboard |
@@ -37,6 +39,7 @@ LeanType integrates with AI providers to offer advanced proofreading and transla
 | **Screenshot on Clipboard** | Automatically saves taken screenshots to your clipboard history. | *Automatic (when enabled)* |
 | **Clipboard Undo** | Undo swipe-to-delete on clipboard items with a timed undo bar. | *Automatic (on swipe delete)* |
 | **Text Expander** | Expand custom shortcuts using dynamic template variables (date, time, clipboard, custom placeholders). | `Text correction > Text Expander` |
+| **Handwriting Input** | Draw letters or words directly on the screen keyboard space to type (standard variant, requires plugin). | `Libraries > Handwriting Input Plugin` |
 
 ---
 
@@ -340,3 +343,33 @@ Touchpad Mode replaces the keyboard with a laptop-style touchpad overlay to cont
 *   **Double Tap**: Copies selected text (or Pastes clipboard contents if no selection exists).
 *   **Triple Tap**: Cuts selected text (or Selects All if no selection exists).
 *   **Press & Hold (Long Press)**: Deletes (backspaces) selection / word to the left. Repeats automatically if held.
+
+---
+
+## 8. Handwriting Input
+
+> [!NOTE]
+> **Availability**: This feature is only available in the **Standard** (`-standard-release.apk`) and **Standard Optimised** build flavors. It is excluded from the **Offline** and **Offline Lite** variants.
+
+LeanType integrates a handwriting recognition canvas that allows you to write characters directly on the keyboard using your finger or a stylus.
+
+### Setup Instructions
+
+1. **Install the Plugin**:
+   * Go to **Settings > Libraries**.
+   * Under **Handwriting Input Plugin**, tap **Download** to pull the latest plugin APK from the [Leantype-Handwriting-Plugin](https://github.com/LeanBitLab/Leantype-Handwriting-Plugin) GitHub repository.
+   * Alternatively, you can tap to load a locally downloaded plugin APK file.
+   * Review the security warning and confirm the installation. The app will verify and register the plugin.
+
+2. **Accessing the Handwriting Key**:
+   * The **Handwriting** icon (represented by a pencil/edit icon) is placed on your keyboard toolbar by default in supported variants.
+   * If it is not showing, you can customize the toolbar under **Settings > Preferences > Keyboard toolbar** to enable it.
+
+### How to Use
+
+1. Tap the **Handwriting** icon in the toolbar.
+2. The keyboard area will switch to a handwriting drawing canvas.
+3. Draw characters, words, or punctuation symbols on the canvas. The keyboard will automatically inputs recognized characters.
+4. Tap the **Clear (X)** button on the bottom row to clear the current drawing canvas.
+5. Tap the **Handwriting** icon again to toggle back to the standard keyboard layout.
+