Convert tool to Chrome extension

Author: lovable-dev[bot]

.env

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+VITE_SUPABASE_PROJECT_ID="oomaeqgizcctwrjzfpgr"
+VITE_SUPABASE_PUBLISHABLE_KEY="eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpc3MiOiJzdXBhYmFzZSIsInJlZiI6Im9vbWFlcWdpemNjdHdyanpmcGdyIiwicm9sZSI6ImFub24iLCJpYXQiOjE3NTc0OTQ0NTYsImV4cCI6MjA3MzA3MDQ1Nn0.4NlMI1cJUrgfxfJ2EY86K7tTUdePFD4TLzRQ0ixVdiU"
+VITE_SUPABASE_URL="https://oomaeqgizcctwrjzfpgr.supabase.co"

extension/README.md

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+# Plagiarism & AI Content Checker - Chrome Extension
+
+A powerful Chrome extension that helps detect AI-generated content and potential plagiarism in selected text across any website.
+
+## Features
+
+- **Right-click Analysis**: Select text on any webpage, right-click, and choose "Plagiarism & AI Content Checker"
+- **Instant Detection**: Quickly analyze text for AI generation patterns and plagiarism
+- **Detailed Results**: Get percentage scores and highlighted segments showing different content types
+- **Clean Interface**: Professional popup design with easy-to-understand results
+- **Cross-site Compatibility**: Works on all websites and web pages
+
+## Installation
+
+### From Chrome Web Store (Recommended)
+1. Visit the Chrome Web Store
+2. Search for "Plagiarism & AI Content Checker"
+3. Click "Add to Chrome"
+4. Confirm installation
+
+### Manual Installation (Developer Mode)
+1. Download or clone this repository
+2. Open Chrome and navigate to `chrome://extensions/`
+3. Enable "Developer mode" in the top-right corner
+4. Click "Load unpacked" and select the `extension` folder
+5. The extension will be installed and ready to use
+
+## How to Use
+
+### Method 1: Context Menu (Recommended)
+1. Select any text on a webpage
+2. Right-click to open the context menu
+3. Click "Plagiarism & AI Content Checker"
+4. The extension popup will open with your selected text ready for analysis
+5. Click "Analyze Text" or wait for automatic analysis
+
+### Method 2: Manual Input
+1. Click the extension icon in the Chrome toolbar
+2. Paste or type your text in the input area
+3. Click "Analyze Text" to start the analysis
+4. Review the detailed results
+
+## Results Explanation
+
+The extension provides three main scores:
+
+- **Original Content** (Green): Percentage of text that appears to be originally written
+- **AI Generated** (Orange): Percentage of text that shows patterns of AI generation
+- **Potentially Plagiarized** (Red): Percentage of text that may be copied from other sources
+
+## Privacy & Security
+
+- **No Data Collection**: Your text is analyzed locally and never sent to external servers
+- **Secure Processing**: All analysis happens within your browser
+- **No Account Required**: Use the extension without signing up or providing personal information
+
+## Technical Details
+
+- **Manifest Version**: 3 (Latest Chrome Extension standard)
+- **Permissions**: 
+  - `contextMenus`: For right-click menu integration
+  - `activeTab`: For accessing selected text on current page
+  - `storage`: For temporary text storage between context menu and popup
+- **Offline Capable**: Works without internet connection
+
+## Development
+
+### Building for Chrome Web Store
+
+1. Ensure all files are in the `extension/` folder
+2. Zip the contents of the `extension/` folder (not the folder itself)
+3. The zip file should contain: `manifest.json`, `background.js`, `content.js`, `popup.html`, `popup.js`, and `icons/` folder
+4. Upload the zip file to the Chrome Web Store Developer Dashboard
+
+### File Structure
+```
+extension/
+├── manifest.json       # Extension configuration
+├── background.js       # Service worker for context menu
+├── content.js         # Content script for text selection
+├── popup.html         # Extension popup interface
+├── popup.js           # Popup functionality
+├── icons/             # Extension icons
+│   ├── icon16.png
+│   ├── icon32.png
+│   ├── icon48.png
+│   └── icon128.png
+└── README.md          # This file
+```
+
+## Version History
+
+- **v1.0.0**: Initial release with context menu integration and text analysis
+
+## Support
+
+For issues or feature requests, please visit the Chrome Web Store listing or contact support.
+
+## License
+
+This extension is provided as-is for text analysis purposes. Please ensure you have the right to analyze any text you process.

extension/background.js

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+// Background script for Chrome extension
+chrome.runtime.onInstalled.addListener(() => {
+  // Create context menu item
+  chrome.contextMenus.create({
+    id: "plagiarismChecker",
+    title: "Plagiarism & AI Content Checker",
+    contexts: ["selection"]
+  });
+});
+
+// Handle context menu clicks
+chrome.contextMenus.onClicked.addListener((info, tab) => {
+  if (info.menuItemId === "plagiarismChecker" && info.selectionText) {
+    // Store selected text
+    chrome.storage.local.set({ 
+      selectedText: info.selectionText,
+      analysisRequested: true 
+    });
+    
+    // Open extension popup
+    chrome.action.openPopup();
+  }
+});
+
+// Listen for messages from content script or popup
+chrome.runtime.onMessage.addListener((request, sender, sendResponse) => {
+  if (request.action === "getSelectedText") {
+    chrome.storage.local.get(["selectedText", "analysisRequested"], (result) => {
+      sendResponse({
+        text: result.selectedText || "",
+        autoAnalyze: result.analysisRequested || false
+      });
+      
+      // Clear the flag after sending
+      if (result.analysisRequested) {
+        chrome.storage.local.set({ analysisRequested: false });
+      }
+    });
+    return true; // Keep message channel open
+  }
+});

extension/content.js

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+// Content script for handling text selection
+let selectedText = "";
+
+// Track text selection
+document.addEventListener('mouseup', () => {
+  const selection = window.getSelection();
+  if (selection.toString().trim().length > 0) {
+    selectedText = selection.toString().trim();
+  }
+});
+
+// Listen for messages from popup
+chrome.runtime.onMessage.addListener((request, sender, sendResponse) => {
+  if (request.action === "getCurrentSelection") {
+    const selection = window.getSelection();
+    const currentText = selection.toString().trim();
+    sendResponse({ text: currentText || selectedText });
+  }
+});
+
+// Clear selection tracking on page navigation
+window.addEventListener('beforeunload', () => {
+  selectedText = "";
+});

extension/icons/icon128.png

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+{
+  "manifest_version": 3,
+  "name": "Plagiarism & AI Content Checker",
+  "version": "1.0.0",
+  "description": "Detect AI-generated content and potential plagiarism in selected text with advanced analysis.",
+  "permissions": [
+    "contextMenus",
+    "activeTab",
+    "storage"
+  ],
+  "background": {
+    "service_worker": "background.js"
+  },
+  "content_scripts": [
+    {
+      "matches": ["<all_urls>"],
+      "js": ["content.js"]
+    }
+  ],
+  "action": {
+    "default_popup": "popup.html",
+    "default_title": "Plagiarism & AI Content Checker",
+    "default_icon": {
+      "16": "icons/icon16.png",
+      "32": "icons/icon32.png",
+      "48": "icons/icon48.png",
+      "128": "icons/icon128.png"
+    }
+  },
+  "icons": {
+    "16": "icons/icon16.png",
+    "32": "icons/icon32.png",
+    "48": "icons/icon48.png",
+    "128": "icons/icon128.png"
+  },
+  "web_accessible_resources": [
+    {
+      "resources": ["popup.html"],
+      "matches": ["<all_urls>"]
+    }
+  ]
+}