docs: enhance documentation with threat model, limitations, air-gapped guidance

- Update version to v1.4.4
- Add explicit threat model documentation
- Document known limitations prominently
- Include air-gapped usage recommendations
- Polish all documentation for clarity and examples
- Update README, DEVELOPMENT.md, GEMINI.md, RECOVERY_PLAYBOOK.md

DEVELOPMENT.md

@@ -1,7 +1,7 @@
 Here's your `DEVELOPMENT.md`:
 
 ```markdown
-# Development Guide - SeedPGP v1.1.0
+# Development Guide - SeedPGP v1.4.4
 
 ## Architecture Quick Reference
 

GEMINI.md

@@ -2,10 +2,10 @@
 
 ## Project Overview
 
-**SeedPGP v1.3.0**: Client-side BIP39 mnemonic encryption webapp  
+**SeedPGP v1.4.4**: Client-side BIP39 mnemonic encryption webapp  
 **Stack**: Bun + Vite + React + TypeScript + OpenPGP.js + Tailwind CSS  
-**Deploy**: GitHub Pages (public repo: `seedpgp-web-app`, private source: `seedpgp-web`)  
+**Deploy**: Cloudflare Pages (private repo: `seedpgp-web`)  
-**Live URL**: <https://kccleoc.github.io/seedpgp-web-app/>
+**Live URL**: <https://seedpgp-web.pages.dev/>
 
 ## Core Constraints
 
@@ -130,18 +130,23 @@ bun run preview       # Preview production build
 
 ### Deployment Process
 
-This project is now deployed to Cloudflare Pages for enhanced security.
+**Production:** Cloudflare Pages (auto-deploys from `main` branch)  
+**Live URL:** <https://seedpgp-web.pages.dev>
 
-1. **Private repo** (`seedpgp-web`): Source code, development
+### Cloudflare Pages Setup
-2. **Cloudflare Pages**: Deploys from `seedpgp-web` repo directly.
-3. **GitHub Pages (Legacy)**: `seedpgp-web-app` public repo is retained for historical purposes, but no longer actively deployed to.
 
-### Cloudflare Pages Deployment
+1. **Repository:** `seedpgp-web` (private repo)
+2. **Build command:** `bun run build`
+3. **Output directory:** `dist/`
+4. **Security headers:** Automatically enforced via `public/_headers`
 
-1. Connect GitHub repo (`seedpgp-web`) to Cloudflare Pages.
+### Benefits Over GitHub Pages
-2. Build settings: `bun run build`, output directory: `dist/`.
+
-3. `public/_headers` file enforces Content Security Policy (CSP) and other security headers automatically.
+- ✅ Real CSP header enforcement (blocks network requests at browser level)
-4. Benefits: Real CSP enforcement, not just a UI toggle.
+- ✅ Custom security headers (X-Frame-Options, X-Content-Type-Options)
+- ✅ Auto-deploy on push to main
+- ✅ Build preview for PRs
+- ✅ Better performance (global CDN)
 
 ### Git Workflow
 
@@ -150,10 +155,19 @@ This project is now deployed to Cloudflare Pages for enhanced security.
 git add src/
 git commit -m "feat(v1.x): description"
 
-# Tag version
+# Tag version (triggers auto-deploy to Cloudflare)
 git tag v1.x.x
 git push origin main --tags
 
+# **IMPORTANT: Update README.md before tagging**
+# Update the following sections in README.md:
+# - Current version number in header
+# - Recent Changes section with new features
+# - Any new usage instructions or screenshots
+# Then commit the README update:
+git add README.md
+git commit -m "docs: update README for v1.x.x"
+
 # Deploy to GitHub Pages
 ./scripts/deploy.sh v1.x.x
 ```
@@ -300,26 +314,26 @@ await window.runSessionCryptoTest()
 
 ---
 
-## Current Version: v1.4.0
+## Current Version: v1.4.4
 
-### Recent Changes (2026-01-30)
+**Recent Changes (v1.4.4):**
-- ✅ Extended session-key encryption to Restore flow
+- Enhanced security documentation with explicit threat model
-- ✅ Added 10-second auto-clear timer for restored mnemonic
+- Improved README with simple examples and best practices
-- ✅ Added Hide button for manual clear
+- Better air-gapped usage guidance for maximum security
-- ✅ Removed debug console logs from sessionCrypto.ts
+- Version bump with security audit improvements
 
-### Known Limitations
+**Known Limitations (Critical):**
+1. **Browser extensions** can read DOM, memory, keystrokes - use dedicated browser
+2. **Memory persistence** - JavaScript cannot force immediate memory wiping
+3. **XSS attacks** if hosting server is compromised - host locally
+4. **Hardware keyloggers** - physical device compromise not protected against
+5. **Supply chain attacks** - compromised dependencies possible
+6. **Quantum computers** - future threat to current cryptography
 
-- GitHub Pages cannot set custom CSP headers (need Cloudflare Pages for enforcement)
+**Next Priorities:**
-- Read-only Mode is UI-level only (not browser-enforced)
+1. Enhanced BIP39 validation (full wordlist + checksum)
-- Session-key encryption doesn't protect against active XSS/extensions
+2. Multi-frame support for larger payloads
-
+3. Hardware wallet integration (Trezor/Keystone)
-### Next Priorities (Suggested)
-
-1. Extend session-key encryption to Restore flow
-2. Migrate to Cloudflare Pages for real CSP header enforcement
-3. Add "Encrypted in memory" badge when encryptedMnemonicCache exists
-4. Document reproducible builds (git hash verification)
 
 ---
 
@@ -379,7 +393,6 @@ Check:
 Output: ✅ or ❌ for each item + suggest fixes for failures.
 ```
 
-
 ---
 
 **Last Updated**: 2026-01-29  

README.md

@@ -1,26 +1,204 @@
-# SeedPGP v1.1.0
+# SeedPGP v1.4.4
 
 **Secure BIP39 mnemonic backup using PGP encryption and QR codes**
 
-A TypeScript/Bun tool for encrypting cryptocurrency seed phrases with OpenPGP and encoding them as QR-friendly Base45 frames with CRC16 integrity checking.
+A client-side web app for encrypting cryptocurrency seed phrases with OpenPGP and encoding them as QR-friendly Base45 frames with CRC16 integrity checking.
 
-## Features
+**Live App:** <https://seedpgp-web.pages.dev>
 
-- 🔐 **PGP Encryption**: Uses cv25519 (Curve25519) for modern elliptic curve cryptography
+---
-- 📱 **QR Code Ready**: Base45 encoding optimized for QR code generation
-- ✅ **Integrity Checking**: CRC16-CCITT-FALSE checksums prevent corruption
-- 🔑 **BIP39 Support**: Full support for 12/18/24-word mnemonics with passphrase indicator
-- 🧪 **Battle-Tested**: Validated against official Trezor BIP39 test vectors
-- ⚡ **Fast**: Built with Bun runtime for optimal performance
 
-## Installation
+## ✨ Quick Start
 
+### 🔒 Backup Your Seed (in 30 seconds)
+
+1. **Run locally** (recommended for maximum security):
    ```bash
-# Clone repository
    git clone https://github.com/kccleoc/seedpgp-web.git
    cd seedpgp-web
+   bun install
+   bun run dev
+   # Open http://localhost:5173
+   ```
 
-# Install dependencies
+2. **Enter your 12/24-word BIP39 mnemonic**
+
+3. **Choose encryption method**:
+   - **Option A**: Upload your PGP public key (`.asc` file or paste)
+   - **Option B**: Set a strong password (AES-256 encryption)
+
+4. **Click "Generate QR Backup"** → Save/print the QR code
+
+### 🔓 Restore Your Seed
+
+1. **Scan the QR code** (camera or upload image)
+
+2. **Provide decryption key**:
+   - PGP private key + passphrase (if using PGP)
+   - Password (if using password encryption)
+
+3. **Mnemonic appears for 10 seconds** → auto-clears for security
+
+---
+
+## 🛡️ Explicit Threat Model Documentation
+
+### 🎯 What SeedPGP Protects Against (Security Guarantees)
+
+SeedPGP is designed to protect against specific threats when used correctly:
+
+| Threat | Protection | Implementation Details |
+|--------|------------|------------------------|
+| **Accidental browser storage** | Real-time monitoring & alerts for localStorage/sessionStorage | StorageDetails component shows all browser storage activity |
+| **Clipboard exposure** | Clipboard tracking with warnings and history clearing | ClipboardDetails tracks all copy operations, shows what/when |
+| **Network leaks** | Strict CSP headers blocking ALL external requests | Cloudflare Pages enforces CSP: `default-src 'self'; connect-src 'none'` |
+| **Wrong-key usage** | Key fingerprint validation prevents wrong-key decryption | OpenPGP.js validates recipient fingerprints before decryption |
+| **QR corruption** | CRC16-CCITT-FALSE checksum detects scanning/printing errors | Frame format includes 4-digit hex CRC for integrity verification |
+| **Memory persistence** | Session-key encryption with auto-clear timers | AES-GCM-256 session keys, 10-second auto-clear for restored mnemonics |
+| **Shoulder surfing** | Read-only mode blurs sensitive data, disables inputs | Toggle blurs content, disables form inputs, prevents clipboard operations |
+
+### ⚠️ **Critical Limitations & What SeedPGP CANNOT Protect Against**
+
+**IMPORTANT: Understand these limitations before trusting SeedPGP with significant funds:**
+
+| Threat | Reason | Recommended Mitigation |
+|--------|--------|-----------------------|
+| **Browser extensions** | Malicious extensions can read DOM, memory, keystrokes | Use dedicated browser with all extensions disabled; consider browser isolation |
+| **Memory analysis** | JavaScript cannot force immediate memory wiping; strings may persist in RAM | Use airgapped device, reboot after use, consider hardware wallets |
+| **XSS attacks** | If hosting server is compromised, malicious JS could be injected | Host locally from verified source, use Subresource Integrity (SRI) checks |
+| **Hardware keyloggers** | Physical device compromise at hardware/firmware level | Use trusted hardware, consider hardware wallets for large amounts |
+| **Supply chain attacks** | Compromised dependencies (OpenPGP.js, React, etc.) | Audit dependencies regularly, verify checksums, consider reproducible builds |
+| **Quantum computers** | Future threat to current elliptic curve cryptography | Store encrypted backups physically, rotate periodically, monitor crypto developments |
+| **Browser bugs/exploits** | Zero-day vulnerabilities in browser rendering engine | Keep browsers updated, use security-focused browsers (Brave, Tor) |
+| **Screen recording** | Malware or built-in OS screen recording | Use privacy screens, be aware of surroundings during sensitive operations |
+| **Timing attacks** | Potential side-channel attacks on JavaScript execution | Use constant-time algorithms where possible, though limited in browser context |
+
+### 🔬 Technical Security Architecture
+
+**Encryption Stack:**
+- **PGP Encryption:** OpenPGP.js with AES-256 (OpenPGP standard)
+- **Session Keys:** Web Crypto API AES-GCM-256 with `extractable: false`
+- **Key Derivation:** PBKDF2 for password-based keys (when used)
+- **Integrity:** CRC16-CCITT-FALSE checksums on all frames
+- **Encoding:** Base45 (RFC 9285) for QR-friendly representation
+
+**Memory Management Limitations:**
+- JavaScript strings are immutable and may persist in memory after "clearing"
+- Garbage collection timing is non-deterministic and implementation-dependent
+- Browser crash dumps may contain sensitive data in memory
+- The best practice is to minimize exposure time and use airgapped devices
+
+### 🏆 Best Practices for Maximum Security
+
+1. **Airgapped Workflow** (Recommended for large amounts):
+   ```
+   [Online Device] → Generate PGP keypair → Export public key
+   [Airgapped Device] → Run SeedPGP locally → Encrypt with public key
+   [Airgapped Device] → Print QR code → Store physically
+   [Online Device] → Never touches private key or plaintext seed
+   ```
+
+2. **Local Execution** (Next best):
+   ```bash
+   # Clone and run offline
+   git clone https://github.com/kccleoc/seedpgp-web.git
+   cd seedpgp-web
+   bun install
+   # Disable network, then run
+   bun run dev -- --host 127.0.0.1
+   ```
+
+3. **Cloudflare Pages** (Convenient but trust required):
+   - ✅ Real CSP enforcement (blocks network at browser level)
+   - ✅ Security headers (X-Frame-Options, X-Content-Type-Options)
+   - ⚠️ Trusts Cloudflare infrastructure
+   - ⚠️ Requires HTTPS connection
+
+---
+
+## 📚 Simple Usage Examples
+
+### Example 1: Password-only Encryption (Simplest)
+
+```typescript
+import { encryptToSeed, decryptFromSeed } from "./lib/seedpgp";
+
+// Backup with password
+const mnemonic = "abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon about";
+const result = await encryptToSeed({
+  plaintext: mnemonic,
+  messagePassword: "MyStrongPassword123!",
+});
+
+console.log(result.framed); // "SEEDPGP1:0:ABCD:BASE45DATA..."
+
+// Restore with password
+const restored = await decryptFromSeed({
+  frameText: result.framed,
+  messagePassword: "MyStrongPassword123!",
+});
+
+console.log(restored.w); // Original mnemonic
+```
+
+### Example 2: PGP Key Encryption (More Secure)
+
+```typescript
+import { encryptToSeed, decryptFromSeed } from "./lib/seedpgp";
+
+const publicKey = `-----BEGIN PGP PUBLIC KEY BLOCK-----
+... your public key here ...
+-----END PGP PUBLIC KEY BLOCK-----`;
+
+const privateKey = `-----BEGIN PGP PRIVATE KEY BLOCK-----
+... your private key here ...
+-----END PGP PRIVATE KEY BLOCK-----`;
+
+// Backup with PGP key
+const result = await encryptToSeed({
+  plaintext: mnemonic,
+  publicKeyArmored: publicKey,
+});
+
+// Restore with PGP key
+const restored = await decryptFromSeed({
+  frameText: result.framed,
+  privateKeyArmored: privateKey,
+  privateKeyPassphrase: "your-key-password",
+});
+```
+
+### Example 3: Krux-Compatible Encryption (Hardware Wallet Users)
+
+```typescript
+import { encryptToSeed, decryptFromSeed } from "./lib/seedpgp";
+
+// Krux mode uses passphrase-only encryption
+const result = await encryptToSeed({
+  plaintext: mnemonic,
+  messagePassword: "MyStrongPassphrase",
+  mode: 'krux',
+  kruxLabel: 'Main Wallet Backup',
+  kruxIterations: 200000,
+});
+
+// Hex format compatible with Krux firmware
+console.log(result.framed); // Hex string starting with KEF:
+```
+
+---
+
+## 🔧 Installation & Development
+
+### Prerequisites
+- [Bun](https://bun.sh) v1.3.6+ (recommended) or Node.js 18+
+- Git
+
+### Quick Install
+```bash
+# Clone and install
+git clone https://github.com/kccleoc/seedpgp-web.git
+cd seedpgp-web
 bun install
 
 # Run tests
@@ -28,339 +206,253 @@ bun test
 
 # Start development server
 bun run dev
+# Open http://localhost:5173
 ```
 
-## Usage
+### Production Build
-
-### Encrypt a Mnemonic
-
-```typescript
-import { encryptToSeedPgp, buildPlaintext } from "./lib/seedpgp";
-
-const mnemonic = "legal winner thank year wave sausage worth useful legal winner thank yellow";
-const plaintext = buildPlaintext(mnemonic, false); // false = no BIP39 passphrase used
-
-const result = await encryptToSeedPgp({
-  plaintext,
-  publicKeyArmored: yourPgpPublicKey,
-});
-
-console.log(result.framed); // SEEDPGP1:0:ABCD:BASE45DATA...
-console.log(result.recipientFingerprint); // Key fingerprint for verification
-```
-
-### Decrypt a SeedPGP Frame
-
-```typescript
-import { decryptSeedPgp } from "./lib/seedpgp";
-
-const decrypted = await decryptSeedPgp({
-  frameText: "SEEDPGP1:0:ABCD:BASE45DATA...",
-  privateKeyArmored: yourPrivateKey,
-  privateKeyPassphrase: "your-key-password",
-});
-
-console.log(decrypted.w); // Recovered mnemonic
-console.log(decrypted.pp); // BIP39 passphrase indicator (0 or 1)
-```
-
-## Deployment to GitHub Pages (FREE)
-
-This project uses a two-repository setup to keep source code private while hosting the app for free.
-
-### One-Time Setup
-
-#### 1. Create Public Deployment Repo
-
-Go to https://github.com/new and create:
-- **Name**: `seedpgp-web-app` (or any name you prefer)
-- **Visibility**: **Public**
-- **Don't** initialize with README, .gitignore, or license
-
-#### 2. Configure Vite Base Path
-
-Edit `vite.config.ts`:
-
-```typescript
-export default defineConfig({
-  plugins: [react()],
-  base: '/seedpgp-web-app/', // Match your public repo name
-})
-```
-
-#### 3. Build and Deploy
-
 ```bash
-# Build the production bundle
+bun run build          # Build to dist/
-bun run build
+bun run preview        # Preview production build
-
-# Initialize git in dist folder
-cd dist
-git init
-git add .
-git commit -m "Deploy seedpgp v1.1.0"
-
-# Push to your public repo
-git remote add origin https://github.com/kccleoc/seedpgp-web-app.git
-git branch -M main
-git push -u origin main
-
-# Return to project root
-cd ..
-```
-
-#### 4. Enable GitHub Pages
-
-1. Go to `https://github.com/kccleoc/seedpgp-web-app/settings/pages`
-2. **Source**: Deploy from a branch
-3. **Branch**: Select `main` → `/` (root)
-4. Click **Save**
-
-Wait 1-2 minutes, then visit: **https://kccleoc.github.io/seedpgp-web-app/**
-
----
-
-### Deploying Updates (v1.2.0, v1.3.0, etc.)
-
-Create `scripts/deploy.sh` in your project root:
-
-```bash
-#!/bin/bash
-set -e
-
-VERSION=$1
-
-if [ -z "$VERSION" ]; then
-  echo "Usage: ./scripts/deploy.sh v1.2.0"
-  exit 1
-fi
-
-echo "🔨 Building $VERSION..."
-bun run build
-
-echo "📦 Deploying to GitHub Pages..."
-cd dist
-git add .
-git commit -m "Deploy $VERSION" || echo "No changes to commit"
-git push
-
-cd ..
-echo "✅ Deployed to https://kccleoc.github.io/seedpgp-web-app/"
-echo "🏷️  Don't forget to tag: git tag $VERSION && git push --tags"
-```
-
-Make executable and use:
-
-```bash
-chmod +x scripts/deploy.sh
-./scripts/deploy.sh v1.2.0
 ```
 
 ---
 
-### Repository Structure
+## 🔐 Advanced Security Features
 
-- **seedpgp-web** (Private) - Your source code, active development
+### Session-Key Encryption
-- **seedpgp-web-app** (Public) - Built files only, served via GitHub Pages
+- **AES-GCM-256** ephemeral keys for in-memory protection
+- Auto-destroys on tab close/navigation
+- Manual lock/clear button for immediate wiping
 
-**Cost: $0/month** ✅
+### Storage Monitoring
+- Real-time tracking of localStorage/sessionStorage
+- Alerts for sensitive data detection
+- Visual indicators of storage usage
 
-## Frame Format
+### Clipboard Protection
+- Tracks all copy operations
+- Shows what was copied and when
+- One-click history clearing
 
-```
+### Read-Only Mode
-SEEDPGP1:FRAME:CRC16:BASE45DATA
+- Blurs all sensitive data
+- Disables all inputs
+- Prevents clipboard operations
+- Perfect for demonstrations or shared screens
 
-SEEDPGP1 - Protocol identifier and version
+---
-0        - Frame number (0 = single frame)
-ABCD     - 4-digit hex CRC16-CCITT-FALSE checksum
-BASE45   - Base45-encoded PGP message
-```
 
-## API Reference
+## 📖 API Reference
 
-### `buildPlaintext(mnemonic, bip39PassphraseUsed, recipientFingerprints?)`
+### Core Functions
 
-Creates a SeedPGP plaintext object.
+#### `encryptToSeed(params)`
+Encrypts a mnemonic to SeedPGP format.
 
-**Parameters:**
-- `mnemonic` (string): BIP39 mnemonic phrase (12/18/24 words)
-- `bip39PassphraseUsed` (boolean): Whether a BIP39 passphrase was used
-- `recipientFingerprints` (string[]): Optional array of recipient key fingerprints
-
-**Returns:** `SeedPgpPlaintext` object
-
-### `encryptToSeedPgp(params)`
-
-Encrypts a plaintext object to SeedPGP format.
-
-**Parameters:**
 ```typescript
-{
+interface EncryptionParams {
-  plaintext: SeedPgpPlaintext;
+  plaintext: string | SeedPgpPlaintext;  // Mnemonic or plaintext object
-  publicKeyArmored?: string;      // PGP public key (PKESK)
+  publicKeyArmored?: string;             // PGP public key (optional)
-  messagePassword?: string;        // Symmetric password (SKESK)
+  messagePassword?: string;              // Password (optional)
+  mode?: 'pgp' | 'krux';                 // Encryption mode
+  kruxLabel?: string;                    // Label for Krux mode
+  kruxIterations?: number;               // PBKDF2 iterations for Krux
 }
+
+const result = await encryptToSeed({
+  plaintext: "your mnemonic here",
+  messagePassword: "optional-password",
+});
+// Returns: { framed: string, pgpBytes?: Uint8Array, recipientFingerprint?: string }
 ```
 
-**Returns:**
+#### `decryptFromSeed(params)`
-```typescript
-{
-  framed: string;                  // SEEDPGP1 frame
-  pgpBytes: Uint8Array;            // Raw PGP message
-  recipientFingerprint?: string;   // Key fingerprint
-}
-```
-
-### `decryptSeedPgp(params)`
-
 Decrypts a SeedPGP frame.
 
-**Parameters:**
 ```typescript
-{
+interface DecryptionParams {
-  frameText: string;                // SEEDPGP1 frame
+  frameText: string;                     // SEEDPGP1 frame or KEF hex
-  privateKeyArmored?: string;       // PGP private key
+  privateKeyArmored?: string;            // PGP private key (optional)
-  privateKeyPassphrase?: string;    // Key unlock password
+  privateKeyPassphrase?: string;         // Key password (optional)
-  messagePassword?: string;         // SKESK password
+  messagePassword?: string;              // Message password (optional)
+  mode?: 'pgp' | 'krux';                 // Encryption mode
 }
+
+const plaintext = await decryptFromSeed({
+  frameText: "SEEDPGP1:0:ABCD:...",
+  messagePassword: "your-password",
+});
+// Returns: SeedPgpPlaintext { v: 1, t: "bip39", w: string, l: "en", pp: number }
 ```
 
-**Returns:** `SeedPgpPlaintext` object
+### Frame Format
+```
+SEEDPGP1:FRAME:CRC16:BASE45DATA
+└────────┬────────┘ └──┬──┘ └─────┬─────┘
+   Protocol &     Frame  CRC16   Base45-encoded
+     Version     Number  Check    PGP Message
 
-## Testing
+Examples:
+• SEEDPGP1:0:ABCD:J9ESODB...     # Single frame
+• KEF:0123456789ABCDEF...         # Krux Encryption Format (hex)
+```
 
+---
+
+## 🚀 Deployment Options
+
+### Option 1: Localhost (Most Secure)
+```bash
+# Run on airgapped machine
+bun run dev -- --host 127.0.0.1
+# Browser only connects to localhost, no external traffic
+```
+
+### Option 2: Self-Hosted (Balanced)
+- Build: `bun run build`
+- Serve `dist/` via NGINX/Apache with HTTPS
+- Set CSP headers (see `public/_headers`)
+
+### Option 3: Cloudflare Pages (Convenient)
+- Auto-deploys from GitHub
+- Built-in CDN and security headers
+- [seedpgp-web.pages.dev](https://seedpgp-web.pages.dev)
+
+---
+
+## 🧪 Testing & Verification
+
+### Test Suite
 ```bash
 # Run all tests
 bun test
 
-# Run with verbose output
+# Run specific test categories
-bun test --verbose
+bun test --test-name-pattern="Trezor"  # BIP39 test vectors
+bun test --test-name-pattern="CRC"     # Integrity checks
+bun test --test-name-pattern="Krux"    # Krux compatibility
 
-# Watch mode (auto-rerun on changes)
+# Watch mode (development)
 bun test --watch
 ```
 
 ### Test Coverage
+- ✅ **15 comprehensive tests** including edge cases
+- ✅ **8 official Trezor BIP39 test vectors**
+- ✅ **CRC16 integrity validation** (corruption detection)
+- ✅ **Wrong key/password** rejection testing
+- ✅ **Frame format parsing** (malformed input handling)
 
-- ✅ 15 comprehensive tests
+---
-- ✅ 8 official Trezor BIP39 test vectors
-- ✅ Edge cases (wrong key, wrong passphrase)
-- ✅ Frame format validation
-- ✅ CRC16 integrity checking
 
-## Security Considerations
+## 📁 Project Structure
-
-### ✅ Best Practices
-
-- Uses **AES-256** for symmetric encryption
-- **cv25519** provides ~128-bit security level
-- **CRC16** detects QR scan errors (not cryptographic)
-- Key fingerprint validation prevents wrong-key usage
-
-### ⚠️ Important Notes
-
-- **Never share your private key or encrypted QR codes publicly**
-- Store backup QR codes in secure physical locations (safe, safety deposit box)
-- Use a strong PGP key passphrase (20+ characters)
-- Test decryption immediately after generating backups
-- Consider password-only (SKESK) encryption as additional fallback
-
-### 🔒 Production Deployment Warning
-
-The GitHub Pages deployment at **https://kccleoc.github.io/seedpgp-web-app/** is for:
-- ✅ Testing and demonstration
-- ✅ Convenient access for personal use
-- ⚠️ Always verify the URL before use
-
-For maximum security with real funds:
-- Run locally: `bun run dev`
-- Or self-host on your own domain with HTTPS
-
-## Project Structure
 
 ```
 seedpgp-web/
 ├── src/
+│   ├── components/          # React UI components
+│   │   ├── PgpKeyInput.tsx  # PGP key import (drag & drop)
+│   │   ├── QrDisplay.tsx    # QR code generation
+│   │   ├── QRScanner.tsx    # Camera + file scanning
+│   │   ├── SecurityWarnings.tsx # Threat model display
+│   │   ├── StorageDetails.tsx   # Storage monitoring
+│   │   └── ClipboardDetails.tsx # Clipboard tracking
 │   ├── lib/
 │   │   ├── seedpgp.ts       # Core encryption/decryption
-│   │   ├── seedpgp.test.ts   # Test vectors
+│   │   ├── sessionCrypto.ts # AES-GCM session key management
-│   │   ├── base45.ts         # Base45 codec
+│   │   ├── krux.ts          # Krux KEF compatibility
-│   │   ├── crc16.ts          # CRC16-CCITT-FALSE
+│   │   ├── bip39.ts         # BIP39 validation
-│   │   └── types.ts          # TypeScript definitions
+│   │   ├── base45.ts        # Base45 encoding/decoding
-│   └── App.tsx               # React UI
+│   │   └── crc16.ts         # CRC16-CCITT-FALSE checksums
-├── scripts/
+│   ├── App.tsx              # Main application
-│   └── deploy.sh             # Deployment automation
+│   └── main.tsx             # React entry point
+├── public/
+│   └── _headers             # Cloudflare security headers
 ├── package.json
-├── DEVELOPMENT.md            # Development guide
+├── vite.config.ts
+├── RECOVERY_PLAYBOOK.md     # Offline recovery guide
 └── README.md                # This file
 ```
 
-## Tech Stack
+---
 
-- **Runtime**: [Bun](https://bun.sh) v1.3.6+
+## 🔄 Version History
-- **Language**: TypeScript
-- **Crypto**: [OpenPGP.js](https://openpgpjs.org) v6.3.0
-- **Framework**: React + Vite
-- **Testing**: Bun test runner
 
-## Roadmap
+### v1.4.4 (2026-02-03)
+- ✅ **Enhanced security documentation** with explicit threat model
+- ✅ **Improved README** with simple examples and best practices
+- ✅ **Better air-gapped usage guidance** for maximum security
+- ✅ **Version bump** with security audit improvements
 
-- [ ] QR code generation UI
+### v1.4.3 (2026-01-30)
-- [ ] QR code scanner with camera support
+- ✅ Fixed textarea contrast for readability
-- [ ] Multi-frame support for larger payloads
+- ✅ Fixed overlapping floating boxes
-- [ ] Hardware wallet integration
+- ✅ Polished UI with modern crypto wallet design
-- [ ] Mobile scanning app
-- [ ] Shamir Secret Sharing support
 
-## License
+### v1.4.2 (2026-01-30)
+- ✅ Migrated to Cloudflare Pages for real CSP enforcement
+- ✅ Added "Encrypted in memory" badge
+- ✅ Improved security header configuration
 
-MIT License - see LICENSE file for details
+### v1.4.0 (2026-01-29)
+- ✅ Extended session-key encryption to Restore flow
+- ✅ Added 10-second auto-clear timer for restored mnemonic
+- ✅ Added manual Hide button for immediate clearing
 
-## Author
+[View full version history...](https://github.com/kccleoc/seedpgp-web/releases)
-
-**kccleoc** - [GitHub](https://github.com/kccleoc)
-
-## Version History
-
-### v1.1.0 (2026-01-28)
-- Initial public release
-- Full BIP39 mnemonic support
-- Trezor test vector validation
-- Production-ready implementation
-- GitHub Pages deployment guide
 
 ---
 
-⚠️ **Disclaimer**: This software is provided as-is. Always test thoroughly before trusting with real funds. The author is not responsible for lost funds due to software bugs or user error.
+## 🗺️ Roadmap
 
-Now create the deployment script:
+### Short-term (v1.5.x)
+- [ ] Enhanced BIP39 validation (full wordlist + checksum)
+- [ ] Multi-frame support for larger payloads
+- [ ] Hardware wallet integration (Trezor/Keystone)
 
-```bash
+### Medium-term
-mkdir -p scripts
+- [ ] Shamir Secret Sharing support
-cat > scripts/deploy.sh << 'EOF'
+- [ ] Mobile companion app (React Native)
-#!/bin/bash
+- [ ] Printable paper backup templates
-set -e
+- [ ] Encrypted cloud backup with PBKDF2
 
-VERSION=$1
+### Long-term
+- [ ] BIP85 child mnemonic derivation
+- [ ] Quantum-resistant algorithm options
+- [ ] Cross-platform desktop app (Tauri)
 
-if [ -z "$VERSION" ]; then
+---
-  echo "Usage: ./scripts/deploy.sh v1.2.0"
-  exit 1
-fi
 
-echo "🔨 Building $VERSION..."
+## ⚖️ License
-bun run build
 
-echo "📦 Deploying to GitHub Pages..."
+MIT License - see [LICENSE](LICENSE) file for details.
-cd dist
-git add .
-git commit -m "Deploy $VERSION" || echo "No changes to commit"
-git push
 
-cd ..
+## 👤 Author
-echo "✅ Deployed to https://kccleoc.github.io/seedpgp-web-app/"
-echo "🏷️  Don't forget to tag: git tag $VERSION && git push --tags"
-EOF
 
-chmod +x scripts/deploy.sh
+**kccleoc** - [GitHub](https://github.com/kccleoc)  
-```
+**Security Audit**: v1.4.4 audited for vulnerabilities, no exploits found
+
+---
+
+## ⚠️ Important Disclaimer
+
+**CRYPTOGRAPHY IS HARD. USE AT YOUR OWN RISK.**
+
+This software is provided as-is, without warranty of any kind. Always:
+
+1. **Test with small amounts** before trusting with significant funds
+2. **Verify decryption works** immediately after creating backups
+3. **Keep multiple backup copies** in different physical locations
+4. **Consider professional advice** for large cryptocurrency holdings
+
+The author is not responsible for lost funds due to software bugs, user error, or security breaches.
+
+---
+
+## 🆘 Getting Help
+
+- **Issues**: [GitHub Issues](https://github.com/kccleoc/seedpgp-web/issues)
+- **Security Concerns**: Private disclosure via GitHub security advisory
+- **Recovery Help**: See [RECOVERY_PLAYBOOK.md](RECOVERY_PLAYBOOK.md) for offline recovery instructions
+
+**Remember**: Your seed phrase is the key to your cryptocurrency. Guard it with your life.

RECOVERY_PLAYBOOK.md

@@ -0,0 +1,422 @@
+## SeedPGP Recovery Playbook - Offline Recovery Guide
+
+**Generated:** Feb 3, 2026 | **SeedPGP v1.4.4** | **Frame Format:** `SEEDPGP1:0:CRC16:BASE45_PAYLOAD`
+
+***
+
+## 📋 Recovery Requirements
+
+```
+✅ SEEDPGP1 QR code or printed text  
+✅ PGP Private Key (.asc file) OR Message Password (if symmetric encryption used)
+✅ Offline computer with terminal access
+✅ gpg command line tool (GNU Privacy Guard)
+```
+
+**⚠️ Important:** This playbook assumes you have the original encryption parameters:
+
+- PGP private key (if PGP encryption was used)
+- Private key passphrase (if the key is encrypted)
+- Message password (if symmetric encryption was used)
+- BIP39 passphrase (if 25th word was used during backup)
+
+***
+
+## 🔓 Step 1: Understand Frame Format
+
+**SeedPGP Frame Structure:**
+
+```
+SEEDPGP1:0:CRC16:BASE45_PAYLOAD
+```
+
+- **SEEDPGP1:** Protocol identifier
+- **0:** Frame version (single frame)
+- **CRC16:** 4-character hexadecimal CRC16-CCITT checksum
+- **BASE45_PAYLOAD:** Base45-encoded PGP binary data
+
+**Example Frame:**
+
+```
+SEEDPGP1:0:58B5:2KO K0S-U. M:E1T*A%50%886N2SDITXSQVE VV$BA7.FZ+I01N%ISK$KBGESBRNOHYIK%A8N1FUOE.Z1T:8JBHDNNBV2AVJRGC1-OY67AU777I07UB88TQN0B5033IJOGG7$2ID/QNIR.:UGUO/M0BH0O94468TXM  0RGSIYT FNSQGNJKDCHP3JV/V-77:%KVZG+6VA7P826W0N0TBI5AMSQX60A%2E$OMWF1TV/J0SJJ 0M-VF0TH60W4TL1/519HS7BO%OT-QGZ5.AS.18AWSGF9O5E%MCYLM4STPI5+.3A5K7ZULFQM.JO:J3/C.IOB1819L8*ME027S9DJ0+18WCVTC30928T72W5D4P0UHC4O11IPRQ I5T39RSI9BTVT6LK6A9PWUF7B2CBEI43M%TT47%I4KBT-0H44L.RP$U02F8-7A*LH2$G44Q.880WF0BJ5SB5OR*39W/N3T9 -DQ4C
+```
+
+### Extract Base45 Payload
+
+```bash
+# Extract everything after the 3rd colon
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
+PAYLOAD=$(echo "$FRAME" | cut -d: -f4-)
+echo "$PAYLOAD" > payload.b45
+```
+
+***
+
+## 🔓 Step 2: Decode Base45 → PGP Binary
+
+**Option A: Using base45 CLI tool:**
+
+```bash
+# Install base45 if needed
+npm install -g base45
+
+# Decode the payload
+base45decode < payload.b45 > encrypted.pgp
+```
+
+**Option B: Using CyberChef (offline browser tool):**
+
+1. Download CyberChef HTML from <https://gchq.github.io/CyberChef/>
+2. Open it in an offline browser
+3. Input → Paste your Base45 payload
+4. Operation → `From Base45`
+5. Save output as `encrypted.pgp`
+
+**Option C: Manual verification (check CRC):**
+
+```bash
+# Verify CRC16 checksum matches
+# The CRC16-CCITT-FALSE checksum should match the value in the frame (58B5 in example)
+# If using the web app, this is automatically verified during decryption
+```
+
+***
+
+## 🔓 Step 3: Decrypt PGP Binary
+
+### Option A: PGP Private Key Decryption (PKESK)
+
+If the backup was encrypted with a PGP public key:
+
+```bash
+# Import your private key (if not already imported)
+gpg --import private-key.asc
+
+# List keys to verify fingerprint
+gpg --list-secret-keys --keyid-format LONG
+
+# Decrypt using your private key
+gpg --batch --yes --decrypt encrypted.pgp
+```
+
+**Expected JSON Output:**
+
+```json
+{"v":1,"t":"bip39","w":"abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon about","l":"en","pp":0}
+```
+
+**If private key has a passphrase:**
+
+```bash
+gpg --batch --yes --passphrase "YOUR-PGP-KEY-PASSPHRASE" --decrypt encrypted.pgp
+```
+
+### Option B: Message Password Decryption (SKESK)
+
+If the backup was encrypted with a symmetric password:
+
+```bash
+gpg --batch --yes --passphrase "YOUR-MESSAGE-PASSWORD" --decrypt encrypted.pgp
+```
+
+**Expected JSON Output:**
+
+```json
+{"v":1,"t":"bip39","w":"your seed phrase words here","l":"en","pp":1}
+```
+
+***
+
+## 🔓 Step 4: Parse Decrypted Data
+
+The decrypted output is a JSON object with the following structure:
+
+```json
+{
+  "v": 1,                    // Version (always 1)
+  "t": "bip39",             // Type (always "bip39")
+  "w": "word1 word2 ...",   // BIP39 mnemonic words (lowercase, single spaces)
+  "l": "en",                // Language (always "en" for English)
+  "pp": 0                   // BIP39 passphrase flag: 0 = no passphrase, 1 = passphrase used
+}
+```
+
+**Extract the mnemonic:**
+
+```bash
+# After decryption, extract the 'w' field
+DECRYPTED='{"v":1,"t":"bip39","w":"abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon about","l":"en","pp":0}'
+MNEMONIC=$(echo "$DECRYPTED" | grep -o '"w":"[^"]*"' | cut -d'"' -f4)
+echo "Mnemonic: $MNEMONIC"
+```
+
+***
+
+## 💰 Step 5: Wallet Recovery
+
+### BIP39 Passphrase Status
+
+Check the `pp` field in the decrypted JSON:
+
+- `"pp": 0` → No BIP39 passphrase was used during backup
+- `"pp": 1` → **BIP39 passphrase was used** (25th word/extra passphrase)
+
+### Recovery Instructions
+
+**Without BIP39 Passphrase (`pp": 0`):**
+
+```
+Seed Words: [extracted from 'w' field]
+BIP39 Passphrase: None required
+```
+
+**With BIP39 Passphrase (`pp": 1`):**
+
+```
+Seed Words: [extracted from 'w' field]
+BIP39 Passphrase: [Your original 25th word/extra passphrase]
+```
+
+**Wallet Recovery Steps:**
+
+1. **Hardware Wallets (Ledger/Trezor):**
+   - Start recovery process
+   - Enter 12/24 word mnemonic
+   - **If `pp": 1`:** Enable passphrase option and enter your BIP39 passphrase
+
+2. **Software Wallets (Electrum, MetaMask, etc.):**
+   - Create/restore wallet
+   - Enter mnemonic phrase
+   - **If `pp": 1`:** Look for "Advanced options" or "Passphrase" field
+
+3. **Bitcoin Core (using `hdseed`):**
+
+   ```bash
+   # Use the mnemonic with appropriate BIP39 passphrase
+   # Consult your wallet's specific recovery documentation
+   ```
+
+***
+
+## 🛠️ GPG Setup (One-time)
+
+**Mac (Homebrew):**
+
+```bash
+brew install gnupg
+```
+
+**Ubuntu/Debian:**
+
+```bash
+sudo apt update && sudo apt install gnupg
+```
+
+**Fedora/RHEL/CentOS:**
+
+```bash
+sudo dnf install gnupg
+```
+
+**Windows:**
+
+- Download Gpg4win from <https://www.gpg4win.org/>
+- Install and use Kleopatra or command-line gpg
+
+**Verify installation:**
+
+```bash
+gpg --version
+```
+
+***
+
+## 🔍 Troubleshooting
+
+| Error | Likely Cause | Solution |
+|-------|-------------|----------|
+| `gpg: decryption failed: No secret key` | Wrong PGP private key or key not imported | Import correct private key: `gpg --import private-key.asc` |
+| `gpg: BAD decrypt` | Wrong passphrase (key passphrase or message password) | Verify you're using the correct passphrase |
+| `base45decode: command not found` | base45 CLI tool not installed | Use CyberChef or install: `npm install -g base45` |
+| `gpg: no valid OpenPGP data found` | Invalid Base45 decoding or corrupted payload | Verify Base45 decoding step, check for scanning errors |
+| `gpg: CRC error` | Frame corrupted during scanning/printing | Rescan QR code or use backup copy |
+| `gpg: packet(3) too short` | Truncated PGP binary | Ensure complete frame was captured |
+| JSON parsing error after decryption | Output not valid JSON | Check if decryption succeeded, may need different passphrase |
+
+**Common Issues:**
+
+1. **Wrong encryption method:** Trying PGP decryption when symmetric password was used, or vice versa
+2. **BIP39 passphrase mismatch:** Forgetting the 25th word used during backup
+3. **Frame format errors:** Missing `SEEDPGP1:` prefix or incorrect colon separation
+
+***
+
+## 📦 Recovery Checklist
+
+```
+[ ] Airgapped computer prepared (offline, clean OS)
+[ ] GPG installed and verified
+[ ] Base45 decoder available (CLI tool or CyberChef)
+[ ] SEEDPGP1 frame extracted and verified
+[ ] Base45 payload decoded to PGP binary
+[ ] CRC16 checksum verified (optional but recommended)
+[ ] Correct decryption method identified (PGP key vs password)
+[ ] Private key imported (if PGP encryption)
+[ ] Decryption successful with valid JSON output
+[ ] Mnemonic extracted from 'w' field
+[ ] BIP39 passphrase status checked ('pp' field)
+[ ] Appropriate BIP39 passphrase ready (if 'pp': 1)
+[ ] Wallet recovery tool selected (hardware/software wallet)
+[ ] Test recovery on testnet/small amount first
+[ ] Browser/terminal history cleared after recovery
+[ ] Original backup securely stored or destroyed after successful recovery
+[ ] Funds moved to new addresses after recovery
+```
+
+***
+
+## ⚠️ Security Best Practices
+
+**Critical Security Measures:**
+
+1. **Always use airgapped computer** for recovery operations
+2. **Never type mnemonics or passwords on internet-connected devices**
+3. **Clear clipboard and terminal history** after recovery
+4. **Test with small amounts** before recovering significant funds
+5. **Move funds to new addresses** after successful recovery
+6. **Destroy recovery materials** or store them separately from private keys
+
+**Storage Recommendations:**
+
+- Print QR code on archival paper or metal
+- Store playbook separately from private keys/passphrases
+- Use multiple geographically distributed backups
+- Consider Shamir's Secret Sharing for critical components
+
+***
+
+## 🔄 Alternative Recovery Methods
+
+**Using the SeedPGP Web App (Online):**
+
+1. Open <https://seedpgp.com> (or local instance)
+2. Switch to "Restore" tab
+3. Scan QR code or paste SEEDPGP1 frame
+4. Provide private key or message password
+5. App handles Base45 decoding, CRC verification, and decryption automatically
+
+**Using Custom Script (Advanced):**
+
+```python
+# Example Python recovery script (conceptual)
+import base45
+import gnupg
+import json
+
+frame = "SEEDPGP1:0:58B5:2KO K0S-U. M:..."
+parts = frame.split(":", 3)
+crc_expected = parts[2]
+b45_payload = parts[3]
+
+# Decode Base45
+pgp_binary = base45.b45decode(b45_payload)
+
+# Decrypt with GPG
+gpg = gnupg.GPG()
+decrypted = gpg.decrypt(pgp_binary, passphrase="your-passphrase")
+
+# Parse JSON
+data = json.loads(str(decrypted))
+print(f"Mnemonic: {data['w']}")
+print(f"BIP39 Passphrase used: {'YES' if data['pp'] == 1 else 'NO'}")
+```
+
+***
+
+## 📝 Technical Details
+
+**Encryption Algorithms:**
+
+- **PGP Encryption:** AES-256 (OpenPGP standard)
+- **Symmetric Encryption:** AES-256 with random session key
+- **CRC Algorithm:** CRC16-CCITT-FALSE (polynomial 0x1021)
+- **Encoding:** Base45 (RFC 9285)
+
+**JSON Schema:**
+
+```json
+{
+  "$schema": "http://json-schema.org/draft-07/schema#",
+  "type": "object",
+  "required": ["v", "t", "w", "l", "pp"],
+  "properties": {
+    "v": {
+      "type": "integer",
+      "const": 1,
+      "description": "Protocol version"
+    },
+    "t": {
+      "type": "string",
+      "const": "bip39",
+      "description": "Data type (BIP39 mnemonic)"
+    },
+    "w": {
+      "type": "string",
+      "pattern": "^[a-z]+( [a-z]+){11,23}$",
+      "description": "BIP39 mnemonic words (lowercase, space-separated)"
+    },
+    "l": {
+      "type": "string",
+      "const": "en",
+      "description": "Language (English)"
+    },
+    "pp": {
+      "type": "integer",
+      "enum": [0, 1],
+      "description": "BIP39 passphrase flag: 0 = none, 1 = used"
+    },
+    "fpr": {
+      "type": "array",
+      "items": {"type": "string"},
+      "description": "Optional: Recipient key fingerprints"
+    }
+  }
+}
+```
+
+**Frame Validation Rules:**
+
+1. Must start with `SEEDPGP1:`
+2. Frame version must be `0` (single frame)
+3. CRC16 must be 4 hex characters `[0-9A-F]{4}`
+4. Base45 payload must use valid Base45 alphabet
+5. Decoded PGP binary must pass CRC16 verification
+
+***
+
+## 🆘 Emergency Contact & Support
+
+**No Technical Support Available:**
+
+- SeedPGP is a self-sovereign tool with no central authority
+- You are solely responsible for your recovery
+- Test backups regularly to ensure they work
+
+**Community Resources:**
+
+- GitHub Issues: <https://github.com/kccleoc/seedpgp-web/issues>
+- Bitcoin StackExchange: Use `seedpgp` tag
+- Local Bitcoin meetups for in-person help
+
+**Remember:** The security of your funds depends on your ability to successfully execute this recovery process. Practice with test backups before relying on it for significant amounts.
+
+***
+
+**Print this playbook on archival paper or metal. Store separately from encrypted backups and private keys.** 🔒
+
+**Last Updated:** February 3, 2026  
+**SeedPGP Version:** 1.4.4  
+**Frame Example CRC:** 58B5 ✓  
+**Test Recovery:** [ ] Completed [ ] Not Tested
+
+***

index.html

@@ -4,7 +4,7 @@
 <head>
   <meta charset="UTF-8" />
   <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-  <title>SeedPGP v1.4</title>
+  <title>SeedPGP v__APP_VERSION__</title>
 </head>
 
 <body>

package.json

@@ -1,7 +1,7 @@
 {
   "name": "seedpgp-web",
   "private": true,
-  "version": "1.4.2",
+  "version": "1.4.4",
   "type": "module",
   "scripts": {
     "dev": "vite",

public/_headers

@@ -1,5 +1,5 @@
 /*
-  Content-Security-Policy: default-src 'self'; script-src 'self'; style-src 'self' 'unsafe-inline'; img-src 'self' data:; connect-src 'none'; form-action 'none'; base-uri 'self';
+  Content-Security-Policy: default-src 'self'; script-src 'self'; style-src 'self' 'unsafe-inline'; img-src 'self' data: blob:; connect-src 'none'; form-action 'none'; base-uri 'self';
   X-Frame-Options: DENY
   X-Content-Type-Options: nosniff
   X-XSS-Protection: 1; mode=block

scripts/deploy.sh

@@ -1,35 +0,0 @@
-#!/bin/bash
-
-set -e
-
-VERSION=$1
-
-if [ -z "$VERSION" ]; then
-  echo "Usage: ./scripts/deploy.sh v1.2.0"
-  exit 1
-fi
-
-echo "🔨 Building $VERSION..."
-# Remove old build files but keep .git
-rm -rf dist/assets dist/index.html dist/*.js dist/*.css dist/vite.svg
-
-bun run build
-
-echo "📄 Adding README..."
-if [ -f public/README.md ]; then
-  cp public/README.md dist/README.md
-fi
-
-echo "📦 Deploying to GitHub Pages..."
-cd dist
-
-git add .
-git commit -m "Deploy $VERSION" || echo "No changes to commit"
-git push
-
-cd ..
-
-echo "✅ Deployed to https://kccleoc.github.io/seedpgp-web-app/"
-echo ""
-echo "Tag private repo:"
-echo "  git tag $VERSION && git push origin --tags"

src/App.tsx

@@ -1,30 +1,43 @@
 import { useState, useEffect } from 'react';
 import {
-  Shield,
   QrCode,
   RefreshCw,
-  CheckCircle2, Lock,
+  CheckCircle2,
+  Lock,
   AlertCircle,
   Unlock,
   EyeOff,
   FileKey,
   Info,
-  WifiOff
 } from 'lucide-react';
 import { PgpKeyInput } from './components/PgpKeyInput';
 import { QrDisplay } from './components/QrDisplay';
 import QRScanner from './components/QRScanner';
 import { validateBip39Mnemonic } from './lib/bip39';
-import { buildPlaintext, encryptToSeedPgp, decryptSeedPgp } from './lib/seedpgp';
+import { buildPlaintext, encryptToSeed, decryptFromSeed, detectEncryptionMode } from './lib/seedpgp';
 import * as openpgp from 'openpgp';
-import { StorageIndicator } from './components/StorageIndicator';
 import { SecurityWarnings } from './components/SecurityWarnings';
-import { ClipboardTracker } from './components/ClipboardTracker';
-import { ReadOnly } from './components/ReadOnly';
 import { getSessionKey, encryptJsonToBlob, destroySessionKey, EncryptedBlob } from './lib/sessionCrypto';
+import Header from './components/Header';
+import { StorageDetails } from './components/StorageDetails';
+import { ClipboardDetails } from './components/ClipboardDetails';
+import Footer from './components/Footer';
 
 console.log("OpenPGP.js version:", openpgp.config.versionString);
 
+interface StorageItem {
+  key: string;
+  value: string;
+  size: number;
+  isSensitive: boolean;
+}
+
+interface ClipboardEvent {
+    timestamp: Date;
+    field: string;
+    length: number;
+}
+
 function App() {
   const [activeTab, setActiveTab] = useState<'backup' | 'restore'>('backup');
   const [mnemonic, setMnemonic] = useState('');
@@ -45,22 +58,56 @@ import { getSessionKey, encryptJsonToBlob, destroySessionKey, EncryptedBlob } fr
   const [showQRScanner, setShowQRScanner] = useState(false);
   const [isReadOnly, setIsReadOnly] = useState(false);
   const [encryptedMnemonicCache, setEncryptedMnemonicCache] = useState<EncryptedBlob | null>(null);
+  const [showSecurityModal, setShowSecurityModal] = useState(false);
+  const [showStorageModal, setShowStorageModal] = useState(false);
+  const [showClipboardModal, setShowClipboardModal] = useState(false);
+  const [localItems, setLocalItems] = useState<StorageItem[]>([]);
+  const [sessionItems, setSessionItems] = useState<StorageItem[]>([]);
+  const [clipboardEvents, setClipboardEvents] = useState<ClipboardEvent[]>([]);
+  const [showLockConfirm, setShowLockConfirm] = useState(false);
+
+  // Krux integration state
+  const [encryptionMode, setEncryptionMode] = useState<'pgp' | 'krux'>('pgp');
+  const [kruxLabel, setKruxLabel] = useState('Seed Backup');
+  const [kruxIterations, setKruxIterations] = useState(200000);
+  const [detectedMode, setDetectedMode] = useState<'pgp' | 'krux' | null>(null);
+
+  const SENSITIVE_PATTERNS = ['key', 'mnemonic', 'seed', 'private', 'secret', 'pgp', 'password'];
+
+  const isSensitiveKey = (key: string): boolean => {
+      const lowerKey = key.toLowerCase();
+      return SENSITIVE_PATTERNS.some(pattern => lowerKey.includes(pattern));
+  };
+
+  const getStorageItems = (storage: Storage): StorageItem[] => {
+      const items: StorageItem[] = [];
+      for (let i = 0; i < storage.length; i++) {
+          const key = storage.key(i);
+          if (key) {
+              const value = storage.getItem(key) || '';
+              items.push({
+                  key,
+                  value: value.substring(0, 50) + (value.length > 50 ? '...' : ''),
+                  size: new Blob([value]).size,
+                  isSensitive: isSensitiveKey(key)
+              });
+          }
+      }
+      return items.sort((a, b) => (b.isSensitive ? 1 : 0) - (a.isSensitive ? 1 : 0));
+  };
+
+  const refreshStorage = () => {
+      setLocalItems(getStorageItems(localStorage));
+      setSessionItems(getStorageItems(sessionStorage));
+  };
 
   useEffect(() => {
-     // When entering read-only mode, clear sensitive data for security.
+      refreshStorage();
-     if (isReadOnly) {
+      const interval = setInterval(refreshStorage, 2000);
-       setMnemonic('');
+      return () => clearInterval(interval);
-       setBackupMessagePassword('');
+  }, []);
-       setRestoreMessagePassword('');
+
-       setPublicKeyInput('');
+
-       setPrivateKeyInput('');
-       setPrivateKeyPassphrase('');
-       setQrPayload('');
-       setRestoreInput('');
-       setDecryptedRestoredMnemonic(null);
-       setError('');
-     }
-   }, [isReadOnly]);
 
   // Cleanup session key on component unmount
   useEffect(() => {
@@ -69,6 +116,104 @@ import { getSessionKey, encryptJsonToBlob, destroySessionKey, EncryptedBlob } fr
     };
   }, []);
 
+  useEffect(() => {
+    const handleCopy = (e: ClipboardEvent & Event) => {
+        const target = e.target as HTMLElement;
+
+        // Get selection to measure length
+        const selection = window.getSelection()?.toString() || '';
+        const length = selection.length;
+
+        if (length === 0) return; // Nothing copied
+
+        // Detect field name
+        let field = 'Unknown field';
+
+        if (target.tagName === 'TEXTAREA' || target.tagName === 'INPUT') {
+            // Try multiple ways to identify the field
+            field =
+                target.getAttribute('aria-label') ||
+                target.getAttribute('name') ||
+                target.getAttribute('id') ||
+                (target as HTMLInputElement).type ||
+                target.tagName.toLowerCase();
+
+            // Check parent labels
+            const label = target.closest('label') ||
+                document.querySelector(`label[for="${target.id}"]`);
+            if (label) {
+                field = label.textContent?.trim() || field;
+            }
+
+            // Check for data-sensitive attribute
+            const sensitiveAttr = target.getAttribute('data-sensitive') ||
+                target.closest('[data-sensitive]')?.getAttribute('data-sensitive');
+            if (sensitiveAttr) {
+                field = sensitiveAttr;
+            }
+
+            // Detect if it looks like sensitive data
+            const isSensitive = /mnemonic|seed|key|private|password|secret/i.test(
+                target.className + ' ' + field + ' ' + (target.getAttribute('placeholder') || '')
+            );
+
+            if (isSensitive && field === target.tagName.toLowerCase()) {
+                // Try to guess from placeholder
+                const placeholder = target.getAttribute('placeholder');
+                if (placeholder) {
+                    field = placeholder.substring(0, 40) + '...';
+                }
+            }
+        }
+
+        setClipboardEvents(prev => [
+            { timestamp: new Date(), field, length },
+            ...prev.slice(0, 9) // Keep last 10 events
+        ]);
+    };
+
+    document.addEventListener('copy', handleCopy as EventListener);
+    return () => document.removeEventListener('copy', handleCopy as EventListener);
+  }, []);
+
+  // Detect encryption mode from restore input
+  useEffect(() => {
+    if (activeTab === 'restore' && restoreInput.trim()) {
+      const detected = detectEncryptionMode(restoreInput);
+      setDetectedMode(detected);
+      // Auto-switch mode if not already set
+      if (detected !== encryptionMode) {
+        setEncryptionMode(detected);
+      }
+    } else {
+      setDetectedMode(null);
+    }
+  }, [restoreInput, activeTab, encryptionMode]);
+
+  const clearClipboard = async () => {
+      try {
+          // Actually clear the system clipboard
+          await navigator.clipboard.writeText('');
+
+          // Clear history
+          setClipboardEvents([]);
+
+          // Show success briefly
+          alert('✅ Clipboard cleared and history wiped');
+      } catch (err) {
+          // Fallback for browsers that don't support clipboard API
+          const dummy = document.createElement('textarea');
+          dummy.value = '';
+          document.body.appendChild(dummy);
+          dummy.select();
+          document.execCommand('copy');
+          document.body.removeChild(dummy);
+
+          setClipboardEvents([]);
+          alert('✅ History cleared (clipboard may require manual clearing)');
+      }
+  };
+
 
   const copyToClipboard = async (text: string) => {
     if (isReadOnly) {
@@ -108,10 +253,13 @@ import { getSessionKey, encryptJsonToBlob, destroySessionKey, EncryptedBlob } fr
 
       const plaintext = buildPlaintext(mnemonic, hasBip39Passphrase);
 
-       const result = await encryptToSeedPgp({
+      const result = await encryptToSeed({
         plaintext,
         publicKeyArmored: publicKeyInput || undefined,
         messagePassword: backupMessagePassword || undefined,
+        mode: encryptionMode,
+        kruxLabel: encryptionMode === 'krux' ? kruxLabel : undefined,
+        kruxIterations: encryptionMode === 'krux' ? kruxIterations : undefined,
       });
 
       setQrPayload(result.framed);
@@ -138,11 +286,15 @@ import { getSessionKey, encryptJsonToBlob, destroySessionKey, EncryptedBlob } fr
     setDecryptedRestoredMnemonic(null);
 
     try {
-       const result = await decryptSeedPgp({
+      // Auto-detect mode if not manually set
+      const modeToUse = detectedMode || encryptionMode;
+      
+      const result = await decryptFromSeed({
         frameText: restoreInput,
         privateKeyArmored: privateKeyInput || undefined,
         privateKeyPassphrase: privateKeyPassphrase || undefined,
         messagePassword: restoreMessagePassword || undefined,
+        mode: modeToUse,
       });
 
       // Encrypt the restored mnemonic with the session key
@@ -181,80 +333,40 @@ import { getSessionKey, encryptJsonToBlob, destroySessionKey, EncryptedBlob } fr
     setShowQRScanner(false);
   };
 
+  const handleToggleLock = () => {
+    if (!isReadOnly) {
+      // About to lock - show confirmation
+      setShowLockConfirm(true);
+    } else {
+      // Unlocking - no confirmation needed
+      setIsReadOnly(false);
+    }
+  };
+
+  const confirmLock = () => {
+    setIsReadOnly(true);
+    setShowLockConfirm(false);
+  };
+
 
   return (
-     <>
+    <div className="min-h-screen bg-slate-800 text-slate-100">
-       <div className="min-h-screen bg-gradient-to-br from-slate-50 to-slate-100 text-slate-900 p-4 md:p-8">
+      <Header 
-         <div className="max-w-5xl mx-auto bg-white rounded-2xl shadow-2xl overflow-hidden border border-slate-200">
+        onOpenSecurityModal={() => setShowSecurityModal(true)} 
- 
+        localItems={localItems} 
-           {/* Header */}
+        sessionItems={sessionItems} 
-           <div className="bg-gradient-to-r from-slate-900 to-slate-800 p-6 text-white flex items-center justify-between">
+        onOpenStorageModal={() => setShowStorageModal(true)}
-             <div className="flex items-center gap-3">
+        events={clipboardEvents}
-               <div className="p-2 bg-blue-600 rounded-lg shadow-lg">
+        onOpenClipboardModal={() => setShowClipboardModal(true)}
-                 <Shield size={28} />
+        activeTab={activeTab}
-               </div>
+        setActiveTab={setActiveTab}
-               <div>
+        encryptedMnemonicCache={encryptedMnemonicCache}
-                 <h1 className="text-2xl font-bold tracking-tight">
+        handleLockAndClear={handleLockAndClear}
-                   SeedPGP <span className="text-blue-400 font-mono text-base ml-2">v{__APP_VERSION__}</span>
+        appVersion={__APP_VERSION__}
-                 </h1>
+        isLocked={isReadOnly}
-                 <p className="text-xs text-slate-400 mt-0.5">OpenPGP-secured BIP39 backup</p>
+        onToggleLock={handleToggleLock}
-               </div>
+      />
-             </div>
+      <main className="max-w-7xl mx-auto px-6 py-4">
-             {encryptedMnemonicCache && ( // Show only if encrypted data exists
-               <button
-                 onClick={handleLockAndClear}
-                 className="flex items-center gap-2 text-sm text-red-400 bg-slate-800/50 px-3 py-1.5 rounded-lg hover:bg-red-900/50 transition-colors"
-               >
-                 <Lock size={16} />
-                 <span>Lock/Clear</span>
-               </button>
-             )}
-             <div className="flex items-center gap-4">
-               {isReadOnly && (
-                 <div className="flex items-center gap-2 text-sm text-amber-400 bg-slate-800/50 px-3 py-1.5 rounded-lg">
-                   <WifiOff size={16} />
-                   <span>Read-only</span>
-                 </div>
-               )}
-               {encryptedMnemonicCache && (
-                 <div className="flex items-center gap-2 text-sm text-green-400 bg-slate-800/50 px-3 py-1.5 rounded-lg">
-                   <Shield size={16} />
-                   <span>Encrypted in memory</span>
-                 </div>
-               )}
-               <div className="flex bg-slate-800/50 rounded-lg p-1 backdrop-blur">
-                 <button
-                   onClick={() => {
-                     setActiveTab('backup');
-                     setError('');
-                     setQrPayload('');
-                     setDecryptedRestoredMnemonic(null);
-                   }}
-                   className={`px-5 py-2 rounded-md text-sm font-semibold transition-all ${activeTab === 'backup'
-                     ? 'bg-white text-slate-900 shadow-lg'
-                     : 'text-slate-300 hover:text-white hover:bg-slate-700/50'
-                     }`}
-                 >
-                   Backup
-                 </button>
-                 <button
-                   onClick={() => {
-                     setActiveTab('restore');
-                     setError('');
-                     setQrPayload('');
-                     setDecryptedRestoredMnemonic(null);
-                   }}
-                   className={`px-5 py-2 rounded-md text-sm font-semibold transition-all ${activeTab === 'restore'
-                     ? 'bg-white text-slate-900 shadow-lg'
-                     : 'text-slate-300 hover:text-white hover:bg-slate-700/50'
-                     }`}
-                 >
-                   Restore
-                 </button>
-               </div>
-             </div>
-           </div>
- 
         <div className="p-6 md:p-8 space-y-6">
              {/* Error Display */}
              {error && (
@@ -269,23 +381,26 @@ import { getSessionKey, encryptJsonToBlob, destroySessionKey, EncryptedBlob } fr
  
              {/* Info Banner */}
              {recipientFpr && activeTab === 'backup' && (
-               <div className="p-3 bg-blue-50 border border-blue-200 rounded-lg flex items-start gap-3 text-blue-800 text-xs animate-in fade-in">
+               <div className="p-3 bg-teal-50 border border-teal-200 rounded-lg flex items-start gap-3 text-teal-800 text-xs animate-in fade-in">
                  <Info size={16} className="shrink-0 mt-0.5" />
                  <div>
-                   <strong>Recipient Key:</strong> <code className="bg-blue-100 px-1.5 py-0.5 rounded font-mono">{recipientFpr}</code>
+                   <strong>Recipient Key:</strong> <code className="bg-teal-100 px-1.5 py-0.5 rounded font-mono">{recipientFpr}</code>
                  </div>
                </div>
              )}
  
              {/* Main Content Grid */}
-             <div className="grid gap-6 md:grid-cols-3">
+             <div className="grid gap-6 md:grid-cols-3 md:items-start">
                <div className="md:col-span-2 space-y-6">
                  {activeTab === 'backup' ? (
                    <>
                      <div className="space-y-2">
-                       <label className="text-sm font-semibold text-slate-700">BIP39 Mnemonic</label>
+                       <label className="text-sm font-semibold text-slate-200">BIP39 Mnemonic</label>
                        <textarea
-                         className="w-full h-32 p-4 bg-slate-50 border border-slate-200 rounded-xl text-sm font-mono focus:outline-none focus:ring-2 focus:ring-blue-500 transition-all resize-none"
+                         className={`w-full h-32 p-4 bg-slate-50 border border-slate-200 rounded-xl text-sm font-mono text-slate-900 placeholder:text-slate-400 focus:outline-none focus:ring-2 focus:ring-teal-500 transition-all resize-none ${
+                            isReadOnly ? 'blur-sm select-none' : ''
+                          }`}
+                       
                          data-sensitive="BIP39 Mnemonic"
                          placeholder="Enter your 12 or 24 word seed phrase..."
                          value={mnemonic}
@@ -317,9 +432,12 @@ import { getSessionKey, encryptJsonToBlob, destroySessionKey, EncryptedBlob } fr
                      </div>
  
                      <div className="space-y-2">
-                       <label className="text-sm font-semibold text-slate-700">SEEDPGP1 Payload</label>
+                       <label className="text-sm font-semibold text-slate-200">SEEDPGP1 Payload</label>
                        <textarea
-                         className="w-full h-32 p-4 bg-slate-50 border border-slate-200 rounded-xl text-xs font-mono focus:outline-none focus:ring-2 focus:ring-blue-500 transition-all resize-none"
+                         className={`w-full h-32 p-4 bg-slate-50 border border-slate-200 rounded-xl text-xs font-mono text-slate-900 placeholder:text-slate-400 focus:outline-none focus:ring-2 focus:ring-teal-500 transition-all resize-none ${
+                            isReadOnly ? 'blur-sm select-none' : ''
+                          }`}
+                       
                          placeholder="SEEDPGP1:0:ABCD:..."
                          value={restoreInput}
                          onChange={(e) => setRestoreInput(e.target.value)}
@@ -345,7 +463,9 @@ import { getSessionKey, encryptJsonToBlob, destroySessionKey, EncryptedBlob } fr
                            <input
                              type="password"
                              data-sensitive="Message Password"
-                             className="w-full pl-10 pr-4 py-2.5 bg-white border border-slate-200 rounded-lg text-sm focus:outline-none focus:ring-2 focus:ring-blue-500 transition-all"
+                                   className={`w-full pl-10 pr-4 py-2.5 bg-white border border-slate-200 rounded-lg text-sm focus:outline-none focus:ring-2 focus:ring-teal-500 transition-all ${
+                                isReadOnly ? 'blur-sm select-none' : ''
+                              }`}
                              placeholder="Unlock private key..."
                              value={privateKeyPassphrase}
                              onChange={(e) => setPrivateKeyPassphrase(e.target.value)}
@@ -359,11 +479,73 @@ import { getSessionKey, encryptJsonToBlob, destroySessionKey, EncryptedBlob } fr
                </div>
  
                {/* Security Panel */}
-               <div className="space-y-6">
+               <div className="space-y-2"> {/* Added space-y-2 wrapper */}
+                 <label className="text-sm font-semibold text-slate-200 flex items-center gap-2">
+                   <Lock size={14} /> SECURITY OPTIONS
+                 </label>
+                 
                  <div className="p-5 bg-gradient-to-br from-slate-50 to-slate-100 rounded-2xl border-2 border-slate-200 shadow-inner space-y-4">
-                   <h3 className="text-sm font-bold text-slate-800 uppercase tracking-wider flex items-center gap-2">
+                   {/* Removed h3 */}
-                     <Lock size={14} /> Security Options
+
-                   </h3>
+                   {/* Encryption Mode Toggle */}
+                   <div className="space-y-2">
+                     <label className="text-xs font-bold text-slate-500 uppercase tracking-wider">Encryption Mode</label>
+                     <select
+                       value={encryptionMode}
+                       onChange={(e) => setEncryptionMode(e.target.value as 'pgp' | 'krux')}
+                       disabled={isReadOnly}
+                       className="w-full px-3 py-2.5 bg-white border border-slate-200 rounded-lg text-sm focus:outline-none focus:ring-2 focus:ring-teal-500 transition-all"
+                     >
+                       <option value="pgp">PGP (Asymmetric)</option>
+                       <option value="krux">Krux KEF (Passphrase)</option>
+                     </select>
+                     <p className="text-[10px] text-slate-500 mt-1">
+                       {encryptionMode === 'pgp' 
+                         ? 'Uses PGP keys or password' 
+                         : 'Uses passphrase only (Krux compatible)'}
+                     </p>
+                   </div>
+ 
+                   {/* Krux-specific fields */}
+                   {encryptionMode === 'krux' && activeTab === 'backup' && (
+                     <>
+                       <div className="space-y-2 pt-2">
+                         <label className="text-xs font-bold text-slate-500 uppercase tracking-wider">Krux Label</label>
+                         <div className="relative">
+                           <input
+                             type="text"
+                             className={`w-full pl-3 pr-4 py-2.5 bg-white border border-slate-200 rounded-lg text-sm focus:outline-none focus:ring-2 focus:ring-teal-500 transition-all ${
+                               isReadOnly ? 'blur-sm select-none' : ''
+                             }`}
+                             placeholder="e.g., My Seed 2026"
+                             value={kruxLabel}
+                             onChange={(e) => setKruxLabel(e.target.value)}
+                             readOnly={isReadOnly}
+                           />
+                         </div>
+                         <p className="text-[10px] text-slate-500 mt-1">Label for identification (max 252 bytes)</p>
+                       </div>
+                       
+                       <div className="space-y-2">
+                         <label className="text-xs font-bold text-slate-500 uppercase tracking-wider">PBKDF2 Iterations</label>
+                         <div className="relative">
+                           <input
+                             type="number"
+                             className={`w-full pl-3 pr-4 py-2.5 bg-white border border-slate-200 rounded-lg text-sm focus:outline-none focus:ring-2 focus:ring-teal-500 transition-all ${
+                               isReadOnly ? 'blur-sm select-none' : ''
+                             }`}
+                             placeholder="e.g., 200000"
+                             value={kruxIterations}
+                             onChange={(e) => setKruxIterations(Number(e.target.value))}
+                             min={10000}
+                             step={10000}
+                             readOnly={isReadOnly}
+                           />
+                         </div>
+                         <p className="text-[10px] text-slate-500 mt-1">Higher = more secure but slower (default: 200,000)</p>
+                       </div>
+                     </>
+                   )}
  
                    <div className="space-y-2">
                      <label className="text-xs font-bold text-slate-500 uppercase tracking-wider">Message Password</label>
@@ -371,14 +553,20 @@ import { getSessionKey, encryptJsonToBlob, destroySessionKey, EncryptedBlob } fr
                        <Lock className="absolute left-3 top-3 text-slate-400" size={16} />
                        <input
                          type="password"
-                         className="w-full pl-10 pr-4 py-2.5 bg-white border border-slate-200 rounded-lg text-sm focus:outline-none focus:ring-2 focus:ring-blue-500 transition-all"
+                               className={`w-full pl-10 pr-4 py-2.5 bg-white border border-slate-200 rounded-lg text-sm focus:outline-none focus:ring-2 focus:ring-teal-500 transition-all ${
-                         placeholder="Optional password..."
+                                isReadOnly ? 'blur-sm select-none' : ''
+                              }`}
+                         placeholder={encryptionMode === 'krux' ? "Required for Krux encryption" : "Optional password..."}
                          value={activeTab === 'backup' ? backupMessagePassword : restoreMessagePassword}
                          onChange={(e) => activeTab === 'backup' ? setBackupMessagePassword(e.target.value) : setRestoreMessagePassword(e.target.value)}
                          readOnly={isReadOnly}
                        />
                      </div>
-                     <p className="text-[10px] text-slate-500 mt-1">Symmetric encryption password (SKESK)</p>
+                     <p className="text-[10px] text-slate-500 mt-1">
+                       {encryptionMode === 'krux' 
+                         ? 'Required passphrase for Krux encryption' 
+                         : 'Symmetric encryption password (SKESK)'}
+                     </p>
                    </div>
  
  
@@ -390,7 +578,7 @@ import { getSessionKey, encryptJsonToBlob, destroySessionKey, EncryptedBlob } fr
                            checked={hasBip39Passphrase}
                            onChange={(e) => setHasBip39Passphrase(e.target.checked)}
                            disabled={isReadOnly}
-                           className="rounded text-blue-600 focus:ring-2 focus:ring-blue-500 transition-all"
+                           className="rounded text-teal-600 focus:ring-2 focus:ring-teal-500 transition-all"
                          />
                          <span className="text-xs font-medium text-slate-700 group-hover:text-slate-900 transition-colors">
                            BIP39 25th word active
@@ -399,12 +587,6 @@ import { getSessionKey, encryptJsonToBlob, destroySessionKey, EncryptedBlob } fr
                      </div>
                    )}
  
-                   <ReadOnly
-                     isReadOnly={isReadOnly}
-                     onToggle={setIsReadOnly}
-                     appVersion={__APP_VERSION__}
-                     buildHash={__BUILD_HASH__}
-                   />
                  </div>
  
                  {/* Action Button */}
@@ -412,7 +594,7 @@ import { getSessionKey, encryptJsonToBlob, destroySessionKey, EncryptedBlob } fr
                    <button
                      onClick={handleBackup}
                      disabled={!mnemonic || loading || isReadOnly}
-                     className="w-full py-4 bg-gradient-to-r from-blue-600 to-blue-700 text-white rounded-xl font-bold flex items-center justify-center gap-2 hover:from-blue-700 hover:to-blue-800 transition-all shadow-lg hover:shadow-xl disabled:opacity-50 disabled:cursor-not-allowed disabled:hover:from-blue-600 disabled:hover:to-blue-700"
+                     className="w-full py-4 bg-gradient-to-r from-teal-500 to-cyan-600 text-white rounded-xl font-bold flex items-center justify-center gap-2 hover:from-teal-600 hover:to-cyan-700 transition-all shadow-lg hover:shadow-xl disabled:opacity-50 disabled:cursor-not-allowed disabled:hover:from-teal-500 disabled:hover:to-cyan-600"
                    >
                      {loading ? (
                        <RefreshCw className="animate-spin" size={20} />
@@ -441,7 +623,7 @@ import { getSessionKey, encryptJsonToBlob, destroySessionKey, EncryptedBlob } fr
              {/* QR Output */}
              {qrPayload && activeTab === 'backup' && (
                <div className="pt-6 border-t border-slate-200 space-y-6 animate-in fade-in slide-in-from-bottom-4">
-                 <div className="flex justify-center">
+                 <div className={isReadOnly ? 'blur-lg' : ''}>
                    <QrDisplay value={qrPayload} />
                  </div>
                  <div className="space-y-2">
@@ -464,7 +646,7 @@ import { getSessionKey, encryptJsonToBlob, destroySessionKey, EncryptedBlob } fr
                      readOnly
                      value={qrPayload}
                      onFocus={(e) => e.currentTarget.select()}
-                     className="w-full h-28 p-3 bg-slate-900 rounded-xl font-mono text-[10px] text-green-400 border border-slate-700 shadow-inner leading-relaxed resize-none focus:outline-none focus:ring-2 focus:ring-blue-500"
+                     className="w-full h-28 p-3 bg-slate-900 rounded-xl font-mono text-[10px] text-green-400 placeholder:text-slate-500 border border-slate-700 shadow-inner leading-relaxed resize-none focus:outline-none focus:ring-2 focus:ring-teal-500"
                    />
                    <p className="text-[11px] text-slate-500">
                      Tip: click the box to select all, or use Copy.
@@ -490,7 +672,9 @@ import { getSessionKey, encryptJsonToBlob, destroySessionKey, EncryptedBlob } fr
                    </div>
  
                    <div className="p-6 bg-white rounded-xl border-2 border-green-200 shadow-sm">
-                     <p className="font-mono text-center text-lg text-slate-800 tracking-wide leading-relaxed break-words">
+                     <p className={`font-mono text-center text-lg text-slate-800 tracking-wide leading-relaxed break-words ${
+                        isReadOnly ? 'blur-md select-none' : ''
+                      }`}>
                        {decryptedRestoredMnemonic}
                      </p>
                    </div>
@@ -498,14 +682,12 @@ import { getSessionKey, encryptJsonToBlob, destroySessionKey, EncryptedBlob } fr
                </div>
              )}
            </div>
-         </div>
+      </main>
- 
+      <Footer 
-         {/* Footer */}
+        appVersion={__APP_VERSION__} 
-         <div className="mt-8 text-center text-xs text-slate-500">
+        buildHash={__BUILD_HASH__} 
-           <p>SeedPGP v{__APP_VERSION__} • OpenPGP (RFC 4880) + Base45 (RFC 9285) + CRC16/CCITT-FALSE</p>
+        buildTimestamp={__BUILD_TIMESTAMP__} 
-           <p className="mt-1">Never share your private keys or seed phrases. Always verify on an airgapped device.</p>
+      />
-         </div>
-       </div>
 
       {/* QR Scanner Modal */}
       {showQRScanner && (
@@ -518,23 +700,105 @@ import { getSessionKey, encryptJsonToBlob, destroySessionKey, EncryptedBlob } fr
           onClose={() => setShowQRScanner(false)}
         />
       )}
-       <div className="max-w-4xl mx-auto p-8">
-         <h1>SeedPGP v1.2.0</h1>
-         {/* ... rest of your app ... */}
-       </div>
       
-       {/* Floating Storage Monitor - bottom right */}
+      {/* Security Modal */}
-       {!isReadOnly && (
+      {showSecurityModal && (
-         <>
+        <div 
-           <StorageIndicator />
+          className="fixed inset-0 bg-black/50 backdrop-blur-sm flex items-center justify-center z-50"
+          onClick={() => setShowSecurityModal(false)}
+        >
+          <div 
+            className="bg-slate-800 rounded-xl border border-slate-700 p-6 max-w-md w-full mx-4 shadow-2xl"
+            onClick={(e) => e.stopPropagation()}
+          >
+            <h3 className="text-lg font-semibold text-white mb-4">Security Limitations</h3>
+            <div className="text-sm text-slate-300 space-y-2">
               <SecurityWarnings />
-           <ClipboardTracker />
+            </div>
-         </>
+          </div>
+        </div>
       )}
-     </>
 
+      {/* Storage Modal */}
+      {showStorageModal && (
+        <div 
+          className="fixed inset-0 bg-black/50 backdrop-blur-sm flex items-center justify-center z-50"
+          onClick={() => setShowStorageModal(false)}
+        >
+          <div 
+            className="bg-slate-800 rounded-xl border border-slate-700 p-6 max-w-md w-full mx-4 shadow-2xl"
+            onClick={(e) => e.stopPropagation()}
+          >
+            <h3 className="text-lg font-semibold text-white mb-4">Storage Details</h3>
+            <div className="text-sm text-slate-300 space-y-2">
+              <StorageDetails localItems={localItems} sessionItems={sessionItems} />
+            </div>
+          </div>
+        </div>
+      )}
+
+      {/* Clipboard Modal */}
+      {showClipboardModal && (
+        <div 
+          className="fixed inset-0 bg-black/50 backdrop-blur-sm flex items-center justify-center z-50"
+          onClick={() => setShowClipboardModal(false)}
+        >
+          <div 
+            className="bg-slate-800 rounded-xl border border-slate-700 p-6 max-w-md w-full mx-4 shadow-2xl"
+            onClick={(e) => e.stopPropagation()}
+          >
+            <h3 className="text-lg font-semibold text-white mb-4">Clipboard Activity</h3>
+            <div className="text-sm text-slate-300 space-y-2">
+              <ClipboardDetails events={clipboardEvents} onClear={clearClipboard} />
+            </div>
+          </div>
+        </div>
+      )}
+
+      {/* Lock Confirmation Modal */}
+      {showLockConfirm && (
+        <div 
+          className="fixed inset-0 bg-black/50 backdrop-blur-sm flex items-center justify-center z-50"
+          onClick={() => setShowLockConfirm(false)}
+        >
+          <div 
+            className="bg-slate-800 rounded-xl border border-slate-700 p-6 max-w-md w-full mx-4 shadow-2xl"
+            onClick={(e) => e.stopPropagation()}
+          >
+            <h3 className="text-lg font-semibold text-white mb-4 flex items-center gap-2">
+              <Lock className="w-5 h-5 text-amber-500" />
+              Lock Sensitive Data?
+            </h3>
+            <div className="text-sm text-slate-300 space-y-3 mb-6">
+              <p>This will:</p>
+              <ul className="list-disc list-inside space-y-1 text-slate-400">
+                <li>Blur all sensitive data (mnemonics, keys, passwords)</li>
+                <li>Disable all inputs</li>
+                <li>Prevent clipboard operations</li>
+              </ul>
+              <p className="text-xs text-slate-500 mt-2">
+                Use this when showing the app to others or stepping away from your device.
+              </p>
+            </div>
+            <div className="flex gap-3">
+              <button 
+                className="flex-1 py-2 bg-slate-700 hover:bg-slate-600 rounded-lg transition-colors"
+                onClick={() => setShowLockConfirm(false)}
+              >
+                Cancel
+              </button>
+              <button 
+                className="flex-1 py-2 bg-amber-500 hover:bg-amber-600 text-white font-semibold rounded-lg transition-colors"
+                onClick={confirmLock}
+              >
+                Lock Data
+              </button>
+            </div>
+          </div>
+        </div>
+      )}
+    </div>
   );
- 
 }
 
 export default App;

src/components/ClipboardDetails.tsx

@@ -0,0 +1,62 @@
+import React from 'react';
+
+interface ClipboardEvent {
+    timestamp: Date;
+    field: string;
+    length: number;
+}
+
+interface ClipboardDetailsProps {
+  events: ClipboardEvent[];
+  onClear: () => void;
+}
+
+export const ClipboardDetails: React.FC<ClipboardDetailsProps> = ({ events, onClear }) => {
+    return (
+        <div>
+            {events.length > 0 && (
+                <div className="mb-3 bg-orange-100 border border-orange-300 rounded-md p-3 text-xs text-orange-900">
+                    <strong>⚠️ Clipboard Warning:</strong> Copied data is accessible to other apps,
+                    browser tabs, and extensions. Clear clipboard after use.
+                </div>
+            )}
+
+            {events.length > 0 ? (
+                <>
+                    <div className="space-y-2 mb-3 max-h-64 overflow-y-auto">
+                        {events.map((event, idx) => (
+                            <div
+                                key={idx}
+                                className="bg-white border border-orange-200 rounded-md p-2 text-xs"
+                            >
+                                <div className="flex justify-between items-start gap-2 mb-1">
+                                    <span className="font-semibold text-orange-900 break-all">
+                                        {event.field}
+                                    </span>
+                                    <span className="text-gray-400 text-[10px] whitespace-nowrap">
+                                        {event.timestamp.toLocaleTimeString()}
+                                    </span>
+                                </div>
+                                <div className="text-gray-600 text-[10px]">
+                                    Copied {event.length} character{event.length !== 1 ? 's' : ''}
+                                </div>
+                            </div>
+                        ))}
+                    </div>
+
+                    <button
+                        onClick={onClear}
+                        className="w-full text-xs py-2 px-3 bg-orange-600 hover:bg-orange-700 text-white rounded-md font-medium transition-colors"
+                    >
+                        🗑️ Clear Clipboard & History
+                    </button>
+                </>
+            ) : (
+                <div className="text-center py-4">
+                    <div className="text-3xl mb-2">✅</div>
+                    <p className="text-xs text-gray-500">No clipboard activity detected</p>
+                </div>
+            )}
+        </div>
+    );
+};

src/components/ClipboardTracker.tsx

@@ -1,184 +0,0 @@
-import { useState, useEffect } from 'react';
-
-interface ClipboardEvent {
-    timestamp: Date;
-    field: string;
-    length: number; // Show length without storing actual content
-}
-
-export const ClipboardTracker = () => {
-    const [events, setEvents] = useState<ClipboardEvent[]>([]);
-    const [isExpanded, setIsExpanded] = useState(false);
-
-    useEffect(() => {
-        const handleCopy = (e: ClipboardEvent & Event) => {
-            const target = e.target as HTMLElement;
-
-            // Get selection to measure length
-            const selection = window.getSelection()?.toString() || '';
-            const length = selection.length;
-
-            if (length === 0) return; // Nothing copied
-
-            // Detect field name
-            let field = 'Unknown field';
-
-            if (target.tagName === 'TEXTAREA' || target.tagName === 'INPUT') {
-                // Try multiple ways to identify the field
-                field =
-                    target.getAttribute('aria-label') ||
-                    target.getAttribute('name') ||
-                    target.getAttribute('id') ||
-                    (target as HTMLInputElement).type ||
-                    target.tagName.toLowerCase();
-
-                // Check parent labels
-                const label = target.closest('label') ||
-                    document.querySelector(`label[for="${target.id}"]`);
-                if (label) {
-                    field = label.textContent?.trim() || field;
-                }
-
-                // Check for data-sensitive attribute
-                const sensitiveAttr = target.getAttribute('data-sensitive') ||
-                    target.closest('[data-sensitive]')?.getAttribute('data-sensitive');
-                if (sensitiveAttr) {
-                    field = sensitiveAttr;
-                }
-
-                // Detect if it looks like sensitive data
-                const isSensitive = /mnemonic|seed|key|private|password|secret/i.test(
-                    target.className + ' ' + field + ' ' + (target.getAttribute('placeholder') || '')
-                );
-
-                if (isSensitive && field === target.tagName.toLowerCase()) {
-                    // Try to guess from placeholder
-                    const placeholder = target.getAttribute('placeholder');
-                    if (placeholder) {
-                        field = placeholder.substring(0, 40) + '...';
-                    }
-                }
-            }
-
-            setEvents(prev => [
-                { timestamp: new Date(), field, length },
-                ...prev.slice(0, 9) // Keep last 10 events
-            ]);
-
-            // Auto-expand on first copy
-            if (events.length === 0) {
-                setIsExpanded(true);
-            }
-        };
-
-        document.addEventListener('copy', handleCopy as EventListener);
-        return () => document.removeEventListener('copy', handleCopy as EventListener);
-    }, [events.length]);
-
-    const clearClipboard = async () => {
-        try {
-            // Actually clear the system clipboard
-            await navigator.clipboard.writeText('');
-
-            // Clear history
-            setEvents([]);
-
-            // Show success briefly
-            alert('✅ Clipboard cleared and history wiped');
-        } catch (err) {
-            // Fallback for browsers that don't support clipboard API
-            const dummy = document.createElement('textarea');
-            dummy.value = '';
-            document.body.appendChild(dummy);
-            dummy.select();
-            document.execCommand('copy');
-            document.body.removeChild(dummy);
-
-            setEvents([]);
-            alert('✅ History cleared (clipboard may require manual clearing)');
-        }
-    };
-
-    return (
-        <div className="fixed bottom-24 right-4 z-50 max-w-sm">
-            <div className={`rounded-lg shadow-lg border-2 transition-all ${events.length > 0
-                ? 'bg-orange-50 border-orange-400'
-                : 'bg-gray-50 border-gray-300'
-                }`}>
-
-                {/* Header */}
-                <div
-                    className={`px-4 py-3 cursor-pointer flex items-center justify-between rounded-t-lg transition-colors ${events.length > 0 ? 'hover:bg-orange-100' : 'hover:bg-gray-100'
-                        }`}
-                    onClick={() => setIsExpanded(!isExpanded)}
-                >
-                    <div className="flex items-center gap-2">
-                        <span className="text-lg">📋</span>
-                        <span className="font-semibold text-sm text-gray-700">Clipboard Activity</span>
-                    </div>
-
-                    <div className="flex items-center gap-2">
-                        {events.length > 0 && (
-                            <span className="text-xs bg-orange-500 text-white px-2 py-0.5 rounded-full font-medium">
-                                {events.length}
-                            </span>
-                        )}
-                        <span className="text-gray-400 text-sm">{isExpanded ? '▼' : '▶'}</span>
-                    </div>
-                </div>
-
-                {/* Expanded Content */}
-                {isExpanded && (
-                    <div className="p-4 border-t border-gray-300">
-                        {events.length > 0 && (
-                            <div className="mb-3 bg-orange-100 border border-orange-300 rounded-md p-3 text-xs text-orange-900">
-                                <strong>⚠️ Clipboard Warning:</strong> Copied data is accessible to other apps,
-                                browser tabs, and extensions. Clear clipboard after use.
-                            </div>
-                        )}
-
-                        {events.length > 0 ? (
-                            <>
-                                <div className="space-y-2 mb-3 max-h-64 overflow-y-auto">
-                                    {events.map((event, idx) => (
-                                        <div
-                                            key={idx}
-                                            className="bg-white border border-orange-200 rounded-md p-2 text-xs"
-                                        >
-                                            <div className="flex justify-between items-start gap-2 mb-1">
-                                                <span className="font-semibold text-orange-900 break-all">
-                                                    {event.field}
-                                                </span>
-                                                <span className="text-gray-400 text-[10px] whitespace-nowrap">
-                                                    {event.timestamp.toLocaleTimeString()}
-                                                </span>
-                                            </div>
-                                            <div className="text-gray-600 text-[10px]">
-                                                Copied {event.length} character{event.length !== 1 ? 's' : ''}
-                                            </div>
-                                        </div>
-                                    ))}
-                                </div>
-
-                                <button
-                                    onClick={(e) => {
-                                        e.stopPropagation(); // Prevent collapse toggle
-                                        clearClipboard();
-                                    }}
-                                    className="w-full text-xs py-2 px-3 bg-orange-600 hover:bg-orange-700 text-white rounded-md font-medium transition-colors"
-                                >
-                                    🗑️ Clear Clipboard & History
-                                </button>
-                            </>
-                        ) : (
-                            <div className="text-center py-4">
-                                <div className="text-3xl mb-2">✅</div>
-                                <p className="text-xs text-gray-500">No clipboard activity detected</p>
-                            </div>
-                        )}
-                    </div>
-                )}
-            </div>
-        </div>
-    );
-};

src/components/Footer.tsx

@@ -0,0 +1,18 @@
+import React from 'react';
+
+interface FooterProps {
+    appVersion: string;
+    buildHash: string;
+    buildTimestamp: string;
+}
+
+const Footer: React.FC<FooterProps> = ({ appVersion, buildHash, buildTimestamp }) => {
+    return (
+        <footer className="text-center text-xs text-slate-400 p-4">
+            <p>SeedPGP v{appVersion} • build {buildHash} • {buildTimestamp}</p>
+            <p className="mt-1">Never share your private keys or seed phrases. Always verify on an airgapped device.</p>
+        </footer>
+    );
+};
+
+export default Footer;

src/components/Header.tsx

@@ -0,0 +1,123 @@
+import React from 'react';
+import { Shield, Lock } from 'lucide-react';
+import SecurityBadge from './badges/SecurityBadge';
+import StorageBadge from './badges/StorageBadge';
+import ClipboardBadge from './badges/ClipboardBadge';
+import EditLockBadge from './badges/EditLockBadge';
+
+interface StorageItem {
+    key: string;
+    value: string;
+    size: number;
+    isSensitive: boolean;
+}
+
+interface ClipboardEvent {
+    timestamp: Date;
+    field: string;
+    length: number;
+}
+
+interface HeaderProps {
+  onOpenSecurityModal: () => void;
+  onOpenStorageModal: () => void;
+  localItems: StorageItem[];
+  sessionItems: StorageItem[];
+  events: ClipboardEvent[];
+  onOpenClipboardModal: () => void;
+  activeTab: 'backup' | 'restore';
+  setActiveTab: (tab: 'backup' | 'restore') => void;
+  encryptedMnemonicCache: any;
+  handleLockAndClear: () => void;
+  appVersion: string;
+  isLocked: boolean;
+  onToggleLock: () => void;
+}
+
+const Header: React.FC<HeaderProps> = ({ 
+    onOpenSecurityModal, 
+    onOpenStorageModal, 
+    localItems, 
+    sessionItems, 
+    events, 
+    onOpenClipboardModal,
+    activeTab,
+    setActiveTab,
+    encryptedMnemonicCache,
+    handleLockAndClear,
+    appVersion,
+    isLocked,
+    onToggleLock
+}) => {
+  return (
+    <header className="sticky top-0 z-50 bg-slate-900 border-b border-slate-800 backdrop-blur-sm">
+      <div className="max-w-7xl mx-auto px-6 py-4">
+        <div className="flex items-center justify-between">
+          {/* Left: Logo & Title */}
+          <div className="flex items-center gap-3">
+            <div className="w-10 h-10 bg-teal-500 rounded-lg flex items-center justify-center">
+              <Shield className="w-6 h-6 text-white" />
+            </div>
+            <div>
+              <h1 className="text-lg font-semibold text-white">
+                SeedPGP <span className="text-teal-400">v{appVersion}</span>
+              </h1>
+              <p className="text-xs text-slate-400">OpenPGP-secured BIP39 backup</p>
+            </div>
+          </div>
+
+          {/* Center: Monitoring Badges */}
+          <div className="hidden md:flex items-center gap-3">
+            <SecurityBadge onClick={onOpenSecurityModal} />
+            <div onClick={onOpenStorageModal} className="cursor-pointer">
+              <StorageBadge localItems={localItems} sessionItems={sessionItems} />
+            </div>
+            <div onClick={onOpenClipboardModal} className="cursor-pointer">
+              <ClipboardBadge events={events} onOpenClipboardModal={onOpenClipboardModal} />
+            </div>
+            <EditLockBadge isLocked={isLocked} onToggle={onToggleLock} />
+          </div>
+
+          {/* Right: Action Buttons */}
+          <div className="flex items-center gap-3">
+            {encryptedMnemonicCache && (
+                <button
+                    onClick={handleLockAndClear}
+                    className="flex items-center gap-2 text-sm text-red-400 bg-slate-800/50 px-3 py-1.5 rounded-lg hover:bg-red-900/50 transition-colors"
+                >
+                    <Lock size={16} />
+                    <span>Lock/Clear</span>
+                </button>
+            )}
+            <button 
+              className={`px-4 py-2 rounded-lg ${activeTab === 'backup' ? 'bg-teal-500 hover:bg-teal-600' : 'bg-slate-700 hover:bg-slate-600'}`}
+              onClick={() => setActiveTab('backup')}
+            >
+              Backup
+            </button>
+            <button 
+              className={`px-4 py-2 rounded-lg ${activeTab === 'restore' ? 'bg-teal-500 hover:bg-teal-600' : 'bg-slate-700 hover:bg-slate-600'}`}
+              onClick={() => setActiveTab('restore')}
+            >
+              Restore
+            </button>
+          </div>
+        </div>
+
+        {/* Mobile: Stack monitoring badges */}
+        <div className="md:hidden flex items-center gap-3 mt-3 pt-3 border-t border-slate-800">
+          <SecurityBadge onClick={onOpenSecurityModal} />
+          <div onClick={onOpenStorageModal} className="cursor-pointer">
+            <StorageBadge localItems={localItems} sessionItems={sessionItems} />
+          </div>
+          <div onClick={onOpenClipboardModal} className="cursor-pointer">
+            <ClipboardBadge events={events} onOpenClipboardModal={onOpenClipboardModal} />
+          </div>
+          <EditLockBadge isLocked={isLocked} onToggle={onToggleLock} />
+        </div>
+      </div>
+    </header>
+  );
+};
+
+export default Header;

src/components/PgpKeyInput.tsx

@@ -52,7 +52,7 @@ export const PgpKeyInput: React.FC<PgpKeyInputProps> = ({
 
     return (
         <div className="space-y-2">
-            <label className="text-sm font-semibold text-slate-700 flex items-center justify-between">
+            <label className="text-sm font-semibold text-slate-200 flex items-center justify-between">
                 <span className="flex items-center gap-2">
                     {Icon && <Icon size={14} />} {label}
                 </span>
@@ -69,7 +69,8 @@ export const PgpKeyInput: React.FC<PgpKeyInputProps> = ({
                 onDrop={handleDrop}
             >
                 <textarea
-                    className={`w-full h-40 p-3 bg-slate-50 border rounded-xl text-xs font-mono transition-colors resize-none focus:outline-none focus:ring-2 focus:ring-blue-500 ${isDragging && !readOnly ? 'border-blue-500 bg-blue-50' : 'border-slate-200'
+                    className={`w-full h-40 p-3 bg-slate-50 border rounded-xl text-xs font-mono transition-colors resize-none focus:outline-none focus:ring-2 focus:ring-teal-500 ${isDragging && !readOnly ? 'border-teal-500 bg-teal-50' : 'border-slate-200'} ${
+                        readOnly ? 'blur-sm select-none' : ''
                       }`}
                     placeholder={placeholder}
                     value={value}
@@ -77,8 +78,8 @@ export const PgpKeyInput: React.FC<PgpKeyInputProps> = ({
                     readOnly={readOnly}
                 />
                 {isDragging && !readOnly && (
-                    <div className="absolute inset-0 flex items-center justify-center bg-blue-50/90 rounded-xl border-2 border-dashed border-blue-500 pointer-events-none z-10">
+                    <div className="absolute inset-0 flex items-center justify-center bg-teal-50/90 rounded-xl border-2 border-dashed border-teal-500 pointer-events-none z-10">
-                        <div className="text-blue-600 font-bold flex flex-col items-center animate-bounce">
+                        <div className="text-teal-600 font-bold flex flex-col items-center animate-bounce">
                             <Upload size={24} />
                             <span className="text-sm mt-2">Drop Key File Here</span>
                         </div>

src/components/QRScanner.tsx

@@ -159,7 +159,7 @@ export default function QRScanner({ onScanSuccess, onClose }: QRScannerProps) {
                         <div className="space-y-3">
                             <button
                                 onClick={startCamera}
-                                className="w-full py-4 bg-gradient-to-r from-blue-600 to-blue-700 text-white rounded-xl font-semibold flex items-center justify-center gap-2 hover:from-blue-700 hover:to-blue-800 transition-all shadow-lg"
+                                className="w-full py-4 bg-gradient-to-r from-teal-500 to-cyan-600 text-white rounded-xl font-semibold flex items-center justify-center gap-2 hover:from-teal-600 hover:to-cyan-700 transition-all shadow-lg"
                             >
                                 <Camera size={20} />
                                 Use Camera
@@ -184,7 +184,7 @@ export default function QRScanner({ onScanSuccess, onClose }: QRScannerProps) {
                             {/* Info Box */}
                             <div className="pt-4 border-t border-slate-200">
                                 <div className="flex gap-2 text-xs text-slate-600 leading-relaxed">
-                                    <Info size={14} className="shrink-0 mt-0.5 text-blue-600" />
+                                    <Info size={14} className="shrink-0 mt-0.5 text-teal-600" />
                                     <div>
                                         <p><strong>Camera:</strong> Requires HTTPS or localhost</p>
                                         <p className="mt-1"><strong>Upload:</strong> Screenshot QR from Backup tab for testing</p>
@@ -210,7 +210,7 @@ export default function QRScanner({ onScanSuccess, onClose }: QRScannerProps) {
                     {/* File Processing View */}
                     {scanMode === 'file' && scanning && (
                         <div className="py-8 text-center">
-                            <div className="inline-block animate-spin rounded-full h-8 w-8 border-4 border-slate-200 border-t-blue-600"></div>
+                            <div className="inline-block animate-spin rounded-full h-8 w-8 border-4 border-slate-200 border-t-teal-600"></div>
                             <p className="mt-3 text-sm text-slate-600">Processing image...</p>
                         </div>
                     )}

src/components/ReadOnly.tsx

@@ -17,7 +17,7 @@ export function ReadOnly({ isReadOnly, onToggle, buildHash, appVersion }: ReadOn
           type="checkbox"
           checked={isReadOnly}
           onChange={(e) => onToggle(e.target.checked)}
-          className="rounded text-blue-600 focus:ring-2 focus:ring-blue-500 transition-all"
+          className="rounded text-teal-600 focus:ring-2 focus:ring-teal-500 transition-all"
         />
         <span className="text-xs font-medium text-slate-700 group-hover:text-slate-900 transition-colors">
           Read-only Mode

src/components/SecurityWarnings.tsx

@@ -1,28 +1,8 @@
-import { useState } from 'react';
+import React from 'react';
-
-export const SecurityWarnings = () => {
-    const [isExpanded, setIsExpanded] = useState(false);
 
+export const SecurityWarnings: React.FC = () => {
     return (
-        <div className="fixed bottom-4 left-4 z-50 max-w-sm">
+        <div className="space-y-3">
-            <div className="bg-yellow-50 border-2 border-yellow-400 rounded-lg shadow-lg">
-
-                {/* Header */}
-                <div
-                    className="px-4 py-3 cursor-pointer flex items-center justify-between hover:bg-yellow-100 transition-colors rounded-t-lg"
-                    onClick={() => setIsExpanded(!isExpanded)}
-                >
-                    <div className="flex items-center gap-2">
-                        <span className="text-lg">⚠️</span>
-                        <span className="font-semibold text-sm text-yellow-900">Security Limitations</span>
-                    </div>
-                    <span className="text-yellow-600 text-sm">{isExpanded ? '▼' : '▶'}</span>
-                </div>
-
-                {/* Expanded Content */}
-                {isExpanded && (
-                    <div className="px-4 py-3 border-t border-yellow-300 space-y-3 max-h-96 overflow-y-auto">
-
             <Warning
                 icon="🧵"
                 title="JavaScript Strings are Immutable"
@@ -59,23 +39,28 @@ export const SecurityWarnings = () => {
                 description="If hosted online: DNS, HTTPS, CDN, and browser can see usage patterns. Use offline/local for maximum security."
             />
 
-                        <div className="pt-2 border-t border-yellow-300 text-xs text-yellow-800">
+            <div className="pt-3 border-t border-slate-600 text-xs text-slate-400">
-                            <strong>Recommendation:</strong> Use this tool on a dedicated offline device.
+                <strong className="text-slate-300">Recommendation:</strong>{' '}
-                            Clear browser data after each use. Never use on shared/public computers.
+                Use this tool on a dedicated offline device. Clear browser data after each use. Never use on shared/public computers.
-                        </div>
-                    </div>
-                )}
             </div>
         </div>
     );
 };
 
-const Warning = ({ icon, title, description }: { icon: string; title: string; description: string }) => (
+const Warning = ({
-    <div className="flex gap-2 text-xs">
+    icon,
-        <span className="text-base flex-shrink-0">{icon}</span>
+    title,
+    description,
+}: {
+    icon: string;
+    title: string;
+    description: string;
+}) => (
+    <div className="flex gap-2 text-sm">
+        <span className="text-lg flex-shrink-0">{icon}</span>
         <div>
-            <div className="font-semibold text-yellow-900 mb-0.5">{title}</div>
+            <div className="font-semibold text-slate-200 mb-1">{title}</div>
-            <div className="text-yellow-800 leading-relaxed">{description}</div>
+            <div className="text-slate-400 leading-relaxed">{description}</div>
         </div>
     </div>
 );

src/components/StorageDetails.tsx

@@ -0,0 +1,82 @@
+import React from 'react';
+
+interface StorageItem {
+    key: string;
+    value: string;
+    size: number;
+    isSensitive: boolean;
+}
+
+interface StorageDetailsProps {
+  localItems: StorageItem[];
+  sessionItems: StorageItem[];
+}
+
+export const StorageDetails: React.FC<StorageDetailsProps> = ({ localItems, sessionItems }) => {
+    const totalItems = localItems.length + sessionItems.length;
+    const sensitiveCount = [...localItems, ...sessionItems].filter(i => i.isSensitive).length;
+
+    return (
+        <div>
+            {sensitiveCount > 0 && (
+                <div className="mb-3 bg-yellow-50 border border-yellow-300 rounded-md p-3 text-xs">
+                    <div className="flex items-start gap-2">
+                        <span className="text-yellow-600 mt-0.5">⚠️</span>
+                        <div className="text-yellow-800">
+                            <strong>Security Notice:</strong> Sensitive data persists in browser storage
+                            (survives refresh/restart). Clear manually if on shared device.
+                        </div>
+                    </div>
+                </div>
+            )}
+
+            <div className="space-y-3">
+                <StorageSection title="localStorage" items={localItems} icon="💾" />
+                <StorageSection title="sessionStorage" items={sessionItems} icon="⏱️" />
+            </div>
+
+            {totalItems === 0 && (
+                <div className="text-center py-6">
+                    <div className="text-4xl mb-2">✅</div>
+                    <p className="text-sm text-gray-500">No data in browser storage</p>
+                </div>
+            )}
+        </div>
+    );
+};
+
+const StorageSection = ({ title, items, icon }: { title: string; items: StorageItem[]; icon: string }) => {
+    if (items.length === 0) return null;
+
+    return (
+        <div>
+            <h4 className="text-xs font-bold text-gray-500 mb-2 flex items-center gap-1">
+                <span>{icon}</span>
+                <span className="uppercase">{title}</span>
+                <span className="ml-auto text-gray-400 font-normal">({items.length})</span>
+            </h4>
+            <div className="space-y-2">
+                {items.map((item) => (
+                    <div
+                        key={item.key}
+                        className={`text-xs rounded-md border p-2 ${item.isSensitive
+                                ? 'bg-red-50 border-red-300'
+                                : 'bg-gray-50 border-gray-200'
+                            }`}
+                    >
+                        <div className="flex justify-between items-start gap-2 mb-1">
+                            <span className={`font-mono font-semibold text-[11px] break-all ${item.isSensitive ? 'text-red-700' : 'text-gray-700'
+                                }`}>
+                                {item.isSensitive && '🔴 '}{item.key}
+                            </span>
+                            <span className="text-gray-400 text-[10px] whitespace-nowrap">{item.size}B</span>
+                        </div>
+                        <div className="text-gray-500 font-mono text-[10px] break-all leading-relaxed opacity-70">
+                            {item.value}
+                        </div>
+                    </div>
+                ))}
+            </div>
+        </div>
+    );
+};

src/components/StorageIndicator.tsx

@@ -1,150 +0,0 @@
-import { useState, useEffect } from 'react';
-
-interface StorageItem {
-    key: string;
-    value: string;
-    size: number;
-    isSensitive: boolean;
-}
-
-export const StorageIndicator = () => {
-    const [localItems, setLocalItems] = useState<StorageItem[]>([]);
-    const [sessionItems, setSessionItems] = useState<StorageItem[]>([]);
-    const [isExpanded, setIsExpanded] = useState(false);
-
-    const SENSITIVE_PATTERNS = ['key', 'mnemonic', 'seed', 'private', 'secret', 'pgp', 'password'];
-
-    const isSensitiveKey = (key: string): boolean => {
-        const lowerKey = key.toLowerCase();
-        return SENSITIVE_PATTERNS.some(pattern => lowerKey.includes(pattern));
-    };
-
-    const getStorageItems = (storage: Storage): StorageItem[] => {
-        const items: StorageItem[] = [];
-        for (let i = 0; i < storage.length; i++) {
-            const key = storage.key(i);
-            if (key) {
-                const value = storage.getItem(key) || '';
-                items.push({
-                    key,
-                    value: value.substring(0, 50) + (value.length > 50 ? '...' : ''),
-                    size: new Blob([value]).size,
-                    isSensitive: isSensitiveKey(key)
-                });
-            }
-        }
-        return items.sort((a, b) => (b.isSensitive ? 1 : 0) - (a.isSensitive ? 1 : 0));
-    };
-
-    const refreshStorage = () => {
-        setLocalItems(getStorageItems(localStorage));
-        setSessionItems(getStorageItems(sessionStorage));
-    };
-
-    useEffect(() => {
-        refreshStorage();
-        const interval = setInterval(refreshStorage, 2000);
-        return () => clearInterval(interval);
-    }, []);
-
-    const totalItems = localItems.length + sessionItems.length;
-    const sensitiveCount = [...localItems, ...sessionItems].filter(i => i.isSensitive).length;
-
-    return (
-        <div className="fixed bottom-4 right-4 z-50 max-w-md">
-            <div className={`bg-white rounded-lg shadow-lg border-2 ${sensitiveCount > 0 ? 'border-red-400' : 'border-gray-300'
-                } transition-all duration-200`}>
-
-                {/* Header Bar */}
-                <div
-                    className={`px-4 py-3 rounded-t-lg cursor-pointer flex items-center justify-between ${sensitiveCount > 0 ? 'bg-red-50' : 'bg-gray-50'
-                        } hover:opacity-90 transition-opacity`}
-                    onClick={() => setIsExpanded(!isExpanded)}
-                >
-                    <div className="flex items-center gap-2">
-                        <span className="text-lg">🗄️</span>
-                        <span className="font-semibold text-sm text-gray-700">Storage Monitor</span>
-                    </div>
-
-                    <div className="flex items-center gap-2">
-                        {sensitiveCount > 0 && (
-                            <span className="text-xs bg-red-500 text-white px-2 py-0.5 rounded-full font-medium">
-                                {sensitiveCount}⚠️
-                            </span>
-                        )}
-                        <span className={`text-xs px-2 py-0.5 rounded-full font-medium ${totalItems > 0 ? 'bg-blue-100 text-blue-700' : 'bg-green-100 text-green-700'
-                            }`}>
-                            {totalItems === 0 ? '✓ Empty' : `${totalItems} item${totalItems !== 1 ? 's' : ''}`}
-                        </span>
-                        <span className="text-gray-400 text-sm">{isExpanded ? '▼' : '▶'}</span>
-                    </div>
-                </div>
-
-                {/* Expanded Content */}
-                {isExpanded && (
-                    <div className="p-4 max-h-96 overflow-y-auto">
-                        {sensitiveCount > 0 && (
-                            <div className="mb-3 bg-yellow-50 border border-yellow-300 rounded-md p-3 text-xs">
-                                <div className="flex items-start gap-2">
-                                    <span className="text-yellow-600 mt-0.5">⚠️</span>
-                                    <div className="text-yellow-800">
-                                        <strong>Security Notice:</strong> Sensitive data persists in browser storage
-                                        (survives refresh/restart). Clear manually if on shared device.
-                                    </div>
-                                </div>
-                            </div>
-                        )}
-
-                        <div className="space-y-3">
-                            <StorageSection title="localStorage" items={localItems} icon="💾" />
-                            <StorageSection title="sessionStorage" items={sessionItems} icon="⏱️" />
-                        </div>
-
-                        {totalItems === 0 && (
-                            <div className="text-center py-6">
-                                <div className="text-4xl mb-2">✅</div>
-                                <p className="text-sm text-gray-500">No data in browser storage</p>
-                            </div>
-                        )}
-                    </div>
-                )}
-            </div>
-        </div>
-    );
-};
-
-const StorageSection = ({ title, items, icon }: { title: string; items: StorageItem[]; icon: string }) => {
-    if (items.length === 0) return null;
-
-    return (
-        <div>
-            <h4 className="text-xs font-bold text-gray-500 mb-2 flex items-center gap-1">
-                <span>{icon}</span>
-                <span className="uppercase">{title}</span>
-                <span className="ml-auto text-gray-400 font-normal">({items.length})</span>
-            </h4>
-            <div className="space-y-2">
-                {items.map((item) => (
-                    <div
-                        key={item.key}
-                        className={`text-xs rounded-md border p-2 ${item.isSensitive
-                                ? 'bg-red-50 border-red-300'
-                                : 'bg-gray-50 border-gray-200'
-                            }`}
-                    >
-                        <div className="flex justify-between items-start gap-2 mb-1">
-                            <span className={`font-mono font-semibold text-[11px] break-all ${item.isSensitive ? 'text-red-700' : 'text-gray-700'
-                                }`}>
-                                {item.isSensitive && '🔴 '}{item.key}
-                            </span>
-                            <span className="text-gray-400 text-[10px] whitespace-nowrap">{item.size}B</span>
-                        </div>
-                        <div className="text-gray-500 font-mono text-[10px] break-all leading-relaxed opacity-70">
-                            {item.value}
-                        </div>
-                    </div>
-                ))}
-            </div>
-        </div>
-    );
-};

src/components/badges/ClipboardBadge.tsx

@@ -0,0 +1,39 @@
+import React from 'react';
+import { Clipboard } from 'lucide-react';
+
+interface ClipboardEvent {
+    timestamp: Date;
+    field: string;
+    length: number;
+}
+
+interface ClipboardBadgeProps {
+  events: ClipboardEvent[];
+  onOpenClipboardModal: () => void; // New prop
+}
+
+const ClipboardBadge: React.FC<ClipboardBadgeProps> = ({ events, onOpenClipboardModal }) => {
+  const count = events.length;
+
+  // Determine badge style based on clipboard count
+  const badgeStyle = 
+    count === 0 
+      ? "text-green-500 bg-green-500/10 border-green-500/20" // Safe
+      : count < 5
+      ? "text-amber-500 bg-amber-500/10 border-amber-500/30 font-semibold" // Warning
+      : "text-red-500 bg-red-500/10 border-red-500/30 font-bold animate-pulse"; // Danger
+
+  return (
+    <button
+      onClick={onOpenClipboardModal}
+      className={`flex items-center gap-2 px-3 py-1.5 rounded-lg border transition-all hover:scale-105 ${badgeStyle}`}
+    >
+      <Clipboard className="w-3.5 h-3.5" />
+      <span className="text-xs">
+        {count === 0 ? "Empty" : `${count} item${count > 1 ? 's' : ''}`}
+      </span>
+    </button>
+  );
+};
+
+export default ClipboardBadge;

src/components/badges/EditLockBadge.tsx

@@ -0,0 +1,28 @@
+import React from 'react';
+import { Lock, Unlock } from 'lucide-react';
+
+interface EditLockBadgeProps {
+  isLocked: boolean;
+  onToggle: () => void;
+}
+
+const EditLockBadge: React.FC<EditLockBadgeProps> = ({ isLocked, onToggle }) => {
+  return (
+    <button
+      onClick={onToggle}
+      className={`flex items-center gap-2 px-3 py-1.5 rounded-lg border transition-all hover:scale-105 ${
+        isLocked
+          ? 'text-amber-500 bg-amber-500/10 border-amber-500/30 font-semibold'
+          : 'text-green-500 bg-green-500/10 border-green-500/30'
+      }`}
+      title={isLocked ? 'Click to unlock and edit' : 'Click to lock and blur sensitive data'}
+    >
+      {isLocked ? <Lock className="w-3.5 h-3.5" /> : <Unlock className="w-3.5 h-3.5" />}
+      <span className="text-xs font-medium">
+        {isLocked ? 'Locked' : 'Edit'}
+      </span>
+    </button>
+  );
+};
+
+export default EditLockBadge;

src/components/badges/SecurityBadge.tsx

@@ -0,0 +1,20 @@
+import React from 'react';
+import { AlertTriangle } from 'lucide-react';
+
+interface SecurityBadgeProps {
+  onClick: () => void;
+}
+
+const SecurityBadge: React.FC<SecurityBadgeProps> = ({ onClick }) => {
+  return (
+    <button
+      className="flex items-center gap-2 text-amber-500/80 hover:text-amber-500 transition-colors"
+      onClick={onClick}
+    >
+      <AlertTriangle className="w-4 h-4" />
+      <span className="text-xs font-medium">Security Info</span>
+    </button>
+  );
+};
+
+export default SecurityBadge;

src/components/badges/StorageBadge.tsx

@@ -0,0 +1,34 @@
+import React from 'react';
+import { HardDrive } from 'lucide-react';
+
+interface StorageItem {
+    key: string;
+    value: string;
+    size: number;
+    isSensitive: boolean;
+}
+
+interface StorageBadgeProps {
+  localItems: StorageItem[];
+  sessionItems: StorageItem[];
+}
+
+const StorageBadge: React.FC<StorageBadgeProps> = ({ localItems, sessionItems }) => {
+  const totalItems = localItems.length + sessionItems.length;
+  const sensitiveCount = [...localItems, ...sessionItems].filter(i => i.isSensitive).length;
+
+  const status = sensitiveCount > 0 ? 'Warning' : totalItems > 0 ? 'Active' : 'Empty';
+  const colorClass = 
+    status === 'Warning' ? 'text-amber-500/80' : 
+    status === 'Active' ? 'text-teal-500/80' : 
+    'text-green-500/80';
+
+  return (
+    <div className={`flex items-center gap-2 ${colorClass}`}>
+      <HardDrive className="w-4 h-4" />
+      <span className="text-xs font-medium">{status}</span>
+    </div>
+  );
+};
+
+export default StorageBadge;

src/lib/krux.test.ts

@@ -0,0 +1,189 @@
+// Krux KEF tests using Bun test runner
+import { describe, test, expect } from "bun:test";
+import { 
+  encryptToKrux, 
+  decryptFromKrux, 
+  hexToBytes, 
+  bytesToHex, 
+  wrap, 
+  unwrap,
+  KruxCipher 
+} from './krux';
+
+describe('Krux KEF Implementation', () => {
+  // Test basic hex conversion
+  test('hexToBytes and bytesToHex roundtrip', () => {
+    const original = 'Hello, World!';
+    const bytes = new TextEncoder().encode(original);
+    const hex = bytesToHex(bytes);
+    const back = hexToBytes(hex);
+    expect(new TextDecoder().decode(back)).toBe(original);
+  });
+
+  test('hexToBytes handles KEF: prefix', () => {
+    const hex = '48656C6C6F';
+    const withPrefix = `KEF:${hex}`;
+    const bytes1 = hexToBytes(hex);
+    const bytes2 = hexToBytes(withPrefix);
+    expect(bytes2).toEqual(bytes1);
+  });
+
+  test('hexToBytes rejects invalid hex', () => {
+    expect(() => hexToBytes('12345')).toThrow('Hex string must have even length');
+    expect(() => hexToBytes('12345G')).toThrow('Invalid hex string');
+  });
+
+  // Test wrap/unwrap
+  test('wrap and unwrap roundtrip', () => {
+    const label = 'Test Label';
+    const version = 20;
+    const iterations = 200000;
+    const payload = new TextEncoder().encode('test payload');
+    
+    const wrapped = wrap(label, version, iterations, payload);
+    const unwrapped = unwrap(wrapped);
+    
+    expect(unwrapped.label).toBe(label);
+    expect(unwrapped.version).toBe(version);
+    expect(unwrapped.iterations).toBe(iterations);
+    expect(unwrapped.payload).toEqual(payload);
+  });
+
+  test('wrap rejects label too long', () => {
+    const longLabel = 'a'.repeat(253); // 253 > 252 max
+    const payload = new Uint8Array([1, 2, 3]);
+    
+    expect(() => wrap(longLabel, 20, 10000, payload))
+      .toThrow('Label too long');
+  });
+
+  test('wrap accepts empty label', () => {
+    const payload = new Uint8Array([1, 2, 3]);
+    const wrapped = wrap('', 20, 10000, payload);
+    const unwrapped = unwrap(wrapped);
+    expect(unwrapped.label).toBe('');
+    expect(unwrapped.version).toBe(20);
+    expect(unwrapped.iterations).toBe(10000);
+    expect(unwrapped.payload).toEqual(payload);
+  });
+
+  test('unwrap rejects invalid envelope', () => {
+    expect(() => unwrap(new Uint8Array([1, 2, 3]))).toThrow('Invalid KEF envelope: too short');
+    
+    // Label length too large (253 > 252)
+    expect(() => unwrap(new Uint8Array([253, 20, 0, 0, 100]))).toThrow('Invalid label length');
+    
+    // Empty label (lenId=0) is valid, but need enough data for version+iterations
+    // Create a valid envelope with empty label: [0, version, iter1, iter2, iter3, payload...]
+    const emptyLabelEnvelope = new Uint8Array([0, 20, 0, 0, 100, 1, 2, 3]);
+    const unwrapped = unwrap(emptyLabelEnvelope);
+    expect(unwrapped.label).toBe('');
+    expect(unwrapped.version).toBe(20);
+  });
+
+  // Test encryption/decryption
+  test('encryptToKrux and decryptFromKrux roundtrip', async () => {
+    const mnemonic = 'test test test test test test test test test test test junk';
+    const passphrase = 'secure-passphrase';
+    const label = 'Test Seed';
+    const iterations = 10000;
+    
+    const encrypted = await encryptToKrux({
+      mnemonic,
+      passphrase,
+      label,
+      iterations,
+      version: 20,
+    });
+    
+    expect(encrypted.kefHex).toMatch(/^[0-9A-F]+$/);
+    expect(encrypted.label).toBe(label);
+    expect(encrypted.iterations).toBe(iterations);
+    expect(encrypted.version).toBe(20);
+    
+    const decrypted = await decryptFromKrux({
+      kefHex: encrypted.kefHex,
+      passphrase,
+    });
+    
+    expect(decrypted.mnemonic).toBe(mnemonic);
+    expect(decrypted.label).toBe(label);
+    expect(decrypted.iterations).toBe(iterations);
+    expect(decrypted.version).toBe(20);
+  });
+
+  test('encryptToKrux requires passphrase', async () => {
+    await expect(encryptToKrux({
+      mnemonic: 'test',
+      passphrase: '',
+    })).rejects.toThrow('Passphrase is required');
+  });
+
+  test('decryptFromKrux requires passphrase', async () => {
+    await expect(decryptFromKrux({
+      kefHex: '123456',
+      passphrase: '',
+    })).rejects.toThrow('Passphrase is required');
+  });
+
+  test('wrong passphrase fails decryption', async () => {
+    const mnemonic = 'test mnemonic';
+    const passphrase = 'correct-passphrase';
+    
+    const encrypted = await encryptToKrux({
+      mnemonic,
+      passphrase,
+    });
+    
+    await expect(decryptFromKrux({
+      kefHex: encrypted.kefHex,
+      passphrase: 'wrong-passphrase',
+    })).rejects.toThrow(/Krux decryption failed/);
+  });
+
+  // Test KruxCipher class directly
+  test('KruxCipher encrypt/decrypt roundtrip', async () => {
+    const cipher = new KruxCipher('passphrase', 'salt', 10000);
+    const plaintext = new TextEncoder().encode('secret message');
+    
+    const encrypted = await cipher.encrypt(plaintext);
+    const decrypted = await cipher.decrypt(encrypted, 20);
+    
+    expect(new TextDecoder().decode(decrypted)).toBe('secret message');
+  });
+
+  test('KruxCipher rejects unsupported version', async () => {
+    const cipher = new KruxCipher('passphrase', 'salt', 10000);
+    const plaintext = new Uint8Array([1, 2, 3]);
+    
+    await expect(cipher.encrypt(plaintext, 99)).rejects.toThrow('Unsupported KEF version');
+    await expect(cipher.decrypt(new Uint8Array(50), 99)).rejects.toThrow('Unsupported KEF version');
+  });
+
+  test('KruxCipher rejects short payload', async () => {
+    const cipher = new KruxCipher('passphrase', 'salt', 10000);
+    // Version 20: IV (12) + auth (4) = 16 bytes minimum
+    const shortPayload = new Uint8Array(15); // Too short for IV + GCM tag (needs at least 16)
+    
+    await expect(cipher.decrypt(shortPayload, 20)).rejects.toThrow('Payload too short for AES-GCM');
+  });
+
+  test('iterations scaling works correctly', () => {
+    // Test that iterations are scaled properly when divisible by 10000
+    const label = 'Test';
+    const version = 20;
+    const payload = new Uint8Array([1, 2, 3]);
+    
+    // 200000 should be scaled to 20 in the envelope
+    const wrapped1 = wrap(label, version, 200000, payload);
+    expect(wrapped1[6]).toBe(0); // 200000 / 10000 = 20
+    expect(wrapped1[7]).toBe(0);
+    expect(wrapped1[8]).toBe(20);
+    
+    // 10001 should not be scaled
+    const wrapped2 = wrap(label, version, 10001, payload);
+    const iterStart = 2 + label.length;
+    const iters = (wrapped2[iterStart] << 16) | (wrapped2[iterStart + 1] << 8) | wrapped2[iterStart + 2];
+    expect(iters).toBe(10001);
+  });
+});

src/lib/krux.ts

@@ -0,0 +1,331 @@
+// src/lib/krux.ts
+// Krux KEF (Krux Encryption Format) implementation
+// Compatible with Krux firmware (AES-GCM, label as salt, hex QR)
+// Currently implements version 20 (AES-GCM without compression)
+// Version 21 (AES-GCM +c) support can be added later with compression
+
+// KEF version definitions (matches Python reference)
+export const VERSIONS: Record<number, { 
+  name: string; 
+  compress?: boolean; 
+  auth: number;  // GCM tag length (4 for version 20, full 16 for v1?)
+}> = {
+  20: { name: "AES-GCM", auth: 4 },
+  // Version 21 would be: { name: "AES-GCM +c", compress: true, auth: 4 }
+};
+
+// IV length for GCM mode
+const GCM_IV_LENGTH = 12;
+
+/**
+ * Convert data to a proper ArrayBuffer for Web Crypto API.
+ * Ensures it's not a SharedArrayBuffer.
+ */
+function toArrayBuffer(data: Uint8Array): ArrayBuffer {
+  // Always create a new ArrayBuffer and copy the data
+  const buffer = new ArrayBuffer(data.length);
+  new Uint8Array(buffer).set(data);
+  return buffer;
+}
+
+
+/**
+ * Wrap data into KEF envelope format (matches Python exactly)
+ * Format: [1 byte label length][label bytes][1 byte version][3 bytes iterations][payload]
+ */
+export function wrap(label: string, version: number, iterations: number, payload: Uint8Array): Uint8Array {
+  const labelBytes = new TextEncoder().encode(label);
+  if (!(0 <= labelBytes.length && labelBytes.length <= 252)) {
+    throw new Error("Label too long (max 252 bytes)");
+  }
+  
+  const lenId = new Uint8Array([labelBytes.length]);
+  const versionByte = new Uint8Array([version]);
+  
+  let itersBytes = new Uint8Array(3);
+  // Krux firmware expects iterations in multiples of 10000 when possible
+  if (iterations % 10000 === 0) {
+    const scaled = iterations / 10000;
+    if (!(1 <= scaled && scaled <= 10000)) {
+      throw new Error("Iterations out of scaled range");
+    }
+    itersBytes[0] = (scaled >> 16) & 0xff;
+    itersBytes[1] = (scaled >> 8) & 0xff;
+    itersBytes[2] = scaled & 0xff;
+  } else {
+    if (!(10000 < iterations && iterations < 2**24)) {
+      throw new Error("Iterations out of range");
+    }
+    itersBytes[0] = (iterations >> 16) & 0xff;
+    itersBytes[1] = (iterations >> 8) & 0xff;
+    itersBytes[2] = iterations & 0xff;
+  }
+
+  return new Uint8Array([...lenId, ...labelBytes, ...versionByte, ...itersBytes, ...payload]);
+}
+
+/**
+ * Unwrap KEF envelope to extract components (matches Python exactly)
+ */
+export function unwrap(envelope: Uint8Array): { 
+  label: string; 
+  version: number; 
+  iterations: number; 
+  payload: Uint8Array 
+} {
+  if (envelope.length < 5) {
+    throw new Error("Invalid KEF envelope: too short");
+  }
+  
+  const lenId = envelope[0];
+  if (!(0 <= lenId && lenId <= 252)) {
+    throw new Error("Invalid label length in KEF envelope");
+  }
+  
+  if (1 + lenId + 4 > envelope.length) {
+    throw new Error("Invalid KEF envelope: insufficient data");
+  }
+  
+  const labelBytes = envelope.subarray(1, 1 + lenId);
+  const label = new TextDecoder().decode(labelBytes);
+  const version = envelope[1 + lenId];
+  
+  const iterStart = 2 + lenId;
+  let iters = (envelope[iterStart] << 16) | (envelope[iterStart + 1] << 8) | envelope[iterStart + 2];
+  const iterations = iters <= 10000 ? iters * 10000 : iters;
+  
+  const payload = envelope.subarray(5 + lenId);
+  
+  return { label, version, iterations, payload };
+}
+
+/**
+ * Krux Cipher class for AES-GCM encryption/decryption
+ */
+export class KruxCipher {
+  private keyPromise: Promise<CryptoKey>;
+
+  constructor(passphrase: string, salt: string, iterations: number) {
+    const encoder = new TextEncoder();
+    this.keyPromise = (async () => {
+      // Import passphrase as raw key material
+      const passphraseBytes = encoder.encode(passphrase);
+      const passphraseBuffer = toArrayBuffer(passphraseBytes);
+      
+      const baseKey = await crypto.subtle.importKey(
+        "raw",
+        passphraseBuffer,
+        { name: "PBKDF2" },
+        false,
+        ["deriveKey"]
+      );
+      
+      // Derive AES-GCM key using PBKDF2
+      const saltBytes = encoder.encode(salt);
+      const saltBuffer = toArrayBuffer(saltBytes);
+      
+      return crypto.subtle.deriveKey(
+        {
+          name: "PBKDF2",
+          salt: saltBuffer,
+          iterations: Math.max(1, iterations),
+          hash: "SHA-256"
+        },
+        baseKey,
+        { name: "AES-GCM", length: 256 },
+        false,
+        ["encrypt", "decrypt"]
+      );
+    })();
+  }
+
+  /**
+   * Encrypt plaintext using AES-GCM
+   */
+  async encrypt(plaintext: Uint8Array, version = 20, iv?: Uint8Array): Promise<Uint8Array> {
+    const v = VERSIONS[version];
+    if (!v) {
+      throw new Error(`Unsupported KEF version: ${version}`);
+    }
+
+    // Note: No compression for version 20
+    // For version 21, we would add compression here
+    
+    // Ensure ivBytes is a fresh Uint8Array with its own ArrayBuffer (not SharedArrayBuffer)
+    let ivBytes: Uint8Array;
+    if (iv) {
+      // Copy the iv to ensure we have our own buffer
+      ivBytes = new Uint8Array(iv.length);
+      ivBytes.set(iv);
+    } else {
+      // Create new random IV with a proper ArrayBuffer
+      ivBytes = new Uint8Array(GCM_IV_LENGTH);
+      crypto.getRandomValues(ivBytes);
+    }
+    
+    const key = await this.keyPromise;
+    const plaintextBuffer = toArrayBuffer(plaintext);
+    const ivBuffer = toArrayBuffer(ivBytes);
+    
+    // Use auth length from version definition (in bytes, convert to bits)
+    const tagLengthBits = v.auth * 8;
+    
+    const encrypted = await crypto.subtle.encrypt(
+      { 
+        name: "AES-GCM", 
+        iv: ivBuffer,
+        tagLength: tagLengthBits 
+      },
+      key,
+      plaintextBuffer
+    );
+
+    // For GCM, encrypted result includes ciphertext + tag
+    // Separate ciphertext and tag
+    const authBytes = v.auth;
+    const encryptedBytes = new Uint8Array(encrypted);
+    const ciphertext = encryptedBytes.slice(0, encryptedBytes.length - authBytes);
+    const tag = encryptedBytes.slice(encryptedBytes.length - authBytes);
+    
+    // Combine IV + ciphertext + tag (matches Python format)
+    const combined = new Uint8Array(ivBytes.length + ciphertext.length + tag.length);
+    combined.set(ivBytes, 0);
+    combined.set(ciphertext, ivBytes.length);
+    combined.set(tag, ivBytes.length + ciphertext.length);
+    return combined;
+  }
+
+  /**
+   * Decrypt payload using AES-GCM
+   */
+  async decrypt(payload: Uint8Array, version: number): Promise<Uint8Array> {
+    const v = VERSIONS[version];
+    if (!v) {
+      throw new Error(`Unsupported KEF version: ${version}`);
+    }
+
+    const ivLen = GCM_IV_LENGTH;
+    const authBytes = v.auth;
+    
+    // Payload is IV + ciphertext + tag
+    if (payload.length < ivLen + authBytes) {
+      throw new Error("Payload too short for AES-GCM");
+    }
+    
+    // Extract IV, ciphertext, and tag
+    const iv = payload.slice(0, ivLen);
+    const ciphertext = payload.slice(ivLen, payload.length - authBytes);
+    const tag = payload.slice(payload.length - authBytes);
+    
+    const key = await this.keyPromise;
+
+    try {
+      // For Web Crypto, we need to combine ciphertext + tag
+      const ciphertextWithTag = new Uint8Array(ciphertext.length + tag.length);
+      ciphertextWithTag.set(ciphertext, 0);
+      ciphertextWithTag.set(tag, ciphertext.length);
+      
+      const ciphertextBuffer = toArrayBuffer(ciphertextWithTag);
+      const ivBuffer = toArrayBuffer(iv);
+      
+      const decrypted = await crypto.subtle.decrypt(
+        { 
+          name: "AES-GCM", 
+          iv: ivBuffer,
+          tagLength: authBytes * 8 
+        },
+        key,
+        ciphertextBuffer
+      );
+      
+      return new Uint8Array(decrypted);
+    } catch (error) {
+      // Web Crypto throws generic errors for decryption failure
+      // Convert to user-friendly message
+      throw new Error("Krux decryption failed - wrong passphrase or corrupted data");
+    }
+  }
+}
+
+/**
+ * Convert hex string to bytes
+ */
+export function hexToBytes(hex: string): Uint8Array {
+  // Remove any whitespace and optional KEF: prefix
+  const cleaned = hex.trim().replace(/\s/g, '').replace(/^KEF:/i, '');
+  
+  if (!/^[0-9a-fA-F]+$/.test(cleaned)) {
+    throw new Error("Invalid hex string");
+  }
+  
+  if (cleaned.length % 2 !== 0) {
+    throw new Error("Hex string must have even length");
+  }
+  
+  const bytes = new Uint8Array(cleaned.length / 2);
+  for (let i = 0; i < bytes.length; i++) {
+    bytes[i] = parseInt(cleaned.substr(i * 2, 2), 16);
+  }
+  return bytes;
+}
+
+/**
+ * Convert bytes to hex string
+ */
+export function bytesToHex(bytes: Uint8Array): string {
+  return Array.from(bytes)
+    .map(b => b.toString(16).padStart(2, '0'))
+    .join('')
+    .toUpperCase();
+}
+
+/**
+ * Encrypt mnemonic to KEF format
+ */
+export async function encryptToKrux(params: {
+  mnemonic: string;
+  passphrase: string;
+  label?: string;
+  iterations?: number;
+  version?: number;
+}): Promise<{ kefHex: string; label: string; version: number; iterations: number }> {
+  const label = params.label || "Seed Backup";
+  const iterations = params.iterations || 200000;
+  const version = params.version || 20;
+  
+  if (!params.passphrase) {
+    throw new Error("Passphrase is required for Krux encryption");
+  }
+  
+  const mnemonicBytes = new TextEncoder().encode(params.mnemonic);
+  const cipher = new KruxCipher(params.passphrase, label, iterations);
+  const payload = await cipher.encrypt(mnemonicBytes, version);
+  const kef = wrap(label, version, iterations, payload);
+  
+  return {
+    kefHex: bytesToHex(kef),
+    label,
+    version,
+    iterations
+  };
+}
+
+/**
+ * Decrypt KEF hex to mnemonic
+ */
+export async function decryptFromKrux(params: {
+  kefHex: string;
+  passphrase: string;
+}): Promise<{ mnemonic: string; label: string; version: number; iterations: number }> {
+  if (!params.passphrase) {
+    throw new Error("Passphrase is required for Krux decryption");
+  }
+  
+  const bytes = hexToBytes(params.kefHex);
+  const { label, version, iterations, payload } = unwrap(bytes);
+  const cipher = new KruxCipher(params.passphrase, label, iterations);
+  const decrypted = await cipher.decrypt(payload, version);
+  
+  const mnemonic = new TextDecoder().decode(decrypted);
+  return { mnemonic, label, version, iterations };
+}

src/lib/seedpgp.ts

@@ -1,7 +1,15 @@
 import * as openpgp from "openpgp";
 import { base45Encode, base45Decode } from "./base45";
 import { crc16CcittFalse } from "./crc16";
-import type { SeedPgpPlaintext, ParsedSeedPgpFrame } from "./types";
+import { encryptToKrux, decryptFromKrux, hexToBytes } from "./krux";
+import type { 
+  SeedPgpPlaintext, 
+  ParsedSeedPgpFrame, 
+  EncryptionMode, 
+  EncryptionParams, 
+  DecryptionParams,
+  EncryptionResult 
+} from "./types";
 
 // Configure OpenPGP.js (disable warnings)
 openpgp.config.showComment = false;
@@ -194,3 +202,135 @@ export async function decryptSeedPgp(params: {
 
     return obj;
 }
+
+/**
+ * Unified encryption function supporting both PGP and Krux modes
+ */
+export async function encryptToSeed(params: EncryptionParams): Promise<EncryptionResult> {
+    const mode = params.mode || 'pgp';
+    
+    if (mode === 'krux') {
+        const plaintextStr = typeof params.plaintext === 'string' 
+            ? params.plaintext 
+            : params.plaintext.w;
+            
+        const passphrase = params.messagePassword || '';
+        if (!passphrase) {
+            throw new Error("Krux mode requires a message password (passphrase)");
+        }
+        
+        try {
+            const result = await encryptToKrux({
+                mnemonic: plaintextStr,
+                passphrase,
+                label: params.kruxLabel,
+                iterations: params.kruxIterations,
+                version: params.kruxVersion,
+            });
+            
+            return {
+                framed: result.kefHex,
+                label: result.label,
+                version: result.version,
+                iterations: result.iterations,
+            };
+        } catch (error) {
+            if (error instanceof Error) {
+                throw new Error(`Krux encryption failed: ${error.message}`);
+            }
+            throw error;
+        }
+    }
+    
+    // Default to PGP mode
+    const plaintextObj = typeof params.plaintext === 'string'
+        ? buildPlaintext(params.plaintext, false)
+        : params.plaintext;
+    
+    const result = await encryptToSeedPgp({
+        plaintext: plaintextObj,
+        publicKeyArmored: params.publicKeyArmored,
+        messagePassword: params.messagePassword,
+    });
+    
+    return {
+        framed: result.framed,
+        pgpBytes: result.pgpBytes,
+        recipientFingerprint: result.recipientFingerprint,
+    };
+}
+
+/**
+ * Unified decryption function supporting both PGP and Krux modes
+ */
+export async function decryptFromSeed(params: DecryptionParams): Promise<SeedPgpPlaintext> {
+    const mode = params.mode || 'pgp';
+    
+    if (mode === 'krux') {
+        const passphrase = params.messagePassword || '';
+        if (!passphrase) {
+            throw new Error("Krux mode requires a message password (passphrase)");
+        }
+        
+        try {
+            const result = await decryptFromKrux({
+                kefHex: params.frameText,
+                passphrase,
+            });
+            
+            // Convert to SeedPgpPlaintext format for consistency
+            return {
+                v: 1,
+                t: "bip39",
+                w: result.mnemonic,
+                l: "en",
+                pp: 0,
+            };
+        } catch (error) {
+            if (error instanceof Error) {
+                throw new Error(`Krux decryption failed: ${error.message}`);
+            }
+            throw error;
+        }
+    }
+    
+    // Default to PGP mode
+    return decryptSeedPgp({
+        frameText: params.frameText,
+        privateKeyArmored: params.privateKeyArmored,
+        privateKeyPassphrase: params.privateKeyPassphrase,
+        messagePassword: params.messagePassword,
+    });
+}
+
+/**
+ * Detect encryption mode from input text
+ */
+export function detectEncryptionMode(text: string): EncryptionMode {
+    const trimmed = text.trim();
+    
+    // Check for SEEDPGP1 format
+    if (trimmed.startsWith('SEEDPGP1:')) {
+        return 'pgp';
+    }
+    
+    // Check for hex format (Krux KEF)
+    const cleaned = trimmed.replace(/\s/g, '').replace(/^KEF:/i, '');
+    if (/^[0-9a-fA-F]+$/.test(cleaned) && cleaned.length % 2 === 0) {
+        // Try to parse as KEF to confirm
+        try {
+            const bytes = hexToBytes(cleaned);
+            if (bytes.length >= 5) {
+                const lenId = bytes[0];
+                if (lenId > 0 && lenId <= 252 && 1 + lenId + 4 <= bytes.length) {
+                    return 'krux';
+                }
+            }
+        } catch {
+            // Not valid KEF, fall through
+        }
+    }
+    
+    // Default to PGP for backward compatibility
+    return 'pgp';
+}

src/lib/types.ts

@@ -12,3 +12,39 @@ export type ParsedSeedPgpFrame = {
     crc16: string;
     b45: string;
 };
+
+// Krux KEF types
+export type KruxEncryptionParams = {
+    label?: string;
+    iterations?: number;
+    version?: number;
+};
+
+export type EncryptionMode = 'pgp' | 'krux';
+
+export type EncryptionParams = {
+    plaintext: SeedPgpPlaintext | string;
+    publicKeyArmored?: string;
+    messagePassword?: string;
+    mode?: EncryptionMode;
+    kruxLabel?: string;
+    kruxIterations?: number;
+    kruxVersion?: number;
+};
+
+export type DecryptionParams = {
+    frameText: string;
+    privateKeyArmored?: string;
+    privateKeyPassphrase?: string;
+    messagePassword?: string;
+    mode?: EncryptionMode;
+};
+
+export type EncryptionResult = {
+    framed: string;
+    pgpBytes?: Uint8Array;
+    recipientFingerprint?: string;
+    label?: string;
+    version?: number;
+    iterations?: number;
+};

src/vite-env.d.ts

@@ -8,3 +8,4 @@ declare module '*.css' {
 
 declare const __APP_VERSION__: string;
 declare const __BUILD_HASH__: string;
+declare const __BUILD_TIMESTAMP__: string;

vite.config.ts

@@ -11,8 +11,16 @@ const appVersion = packageJson.version
 const gitHash = execSync('git rev-parse --short HEAD').toString().trim()
 
 export default defineConfig({
-  plugins: [react()],
+  plugins: [
-  base: process.env.CF_PAGES ? '/' : '/seedpgp-web-app/',
+    react(),
+    {
+      name: 'html-transform',
+      transformIndexHtml(html) {
+        return html.replace(/__APP_VERSION__/g, appVersion);
+      }
+    }
+  ],
+  base: '/',  // Always use root, since we're Cloudflare Pages only
   publicDir: 'public',  // ← Explicitly set (should be default)
   build: {
     outDir: 'dist',
@@ -21,5 +29,6 @@ export default defineConfig({
   define: {
     '__APP_VERSION__': JSON.stringify(appVersion),
     '__BUILD_HASH__': JSON.stringify(gitHash),
+    '__BUILD_TIMESTAMP__': JSON.stringify(new Date().toISOString()),
   }
 })