Release v1.0.0 - Major security upgrade with Argon2id encryption

- Upgrade vault encryption from PBKDF2 (1000 iterations) to Argon2id
  (256MB memory, 8 iterations, 4 threads, ~3 second derivation)
- Add automatic migration from v1 to v2 vault format on unlock
- Add WebAssembly CSP support for hash-wasm Argon2id implementation
- Add NIP-42 relay authentication support for auth-required relays
- Add profile edit feature with pencil icon on identity page
- Add direct NIP-05 validation (removes NDK dependency for validation)
- Add deriving modal with progress timer during key derivation
- Add client tag "plebeian-signer" to profile events
- Fix modal colors (dark theme for visibility)
- Fix NIP-05 badge styling to include check/error indicator
- Add release zip packages for Chrome and Firefox

New files:
- projects/common/src/lib/helpers/argon2-crypto.ts
- projects/common/src/lib/helpers/websocket-auth.ts
- projects/common/src/lib/helpers/nip05-validator.ts
- projects/common/src/lib/components/deriving-modal/
- projects/{chrome,firefox}/src/app/components/profile-edit/
- releases/plebeian-signer-{chrome,firefox}-v1.0.0.zip

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

projects/common/src/lib/helpers/argon2-crypto.ts

@@ -0,0 +1,150 @@
+/**
+ * Secure vault encryption/decryption using Argon2id + AES-GCM
+ *
+ * - Argon2id key derivation with ~3 second computation time
+ * - AES-256-GCM authenticated encryption
+ * - Random 32-byte salt per vault
+ * - Random 12-byte IV per encryption
+ *
+ * Note: Uses main thread for Argon2id (via WebAssembly) because Web Workers
+ * in browser extensions cannot load external scripts due to CSP restrictions.
+ * The deriving modal provides user feedback during the ~3 second derivation.
+ */
+
+import { argon2id } from 'hash-wasm';
+import { Buffer } from 'buffer';
+
+// Argon2id parameters tuned for ~3 second derivation on typical hardware
+const ARGON2_CONFIG = {
+  parallelism: 4, // 4 threads
+  iterations: 8, // Time cost
+  memorySize: 262144, // 256 MB memory
+  hashLength: 32, // 256-bit key for AES-256
+  outputType: 'binary' as const,
+};
+
+/**
+ * Derive an encryption key from password using Argon2id
+ * @param password - User's password
+ * @param salt - Random 32-byte salt
+ * @returns 32-byte derived key
+ */
+export async function deriveKeyArgon2(
+  password: string,
+  salt: Uint8Array
+): Promise<Uint8Array> {
+  // Use hash-wasm's argon2id (WebAssembly-based, runs on main thread)
+  // This blocks the UI for ~3 seconds, which is why we show a modal
+  const result = await argon2id({
+    password: password,
+    salt: salt,
+    ...ARGON2_CONFIG,
+  });
+  return result;
+}
+
+/**
+ * Generate a random salt for Argon2id
+ * @returns Base64 encoded 32-byte salt
+ */
+export function generateSalt(): string {
+  const salt = crypto.getRandomValues(new Uint8Array(32));
+  return Buffer.from(salt).toString('base64');
+}
+
+/**
+ * Generate a random IV for AES-GCM
+ * @returns Base64 encoded 12-byte IV
+ */
+export function generateIV(): string {
+  const iv = crypto.getRandomValues(new Uint8Array(12));
+  return Buffer.from(iv).toString('base64');
+}
+
+/**
+ * Encrypt data using Argon2id-derived key + AES-256-GCM
+ * @param plaintext - Data to encrypt
+ * @param password - User's password
+ * @param saltBase64 - Base64 encoded 32-byte salt
+ * @param ivBase64 - Base64 encoded 12-byte IV
+ * @returns Base64 encoded ciphertext
+ */
+export async function encryptWithArgon2(
+  plaintext: string,
+  password: string,
+  saltBase64: string,
+  ivBase64: string
+): Promise<string> {
+  const salt = Buffer.from(saltBase64, 'base64');
+  const iv = Buffer.from(ivBase64, 'base64');
+
+  // Derive key using Argon2id (~3 seconds, in worker)
+  const keyBytes = await deriveKeyArgon2(password, salt);
+
+  // Import key for AES-GCM
+  const key = await crypto.subtle.importKey(
+    'raw',
+    keyBytes,
+    { name: 'AES-GCM' },
+    false,
+    ['encrypt']
+  );
+
+  // Encrypt the data
+  const encoder = new TextEncoder();
+  const encrypted = await crypto.subtle.encrypt(
+    { name: 'AES-GCM', iv: iv },
+    key,
+    encoder.encode(plaintext)
+  );
+
+  return Buffer.from(encrypted).toString('base64');
+}
+
+/**
+ * Decrypt data using Argon2id-derived key + AES-256-GCM
+ * @param ciphertextBase64 - Base64 encoded ciphertext
+ * @param password - User's password
+ * @param saltBase64 - Base64 encoded 32-byte salt
+ * @param ivBase64 - Base64 encoded 12-byte IV
+ * @returns Decrypted plaintext
+ * @throws Error if password is wrong or data is corrupted
+ */
+export async function decryptWithArgon2(
+  ciphertextBase64: string,
+  password: string,
+  saltBase64: string,
+  ivBase64: string
+): Promise<string> {
+  const salt = Buffer.from(saltBase64, 'base64');
+  const iv = Buffer.from(ivBase64, 'base64');
+  const ciphertext = Buffer.from(ciphertextBase64, 'base64');
+
+  // Derive key using Argon2id (~3 seconds, in worker)
+  const keyBytes = await deriveKeyArgon2(password, salt);
+
+  // Import key for AES-GCM
+  const key = await crypto.subtle.importKey(
+    'raw',
+    keyBytes,
+    { name: 'AES-GCM' },
+    false,
+    ['decrypt']
+  );
+
+  // Decrypt
+  let decrypted;
+  try {
+    decrypted = await crypto.subtle.decrypt(
+      { name: 'AES-GCM', iv: iv },
+      key,
+      ciphertext
+    );
+  } catch {
+    throw new Error('Decryption failed - invalid password or corrupted data');
+  }
+
+  const decoder = new TextDecoder();
+  return decoder.decode(decrypted);
+}
+