Release v1.1.3 - Add NIP-49 ncryptsec export feature

- Add ncryptsec page for exporting encrypted private keys (NIP-49)
- Implement password-based encryption using scrypt + XChaCha20-Poly1305
- Display QR code for easy mobile scanning of encrypted key
- Add click-to-copy functionality for ncryptsec string
- Add privkeyToNcryptsec() method to NostrHelper using nostr-tools nip49

Files modified:
- projects/common/src/lib/helpers/nostr-helper.ts
- projects/chrome/src/app/app.routes.ts
- projects/chrome/src/app/components/edit-identity/keys/keys.component.*
- projects/chrome/src/app/components/edit-identity/ncryptsec/ (new)
- projects/firefox/src/app/app.routes.ts
- projects/firefox/src/app/components/edit-identity/keys/keys.component.*
- projects/firefox/src/app/components/edit-identity/ncryptsec/ (new)

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

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

projects/chrome/src/app/components/edit-identity/ncryptsec/ncryptsec.component.html

@@ -0,0 +1,75 @@
+<div class="header-pane">
+  <lib-icon-button
+    icon="chevron-left"
+    (click)="navigateBack()"
+  ></lib-icon-button>
+  <span>Get ncryptsec</span>
+</div>
+
+<p class="description">
+  Enter a password to encrypt your private key. The resulting ncryptsec can be
+  used to securely backup or transfer your key.
+</p>
+
+<!-- PASSWORD INPUT -->
+<div class="password-section">
+  <label for="ncryptsecPasswordInput">Password</label>
+  <div class="input-group sam-mt-h">
+    <input
+      id="ncryptsecPasswordInput"
+      type="password"
+      class="form-control"
+      placeholder="Enter encryption password"
+      [(ngModel)]="ncryptsecPassword"
+      [disabled]="isGenerating"
+      (keyup.enter)="generateNcryptsec()"
+    />
+  </div>
+</div>
+
+<button
+  class="btn btn-primary generate-btn"
+  type="button"
+  (click)="generateNcryptsec()"
+  [disabled]="!ncryptsecPassword || isGenerating"
+>
+  @if (isGenerating) {
+    <span class="spinner-border spinner-border-sm" role="status"></span>
+    Generating...
+  } @else {
+    Generate ncryptsec
+  }
+</button>
+
+<!-- NCRYPTSEC OUTPUT -->
+@if (ncryptsec) {
+<div class="result-section">
+  <!-- QR Code -->
+  <div class="qr-container">
+    <img [src]="ncryptsecQr" alt="ncryptsec QR code" class="qr-code" />
+  </div>
+
+  <!-- ncryptsec text -->
+  <div class="ncryptsec-container">
+    <input
+      type="text"
+      class="form-control ncryptsec-output"
+      [value]="ncryptsec"
+      readonly
+      (click)="copyToClipboard(ncryptsec); toast.show('Copied to clipboard')"
+      title="Click to copy"
+    />
+    <button
+      class="btn btn-outline-secondary"
+      type="button"
+      (click)="copyToClipboard(ncryptsec); toast.show('Copied to clipboard')"
+    >
+      <i class="bi bi-copy"></i> Copy
+    </button>
+  </div>
+
+  <p class="hint">Tap the text or button to copy to clipboard</p>
+</div>
+}
+
+<lib-toast #toast [bottom]="16"></lib-toast>