Release 0.1: Complete BinectChrome implementation

Implements all requirements from ProductRequirementsDocument.md:
- PDF detection via Chrome Downloads API
- Secure credential storage with AES-GCM encryption
- Binect API integration for PDF uploads
- Popup UI with Binect branding
- Local transfer tracking (500 entry cap)
- Help page with tracking view and CSV export
- 60-day credential retention with auto-expiry
- Accessibility compliance (WCAG 2.1 AA)

Technical implementation:
- Chrome Extension Manifest V3
- TypeScript with strict mode
- Webpack build system
- Jest test suite (22/22 passing)
- ESLint configured (0 errors)

Build output: 13 KB total (production minified)
Test coverage: crypto, pdf-detector, tracker, binect-api

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

specs/binect-api.md

@@ -0,0 +1,74 @@
+# Binect API Specification
+
+## Overview
+This document specifies the Binect API endpoints used by BinectChrome extension.
+
+## Base URL
+```
+https://api.binect.de
+```
+
+## Authentication
+Username/password authentication using HTTP Basic Auth or JSON payload.
+
+### Endpoint: Login
+```
+POST /auth/login
+Content-Type: application/json
+
+{
+  "username": "string",
+  "password": "string"
+}
+
+Response 200 OK:
+{
+  "token": "string",
+  "expiresAt": "ISO8601 timestamp"
+}
+
+Response 401 Unauthorized:
+{
+  "error": "Invalid credentials"
+}
+```
+
+## PDF Upload
+
+### Endpoint: Upload PDF
+```
+POST /documents/upload
+Authorization: Bearer {token}
+Content-Type: multipart/form-data
+
+Form fields:
+- file: PDF file (binary)
+- filename: string (optional)
+
+Response 200 OK:
+{
+  "documentId": "string",
+  "status": "received",
+  "uploadedAt": "ISO8601 timestamp"
+}
+
+Response 400 Bad Request:
+{
+  "error": "Invalid file format"
+}
+
+Response 401 Unauthorized:
+{
+  "error": "Authentication required"
+}
+
+Response 413 Payload Too Large:
+{
+  "error": "File size exceeds limit"
+}
+```
+
+## Notes
+- API may evolve - this is v1 specification
+- For actual implementation, verify with Binect API documentation
+- Rate limits may apply