chore: bump version to 2.22.1 and update changelog

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

CHANGELOG.md

@@ -2,6 +2,15 @@
 
 All notable changes to iNTERCEPT will be documented in this file.
 
+## [2.22.1] - 2026-02-23
+
+### Fixed
+- PWA install prompt not appearing — manifest now includes required PNG icons (192×192, 512×512)
+- Apple touch icon updated to PNG for iOS Safari compatibility
+- Service worker cache bumped to bust stale cached assets
+
+---
+
 ## [2.22.0] - 2026-02-23
 
 ### Added

config.py

@@ -7,12 +7,12 @@ import os
 import sys
 
 # Application version
-VERSION = "2.22.0"
+VERSION = "2.22.1"
 
 # Changelog - latest release notes (shown on welcome screen)
 CHANGELOG = [
     {
-        "version": "2.22.0",
+        "version": "2.22.1",
         "date": "February 2026",
         "highlights": [
             "Waterfall receiver overhaul: WebSocket I/Q streaming with server-side FFT, click-to-tune, and zoom controls",