docs: update public README for v1.2.0

public/README.md

@@ -33,7 +33,7 @@ Client-side web application for encrypting cryptocurrency seed phrases (BIP39 mn
 ### For Maximum Security
 
 For production use with real funds:
-- 🏠 Download and run locally (`bun run dev`)
+- 🏠 Download and run locally (\`bun run dev\`)
 - 🔐 Use on airgapped device
 - 📥 Self-host on your own domain
 - 🔍 Source code: https://github.com/kccleoc/seedpgp-web (private)
@@ -68,14 +68,14 @@ For production use with real funds:
 
 ## 📋 Protocol Format
 
-```
+\`\`\`
 SEEDPGP1:0:ABCD:BASE45DATA
 
 SEEDPGP1 - Protocol identifier + version
 0        - Frame number (single frame)
 ABCD     - CRC16-CCITT-FALSE checksum
 BASE45   - Base45-encoded OpenPGP binary message
-```
+\`\`\`
 
 ## 🔐 Encryption Details
 
@@ -119,6 +119,3 @@ BASE45   - Base45-encoded OpenPGP binary message
 **Built with** ❤️ using TypeScript, React, Vite, and OpenPGP.js
 
 **License**: Private source code - deployment only
-
-
-🚀