chore: Bump version to 1.4.3

GEMINI.md

@@ -2,7 +2,7 @@
 
 ## Project Overview
 
-**SeedPGP v1.4.2**: Client-side BIP39 mnemonic encryption webapp  
+**SeedPGP v1.4.3**: Client-side BIP39 mnemonic encryption webapp  
 **Stack**: Bun + Vite + React + TypeScript + OpenPGP.js + Tailwind CSS  
 **Deploy**: GitHub Pages (public repo: `seedpgp-web-app`, private source: `seedpgp-web`)  
 **Live URL**: <https://kccleoc.github.io/seedpgp-web-app/>
@@ -130,9 +130,23 @@ bun run preview       # Preview production build
 
 ### Deployment Process
 
-1. **Private repo** (`seedpgp-web`): Source code, development
-2. **Public repo** (`seedpgp-web-app`): Built files for GitHub Pages
-3. **Deploy script** (`scripts/deploy.sh`): Builds + copies to dist/ + pushes to public repo
+**Production:** Cloudflare Pages (auto-deploys from `main` branch)  
+**Live URL:** <https://seedpgp-web.pages.dev>
+
+### Cloudflare Pages Setup
+
+1. **Repository:** `seedpgp-web` (private repo)
+2. **Build command:** `bun run build`
+3. **Output directory:** `dist/`
+4. **Security headers:** Automatically enforced via `public/_headers`
+
+### Benefits Over GitHub Pages
+
+- ✅ Real CSP header enforcement (blocks network requests at browser level)
+- ✅ Custom security headers (X-Frame-Options, X-Content-Type-Options)
+- ✅ Auto-deploy on push to main
+- ✅ Build preview for PRs
+- ✅ Better performance (global CDN)
 
 ### Git Workflow
 
@@ -141,10 +155,19 @@ bun run preview       # Preview production build
 git add src/
 git commit -m "feat(v1.x): description"
 
-# Tag version
+# Tag version (triggers auto-deploy to Cloudflare)
 git tag v1.x.x
 git push origin main --tags
 
+# **IMPORTANT: Update README.md before tagging**
+# Update the following sections in README.md:
+# - Current version number in header
+# - Recent Changes section with new features
+# - Any new usage instructions or screenshots
+# Then commit the README update:
+git add README.md
+git commit -m "docs: update README for v1.x.x"
+
 # Deploy to GitHub Pages
 ./scripts/deploy.sh v1.x.x
 ```
@@ -291,7 +314,7 @@ await window.runSessionCryptoTest()
 
 ---
 
-## Current Version: v1.4.2
+## Current Version: v1.4.3
 
 *Please update the "Recent Changes", "Known Limitations", and "Next Priorities" sections to reflect the current state of the project.*
 
@@ -353,7 +376,6 @@ Check:
 Output: ✅ or ❌ for each item + suggest fixes for failures.
 ```
 
-
 ---
 
 **Last Updated**: 2026-01-29