docs: Remove GitHub Pages deployment instructions from GEMINI.md

GEMINI.md

@@ -12,8 +12,7 @@
 1. **Security-first**: Never persist secrets (mnemonic/passphrase/private keys) to localStorage/sessionStorage/IndexedDB
 2. **Small PRs**: Max 1-5 files per feature; propose plan before coding
 3. **Client-side only**: No backend; all crypto runs in browser (Web Crypto API + OpenPGP.js)
-4. **GitHub Pages deploy**: Base path `/seedpgp-web-app/` configured in vite.config.ts
-5. **Honest security claims**: Don't overclaim what client-side JS can guarantee
+4. **Honest security claims**: Don't overclaim what client-side JS can guarantee
 
 ## Non-Negotiables
 
@@ -30,7 +29,7 @@
 ### Entry Points
 
 - `src/main.tsx` → `src/App.tsx` (main application)
-- Build output: `dist/` (separate git repo for GitHub Pages deployment)
+- Build output: `dist/`
 
 ### Directory Structure
 
@@ -125,7 +124,6 @@ bun run dev           # Dev server (localhost:5173)
 bun run build         # Build to dist/
 bun run typecheck     # TypeScript validation (tsc --noEmit)
 bun run preview       # Preview production build
-./scripts/deploy.sh v1.x.x  # Build + push to public repo
 ```
 
 ### Deployment Process
@@ -140,14 +138,6 @@ bun run preview       # Preview production 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
 
 ```bash
@@ -167,9 +157,6 @@ git push origin main --tags
 # 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
 ```
 
 ---
@@ -282,7 +269,6 @@ Before implementing any feature:
 ### Security Claims
 
 - Don't claim "RAM is wiped" (JavaScript can't force GC)
-- Don't claim "offline mode" without real CSP headers (GitHub Pages can't set custom headers)
 - Don't promise protection against active browser compromise (XSS/extensions)
 
 ### Storage