Implement full V1: diagnostic engine, PSBT construction, and rescue flow

Complete implementation of TxFix — a client-side Bitcoin transaction
diagnostic and rescue tool. Includes AsyncGenerator-based diagnostic
engine (RBF/CPFP/fee analysis), bitcoinjs-lib PSBT construction with
BBQr animated QR delivery, broadcast + live confirmation tracker, and
rescue receipt. Static export for GitHub Pages deployment with CI/CD.

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

Author: SHAcollision

.github/workflows/deploy.yml

@@ -0,0 +1,46 @@
+name: Deploy to GitHub Pages
+
+on:
+  push:
+    branches: [main]
+  workflow_dispatch:
+
+permissions:
+  contents: read
+  pages: write
+  id-token: write
+
+concurrency:
+  group: pages
+  cancel-in-progress: true
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: pnpm/action-setup@v4
+
+      - uses: actions/setup-node@v4
+        with:
+          node-version-file: .nvmrc
+          cache: pnpm
+
+      - run: pnpm install --frozen-lockfile
+
+      - run: pnpm build
+
+      - uses: actions/upload-pages-artifact@v3
+        with:
+          path: out
+
+  deploy:
+    needs: build
+    runs-on: ubuntu-latest
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    steps:
+      - id: deployment
+        uses: actions/deploy-pages@v4

next.config.ts

@@ -1,7 +1,9 @@
 import type { NextConfig } from "next";
 
 const nextConfig: NextConfig = {
-  /* config options here */
+  output: "export",
+  trailingSlash: true,
+  images: { unoptimized: true },
 };
 
 export default nextConfig;

package.json

@@ -9,7 +9,14 @@
     "lint": "eslint"
   },
   "dependencies": {
+    "@bitcoinerlab/secp256k1": "^1.2.0",
+    "bbqr": "^1.2.0",
+    "bitcoinjs-lib": "^7.0.1",
+    "buffer": "^6.0.3",
+    "ecpair": "^3.0.0",
+    "motion": "^12.33.0",
     "next": "16.1.6",
+    "qrcode.react": "^4.2.0",
     "react": "19.2.3",
     "react-dom": "19.2.3"
   },