Rebuild as single-file offline BIP84 wallet

Replace the SvelteKit/daisyUI prototype with a vanilla JS + hand-rolled CSS
app that Bun bundles (code + scure/noble crypto + QR + CSS) into one
self-contained dist/index.html runnable offline from file://.

Wallet core (src/wallet.js):
- BIP84 native-segwit HD wallet from BIP39 seed (+optional passphrase)
- gap-limit scan of receive/change chains, aggregate balance, tx history
- fresh receive/change addresses; signs with witnessUtxo only (enables
  offline signing with no prev-tx fetch)
- coin selection + fee estimation via btc-signer selectUTXO; send-max;
  manual coin control
- offline JSON snapshot export/import (keyless) + signed-tx hex/QR export
- realtime mempool.space WebSocket: track-addresses -> debounced auto
  refresh of balances/history (no polling); live status badge

UI (src/app.js): clean light paper-wallet; create (with optional, skippable
backup verification) / import flow; receive (QR) / send / history / coins /
tools tabs; clickable logo returns home.

API (src/api.js): mempool.space wrapper with retry/backoff for scan-burst
rate limiting; single network choke-point for offline enforcement.

Verified: BIP84 spec vectors, build/sign/parse for auto/max/manual flows,
snapshot roundtrip, live scan + WebSocket, headless-Chrome UI smoke tests.

Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>

1 files changed, 19 insertions, 40 deletions

diff --git a/package.json b/package.json
index e31f2fc..9e38e24 100644
--- a/package.json
+++ b/package.json
@@ -1,42 +1,21 @@
 {
-	"name": "cold2",
-	"private": true,
-	"version": "0.0.1",
-	"type": "module",
-	"scripts": {
-		"dev": "vite dev",
-		"build": "vite build",
-		"preview": "vite preview",
-		"prepare": "svelte-kit sync || echo ''",
-		"check": "svelte-kit sync && svelte-check --tsconfig ./tsconfig.json",
-		"check:watch": "svelte-kit sync && svelte-check --tsconfig ./tsconfig.json --watch",
-		"format": "prettier --write .",
-		"lint": "prettier --check ."
-	},
-	"devDependencies": {
-		"@sveltejs/adapter-auto": "^6.0.0",
-		"@sveltejs/kit": "^2.22.0",
-		"@sveltejs/vite-plugin-svelte": "^6.0.0",
-		"@tailwindcss/forms": "^0.5.9",
-		"@tailwindcss/typography": "^0.5.15",
-		"@tailwindcss/vite": "^4.0.0",
-		"prettier": "^3.4.2",
-		"prettier-plugin-svelte": "^3.3.3",
-		"prettier-plugin-tailwindcss": "^0.6.11",
-		"svelte": "^5.0.0",
-		"svelte-check": "^4.0.0",
-		"tailwindcss": "^4.0.0",
-		"typescript": "^5.0.0",
-		"vite": "^7.0.4"
-	},
-	"dependencies": {
-		"@iconify/iconify": "^3.1.1",
-		"@scure/base": "^1.2.6",
-		"@scure/bip32": "^1.7.0",
-		"@scure/bip39": "^1.6.0",
-		"@scure/btc-signer": "^1.8.1",
-		"@sveltejs/adapter-static": "^3.0.8",
-		"daisyui": "^5.0.46",
-		"iconify-icon": "^3.0.0"
-	}
+  "name": "bitcoin-wallet",
+  "private": true,
+  "version": "0.1.0",
+  "type": "module",
+  "description": "Offline-capable, single-file BIP84 HD Bitcoin wallet for the browser",
+  "scripts": {
+    "dev": "bun run dev.js",
+    "build": "bun run build.js"
+  },
+  "dependencies": {
+    "@scure/base": "^1.2.6",
+    "@scure/bip32": "^1.7.0",
+    "@scure/bip39": "^1.6.0",
+    "@scure/btc-signer": "^1.8.1",
+    "qrcode-generator": "^2.0.4"
+  },
+  "devDependencies": {
+    "puppeteer-core": "^25.1.0"
+  }
 }