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, 0 insertions, 19 deletions

diff --git a/src/routes/+layout.svelte b/src/routes/+layout.svelte
deleted file mode 100644
index fe115b3..0000000
--- a/src/routes/+layout.svelte
+++ /dev/null
@@ -1,19 +0,0 @@
-<script lang="ts">
-	import '../app.css';
-
-	let { children } = $props();
-</script>
-
-<div
-	class="container mx-auto max-w-3xl space-y-5 rounded-2xl bg-gray-100 p-8 text-xl shadow-lg"
-	data-theme="light"
->
-	<div class="flex items-center justify-center gap-2">
-		<img src="/bitcoin.svg" />
-		<div>
-			<a href="/" class="mx-auto text-2xl">Adamant</a>
-		</div>
-	</div>
-
-	{@render children()}
-</div>