Deck cost calculator: BTC denomination + a full materials checklist

- Currency picker now offers BOTH Bitcoin units — ₿ sats and ₿ BTC (plus fiat).
  BTC is 1 per BTC, sats 1e8; switching converts between them and fiats
  (BTC shows up to 8 decimals, trimmed).
- Default Materials is now a complete deck-build checklist, grouped: wood & core
  (veneer/edge tape/logs), adhesives & fillers (glue/epoxy/filler), press/mold
  consumables (release/vacuum film), shaping (sandpaper/saw+drill bits/masking
  tape), finish & graphics (stain/primer/paint/clearcoat/grip) and Other. New
  rows default to 0 so the worked example is unchanged.

AGENTS.md

@@ -821,7 +821,8 @@ session with **no other memory of this project**. So:
   labour, equipment amortisation, operations, materials, process time, packaging
   and margin → selling price; the `deckCost` card links to it. **Currency
   (2026-10-05):** a **searchable currency selector** (Popover + search) covering
-  ~sats + every fiat Coinbase reports, and switching **converts every money field**
+  **sats + BTC** (both Bitcoin units) and every **fiat** Coinbase reports (crypto
+  is filtered out via `FIAT_CODES`), and switching **converts every money field**
   using live BTC rates (`useBtcRates` → `getBtcRates`, one Coinbase
   `exchange-rates?currency=BTC` call — all currencies, `sats` = 1e8; unitless
   fields are untouched). Falls back to relabel-only when rates are unavailable.
@@ -836,7 +837,10 @@ session with **no other memory of this project**. So:
   (lazy-loaded `jspdf`) — a formatted summary of every section + the selling
   price; the reason it's a real PDF and not print-to-PDF is that
   `window.print()` doesn't work in the Capacitor WebView. A secondary **JSON**
-  export remains (for Import/backup); Import reads JSON. Next: write our own
+  export remains (for Import/backup); Import reads JSON. The default **Materials**
+  list is a full deck-build checklist (veneer/edge tape/logs, glue/epoxy/filler,
+  mold release/vacuum film, sandpaper/saw+drill bits/masking tape, stain/primer/
+  paint/clearcoat/grip). Next: write our own
   step-by-step guides (NIP-23 `30023` with `t=diy`) to flip the coming-soon cards
   live.
 - **App Shop** (`/app-shop`, `src/pages/AppShopPage.tsx`): SkateSpots merch, to be

src/components/DeckCostCalculator.tsx

@@ -52,15 +52,35 @@ const FIAT_CODES = new Set([
   'ZAR', 'ZMW',
 ]);
 
-/** How a currency is shown: `$1.00`, `CHF 1.00`, `1,000 sats`. */
+/** How a currency is shown: `$1.00`, `CHF 1.00`, `1,000 sats`, `0.00012345 BTC`. */
 function formatMoney(v: number, cur: string): string {
   if (cur === 'sats') return `${Math.round(v).toLocaleString()} sats`;
+  if (cur === 'BTC') {
+    const str = v.toFixed(8).replace(/0+$/, '').replace(/\.$/, '');
+    return `${str || '0'} BTC`;
+  }
   const s = CURRENCY_SYMBOLS[cur];
   const n = v.toFixed(2);
   if (!s) return `${cur} ${n}`;
   return /[A-Za-z]/.test(s) ? `${s} ${n}` : `${s}${n}`;
 }
 
+/** Bitcoin is one asset shown two ways — `sats` and `BTC` are both offered. */
+const BITCOIN_UNITS: Record<string, number> = { sats: 1e8, BTC: 1 };
+
+/** Units of a currency per 1 BTC (sats/BTC = fixed; fiats come from rates). */
+function ratePerBtc(cur: string, rates?: Record<string, number>): number | undefined {
+  return BITCOIN_UNITS[cur] ?? rates?.[cur];
+}
+
+/** Chip/trigger label, e.g. `₿ sats`, `₿ BTC`, `$ USD`. */
+function currencyLabel(cur: string): string {
+  if (cur === 'sats') return '₿ sats';
+  if (cur === 'BTC') return '₿ BTC';
+  const s = CURRENCY_SYMBOLS[cur];
+  return s ? `${s} ${cur}` : cur;
+}
+
 interface CalcState {
   currency: CurrencyCode;
   hourlyRate: number;
@@ -101,13 +121,28 @@ const DEFAULT_CALC: CalcState = {
     { id: uid(), name: 'Other Equipment', cost: 0, setupHrs: 0, boards: 100000 },
   ],
   materials: [
-    { id: uid(), name: 'Veneer', orderCost: 1500, shipping: 500, boards: 200, orderMin: 15, unloadMin: 120 },
+    // Wood & core
-    { id: uid(), name: 'Glue', orderCost: 35, shipping: 0, boards: 10, orderMin: 20, unloadMin: 0 },
+    { id: uid(), name: 'Veneer (maple plies)', orderCost: 1500, shipping: 500, boards: 200, orderMin: 15, unloadMin: 120 },
+    { id: uid(), name: 'Veneer tape / edge tape', orderCost: 0, shipping: 0, boards: 100, orderMin: 5, unloadMin: 0 },
+    { id: uid(), name: 'Logs (if milling your own veneer)', orderCost: 80, shipping: 0, boards: 500, orderMin: 0, unloadMin: 0 },
+    // Adhesives & fillers
+    { id: uid(), name: 'Wood glue / epoxy resin', orderCost: 35, shipping: 0, boards: 10, orderMin: 20, unloadMin: 0 },
+    { id: uid(), name: 'Wood filler / putty', orderCost: 0, shipping: 0, boards: 50, orderMin: 0, unloadMin: 0 },
+    // Press / mold consumables
+    { id: uid(), name: 'Mold release / wax paper', orderCost: 0, shipping: 0, boards: 100, orderMin: 0, unloadMin: 0 },
+    { id: uid(), name: 'Vacuum bag / breather film', orderCost: 0, shipping: 0, boards: 200, orderMin: 0, unloadMin: 0 },
+    // Shaping consumables
     { id: uid(), name: 'Sandpaper', orderCost: 30, shipping: 0, boards: 100, orderMin: 5, unloadMin: 15 },
-    { id: uid(), name: 'Bits', orderCost: 50, shipping: 0, boards: 500, orderMin: 5, unloadMin: 0 },
+    { id: uid(), name: 'Saw blades', orderCost: 20, shipping: 0, boards: 500, orderMin: 5, unloadMin: 0 },
-    { id: uid(), name: 'Saw Blades', orderCost: 20, shipping: 0, boards: 500, orderMin: 5, unloadMin: 0 },
+    { id: uid(), name: 'Drill bits / router bits', orderCost: 50, shipping: 0, boards: 500, orderMin: 5, unloadMin: 0 },
-    { id: uid(), name: 'Logs', orderCost: 80, shipping: 0, boards: 500, orderMin: 0, unloadMin: 0 },
+    { id: uid(), name: 'Masking tape', orderCost: 0, shipping: 0, boards: 100, orderMin: 0, unloadMin: 0 },
-    { id: uid(), name: 'Other (inks, coatings, etc.)', orderCost: 0, shipping: 0, boards: 50, orderMin: 5, unloadMin: 0 },
+    // Finish & graphics
+    { id: uid(), name: 'Stain / dye', orderCost: 0, shipping: 0, boards: 50, orderMin: 0, unloadMin: 0 },
+    { id: uid(), name: 'Primer / base coat', orderCost: 0, shipping: 0, boards: 50, orderMin: 0, unloadMin: 0 },
+    { id: uid(), name: 'Paint / screen-print ink', orderCost: 0, shipping: 0, boards: 50, orderMin: 0, unloadMin: 0 },
+    { id: uid(), name: 'Clearcoat / lacquer', orderCost: 0, shipping: 0, boards: 50, orderMin: 0, unloadMin: 0 },
+    { id: uid(), name: 'Grip tape', orderCost: 0, shipping: 0, boards: 50, orderMin: 0, unloadMin: 0 },
+    { id: uid(), name: 'Other (hardware, coatings, etc.)', orderCost: 0, shipping: 0, boards: 50, orderMin: 5, unloadMin: 0 },
   ],
   processes: [
     { id: uid(), name: 'Glue & Press', minutes: 20, boards: 3 },
@@ -154,7 +189,7 @@ export function DeckCostCalculator() {
     const fiat = rates
       ? Object.keys(rates).filter((c) => FIAT_CODES.has(c)).sort()
       : ['USD', 'EUR', 'GBP'];
-    return ['sats', ...fiat];
+    return ['sats', 'BTC', ...fiat];
   }, [rates]);
   const filteredCurrencies = query
     ? currencies.filter((c) => c.toLowerCase().includes(query.toLowerCase()))
@@ -167,11 +202,14 @@ export function DeckCostCalculator() {
     setQuery('');
     setS((prev) => {
       if (to === prev.currency) return prev;
-      const rf = prev.currency === 'sats' ? 1e8 : rates?.[prev.currency];
+      const rf = ratePerBtc(prev.currency, rates);
-      const rt = to === 'sats' ? 1e8 : rates?.[to];
+      const rt = ratePerBtc(to, rates);
       if (!rf || !rt) return { ...prev, currency: to }; // no rate → relabel only
       const k = rt / rf;
-      const r2 = (v: number) => (to === 'sats' ? Math.round(v * k) : Math.round(v * k * 100) / 100);
+      const r2 = (v: number) =>
+        to === 'sats' ? Math.round(v * k)
+          : to === 'BTC' ? Math.round(v * k * 1e8) / 1e8
+            : Math.round(v * k * 100) / 100;
       return {
         ...prev,
         currency: to,
@@ -276,7 +314,7 @@ export function DeckCostCalculator() {
     setText(17, true, 15); doc.text('SkateSpots — Deck cost calculator', M, y + 8); y += 26;
     setText(9, false, 120);
     doc.text(
-      `${new Date().toLocaleDateString(dateLocaleCode(), { year: 'numeric', month: 'long', day: 'numeric' })}  ·  ${cur === 'sats' ? 'sats (Bitcoin)' : cur}`,
+      `${new Date().toLocaleDateString(dateLocaleCode(), { year: 'numeric', month: 'long', day: 'numeric' })}  ·  ${cur === 'sats' ? 'sats (Bitcoin)' : cur === 'BTC' ? 'BTC (Bitcoin)' : cur}`,
       M, y,
     );
     y += 10;
@@ -390,7 +428,7 @@ export function DeckCostCalculator() {
               type="button"
               className="flex min-h-0 items-center gap-2 rounded-full border border-[#ccff00]/40 bg-[#ccff00]/10 px-3 py-1.5 text-xs font-bold text-[#ccff00] hover:bg-[#ccff00]/15"
             >
-              {cur === 'sats' ? '₿ sats' : `${CURRENCY_SYMBOLS[cur] ?? ''} ${cur}`.trim()}
+              {currencyLabel(cur)}
               <ChevronDown className="h-3.5 w-3.5" />
             </button>
           </PopoverTrigger>
@@ -416,7 +454,7 @@ export function DeckCostCalculator() {
                     c === cur ? 'bg-[#ccff00]/15 text-[#ccff00]' : 'text-gray-300 hover:bg-white/5',
                   )}
                 >
-                  <span>{c === 'sats' ? '₿ sats' : `${CURRENCY_SYMBOLS[c] ?? ''} ${c}`.trim()}</span>
+                  <span>{currencyLabel(c)}</span>
                   {c === cur && <Check className="h-3.5 w-3.5" />}
                 </button>
               ))}