feat: rename app to Wallet Generator and add wallet save to disk

- Rename app to 'Wallet Generator' (index.html, window title, sidebar, package.json)
- Add ~/.wallet-generator/wallet/ as save directory for all generated wallets
- Add save-wallet and get-wallet-dir IPC handlers in Electron main process
- Expose saveWallet/getWalletDir via preload contextBridge
- HDWallet: save JSON to disk with optional encryption, show saved path
- SingleAddress: add Save card with editable filename for all address types

frontend/electron/main.cjs

@@ -2,12 +2,20 @@ const { app, BrowserWindow, ipcMain, shell } = require('electron')
 const path = require('path')
 const { execFile } = require('child_process')
 const fs = require('fs')
+const os = require('os')
 
 const isDev = process.env.NODE_ENV === 'development'
 const VITE_PORT = 5173
 
 let mainWindow = null
 
+// ── Wallet storage directory ───────────────────────────────────────────────────
+const WALLET_DIR = path.join(os.homedir(), '.wallet-generator', 'wallet')
+
+function ensureWalletDir() {
+  fs.mkdirSync(WALLET_DIR, { recursive: true })
+}
+
 // ── Resolve Python executable ──────────────────────────────────────────────────
 function findPython() {
   const repoRoot = path.join(__dirname, '..', '..')
@@ -21,9 +29,8 @@ function callPython(command, args = {}) {
     const python = findPython()
     const repoRoot = path.join(__dirname, '..', '..')
     const cliPath = path.join(repoRoot, 'src', 'cli.py')
-    const argsJson = JSON.stringify(args)
 
-    execFile(python, [cliPath, command, argsJson], { cwd: repoRoot }, (err, stdout, stderr) => {
+    execFile(python, [cliPath, command, JSON.stringify(args)], { cwd: repoRoot }, (err, stdout, stderr) => {
       if (err) { reject(new Error(stderr || err.message)); return }
       try {
         const result = JSON.parse(stdout.trim())
@@ -46,6 +53,18 @@ ipcMain.handle('p2sh',        (_, args) => callPython('p2sh',        args))
 ipcMain.handle('p2wpkh',      (_, args) => callPython('p2wpkh',      args))
 ipcMain.handle('p2tr',        (_, args) => callPython('p2tr',        args))
 
+ipcMain.handle('save-wallet', (_, { filename, data }) => {
+  ensureWalletDir()
+  const filePath = path.join(WALLET_DIR, filename)
+  fs.writeFileSync(filePath, JSON.stringify(data, null, 2), 'utf-8')
+  return filePath
+})
+
+ipcMain.handle('get-wallet-dir', () => {
+  ensureWalletDir()
+  return WALLET_DIR
+})
+
 // ── Create window ──────────────────────────────────────────────────────────────
 function createWindow() {
   mainWindow = new BrowserWindow({
@@ -53,7 +72,7 @@ function createWindow() {
     height: 750,
     minWidth: 900,
     minHeight: 600,
-    title: 'Bitcoin Address Generator',
+    title: 'Wallet Generator',
     backgroundColor: '#0f1117',
     webPreferences: {
       nodeIntegration: false,

frontend/electron/preload.cjs

@@ -1,12 +1,14 @@
 const { contextBridge, ipcRenderer } = require('electron')
 
 contextBridge.exposeInMainWorld('electronAPI', {
-  hdGenerate: (args) => ipcRenderer.invoke('hd-generate', args),
+  hdGenerate:   (args) => ipcRenderer.invoke('hd-generate', args),
-  hdEncrypt:  (args) => ipcRenderer.invoke('hd-encrypt',  args),
+  hdEncrypt:    (args) => ipcRenderer.invoke('hd-encrypt',  args),
-  hdDecrypt:  (args) => ipcRenderer.invoke('hd-decrypt',  args),
+  hdDecrypt:    (args) => ipcRenderer.invoke('hd-decrypt',  args),
-  p2pk:       (args) => ipcRenderer.invoke('p2pk',        args),
+  p2pk:         (args) => ipcRenderer.invoke('p2pk',        args),
-  p2pkh:      (args) => ipcRenderer.invoke('p2pkh',       args),
+  p2pkh:        (args) => ipcRenderer.invoke('p2pkh',       args),
-  p2sh:       (args) => ipcRenderer.invoke('p2sh',        args),
+  p2sh:         (args) => ipcRenderer.invoke('p2sh',        args),
-  p2wpkh:     (args) => ipcRenderer.invoke('p2wpkh',      args),
+  p2wpkh:       (args) => ipcRenderer.invoke('p2wpkh',      args),
-  p2tr:       (args) => ipcRenderer.invoke('p2tr',        args),
+  p2tr:         (args) => ipcRenderer.invoke('p2tr',        args),
+  saveWallet:   (filename, data) => ipcRenderer.invoke('save-wallet', { filename, data }),
+  getWalletDir: ()     => ipcRenderer.invoke('get-wallet-dir'),
 })

frontend/index.html

@@ -4,7 +4,7 @@
     <meta charset="UTF-8" />
     <link rel="icon" type="image/svg+xml" href="/icons/bitcoin.svg" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-    <title>Bitcoin Address Generator</title>
+    <title>Wallet Generator</title>
   </head>
   <body>
     <div id="root"></div>

frontend/package.json

@@ -1,5 +1,5 @@
 {
-  "name": "bitcoin-address-generator",
+  "name": "wallet-generator",
   "private": true,
   "version": "1.0.0",
   "type": "module",

frontend/src/components/HDWallet.jsx

@@ -51,14 +51,10 @@ export default function HDWallet() {
       if (savePassword.trim()) {
         data = await window.electronAPI.hdEncrypt({ wallet, password: savePassword })
       }
-      const blob = new Blob([JSON.stringify(data, null, 2)], { type: 'application/json' })
+      const filename = `wallet_${form.network}_${form.bip_type}_${Date.now()}.json`
-      const url = URL.createObjectURL(blob)
+      const savedPath = await window.electronAPI.saveWallet(filename, data)
-      const a = document.createElement('a')
+      const encrypted = savePassword ? ' (encrypted)' : ''
-      a.href = url
+      setSaveMsg(`Saved${encrypted}: ${savedPath}`)
-      a.download = `wallet_${form.network}_${form.bip_type}.json`
-      a.click()
-      URL.revokeObjectURL(url)
-      setSaveMsg(savePassword ? 'Wallet saved (encrypted).' : 'Wallet saved (unencrypted).')
     } catch (e) {
       setSaveMsg('Error: ' + e.message)
     } finally {

frontend/src/components/Sidebar.jsx

@@ -17,7 +17,7 @@ export default function Sidebar({ active, onSelect }) {
           <circle cx="14" cy="14" r="14" fill="#f7931a"/>
           <path d="M18.5 11.8c.3-1.9-1.2-2.9-3.2-3.6l.7-2.6-1.6-.4-.6 2.5c-.4-.1-.9-.2-1.3-.3l.6-2.5-1.6-.4-.7 2.6-1-.3-2.2-.5-.4 1.7s1.2.3 1.1.3c.6.1.7.5.7.8l-1.7 6.9c-.1.2-.3.5-.8.4.0 0-1.1-.3-1.1-.3l-.8 1.8 2.1.5.9.3-.7 2.7 1.6.4.7-2.6c.4.1.9.2 1.3.3l-.7 2.6 1.6.4.7-2.7c2.9.5 5.1.3 6-2.3.7-2.1-.0-3.3-1.5-4.1 1.1-.3 1.9-1 2.1-2.5zm-3.8 5.3c-.5 2-3.9 1-5 .7l.9-3.5c1.1.3 4.7.8 4.1 2.8zm.5-5.3c-.5 1.8-3.3 1-4.3.7l.8-3.2c1 .3 4.1.7 3.5 2.5z" fill="white"/>
         </svg>
-        <span>BTC Generator</span>
+        <span>Wallet Generator</span>
       </div>
 
       <nav className="sidebar-nav">

frontend/src/components/SingleAddress.jsx

@@ -18,18 +18,24 @@ export default function SingleAddress({ initialTab = 'p2pkh' }) {
   const [result, setResult] = useState(null)
   const [loading, setLoading] = useState(false)
   const [error, setError] = useState(null)
+  const [filename, setFilename] = useState('')
+  const [saving, setSaving] = useState(false)
+  const [saveMsg, setSaveMsg] = useState(null)
 
   const generate = async () => {
     setLoading(true)
     setError(null)
     setResult(null)
+    setSaveMsg(null)
     try {
       let args = { network }
       if (tab === 'p2sh') args = { ...args, m, n, compressed }
       else if (tab !== 'p2tr') args = { ...args, compressed }
 
-      const fn = window.electronAPI[tab === 'p2pkh' ? 'p2pkh' : tab === 'p2wpkh' ? 'p2wpkh' : tab === 'p2tr' ? 'p2tr' : tab === 'p2pk' ? 'p2pk' : 'p2sh']
+      const fn = window.electronAPI[tab]
-      setResult(await fn(args))
+      const data = await fn(args)
+      setResult(data)
+      setFilename(`${tab}_${network}_${Date.now()}`)
     } catch (e) {
       setError(e.message)
     } finally {
@@ -37,6 +43,21 @@ export default function SingleAddress({ initialTab = 'p2pkh' }) {
     }
   }
 
+  const save = async () => {
+    if (!result) return
+    setSaving(true)
+    setSaveMsg(null)
+    try {
+      const name = (filename.trim() || `${tab}_${network}`) + '.json'
+      const savedPath = await window.electronAPI.saveWallet(name, result)
+      setSaveMsg(`Saved: ${savedPath}`)
+    } catch (e) {
+      setSaveMsg('Error: ' + e.message)
+    } finally {
+      setSaving(false)
+    }
+  }
+
   const currentTab = TABS.find(t => t.id === tab)
 
   return (
@@ -46,13 +67,12 @@ export default function SingleAddress({ initialTab = 'p2pkh' }) {
 
       <div className="tabs">
         {TABS.map(t => (
-          <button key={t.id} className={`tab${tab === t.id ? ' active' : ''}`} onClick={() => { setTab(t.id); setResult(null); setError(null) }}>
+          <button key={t.id} className={`tab${tab === t.id ? ' active' : ''}`} onClick={() => { setTab(t.id); setResult(null); setError(null); setSaveMsg(null) }}>
             {t.label}
           </button>
         ))}
       </div>
 
-      {/* ── Form ── */}
       <div className="card">
         <div className="card-title">{currentTab.label} <span style={{ color: 'var(--text-xs)', fontWeight: 400 }}>— {currentTab.desc}</span></div>
 
@@ -95,20 +115,47 @@ export default function SingleAddress({ initialTab = 'p2pkh' }) {
 
       {error && <div className="alert alert-error">{error}</div>}
 
-      {result && <ResultCard result={result} tab={tab} />}
+      {result && (
+        <>
+          <ResultCard result={result} tab={tab} />
+
+          <div className="card">
+            <div className="card-title">Save</div>
+            <div className="form-grid" style={{ marginBottom: 12 }}>
+              <div className="form-group">
+                <label className="form-label">Filename</label>
+                <input
+                  className="form-input"
+                  placeholder={`${tab}_${network}`}
+                  value={filename}
+                  onChange={e => setFilename(e.target.value)}
+                />
+                <span className="form-hint">.json · saved to ~/.wallet-generator/wallet/</span>
+              </div>
+            </div>
+            <button className="btn btn-secondary" onClick={save} disabled={saving}>
+              {saving ? <><span className="spinner" style={{borderTopColor:'var(--text)'}} /> Saving…</> : '💾 Save JSON'}
+            </button>
+            {saveMsg && (
+              <div className={`alert ${saveMsg.startsWith('Error') ? 'alert-error' : 'alert-success'}`} style={{ marginTop: 12, marginBottom: 0 }}>
+                {saveMsg}
+              </div>
+            )}
+          </div>
+        </>
+      )}
     </div>
   )
 }
 
 function ResultCard({ result, tab }) {
-  const fields = buildFields(result, tab)
   return (
     <div className="card">
       <div className="card-title">Result</div>
       {tab === 'p2sh' ? (
         <P2SHResult result={result} />
       ) : (
-        fields.map(([label, value]) => (
+        buildFields(result).map(([label, value]) => (
           <div className="kv-row" key={label}>
             <span className="kv-label">{label}</span>
             <span className="kv-value">{value}</span>
@@ -120,7 +167,7 @@ function ResultCard({ result, tab }) {
   )
 }
 
-function buildFields(result, tab) {
+function buildFields(result) {
   const rows = [
     ['Network', result.network],
     ['Script type', result.script_type],