feat: add manual BMS data refresh functionality and expand battery purchase form with accounting fields

src/app/admin/batteries/[id]/page.tsx

@@ -4,7 +4,8 @@ import { useState, use } from 'react';
 import Link from 'next/link';
 import {
   Battery, ArrowLeft, X, BatteryCharging, Activity, Gauge, MapPin, Bike, User, History,
-  Calendar, DollarSign, CheckCircle, Clock, ArrowRightLeft, Handshake, TrendingUp, Edit
+  Calendar, DollarSign, CheckCircle, Clock, ArrowRightLeft, Handshake, TrendingUp, Edit,
+  RefreshCw
 } from 'lucide-react';
 
 interface BMSData {
@@ -127,12 +128,37 @@ export default function BatteryDetailPage({ params }: { params: Promise<{ id: st
   const [battery, setBattery] = useState<Battery>(mockBattery);
   const [activeTab, setActiveTab] = useState<'info' | 'bms' | 'history' | 'rent'>('info');
   const [showEditModal, setShowEditModal] = useState(false);
+  const [refreshing, setRefreshing] = useState(false);
 
   const handleSaveEdit = (updatedBattery: Battery) => {
     setBattery(updatedBattery);
     setShowEditModal(false);
   };
 
+  const handleRefreshBMS = () => {
+    if (!battery.bmsData) return;
+    setRefreshing(true);
+    setTimeout(() => {
+      const bms = battery.bmsData!;
+      setBattery({
+        ...battery,
+        bmsData: {
+          ...bms,
+          voltage: Math.round((60 + Math.random() * 10) * 10) / 10,
+          current: Math.round((-3 + Math.random() * 4) * 10) / 10,
+          soc: Math.floor(Math.random() * 40) + 60,
+          temperature: 25 + Math.floor(Math.random() * 15),
+          cycles: bms.cycles + 1,
+          health: Math.max(70, Math.min(100, bms.health + (Math.random() > 0.7 ? 1 : 0))),
+          timestamp: new Date().toISOString().replace('T', ' ').substring(0, 19)
+        },
+        currentSoc: Math.floor(Math.random() * 40) + 60,
+        health: Math.max(70, Math.min(100, battery.health + (Math.random() > 0.7 ? 1 : 0)))
+      });
+      setRefreshing(false);
+    }, 1000);
+  };
+
   return (
     <div className="p-4 lg:p-6">
       <div className="flex items-center gap-4 mb-6">
@@ -192,11 +218,18 @@ export default function BatteryDetailPage({ params }: { params: Promise<{ id: st
 
         {battery.bmsData && (
           <div className="p-5 border-b border-slate-100 bg-gradient-to-r from-green-50 to-emerald-50">
-            <div className="flex items-center gap-2 mb-3">
+            <div className="flex items-center justify-between mb-3">
-              <Activity className="w-4 h-4 text-green-600" />
+              <div className="flex items-center gap-2">
-              <span className="font-medium text-green-800">Live BMS Data</span>
+                <Activity className="w-4 h-4 text-green-600" />
-              <span className="text-xs text-green-600 bg-green-100 px-2 py-0.5 rounded-full">Real-time</span>
+                <span className="font-medium text-green-800">Live BMS Data</span>
-
+                <span className="text-xs text-green-600 bg-green-100 px-2 py-0.5 rounded-full">Real-time</span>
+              </div>
+              <div className="flex items-center gap-2">
+                <span className="text-xs text-green-600">Updated: {battery.bmsData.timestamp}</span>
+                <button onClick={handleRefreshBMS} disabled={refreshing} className="p-1.5 text-green-600 hover:bg-green-100 rounded-lg">
+                  <RefreshCw className={`w-4 h-4 ${refreshing ? 'animate-spin' : ''}`} />
+                </button>
+              </div>
             </div>
             <div className="grid grid-cols-3 md:grid-cols-6 gap-2">
               <div className="bg-white rounded-lg p-2 text-center">

src/app/admin/batteries/page.tsx

@@ -44,6 +44,9 @@ interface Battery {
   voltage: number;
   purchaseDate: string;
   purchasePrice: number;
+  transactionMethod?: 'cash' | 'bank_transfer' | 'mobile_banking' | 'cheque' | 'credit' | 'other';
+  autoJournal?: boolean;
+  autoJournalSource?: 'supplier' | 'import' | 'internal' | 'transfer' | 'other';
   warrantyExpiry: string;
   status: 'available' | 'in-use' | 'maintenance' | 'retired' | 'charging';
   currentSoc: number;
@@ -879,6 +882,48 @@ function BatteryForm({ battery, onSave, onCancel }: { battery: Battery | null; o
             className="w-full px-3 py-2 border border-slate-200 rounded-lg text-sm focus:outline-none focus:ring-2 focus:ring-accent"
           />
         </div>
+        <div>
+          <label className="block text-sm font-medium text-slate-700 mb-1">Transaction Method</label>
+          <select
+            value={formData.transactionMethod || 'cash'}
+            onChange={(e) => handleChange('transactionMethod', e.target.value as any)}
+            className="w-full px-3 py-2 border border-slate-200 rounded-lg text-sm focus:outline-none focus:ring-2 focus:ring-accent"
+          >
+            <option value="cash">Cash</option>
+            <option value="bank_transfer">Bank Transfer</option>
+            <option value="mobile_banking">Mobile Banking</option>
+            <option value="cheque">Cheque</option>
+            <option value="credit">Credit</option>
+            <option value="other">Other</option>
+          </select>
+        </div>
+        <div className="flex items-center gap-3">
+          <label className="flex items-center gap-2 cursor-pointer">
+            <input
+              type="checkbox"
+              checked={formData.autoJournal || false}
+              onChange={(e) => handleChange('autoJournal', e.target.checked)}
+              className="w-4 h-4 text-accent rounded border-slate-300 focus:ring-accent"
+            />
+            <span className="text-sm text-slate-700">Auto-Journal Entry</span>
+          </label>
+        </div>
+        {formData.autoJournal && (
+          <div>
+            <label className="block text-sm font-medium text-slate-700 mb-1">Auto-Journal Source</label>
+            <select
+              value={formData.autoJournalSource || 'supplier'}
+              onChange={(e) => handleChange('autoJournalSource', e.target.value as any)}
+              className="w-full px-3 py-2 border border-slate-200 rounded-lg text-sm focus:outline-none focus:ring-2 focus:ring-accent"
+            >
+              <option value="supplier">Supplier Purchase</option>
+              <option value="import">Import</option>
+              <option value="internal">Internal Transfer</option>
+              <option value="transfer">Transfer</option>
+              <option value="other">Other</option>
+            </select>
+          </div>
+        )}
         <div>
           <label className="block text-sm font-medium text-slate-700 mb-1">Warranty Expiry</label>
           <input