feat: 實作銷售單匯入管理、貨道扣庫優化及 UI 細節調整

app/Modules/Sales/Controllers/SalesImportController.php

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+<?php
+
+namespace App\Modules\Sales\Controllers;
+
+use App\Http\Controllers\Controller;
+use App\Modules\Sales\Models\SalesImportBatch;
+use App\Modules\Sales\Imports\SalesImport;
+use App\Modules\Inventory\Services\InventoryService; // Assuming this exists or we need to use ProductService
+use Illuminate\Http\Request;
+use Inertia\Inertia;
+use Maatwebsite\Excel\Facades\Excel;
+use Illuminate\Support\Facades\DB;
+
+class SalesImportController extends Controller
+{
+    public function index(Request $request)
+    {
+        $perPage = $request->input('per_page', 10);
+
+        $batches = SalesImportBatch::with('importer')
+            ->orderByDesc('created_at')
+            ->paginate($perPage)
+            ->withQueryString();
+
+        return Inertia::render('Sales/Import/Index', [
+            'batches' => $batches,
+            'filters' => [
+                'per_page' => $perPage,
+            ],
+        ]);
+    }
+
+    public function create()
+    {
+        return Inertia::render('Sales/Import/Create');
+    }
+
+    public function store(Request $request)
+    {
+        $request->validate([
+            'file' => 'required|file|mimes:xlsx,xls,csv,zip',
+        ]);
+
+        DB::transaction(function () use ($request) {
+            $batch = SalesImportBatch::create([
+                'import_date' => now(),
+                'imported_by' => auth()->id(),
+                'status' => 'pending',
+                'tenant_id' => tenant('id'), // If tenant context requires it, but usually automatic
+            ]);
+
+            Excel::import(new SalesImport($batch), $request->file('file'));
+        });
+
+        return redirect()->route('sales-imports.index')->with('success', '匯入成功，請確認內容。');
+    }
+
+    public function show(Request $request, SalesImportBatch $import)
+    {
+        $import->load(['items', 'importer']);
+        
+        $perPage = $request->input('per_page', 10);
+        
+        return Inertia::render('Sales/Import/Show', [
+            'import' => $import,
+            'items' => $import->items()->with(['product', 'warehouse'])->paginate($perPage)->withQueryString(),
+            'filters' => [
+                'per_page' => $perPage,
+            ],
+        ]);
+    }
+
+    public function confirm(SalesImportBatch $import, InventoryService $inventoryService)
+    {
+        if ($import->status !== 'pending') {
+            return back()->with('error', '此批次無法確認。');
+        }
+
+        DB::transaction(function () use ($import, $inventoryService) {
+            // 1. Prepare Aggregation
+            $aggregatedDeductions = []; // Key: "warehouse_id:product_id:slot"
+            
+            // Pre-load necessary warehouses for matching
+            $machineIds = $import->items->pluck('machine_id')->filter()->unique();
+            $warehouses = \App\Modules\Inventory\Models\Warehouse::whereIn('code', $machineIds)->get()->keyBy('code');
+
+            foreach ($import->items as $item) {
+                // Only process shipped items with a valid product
+                if ($item->product_id && $item->original_status === '已出貨') {
+                    // Resolve Warehouse from Machine ID
+                    $warehouse = $warehouses->get($item->machine_id);
+                    
+                    // Skip if machine_id is empty or warehouse not found
+                    if (!$warehouse) {
+                        continue;
+                    }
+
+                    // Aggregation Key includes Slot (貨道)
+                    $slot = $item->slot ?: '';
+                    $key = "{$warehouse->id}:{$item->product_id}:{$slot}";
+                    
+                    if (!isset($aggregatedDeductions[$key])) {
+                        $aggregatedDeductions[$key] = [
+                            'warehouse_id' => $warehouse->id,
+                            'product_id' => $item->product_id,
+                            'slot' => $slot,
+                            'quantity' => 0,
+                            'details' => []
+                        ];
+                    }
+                    
+                    $aggregatedDeductions[$key]['quantity'] += $item->quantity;
+                    $aggregatedDeductions[$key]['details'][] = $item->transaction_serial;
+                }
+            }
+
+            // 2. Execute Aggregated Deductions
+            foreach ($aggregatedDeductions as $deduction) {
+                // Construct a descriptive reason
+                $serialCount = count($deduction['details']);
+                $reason = "銷售出貨彙總 (批號: {$import->id}, 貨道: {$deduction['slot']}, 共 {$serialCount} 筆交易)";
+                
+                $inventoryService->decreaseStock(
+                    $deduction['product_id'],
+                    $deduction['warehouse_id'],
+                    $deduction['quantity'],
+                    $reason,
+                    true, // Force deduction
+                    $deduction['slot'] // Location/Slot
+                );
+            }
+
+            // 3. Update Batch Status
+            $import->update([
+                'status' => 'confirmed',
+                'confirmed_at' => now(),
+            ]);
+        });
+
+        return redirect()->route('sales-imports.index')->with('success', '已彙總（含貨道）並扣除庫存。');
+    }
+
+    public function destroy(SalesImportBatch $import)
+    {
+        if ($import->status !== 'pending') {
+            return back()->with('error', '只能刪除待確認的批次。');
+        }
+
+        $import->delete();
+        return redirect()->route('sales-imports.index')->with('success', '已刪除匯入批次。');
+    }
+}

app/Modules/Sales/Imports/SalesImport.php

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+<?php
+
+namespace App\Modules\Sales\Imports;
+
+use App\Modules\Sales\Models\SalesImportBatch;
+use Maatwebsite\Excel\Concerns\WithMultipleSheets;
+
+class SalesImport implements WithMultipleSheets
+{
+    protected $batch;
+
+    public function __construct(SalesImportBatch $batch)
+    {
+        $this->batch = $batch;
+    }
+
+    public function sheets(): array
+    {
+        // Only import the first sheet (index 0)
+        return [
+            0 => new SalesImportSheet($this->batch),
+        ];
+    }
+}

app/Modules/Sales/Imports/SalesImportSheet.php

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+<?php
+
+namespace App\Modules\Sales\Imports;
+
+use App\Modules\Sales\Models\SalesImportBatch;
+use App\Modules\Sales\Models\SalesImportItem;
+use App\Modules\Inventory\Models\Product;
+use Illuminate\Support\Collection;
+use Maatwebsite\Excel\Concerns\ToCollection;
+use Maatwebsite\Excel\Concerns\WithStartRow;
+use Carbon\Carbon;
+
+class SalesImportSheet implements ToCollection, WithStartRow
+{
+    protected $batch;
+    protected $products;
+
+    public function __construct(SalesImportBatch $batch)
+    {
+        $this->batch = $batch;
+        // Pre-load all products to minimize queries (keyed by code)
+        $this->products = Product::pluck('id', 'code'); // assumes code is unique
+    }
+
+    public function startRow(): int
+    {
+        return 3;
+    }
+
+    public function collection(Collection $rows)
+    {
+        $totalQuantity = 0;
+        $totalAmount = 0;
+        $items = [];
+
+        foreach ($rows as $row) {
+            // Index mapping based on analysis:
+            // 0: 銷貨單號 (Serial)
+            // 1: 機台編號 (Machine ID)
+            // 4: 訂單狀態 (Original Status)
+            // 7: 產品代號 (Product Code)
+            // 9: 銷貨日期 (Transaction At)
+            // 11: 金額 (Amount)
+            // 19: 貨道 (Slot)
+            // Quantity default to 1
+
+            $serial = $row[0];
+            $machineId = $row[1];
+            $originalStatus = $row[4];
+            $productCode = $row[7];
+            $transactionAt = $row[9];
+            $amount = $row[11];
+            $slot = $row[19] ?? null;
+            
+            // Skip empty rows
+            if (empty($serial) && empty($productCode)) {
+                continue;
+            }
+
+            // Parse Date
+            try {
+                // Formatting might be needed depending on Excel date format
+                $transactionAt = Carbon::parse($transactionAt);
+            } catch (\Exception $e) {
+                $transactionAt = now();
+            }
+
+            $quantity = 1; // Default
+            
+            // Clean amount (remove comma etc if needed)
+            $amount = is_numeric($amount) ? $amount : 0;
+
+            $items[] = [
+                'batch_id' => $this->batch->id,
+                'machine_id' => $machineId,
+                'slot' => $slot,
+                'product_code' => $productCode,
+                'product_id' => $this->products[$productCode] ?? null,
+                'transaction_at' => $transactionAt,
+                'transaction_serial' => $serial,
+                'quantity' => (int)$quantity,
+                'amount' => $amount,
+                'original_status' => $originalStatus,
+                'created_at' => now(),
+                'updated_at' => now(),
+            ];
+
+            $totalQuantity += $quantity;
+            $totalAmount += $amount;
+        }
+
+        // Bulk insert items (chunk if necessary, but assuming reasonable size)
+        foreach (array_chunk($items, 1000) as $chunk) {
+            SalesImportItem::insert($chunk);
+        }
+
+        // Update Batch Totals
+        // Increment totals instead of overwriting, in case we decide to process multiple sheets later?
+        // But for now, since we only process sheet 0, overwriting or incrementing is fine.
+        // Given we strictly return [0 => ...], only one sheet runs.
+        $this->batch->update([
+            'total_quantity' => $totalQuantity,
+            'total_amount' => $totalAmount,
+        ]);
+    }
+}

app/Modules/Sales/Models/SalesImportBatch.php

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+<?php
+
+namespace App\Modules\Sales\Models;
+
+use App\Modules\Core\Models\User;
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+use Illuminate\Database\Eloquent\Relations\HasMany;
+
+class SalesImportBatch extends Model
+{
+    use HasFactory;
+
+    protected $table = 'sales_import_batches';
+
+    protected $fillable = [
+        'import_date',
+        'total_quantity',
+        'total_amount',
+        'status',
+        'imported_by',
+        'confirmed_at',
+        'note',
+    ];
+
+    protected $casts = [
+        'import_date' => 'date',
+        'confirmed_at' => 'datetime',
+        'total_quantity' => 'decimal:4',
+        'total_amount' => 'decimal:4',
+    ];
+
+    public function items(): HasMany
+    {
+        return $this->hasMany(SalesImportItem::class, 'batch_id');
+    }
+
+    public function importer(): BelongsTo
+    {
+        return $this->belongsTo(User::class, 'imported_by');
+    }
+}

app/Modules/Sales/Models/SalesImportItem.php

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+<?php
+
+namespace App\Modules\Sales\Models;
+
+use App\Modules\Inventory\Models\Product;
+use App\Modules\Inventory\Models\Warehouse;
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+
+class SalesImportItem extends Model
+{
+    use HasFactory;
+
+    protected $table = 'sales_import_items';
+
+    protected $fillable = [
+        'batch_id',
+        'machine_id',
+        'slot',
+        'product_code',
+        'product_id',
+        'transaction_at',
+        'transaction_serial',
+        'quantity',
+        'amount',
+        'original_status',
+    ];
+
+    protected $casts = [
+        'transaction_at' => 'datetime',
+        'quantity' => 'integer',
+        'amount' => 'decimal:4',
+        'original_status' => 'string',
+    ];
+
+    public function batch(): BelongsTo
+    {
+        return $this->belongsTo(SalesImportBatch::class, 'batch_id');
+    }
+
+    public function product(): BelongsTo
+    {
+        return $this->belongsTo(Product::class, 'product_id');
+    }
+
+    public function warehouse(): BelongsTo
+    {
+        return $this->belongsTo(Warehouse::class, 'machine_id', 'code');
+    }
+}

app/Modules/Sales/Routes/web.php

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+<?php
+
+use Illuminate\Support\Facades\Route;
+use App\Modules\Sales\Controllers\SalesImportController;
+
+Route::middleware(['auth', 'verified'])->prefix('sales')->name('sales-imports.')->group(function () {
+    Route::get('/imports', [SalesImportController::class, 'index'])->name('index');
+    Route::get('/imports/create', [SalesImportController::class, 'create'])->name('create');
+    Route::post('/imports', [SalesImportController::class, 'store'])->name('store');
+    Route::get('/imports/{import}', [SalesImportController::class, 'show'])->name('show');
+    Route::post('/imports/{import}/confirm', [SalesImportController::class, 'confirm'])->name('confirm');
+    Route::delete('/imports/{import}', [SalesImportController::class, 'destroy'])->name('destroy');
+});