Stage 6 — Purchase System: partial receipt + supplier analytics

Schema:
- purchase_items.qty_received (backfilled from `received` boolean)
- purchases.warehouse_id (target warehouse FK)
- supplier_part_prices (price history per supplier/part with purchase ref)
- New status `partial` between ordered and received

Purchase ↔ Warehouse integration:
- Purchase::receiveItem(item, qty, warehouse?) — routes through
  WarehouseService::receive: creates batch + receipt event + supplier price row
- Purchase::receiveAllRemaining(warehouse?) — receives all outstanding lines
- Purchase::recomputeStatus() — auto: ordered → partial → received

Old flat markReceived() removed — every receipt now writes batches + ledger.

Filament:
- Purchase list: progress %, partial badge, warehouse picker on form
- ItemsRelationManager: per-line "Recepționează" with qty + warehouse modal,
  qty_received shown as "X.XX / Y.YY" with colour
- PartResource: new PriceHistoryRelationManager (supplier price history)
- SupplierResource: derived columns onTimeRate / avgDeliveryDays / spend(90d)
  + "Rerating" action

Analytics:
- App\Services\Warehouse\SupplierAnalytics (onTimeRate, avgDeliveryDays,
  spend, count, computedRating)
- `suppliers:rate` artisan command + weekly schedule (Mon 04:00)
- Computed rating: 70% on-time + 20% volume + 10% speed bonus

Tests (6 new, all pass):
- Partial receipt of 3/10 → status=partial + 1 batch + 1 price row
- receiveAllRemaining → status=received with received_at set
- Over-receive throws InvalidArgumentException
- Two partial receipts (4+6) → 2 batches FIFO + status=received
- onTimeRate 50% with 1 on-time + 1 late
- computedRating null when <2 deliveries

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

app/Filament/Tenant/Resources/SupplierResource.php

@@ -68,15 +68,56 @@ class SupplierResource extends Resource
                 Tables\Columns\TextColumn::make('rating')
                     ->label('Rating')
                     ->formatStateUsing(fn ($s) => str_repeat('★', (int) $s)),
-                Tables\Columns\TextColumn::make('delivery_days')->label('Livrare (zile)')->alignRight(),
+                Tables\Columns\TextColumn::make('on_time_pct')
+                    ->label('La timp 90d')
+                    ->state(fn (Supplier $r) => app(\App\Services\Warehouse\SupplierAnalytics::class)->onTimeRate($r))
+                    ->formatStateUsing(fn ($s) => $s === null ? '—' : "{$s}%")
+                    ->color(fn ($s) => $s === null ? 'gray' : ($s >= 90 ? 'success' : ($s >= 70 ? 'warning' : 'danger')))
+                    ->alignRight()
+                    ->toggleable(),
+                Tables\Columns\TextColumn::make('avg_delivery_days')
+                    ->label('Avg zile')
+                    ->state(fn (Supplier $r) => app(\App\Services\Warehouse\SupplierAnalytics::class)->avgDeliveryDays($r))
+                    ->formatStateUsing(fn ($s) => $s === null ? '—' : (string) $s)
+                    ->alignRight()
+                    ->toggleable(),
+                Tables\Columns\TextColumn::make('spend_90d')
+                    ->label('Cheltuit 90d')
+                    ->state(fn (Supplier $r) => app(\App\Services\Warehouse\SupplierAnalytics::class)->spend($r))
+                    ->money('MDL')
+                    ->alignRight()
+                    ->toggleable(),
+                Tables\Columns\TextColumn::make('delivery_days')->label('Livrare (zile)')->alignRight()->toggleable(),
                 Tables\Columns\TextColumn::make('discount_pct')->label('Discount')
-                    ->formatStateUsing(fn ($s) => $s . '%')->alignRight(),
+                    ->formatStateUsing(fn ($s) => $s . '%')->alignRight()->toggleable(),
                 Tables\Columns\IconColumn::make('is_active')->boolean(),
             ])
             ->filters([
                 Tables\Filters\TernaryFilter::make('is_active')->label('Activi'),
             ])
             ->actions([
+                Actions\Action::make('rate')
+                    ->label('Rerating')
+                    ->icon('heroicon-m-arrow-path')
+                    ->color('gray')
+                    ->action(function (Supplier $r) {
+                        $score = app(\App\Services\Warehouse\SupplierAnalytics::class)
+                            ->computedRating($r);
+                        if ($score === null) {
+                            \Filament\Notifications\Notification::make()
+                                ->title('Date insuficiente')
+                                ->body('Necesită cel puțin 2 recepții complete cu data așteptată setată.')
+                                ->warning()
+                                ->send();
+                            return;
+                        }
+                        $r->rating = $score;
+                        $r->saveQuietly();
+                        \Filament\Notifications\Notification::make()
+                            ->title("Rating actualizat → {$score}★")
+                            ->success()
+                            ->send();
+                    }),
                 Actions\EditAction::make(),
                 Actions\DeleteAction::make(),
             ])