feat: init backend

src/backend/items/admin.py

@@ -0,0 +1,55 @@
+from django.contrib import admin
+from .models import Item, ItemUsage, Category
+
+
+@admin.register(Item)
+class ItemAdmin(admin.ModelAdmin):
+    list_display = ['name', 'serial_number', 'category', 'status', 'location', 'created_at']
+    list_filter = ['status', 'category', 'created_at']
+    search_fields = ['name', 'serial_number', 'description']
+    readonly_fields = ['created_at', 'updated_at']
+    fieldsets = (
+        ('基本信息', {
+            'fields': ('name', 'description', 'serial_number', 'category')
+        }),
+        ('状态和位置', {
+            'fields': ('status', 'location')
+        }),
+        ('购买信息', {
+            'fields': ('purchase_date', 'value')
+        }),
+        ('系统信息', {
+            'fields': ('created_at', 'updated_at'),
+            'classes': ('collapse',)
+        })
+    )
+
+
+@admin.register(ItemUsage)
+class ItemUsageAdmin(admin.ModelAdmin):
+    list_display = ['item', 'user', 'start_time', 'end_time', 'is_returned', 'purpose']
+    list_filter = ['is_returned', 'start_time', 'item__category']
+    search_fields = ['item__name', 'user__username', 'purpose']
+    readonly_fields = ['created_at']
+    fieldsets = (
+        ('使用信息', {
+            'fields': ('item', 'user', 'purpose', 'notes')
+        }),
+        ('时间信息', {
+            'fields': ('start_time', 'end_time', 'is_returned')
+        }),
+        ('状况记录', {
+            'fields': ('condition_before', 'condition_after')
+        }),
+        ('系统信息', {
+            'fields': ('created_at',),
+            'classes': ('collapse',)
+        })
+    )
+
+
+@admin.register(Category)
+class CategoryAdmin(admin.ModelAdmin):
+    list_display = ['name', 'description', 'created_at']
+    search_fields = ['name', 'description']
+    readonly_fields = ['created_at']