baseline: 批次A-D 成果 + membership 半成品（测试红）

backend/apps/printing/models.py

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+"""打印中心模型：PrintSettings（租户抬头）+ PrintTemplate（单据模板）。"""
+
+from django.db import models
+
+from apps.core.base_models import TenantScopedModel
+
+
+class PrintSettings(TenantScopedModel):
+    """租户打印抬头（单例：每租户一条，code 固定 default）。"""
+
+    company_name = models.CharField(max_length=128, blank=True, default="")
+    phone = models.CharField(max_length=64, blank=True, default="")
+    address = models.CharField(max_length=255, blank=True, default="")
+    bank_info = models.CharField(max_length=255, blank=True, default="", help_text="开户行/账号")
+    footer_note = models.CharField(max_length=255, blank=True, default="", help_text="页脚备注（如：货已验收，概不退换）")
+    logo_url = models.URLField(blank=True, default="")
+
+    class Meta:
+        db_table = "printing_settings"
+        verbose_name_plural = "打印抬头"
+        ordering = ["id"]
+
+    def __str__(self):
+        return f"{self.company_name or '未设置抬头'}"
+
+
+class PrintTemplate(TenantScopedModel):
+    """打印模板（用户可编辑的 HTML 片段，使用安全占位符语法）。
+
+    doc_type: sales_bill / purchase_bill
+    语法：{{path}} 取值、{{#each lines}}…{{/each}} 行循环（循环内用 {{item.xxx}}）。
+    自研占位符渲染，不走 Django 模板引擎，杜绝模板注入。
+    """
+
+    DOC_TYPE_CHOICES = [
+        ("sales_bill", "销售单/送货单"),
+        ("purchase_bill", "采购单/进货单"),
+    ]
+
+    code = models.CharField(max_length=64, help_text="模板代码（租户内唯一）")
+    name = models.CharField(max_length=128)
+    doc_type = models.CharField(max_length=32, choices=DOC_TYPE_CHOICES)
+    body_html = models.TextField(help_text="模板正文（安全占位符语法）")
+    paper_size = models.CharField(max_length=16, default="A4")
+    is_default = models.BooleanField(default=False, help_text="该单据类型的默认模板")
+
+    class Meta:
+        db_table = "printing_template"
+        unique_together = [("tenant", "code")]
+        verbose_name_plural = "打印模板"
+        ordering = ["doc_type", "code"]
+
+    def __str__(self):
+        return f"[{self.doc_type}] {self.code}"