模板在线编辑与导出链路重构

backend/models/__init__.py

@@ -1,5 +1,6 @@
 from models.template import Template
 from models.paragraph import Paragraph
+from models.template_block import TemplateBlock
 from models.ai_model import AiModel
 from models.document import Document
 from models.generation_log import GenerationLog

backend/models/template_block.py

@@ -0,0 +1,30 @@
+from sqlalchemy import Boolean, Column, DateTime, ForeignKey, Integer, String, Text, func
+
+from database import Base
+
+
+class TemplateBlock(Base):
+    __tablename__ = "template_blocks"
+
+    id = Column(Integer, primary_key=True, autoincrement=True)
+    template_id = Column(Integer, ForeignKey("templates.id"), nullable=False)
+    source_paragraph_id = Column(Integer, ForeignKey("paragraphs.id"), nullable=True)
+    parent_block_id = Column(Integer, ForeignKey("template_blocks.id"), nullable=True)
+    sort_index = Column(Integer, default=0, comment="排序")
+    block_type = Column(String(30), default="text", comment="heading/text/table/ai_slot/variable")
+    anchor_ref = Column(String(500), default="", comment="原始锚点引用")
+    title = Column(String(500), default="", comment="块标题")
+    content_json = Column(Text, default="{}", comment="块内容 JSON")
+    style_json = Column(Text, default="{}", comment="块样式 JSON")
+    edit_mode = Column(String(20), default="manual", comment="manual/ai")
+    placeholder_key = Column(String(120), default="", comment="AI 占位键")
+    variable_key = Column(String(120), default="", comment="变量键")
+    default_value = Column(Text, default="", comment="默认值")
+    model_id = Column(Integer, ForeignKey("ai_models.id"), nullable=True, comment="指定模型")
+    need_prompt = Column(Boolean, default=True, comment="是否需要提示词")
+    prompt_text = Column(Text, default="", comment="预设提示词")
+    need_file = Column(Boolean, default=False, comment="是否需要上传参考文件")
+    file_note = Column(Text, default="", comment="参考文件说明")
+    output_format = Column(String(20), default="text", comment="text/table/mixed/chart")
+    created_at = Column(DateTime, server_default=func.now())
+    updated_at = Column(DateTime, server_default=func.now(), onupdate=func.now())