feat: add Case, TaskLog, LLMConfig, SystemConfig models

platform/backend/app/models.py

@@ -217,3 +217,100 @@ class SystemConfig(Base):
             "created_at": self.created_at.isoformat() if self.created_at else None,
             "updated_at": self.updated_at.isoformat() if self.updated_at else None,
         }
+
+
+# --- 新增模型：案例库 ---
+class Case(Base):
+    __tablename__ = "cases"
+
+    id = Column(Integer, primary_key=True, index=True, autoincrement=True)
+    title = Column(String, nullable=False)
+    field = Column(String, nullable=False)  # 对应四大支柱及其子领域
+    summary = Column(Text, nullable=False)
+    key_metrics = Column(Text, nullable=True)  # 关键数据，JSON字符串或纯文本
+    date = Column(String, nullable=True)  # 年份或具体日期，如 "2024"
+    source = Column(String, nullable=False)
+    source_url = Column(String, nullable=True)
+    credibility_rating = Column(String, nullable=True)  # 如 "⭐⭐⭐"
+    china_applicability = Column(String, nullable=True)  # 如 "⭐⭐⭐⭐"
+    created_at = Column(DateTime(timezone=True), server_default=func.now())
+    updated_at = Column(DateTime(timezone=True), onupdate=func.now())
+
+    def to_dict(self):
+        return {
+            "id": self.id,
+            "title": self.title,
+            "field": self.field,
+            "summary": self.summary,
+            "key_metrics": self.key_metrics,
+            "date": self.date,
+            "source": self.source,
+            "source_url": self.source_url,
+            "credibility_rating": self.credibility_rating,
+            "china_applicability": self.china_applicability,
+            "created_at": self.created_at.isoformat() if self.created_at else None,
+        }
+
+# --- 新增模型：任务日志 ---
+class TaskLog(Base):
+    __tablename__ = "task_logs"
+
+    id = Column(Integer, primary_key=True, index=True, autoincrement=True)
+    task_name = Column(String, nullable=False)  # collector/creator/optimizer/research/outline/writer
+    topic_id = Column(String, nullable=True)  # 关联选题ID
+    status = Column(String, nullable=False)  # started/completed/failed
+    message = Column(Text, nullable=True)
+    started_at = Column(DateTime(timezone=True), nullable=False)
+    finished_at = Column(DateTime(timezone=True), nullable=True)
+    duration_seconds = Column(Integer, nullable=True)
+
+    def to_dict(self):
+        return {
+            "id": self.id,
+            "task_name": self.task_name,
+            "topic_id": self.topic_id,
+            "status": self.status,
+            "message": self.message,
+            "started_at": self.started_at.isoformat() if self.starthed_at else None,
+            "finished_at": self.finished_at.isoformat() if self.finished_at else None,
+            "duration_seconds": self.duration_seconds,
+        }
+
+# --- 新增模型：LLM 配置 ---
+class LLMConfig(Base):
+    __tablename__ = "llm_configs"
+
+    id = Column(Integer, primary_key=True, index=True, autoincrement=True)
+    name = Column(String, unique=True, nullable=False)  # e.g., "default_expand"
+    system_prompt = Column(Text, nullable=False)
+    user_prompt_template = Column(Text, nullable=False)
+    temperature = Column(Float, default=0.7)
+    max_tokens = Column(Integer, default=1000)
+    model = Column(String, nullable=True)  # e.g., "stepfun-ai/step-3.5-flash"
+    is_active = Column(Boolean, default=True)
+    created_at = Column(DateTime(timezone=True), server_default=func.now())
+    updated_at = Column(DateTime(timezone=True), onupdate=func.now())
+
+    def to_dict(self):
+        return {
+            "id": self.id,
+            "name": self.name,
+            "system_prompt": self.system_prompt,
+            "user_prompt_template": self.user_prompt_template,
+            "temperature": self.temperature,
+            "max_tokens": self.max_tokens,
+            "model": self.model,
+            "is_active": self.is_active,
+        }
+
+# --- 新增模型：系统配置（键值对） ---
+class SystemConfig(Base):
+    __tablename__ = "system_configs"
+
+    key = Column(String, primary_key=True)
+    value = Column(Text, nullable=True)  # JSON 字符串或普通文本
+    description = Column(String, nullable=True)
+    updated_at = Column(DateTime(timezone=True), onupdate=func.now())
+
+    def to_dict(self):
+        return {"key": self.key, "value": self.value, "description": self.description}