fix: delete agent 500 error + dynamic personality + deployment guide

- Fix delete agent 500: clean up FK records (agent_llm_logs, permissions,
  schedules, executions, team_members) and unbind goals/tasks before delete
- Remove hardcoded personality templates in Android, replace with dynamic
  system prompt generation from name + description
- Set promptSectionsEnabled=false to bypass PromptComposer for personality
- Add Tencent Cloud Linux deployment guide (Docker Compose)
- Accumulated backend service updates, frontend UI fixes, Android app changes

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

backend/app/models/agent.py

@@ -1,7 +1,7 @@
 """
 智能体模型
 """
-from sqlalchemy import Column, String, Text, Integer, DateTime, JSON, ForeignKey, func
+from sqlalchemy import Column, String, Text, Integer, DateTime, JSON, ForeignKey, Index, func
 from sqlalchemy.dialects.mysql import CHAR
 from sqlalchemy.orm import relationship
 from app.core.database import Base
@@ -27,6 +27,7 @@ class Agent(Base):
     version = Column(Integer, default=1, comment="版本号")
     status = Column(String(20), default="draft", comment="状态: draft/published/running/stopped")
     user_id = Column(CHAR(36), ForeignKey("users.id"), comment="创建者ID")
+    workspace_id = Column(CHAR(36), ForeignKey("workspaces.id"), nullable=True, comment="所属工作区ID")
 
     # 技能市场字段
     category = Column(String(50), nullable=True, comment="分类: llm/data_processing/automation/integration/other")
@@ -39,6 +40,7 @@ class Agent(Base):
     use_count = Column(Integer, default=0, comment="被安装次数")
     view_count = Column(Integer, default=0, comment="查看次数")
     forked_from_id = Column(CHAR(36), nullable=True, comment="从哪个Agent Fork而来（市场安装）")
+    parent_agent_id = Column(CHAR(36), nullable=True, comment="父 Agent ID（自主创建时继承经验）")
 
     created_at = Column(DateTime, default=func.now(), comment="创建时间")
     updated_at = Column(DateTime, default=func.now(), onupdate=func.now(), comment="更新时间")