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/scripts/migrate_add_workspace.py

@@ -0,0 +1,114 @@
+"""
+数据迁移脚本：创建默认工作区，将所有现有数据归入默认工作区。
+
+运行方式: cd backend && ./venv/Scripts/python scripts/migrate_add_workspace.py
+"""
+import sys
+import os
+sys.path.insert(0, os.path.join(os.path.dirname(__file__), '..'))
+
+import uuid
+from datetime import datetime
+from app.core.database import SessionLocal, engine
+from app.core.config import settings
+
+def migrate():
+    db = SessionLocal()
+    try:
+        # 1. 创建默认工作区
+        from app.models.workspace import Workspace, WorkspaceMembership
+        from app.models.user import User
+
+        # 检查是否已有默认工作区
+        existing = db.query(Workspace).filter(Workspace.is_default == 1).first()
+        if existing:
+            print(f"默认工作区已存在: {existing.id} ({existing.name})")
+            default_ws_id = existing.id
+            default_ws = existing
+        else:
+            # 找到第一个 admin 用户作为 owner
+            admin_user = db.query(User).filter(User.role == "admin").first()
+            if not admin_user:
+                admin_user = db.query(User).first()
+            if not admin_user:
+                print("错误: 数据库中没有用户，请先创建管理员账户")
+                return
+
+            default_ws = Workspace(
+                id=str(uuid.uuid4()),
+                name="默认工作区",
+                description="系统自动创建的默认工作区，包含所有历史数据",
+                is_default=1,
+                owner_id=admin_user.id,
+                max_members=200,
+                status="active",
+                created_at=datetime.utcnow(),
+                updated_at=datetime.utcnow(),
+            )
+            db.add(default_ws)
+            db.flush()
+            default_ws_id = default_ws.id
+            print(f"已创建默认工作区: {default_ws_id} ({default_ws.name})")
+
+        # 2. 将所有现有用户加入默认工作区
+        all_users = db.query(User).all()
+        added_count = 0
+        for user in all_users:
+            existing_membership = db.query(WorkspaceMembership).filter(
+                WorkspaceMembership.workspace_id == default_ws_id,
+                WorkspaceMembership.user_id == user.id,
+            ).first()
+            if not existing_membership:
+                membership = WorkspaceMembership(
+                    id=str(uuid.uuid4()),
+                    workspace_id=default_ws_id,
+                    user_id=user.id,
+                    role="admin",  # 现有用户默认给admin角色
+                    joined_at=datetime.utcnow(),
+                )
+                db.add(membership)
+                added_count += 1
+
+        db.flush()
+        print(f"已将 {added_count} 个用户加入默认工作区")
+
+        # 3. 回填所有 Tier 1 表的 workspace_id
+        tables_to_backfill = [
+            ("agents", "user_id"),
+            ("workflows", "user_id"),
+            ("goals", "creator_id"),
+            ("knowledge_bases", "user_id"),
+            ("data_sources", "user_id"),
+            ("model_configs", "user_id"),
+            ("tools", "user_id"),
+            ("agent_schedules", "user_id"),
+            ("workflow_templates", "user_id"),
+            ("orchestration_templates", "user_id"),
+            ("executions", None),  # No user_id, backfill all
+            ("tasks", None),
+        ]
+
+        from sqlalchemy import text
+        for table, _user_col in tables_to_backfill:
+            result = db.execute(
+                text(f"UPDATE {table} SET workspace_id = :ws_id WHERE workspace_id IS NULL"),
+                {"ws_id": default_ws_id}
+            )
+            print(f"  {table}: 已回填 {result.rowcount} 行")
+
+        db.commit()
+        print("\n迁移完成!")
+        print(f"  默认工作区: {default_ws_id}")
+        print(f"  成员数: {len(all_users)}")
+        print(f"  所有现有数据已归入默认工作区")
+
+    except Exception as e:
+        db.rollback()
+        print(f"迁移失败: {e}")
+        raise
+    finally:
+        db.close()
+
+
+if __name__ == "__main__":
+    migrate()