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/api/deps.py

@@ -0,0 +1,64 @@
+"""
+FastAPI 依赖注入 — Workspace 上下文、权限检查
+"""
+from dataclasses import dataclass
+from typing import Optional
+
+from fastapi import Depends, HTTPException, Request
+from sqlalchemy.orm import Session
+
+from app.core.database import get_db
+from app.core.security import decode_access_token
+from app.models.user import User
+
+
+@dataclass
+class WorkspaceContext:
+    """工作区上下文 — 包装当前用户 + 当前工作区 ID"""
+    user: User
+    workspace_id: str
+
+
+def get_current_workspace_id(request: Request) -> str:
+    """从 JWT 的 `ws` 字段提取当前工作区 ID。"""
+    auth_header = request.headers.get("Authorization", "")
+    if not auth_header.startswith("Bearer "):
+        raise HTTPException(status_code=401, detail="未提供有效的认证令牌")
+
+    token = auth_header[7:]
+    payload = decode_access_token(token)
+    if payload is None:
+        raise HTTPException(status_code=401, detail="无效的访问令牌")
+
+    ws_id = payload.get("ws")
+    if not ws_id:
+        raise HTTPException(status_code=400, detail="令牌中未包含工作区信息，请重新登录")
+
+    return ws_id
+
+
+def get_workspace_context(
+    request: Request,
+    db: Session = Depends(get_db),
+) -> WorkspaceContext:
+    """获取完整的 Workspace 上下文（用户 + 工作区），用于需要 workspace 过滤的接口。"""
+    auth_header = request.headers.get("Authorization", "")
+    if not auth_header.startswith("Bearer "):
+        raise HTTPException(status_code=401, detail="未提供有效的认证令牌")
+
+    token = auth_header[7:]
+    payload = decode_access_token(token)
+    if payload is None:
+        raise HTTPException(status_code=401, detail="无效的访问令牌")
+
+    user_id = payload.get("sub")
+    ws_id = payload.get("ws")
+
+    if not user_id:
+        raise HTTPException(status_code=401, detail="无效的访问令牌")
+
+    user = db.query(User).filter(User.id == user_id).first()
+    if not user:
+        raise HTTPException(status_code=401, detail="用户不存在")
+
+    return WorkspaceContext(user=user, workspace_id=ws_id or "")