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/services/builtin_tools.py

@@ -495,6 +495,7 @@ async def file_write_tool(file_path: str, content: str, mode: str = "w") -> str:
                 f.write(raw)
         else:
             path.write_text(raw, encoding="utf-8")
+        logger.info("file_write 成功: %s (%d bytes)", path, enc_len)
         return json.dumps(
             {
                 "success": True,
@@ -6076,6 +6077,103 @@ CREATE_GITEA_ISSUE_SCHEMA = {
 }
 
 
+# ═══════════════════════════════════════════════════════════════
+# 项目扫描工具 — 程序化扫描项目关键源文件
+# ═══════════════════════════════════════════════════════════════
+
+async def project_scan_tool(target_dir: str) -> str:
+    """扫描项目目录，自动识别项目类型并读取关键源文件内容。
+
+    支持 Android (Kotlin/Java)、前端 (Vue/React)、Python (FastAPI/Flask)、Go 等项目类型。
+    自动按优先级读取 ViewModel/Screen/Repository/API 等核心文件。
+    返回格式化的 Markdown，可直接用于代码分析。
+
+    Args:
+        target_dir: 项目根目录的绝对路径
+
+    Returns:
+        JSON: project_type, files_scanned, source_code (Markdown 格式)
+    """
+    try:
+        from app.services.project_scanner import (
+            identify_project_type,
+            scan_source_code,
+        )
+        path = Path(target_dir).resolve()
+        if not path.exists():
+            return json.dumps(
+                {"error": f"目录不存在: {target_dir}"},
+                ensure_ascii=False,
+            )
+        if not path.is_dir():
+            return json.dumps(
+                {"error": f"路径不是目录: {target_dir}"},
+                ensure_ascii=False,
+            )
+
+        # 安全检查：遵守 LOCAL_FILE_TOOLS_ROOT 限制
+        try:
+            # 复用 file_read 的路径解析逻辑
+            from app.services.builtin_tools import _local_file_workspace_root
+            root = _local_file_workspace_root()
+        except Exception:
+            root = Path(".").resolve().parent
+
+        try:
+            path.relative_to(root)
+        except ValueError:
+            return json.dumps(
+                {"error": f"目录不在允许的范围内: {target_dir}，允许根: {root}"},
+                ensure_ascii=False,
+            )
+
+        ptype = identify_project_type(path)
+        if not ptype:
+            # 列出目录结构作为降级方案
+            try:
+                top_items = sorted(
+                    [p for p in path.iterdir() if not p.name.startswith('.')],
+                    key=lambda p: (p.is_file(), p.name)
+                )[:50]
+                listing = "\n".join(
+                    f"- {p.name}{'/' if p.is_dir() else ''}" for p in top_items
+                )
+                return json.dumps({
+                    "project_type": "unknown",
+                    "files_scanned": 0,
+                    "source_code": f"## 目录结构: `{path}`\n\n{listing}\n",
+                }, ensure_ascii=False)
+            except (PermissionError, OSError) as e:
+                return json.dumps(
+                    {"error": f"无法访问目录: {e}"},
+                    ensure_ascii=False,
+                )
+
+        result_md = scan_source_code(path)
+        if not result_md:
+            return json.dumps({
+                "project_type": ptype,
+                "files_scanned": 0,
+                "source_code": f"未找到匹配的源文件 (项目类型: {ptype})\n",
+            }, ensure_ascii=False)
+
+        # 粗略统计文件数
+        file_count = result_md.count("#### `")
+
+        return json.dumps({
+            "project_type": ptype,
+            "files_scanned": file_count,
+            "source_code": result_md,
+        }, ensure_ascii=False)
+
+    except Exception as e:
+        logger.exception("项目扫描工具异常: %s", e)
+        return json.dumps(
+            {"error": f"项目扫描失败: {e}"},
+            ensure_ascii=False,
+        )
+
+
 # ═══════════════════════════════════════════════════════════════
 # 测试结果解析工具 — 支持 JSON / XML / CSV 格式
 # ═══════════════════════════════════════════════════════════════
@@ -6288,3 +6386,26 @@ PARSE_TEST_RESULT_FILE_SCHEMA = {
         },
     },
 }
+
+PROJECT_SCAN_SCHEMA = {
+    "type": "function",
+    "function": {
+        "name": "project_scan",
+        "description": (
+            "扫描项目目录，自动识别项目类型（Android Kotlin/Java、Vue/React 前端、Python、Go 等），"
+            "并按优先级读取关键源文件（ViewModel > Screen > Repository > API > DAO > 其他）。"
+            "返回格式化的 Markdown 源码清单和项目类型信息，适合在代码审查、Bug 分析、架构评审前使用。"
+            "注意：单次最多读取 12 个文件、总大小不超过 50KB，大文件会自动截断。"
+        ),
+        "parameters": {
+            "type": "object",
+            "properties": {
+                "target_dir": {
+                    "type": "string",
+                    "description": "要扫描的项目根目录绝对路径，例如 D:/aaa/aiagent/android",
+                },
+            },
+            "required": ["target_dir"],
+        },
+    },
+}