refactor(logging): 优化日志格式和内容以提高可读性

- 调整日志格式，增加模块名显示
- 将部分debug日志升级为info级别以增加可见性
- 简化日志消息，缩短显示长度
- 统一日志前缀格式
- 优化工具调用日志显示

orchestrator/agent.py

@@ -84,63 +84,57 @@ class OrchestrationAgent:
     async def run(self, user_id: str, text: str) -> str:
         """Process a user message and return the agent's reply."""
         active_conv = self._active_conv[user_id]
-        logger.debug(
-            "[mailboy] run | user=%s active_conv=%s msg=%r",
-            user_id, active_conv, text[:120],
-        )
+        short_uid = user_id[-8:]
+        logger.info(">>> user=...%s  conv=%s  msg=%r", short_uid, active_conv, text[:80])
+        logger.debug("    history_len=%d", len(self._history[user_id]))
 
         messages: List[BaseMessage] = (
             [SystemMessage(content=self._build_system_prompt(user_id))]
             + self._history[user_id]
             + [HumanMessage(content=text)]
         )
-        logger.debug("[mailboy] history_len=%d", len(self._history[user_id]))
 
         reply = ""
         try:
             for iteration in range(MAX_ITERATIONS):
-                logger.debug("[mailboy] LLM call iteration=%d", iteration)
+                logger.debug("    LLM call #%d", iteration)
                 ai_msg: AIMessage = await self._llm_with_tools.ainvoke(messages)
                 messages.append(ai_msg)
 
                 if not ai_msg.tool_calls:
                     reply = ai_msg.content or ""
-                    logger.debug("[mailboy] final reply (no tool calls): %r", reply[:200])
+                    logger.debug("    → done (no tool call)")
                     break
 
-                logger.debug(
-                    "[mailboy] tool_calls=%s",
-                    [(tc["name"], tc["args"]) for tc in ai_msg.tool_calls],
-                )
-
                 for tc in ai_msg.tool_calls:
                     tool_name = tc["name"]
                     tool_args = tc["args"]
                     tool_id = tc["id"]
 
+                    args_summary = ", ".join(
+                        f"{k}={str(v)[:50]!r}" for k, v in tool_args.items()
+                    )
+                    logger.info("    ⚙  %s(%s)", tool_name, args_summary)
+
                     tool_obj = _TOOL_MAP.get(tool_name)
                     if tool_obj is None:
                         result = f"Unknown tool: {tool_name}"
-                        logger.warning("[mailboy] unknown tool: %s", tool_name)
+                        logger.warning("    unknown tool: %s", tool_name)
                     else:
-                        logger.debug("[mailboy] calling tool %s args=%s", tool_name, tool_args)
                         try:
                             result = await tool_obj.arun(tool_args)
                         except Exception as exc:
                             result = f"Tool error: {exc}"
-                            logger.error("[mailboy] tool %s error: %s", tool_name, exc)
-                    logger.debug("[mailboy] tool %s result: %r", tool_name, str(result)[:300])
+                            logger.error("    tool %s error: %s", tool_name, exc)
+
+                    logger.debug("    ←  %s: %r", tool_name, str(result)[:120])
 
-                    # If a session was just created, record it as the active session
                     if tool_name == "create_conversation":
                         try:
                             data = json.loads(result)
                             if "conv_id" in data:
                                 self._active_conv[user_id] = data["conv_id"]
-                                logger.info(
-                                    "[mailboy] active session for %s set to %s",
-                                    user_id, data["conv_id"],
-                                )
+                                logger.info("    ✓  active session → %s", data["conv_id"])
                         except Exception:
                             pass
 
@@ -149,13 +143,13 @@ class OrchestrationAgent:
                     )
             else:
                 reply = "[Max iterations reached]"
-                logger.warning("[mailboy] max iterations reached for user=%s", user_id)
+                logger.warning("    max iterations reached")
 
         except Exception as exc:
-            logger.exception("[mailboy] agent error for user=%s", user_id)
+            logger.exception("agent error for user=%s", user_id)
             reply = f"[Error] {exc}"
 
-        logger.info("[mailboy] user=%s reply=%r", user_id, reply[:200])
+        logger.info("<<< reply: %r", reply[:120])
 
         # Update history
         self._history[user_id].append(HumanMessage(content=text))