feat: 添加系统日志功能，记录运行时错误和AI调用失败，提供日志查看页面

.gitignore

@@ -18,6 +18,7 @@ data/*.sqlite
 data/*.sqlite3
 data/ai_settings.json
 data/box_types.json
+data/*.log
 *.db
 *.sqlite
 *.sqlite3

README.md

@@ -124,6 +124,16 @@ $env:SILICONFLOW_MODEL="Qwen/Qwen2.5-7B-Instruct"
 - 页面：`/ai/settings`
 - 保存文件：`data/ai_settings.json`
 
+### 2.6 系统日志
+
+为便于定位 AI 请求失败、配置错误、未处理异常，系统提供日志查看页面：
+
+- 页面入口：右上角 `账号` -> `系统日志`
+- 快速入口：`仓库概览` 页面 AI 补货建议卡片中的 `日志`
+- 日志文件：`data/app.log`
+
+当 AI 补货建议出现“请求失败，请稍后重试”时，优先打开系统日志查看最近的 `ERROR` 或 `WARNING` 记录。
+
 ## 3. 页面说明
 
 ### 3.1 首页 `/`

app.py

@@ -11,11 +11,14 @@ import re
 import csv
 import json
 import hmac
+import logging
 import difflib
 import base64
 import random
+import socket
 import string
 import hashlib
+import traceback
 import time
 import urllib.error
 import urllib.parse
@@ -23,9 +26,11 @@ import urllib.request
 from copy import deepcopy
 from io import StringIO
 from datetime import datetime, timedelta
+from logging.handlers import RotatingFileHandler
 
 from flask import Flask, Response, redirect, render_template, request, session, url_for
 from flask_sqlalchemy import SQLAlchemy
+from werkzeug.exceptions import HTTPException
 from werkzeug.security import check_password_hash, generate_password_hash
 
 
@@ -33,6 +38,7 @@ BASE_DIR = os.path.dirname(os.path.abspath(__file__))
 DB_DIR = os.path.join(BASE_DIR, "data")
 os.makedirs(DB_DIR, exist_ok=True)
 DB_PATH = os.path.join(DB_DIR, "inventory.db")
+APP_LOG_PATH = os.path.join(DB_DIR, "app.log")
 
 # Flask 和 SQLAlchemy 基础初始化。
 app = Flask(__name__)
@@ -44,6 +50,58 @@ app.config["SECRET_KEY"] = os.environ.get(
 )
 db = SQLAlchemy(app)
 
+
+def _setup_app_logger() -> None:
+    """初始化应用日志文件。
+
+    中文说明：把运行期错误、AI调用失败等信息写入 data/app.log，
+    方便在系统内直接查看，不再依赖控制台输出。
+    """
+    if getattr(app, "_inventory_log_ready", False):
+        return
+
+    handler = RotatingFileHandler(
+        APP_LOG_PATH,
+        maxBytes=512 * 1024,
+        backupCount=3,
+        encoding="utf-8",
+    )
+    handler.setFormatter(logging.Formatter("%(asctime)s [%(levelname)s] %(message)s"))
+
+    for existing_handler in app.logger.handlers:
+        if getattr(existing_handler, "baseFilename", "") == handler.baseFilename:
+            app._inventory_log_ready = True
+            return
+
+    app.logger.addHandler(handler)
+    app.logger.setLevel(logging.INFO)
+    app._inventory_log_ready = True
+
+
+def _log_event(level: int, event: str, **context) -> None:
+    parts = []
+    for key, value in context.items():
+        if value is None:
+            continue
+        text = str(value).replace("\n", " ").strip()
+        if not text:
+            continue
+        if len(text) > 280:
+            text = text[:277] + "..."
+        parts.append(f"{key}={text}")
+    message = event if not parts else f"{event} | {' | '.join(parts)}"
+    app.logger.log(level, message)
+
+
+def _read_log_lines(limit: int = 200) -> list[str]:
+    if not os.path.exists(APP_LOG_PATH):
+        return []
+    with open(APP_LOG_PATH, "r", encoding="utf-8", errors="ignore") as file_obj:
+        return [line.rstrip("\n") for line in file_obj.readlines()[-limit:]]
+
+
+_setup_app_logger()
+
 # 这里集中放全局常量，避免后面函数里散落硬编码。
 LOW_STOCK_THRESHOLD = 5
 BOX_TYPES_OVERRIDE_PATH = os.path.join(DB_DIR, "box_types.json")
@@ -2807,6 +2865,8 @@ def _call_siliconflow_chat(
         raise RuntimeError(f"AI 服务返回 HTTP {exc.code}: {detail[:200]}") from exc
     except urllib.error.URLError as exc:
         raise RuntimeError(f"AI 服务连接失败: {exc.reason}") from exc
+    except (TimeoutError, socket.timeout) as exc:
+        raise RuntimeError(f"AI 服务读取超时（>{timeout}秒），请稍后重试或在 AI 参数中调大超时") from exc
 
     try:
         data = json.loads(raw)
@@ -2856,6 +2916,28 @@ def logout_page():
     return redirect(url_for("login_page"))
 
 
+@app.route("/system/logs")
+def system_logs_page():
+    """查看系统日志。
+
+    中文说明：用于定位 AI 调用失败、未处理异常、配置错误等问题，
+    默认展示最近 200 行，可通过 query 参数 lines 调整。
+    """
+    raw_lines = (request.args.get("lines", "200") or "200").strip()
+    try:
+        line_limit = max(50, min(int(raw_lines), 1000))
+    except ValueError:
+        line_limit = 200
+
+    log_lines = _read_log_lines(line_limit)
+    return render_template(
+        "logs.html",
+        log_lines=log_lines,
+        line_limit=line_limit,
+        log_path=APP_LOG_PATH,
+    )
+
+
 @app.route("/account/password", methods=["GET", "POST"])
 def change_password_page():
     """登录后修改当前账号密码。
@@ -4244,6 +4326,14 @@ def ai_restock_plan():
             timeout=ai_settings["timeout"],
         )
     except RuntimeError as exc:
+        _log_event(
+            logging.WARNING,
+            "ai_restock_plan_runtime_error",
+            error=str(exc),
+            model=ai_settings.get("model", ""),
+            api_url=ai_settings.get("api_url", ""),
+            low_stock_count=len(data.get("low_stock_items", [])),
+        )
         fallback_plan = _build_rule_based_plan()
         return {
             "ok": False,
@@ -4251,6 +4341,22 @@ def ai_restock_plan():
             "plan": fallback_plan,
             "data": data,
         }, 400
+    except Exception as exc:
+        _log_event(
+            logging.ERROR,
+            "ai_restock_plan_unexpected_error",
+            error=str(exc),
+            traceback=traceback.format_exc(),
+            model=ai_settings.get("model", ""),
+            api_url=ai_settings.get("api_url", ""),
+        )
+        fallback_plan = _build_rule_based_plan()
+        return {
+            "ok": False,
+            "message": "服务器内部错误，请到系统日志查看详情",
+            "plan": fallback_plan,
+            "data": data,
+        }, 500
 
     parse_warning = ""
     try:
@@ -4799,6 +4905,39 @@ def clear_stats_logs():
     return redirect(url_for("stats_page", days=days, box_type=box_type_filter, notice=notice))
 
 
+@app.errorhandler(Exception)
+def handle_app_exception(exc: Exception):
+    if isinstance(exc, HTTPException):
+        status_code = exc.code or 500
+        title = exc.name or "请求失败"
+        message = exc.description or "请求处理失败"
+    else:
+        status_code = 500
+        title = "服务器异常"
+        message = "服务器内部错误，请到系统日志查看详情。"
+
+    _log_event(
+        logging.ERROR if status_code >= 500 else logging.WARNING,
+        "unhandled_exception",
+        status_code=status_code,
+        path=request.path,
+        method=request.method,
+        error=str(exc),
+        traceback=traceback.format_exc() if status_code >= 500 else "",
+    )
+
+    return (
+        render_template(
+            "error.html",
+            status_code=status_code,
+            title=title,
+            message=message,
+            back_url=request.referrer or url_for("types_page"),
+        ),
+        status_code,
+    )
+
+
 def bootstrap() -> None:
     """应用启动时初始化数据库。
 

data/ai_settings.json

@@ -2,7 +2,7 @@
   "api_url": "https://api.siliconflow.cn/v1/chat/completions",
   "model": "Pro/zai-org/GLM-5",
   "api_key": "sk-pekgnbdvwgydxzteabnykswjadkitoopwcekmksydfoslmlo",
-  "timeout": 30,
+  "timeout": 120,
   "restock_threshold": 2,
   "restock_limit": 24,
   "lcsc_base_url": "https://open-api.jlc.com",

static/css/style.css

@@ -613,6 +613,11 @@ body {
     background: color-mix(in srgb, var(--card-alt) 76%, var(--accent) 24%);
 }
 
+.log-viewer {
+    max-height: 70vh;
+    overflow: auto;
+}
+
 .box-list {
     display: grid;
     grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));

templates/_account_menu.html

@@ -5,6 +5,7 @@
         <p class="account-menu-meta">在线时长：{{ auth_online_for }}</p>
         <p class="account-menu-meta">最后活动：{{ auth_last_active_at }}</p>
         <p class="account-menu-meta">空闲时长：{{ auth_idle_for }}</p>
+        <a class="account-menu-item" href="{{ url_for('system_logs_page') }}" role="menuitem">系统日志</a>
         <a class="account-menu-item" href="{{ url_for('change_password_page') }}" role="menuitem">修改密码</a>
         <a class="account-menu-item" href="{{ url_for('logout_page') }}" role="menuitem">退出登录</a>
     </div>

templates/ai_settings.html

@@ -46,6 +46,7 @@
                     超时（秒）
                     <input type="number" name="timeout" min="5" value="{{ settings.timeout }}">
                 </label>
+                <p class="hint full">若使用较慢模型（如 GLM-5、较大推理模型）生成补货建议超时，可先将这里调到 60-90 秒再重试。</p>
                 <label>
                     低库存阈值
                     <input type="number" name="restock_threshold" min="0" value="{{ settings.restock_threshold }}">

templates/error.html

@@ -20,6 +20,9 @@
             <p class="alert">{{ message }}</p>
             <div class="actions" style="margin-top: 10px;">
                 <a class="btn" href="{{ back_url }}">返回上一页</a>
+                {% if status_code >= 500 %}
+                <a class="btn btn-light" href="{{ url_for('system_logs_page') }}">查看系统日志</a>
+                {% endif %}
                 <button class="btn btn-light" type="button" onclick="history.back()">浏览器返回</button>
             </div>
         </section>

templates/logs.html

@@ -0,0 +1,43 @@
+<!DOCTYPE html>
+<html lang="zh-CN">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>系统日志</title>
+    <link rel="stylesheet" href="{{ url_for('static', filename='css/style.css') }}">
+</head>
+<body>
+    <header class="hero slim">
+        <div>
+            <h1>系统日志</h1>
+            <p>查看最近运行日志，优先关注 ERROR、WARNING 与 AI 接口失败记录</p>
+        </div>
+        <div class="hero-actions">
+            <a class="btn btn-light" href="{{ url_for('types_page') }}">返回仓库概览</a>
+            <a class="btn btn-light" href="{{ url_for('ai_settings_page') }}">AI参数</a>
+            {% include '_account_menu.html' %}
+        </div>
+    </header>
+
+    <main class="container">
+        <section class="panel">
+            <div class="group-title-row">
+                <div>
+                    <h2>日志文件</h2>
+                    <p class="hint">路径：{{ log_path }}</p>
+                </div>
+                <div class="actions">
+                    <a class="btn btn-light" href="{{ url_for('system_logs_page', lines=100) }}">最近100行</a>
+                    <a class="btn btn-light" href="{{ url_for('system_logs_page', lines=200) }}">最近200行</a>
+                    <a class="btn btn-light" href="{{ url_for('system_logs_page', lines=500) }}">最近500行</a>
+                </div>
+            </div>
+            {% if log_lines %}
+            <pre class="ai-panel-content log-viewer">{{ log_lines | join('\n') }}</pre>
+            {% else %}
+            <p class="hint">当前还没有日志记录。首次出现错误后会自动写入。</p>
+            {% endif %}
+        </section>
+    </main>
+</body>
+</html>

templates/types.html

@@ -91,8 +91,11 @@
             <section class="panel ai-panel" id="ai-panel">
                 <div class="ai-panel-head">
                     <h2>AI补货建议</h2>
+                    <div class="hero-actions">
+                        <a class="btn btn-light" href="{{ url_for('system_logs_page') }}">日志</a>
                         <a class="btn btn-light" href="{{ url_for('ai_settings_page') }}">参数</a>
                     </div>
+                </div>
                 <p class="hint">根据低库存与近30天出库数据，生成可执行补货建议。</p>
                 <button class="btn" id="ai-restock-btn" type="button">生成建议</button>
                 <p class="hint" id="ai-panel-status"></p>