feat(日志): 实现定时日志清理功能并统一服务端口为19070

- 添加每小时定时清理项目控制台日志功能，保留最新1000条且不超过24小时
- 将所有服务端口统一调整为19070，包括后端API、Nginx配置和文档
- 优化前端日志显示，支持单行折叠和点击展开
- 更新相关测试用例和部署文档

openspec/changes/update-log-prune-schedule/proposal.md

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+# Change: Update Log Prune Schedule
+
+## Why
+
+项目日志持续增长会造成Redis列表膨胀，影响读写性能，需要在服务端统一执行定时清理。
+
+## What Changes
+
+- 每小时整点检查 `项目心跳` 内的全部项目日志列表
+- 删除 `${projectName}_项目控制台` 中超过24小时的日志记录
+- 若日志数量超过1000条，按时间倒序保留最新1000条
+
+## Impact
+
+- Affected specs: specs/logging/spec.md
+- Affected code: src/backend/routes/logs.js, src/backend/server.js

openspec/changes/update-log-prune-schedule/specs/logging/spec.md

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+## ADDED Requirements
+
+### Requirement: Scheduled Log Pruning
+The system SHALL prune each `${projectName}_项目控制台` log list once per hour.
+
+#### Scenario: Hourly pruning of console logs
+- **WHEN** the server reaches the top of an hour
+- **THEN** it SHALL remove log records older than 24 hours
+- **AND** it SHALL keep only the latest 1000 log records by timestamp
+- **AND** the pruning operation SHALL explicitly sort records by timestamp to ensure correctness regardless of insertion order
+
+### Requirement: Console Log Display
+The console UI SHALL display logs in a compact format.
+
+#### Scenario: Log Message Truncation
+- **WHEN** a log message is displayed in the list
+- **THEN** it SHALL be restricted to a single line
+- **AND** overflow content SHALL be indicated with an ellipsis
+- **AND** clicking the message SHALL toggle expansion to show the full content
+- **AND** only one message SHALL be expanded at a time

openspec/changes/update-log-prune-schedule/tasks.md

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+## 1. OpenSpec
+
+- [x] 1.1 Add logging spec delta for scheduled log pruning
+
+## 2. Backend
+
+- [x] 2.1 Implement hourly log pruning with 24h TTL and 1000 limit
+- [x] 2.2 Update scheduled pruning tests
+
+## 3. Verify
+
+- [x] 3.1 Run `npm run test`
+- [x] 3.2 Run `npm run lint`