fix: 移除 enable_logging 错误拦截

[LaoYueHanNi]

问题描述

使用统计（Usage Statistics）在升级到某个版本后不再记录到数据库 proxy_request_logs 表中。

问题原因

提交: bf40b01

这个提交本意是：当用户关闭"启用日志记录"开关时，跳过 HTTP请求详情的日志写入。但同时跳过了使用统计记录，导致未开启日志记录时，使用统计无法记录。

问题代码

src-tauri/src/proxy/response_processor.rs 中有两处问题代码：

1. 流式响应处理（第 283-302 行）:
SseUsageCollector::new(start_time, move |events, first_token_ms| {
    if !logging_enabled {
        return;  // 错误：同时跳过了使用统计记录
    }
    // ...
});

2. 非流式响应处理（第 366-371 行）:
fn spawn_log_usage(...) {
    if let Ok(config) = state.config.try_read() {
        if !config.enable_logging {
            return;  // 错误：同时跳过了使用统计记录
        }
    }
    // ...
}

修复内容

1. 移除 enable_logging 检查：删除 response_processor.rs 中两处对 enable_logging
   的检查，让使用统计始终记录，不受日志开关影响

测试计划

• 关闭"启用日志记录"开关，验证使用统计仍能正常记录
• 开启"启用日志记录"开关，验证使用统计能正常记录
• 验证数据库 proxy_request_logs 表中有数据
• 已通过 cargo test proxy --lib 测试 (296 passed)

[LaoYueHanNi]

失误关闭的PR 操作失误把上个pr关闭了，现在已rebase好重新提交。

[yovinchen]

@codex review

[chatgpt-codex-connector]

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[farion1231]

@codex review

[chatgpt-codex-connector]

Codex Review: Didn't find any major issues. What shall we delve into next?

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