refactor: 后端代码质量优化 - 复用公共库、使用标准库、类型安全错误判断
## 高优先级修复 - stats_service_impl: 使用 strings.SplitN 替代错误的索引分割 - provider_handler: 使用 errors.Is(err, gorm.ErrDuplicatedKey) 替代字符串匹配 - client: 重写 isNetworkError 使用 errors.As/Is 类型安全判断 - proxy_handler: 使用 encoding/json 标准库解析 JSON(extractModelName、isStreamRequest) ## 中优先级修复 - stats_handler: 添加 parseDateParam 辅助函数消除重复日期解析 - pkg/errors: 新增 ErrRequestCreate/Send/ResponseRead 错误类型和 WithCause 方法 - client: 使用结构化错误替代 fmt.Errorf - ConversionEngine: logger 依赖注入,替换所有 zap.L() 调用 ## 低优先级修复 - encoder: 删除 joinStrings,使用 strings.Join - adapter: 删除 modelInfoRegex 正则,使用 isModelInfoPath 字符串函数 ## 文档更新 - README.md: 添加公共库使用指南和编码规范章节 - specs: 同步 delta specs 到 main specs(error-handling、structured-logging、request-validation) ## 归档 - openspec/changes/archive/2026-04-20-refactor-backend-code-quality/
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@@ -90,6 +90,9 @@ func TestPredefinedErrors(t *testing.T) {
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{"ErrInternal", ErrInternal, "internal_error", http.StatusInternalServerError},
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{"ErrDatabaseNotInit", ErrDatabaseNotInit, "database_not_initialized", http.StatusInternalServerError},
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{"ErrConflict", ErrConflict, "conflict", http.StatusConflict},
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{"ErrRequestCreate", ErrRequestCreate, "request_create_error", http.StatusInternalServerError},
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{"ErrRequestSend", ErrRequestSend, "request_send_error", http.StatusBadGateway},
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{"ErrResponseRead", ErrResponseRead, "response_read_error", http.StatusBadGateway},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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@@ -123,3 +126,16 @@ func TestAsAppError(t *testing.T) {
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assert.False(t, ok)
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})
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}
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func TestWithCause(t *testing.T) {
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cause := errors.New("连接超时")
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err := ErrRequestSend.WithCause(cause)
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assert.Equal(t, "request_send_error", err.Code)
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assert.Equal(t, http.StatusBadGateway, err.HTTPStatus)
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assert.Equal(t, cause, err.Cause)
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assert.True(t, errors.Is(err, cause))
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var appErr *AppError
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assert.True(t, errors.As(err, &appErr))
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assert.Equal(t, "request_send_error", appErr.Code)
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}
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