Refactor/simplify proxy logs (#585)

* refactor(proxy): simplify logging for better readability

- Delete 17 verbose debug logs from handlers, streaming, and response_processor
- Convert excessive INFO logs to DEBUG level for internal processing details
- Add 2 critical INFO logs in forwarder.rs for failover scenarios:
  - Log when switching to next provider after failure
  - Log when all providers have been exhausted
- Fix clippy uninlined_format_args warning

This reduces log noise while maintaining visibility into key user-facing decisions.

* fix: replace unsafe unwrap() calls with proper error handling

- database/dao/mcp.rs: Use map_err for serde_json serialization
- database/dao/providers.rs: Use map_err for settings_config and meta serialization
- commands/misc.rs: Use expect() for compile-time regex pattern
- services/prompt.rs: Use unwrap_or_default() for SystemTime
- deeplink/provider.rs: Replace unwrap() with is_none_or pattern for Option checks

Reduces potential panic points from 26 to 1 (static regex init, safe).

* refactor(proxy): simplify verbose logging output

- Remove response JSON full output logging in response_processor
- Remove per-request INFO logs in provider_router (failover status, provider selection)
- Change model mapping log from INFO to DEBUG
- Change usage logging failure from INFO to WARN
- Remove redundant debug logs for circuit breaker operations

Reduces log noise significantly while preserving important warnings and errors.

* feat(proxy): add structured log codes for i18n support

Add error code system to proxy module logs for multi-language support:

- CB-001~006: Circuit breaker state transitions and triggers
- SRV-001~004: Proxy server lifecycle events
- FWD-001~002: Request forwarding and failover
- FO-001~005: Failover switch operations
- USG-001~002: Usage logging errors

Log format: [CODE] Chinese message
Frontend/log tools can map codes to any language.

New file: src/proxy/log_codes.rs - centralized code definitions

* chore: bump version to 3.9.1

* style: format code with prettier and rustfmt

* fix(ui): allow number inputs to be fully cleared before saving

- Convert numeric state to string type for controlled inputs
- Use isNaN() check instead of || fallback to allow 0 values
- Apply fix to ProxyPanel, CircuitBreakerConfigPanel,
  AutoFailoverConfigPanel, and ModelTestConfigPanel

* feat(pricing): support @ separator in model name matching

- Refactor model name cleaning into chained method calls
- Add @ to - replacement (e.g., gpt-5.2-codex@low → gpt-5.2-codex-low)
- Add test case for @ separator matching

* fix(proxy): improve validation and error handling in proxy config panels

- Add StopTimeout/StopFailed error types for proper stop() error reporting
- Replace silent clamp with validation-and-block in config panels
- Add listenAddress format validation in ProxyPanel
- Use log_codes constants instead of hardcoded strings
- Use once_cell::Lazy for regex precompilation

* fix(proxy): harden error handling and input validation

- Handle RwLock poisoning in settings.rs with unwrap_or_else
- Add fallback for dirs::home_dir() in config modules
- Normalize localhost to 127.0.0.1 in ProxyPanel
- Format IPv6 addresses with brackets for valid URLs
- Strict port validation with pure digit regex
- Treat NaN as validation failure in config panels
- Log warning on cost_multiplier parse failure
- Align timeoutSeconds range to [0, 300] across all panels

src-tauri/src/proxy/handlers.rs

@@ -98,16 +98,6 @@ pub async fn handle_messages(
     let adapter = get_adapter(&AppType::Claude);
     let needs_transform = adapter.needs_transform(&ctx.provider);
 
-    log::info!(
-        "[Claude] Provider: {}, needs_transform: {}, is_stream: {}",
-        ctx.provider.name,
-        needs_transform,
-        is_stream
-    );
-
-    let status = response.status();
-    log::info!("[Claude] 上游响应状态: {status}");
-
     // Claude 特有：格式转换处理
     if needs_transform {
         return handle_claude_transform(response, &ctx, &state, &body, is_stream).await;
@@ -131,8 +121,6 @@ async fn handle_claude_transform(
 
     if is_stream {
         // 流式响应转换 (OpenAI SSE → Anthropic SSE)
-        log::info!("[Claude] 开始流式响应转换 (OpenAI SSE → Anthropic SSE)");
-
         let stream = response.bytes_stream();
         let sse_stream = create_anthropic_sse_stream(stream);
 
@@ -196,13 +184,10 @@ async fn handle_claude_transform(
         );
 
         let body = axum::body::Body::from_stream(logged_stream);
-        log::info!("[Claude] ====== 请求结束 (流式转换) ======");
         return Ok((headers, body).into_response());
     }
 
     // 非流式响应转换 (OpenAI → Anthropic)
-    log::info!("[Claude] 开始转换响应 (OpenAI → Anthropic)");
-
     let response_headers = response.headers().clone();
 
     let body_bytes = response.bytes().await.map_err(|e| {
@@ -211,31 +196,17 @@ async fn handle_claude_transform(
     })?;
 
     let body_str = String::from_utf8_lossy(&body_bytes);
-    log::info!("[Claude] OpenAI 响应长度: {} bytes", body_bytes.len());
-    log::debug!("[Claude] OpenAI 原始响应: {body_str}");
 
     let openai_response: Value = serde_json::from_slice(&body_bytes).map_err(|e| {
         log::error!("[Claude] 解析 OpenAI 响应失败: {e}, body: {body_str}");
         ProxyError::TransformError(format!("Failed to parse OpenAI response: {e}"))
     })?;
 
-    log::info!("[Claude] 解析 OpenAI 响应成功");
-    log::info!(
-        "[Claude] <<< OpenAI 响应 JSON:\n{}",
-        serde_json::to_string_pretty(&openai_response).unwrap_or_default()
-    );
-
     let anthropic_response = transform::openai_to_anthropic(openai_response).map_err(|e| {
         log::error!("[Claude] 转换响应失败: {e}");
         e
     })?;
 
-    log::info!("[Claude] 转换响应成功");
-    log::info!(
-        "[Claude] <<< Anthropic 响应 JSON:\n{}",
-        serde_json::to_string_pretty(&anthropic_response).unwrap_or_default()
-    );
-
     // 记录使用量
     if let Some(usage) = TokenUsage::from_claude_response(&anthropic_response) {
         let model = anthropic_response
@@ -265,8 +236,6 @@ async fn handle_claude_transform(
         });
     }
 
-    log::info!("[Claude] ====== 请求结束 ======");
-
     // 构建响应
     let mut builder = axum::response::Response::builder().status(status);
 
@@ -285,11 +254,6 @@ async fn handle_claude_transform(
         ProxyError::TransformError(format!("Failed to serialize response: {e}"))
     })?;
 
-    log::info!(
-        "[Claude] 返回转换后的响应, 长度: {} bytes",
-        response_body.len()
-    );
-
     let body = axum::body::Body::from(response_body);
     builder.body(body).map_err(|e| {
         log::error!("[Claude] 构建响应失败: {e}");
@@ -307,8 +271,6 @@ pub async fn handle_chat_completions(
     headers: axum::http::HeaderMap,
     Json(body): Json<Value>,
 ) -> Result<axum::response::Response, ProxyError> {
-    log::info!("[Codex] ====== /v1/chat/completions 请求开始 ======");
-
     let mut ctx =
         RequestContext::new(&state, &body, &headers, AppType::Codex, "Codex", "codex").await?;
 
@@ -317,12 +279,6 @@ pub async fn handle_chat_completions(
         .and_then(|v| v.as_bool())
         .unwrap_or(false);
 
-    log::info!(
-        "[Codex] 请求模型: {}, 流式: {}",
-        ctx.request_model,
-        is_stream
-    );
-
     let forwarder = ctx.create_forwarder(&state);
     let result = match forwarder
         .forward_with_retry(
@@ -347,8 +303,6 @@ pub async fn handle_chat_completions(
     ctx.provider = result.provider;
     let response = result.response;
 
-    log::info!("[Codex] 上游响应状态: {}", response.status());
-
     process_response(response, &ctx, &state, &OPENAI_PARSER_CONFIG).await
 }
 
@@ -390,8 +344,6 @@ pub async fn handle_responses(
     ctx.provider = result.provider;
     let response = result.response;
 
-    log::info!("[Codex] 上游响应状态: {}", response.status());
-
     process_response(response, &ctx, &state, &CODEX_PARSER_CONFIG).await
 }
 
@@ -417,8 +369,6 @@ pub async fn handle_gemini(
         .map(|pq| pq.as_str())
         .unwrap_or(uri.path());
 
-    log::info!("[Gemini] 请求端点: {endpoint}");
-
     let is_stream = body
         .get("stream")
         .and_then(|v| v.as_bool())
@@ -448,8 +398,6 @@ pub async fn handle_gemini(
     ctx.provider = result.provider;
     let response = result.response;
 
-    log::info!("[Gemini] 上游响应状态: {}", response.status());
-
     process_response(response, &ctx, &state, &GEMINI_PARSER_CONFIG).await
 }
 
@@ -508,7 +456,12 @@ async fn log_usage(
         Ok(Some(p)) => {
             if let Some(meta) = p.meta {
                 if let Some(cm) = meta.cost_multiplier {
-                    Decimal::from_str(&cm).unwrap_or(Decimal::from(1))
+                    Decimal::from_str(&cm).unwrap_or_else(|e| {
+                        log::warn!(
+                            "cost_multiplier 解析失败 (provider_id={provider_id}): {cm} - {e}"
+                        );
+                        Decimal::from(1)
+                    })
                 } else {
                     Decimal::from(1)
                 }
@@ -535,6 +488,6 @@ async fn log_usage(
         None, // provider_type
         is_streaming,
     ) {
-        log::warn!("记录使用量失败: {e}");
+        log::warn!("[USG-001] 记录使用量失败: {e}");
     }
 }