feat logging: Implement LOG_LEVEL configuration option and improve logging consistency

- Add LOG_LEVEL configuration option to control logging verbosity
- Update UI to include LOG_LEVEL dropdown in settings
- Fix logging inconsistency between environment variables and config file
- Unify logging configuration to use config file settings
- Maintain separate logging systems for different purposes:
  * Server-level logs (HTTP requests, API calls) using pino in ~/.claude-code-router/logs/
  * Application-level logs (routing decisions, business logic) in ~/.claude-code-router/claude-code-router.log
- Update documentation with accurate logging system information
- Add detailed information about dual logging systems in README.md and README_zh.md
- Improve type safety and validation in ConfigProvider

Co-authored-by: qwen-cli <https://github.com/QwenLM/qwen-code>

ui/src/components/ConfigProvider.tsx

@@ -69,6 +69,7 @@ export function ConfigProvider({ children }: ConfigProviderProps) {
         // Validate the received data to ensure it has the expected structure
         const validConfig = {
           LOG: typeof data.LOG === 'boolean' ? data.LOG : false,
+          LOG_LEVEL: typeof data.LOG_LEVEL === 'string' ? data.LOG_LEVEL : 'info',
           CLAUDE_PATH: typeof data.CLAUDE_PATH === 'string' ? data.CLAUDE_PATH : '',
           HOST: typeof data.HOST === 'string' ? data.HOST : '127.0.0.1',
           PORT: typeof data.PORT === 'number' ? data.PORT : 3456,
@@ -103,6 +104,7 @@ export function ConfigProvider({ children }: ConfigProviderProps) {
           // Set default empty config when fetch fails
           setConfig({
             LOG: false,
+            LOG_LEVEL: 'info',
             CLAUDE_PATH: '',
             HOST: '127.0.0.1',
             PORT: 3456,

ui/src/components/SettingsDialog.tsx

@@ -11,6 +11,7 @@ import { Button } from "@/components/ui/button";
 import { Input } from "@/components/ui/input";
 import { Label } from "@/components/ui/label";
 import { Switch } from "@/components/ui/switch";
+import { Combobox } from "@/components/ui/combobox";
 import { useConfig } from "./ConfigProvider";
 
 interface SettingsDialogProps {
@@ -45,6 +46,21 @@ export function SettingsDialog({ isOpen, onOpenChange }: SettingsDialogProps) {
             <Switch id="log" checked={config.LOG} onCheckedChange={handleLogChange} />
             <Label htmlFor="log" className="transition-all-ease hover:scale-[1.02] cursor-pointer">{t("toplevel.log")}</Label>
           </div>
+          <div className="space-y-2">
+            <Label htmlFor="log-level" className="transition-all-ease hover:scale-[1.01] cursor-pointer">{t("toplevel.log_level")}</Label>
+            <Combobox
+              options={[
+                { label: "fatal", value: "fatal" },
+                { label: "error", value: "error" },
+                { label: "warn", value: "warn" },
+                { label: "info", value: "info" },
+                { label: "debug", value: "debug" },
+                { label: "trace", value: "trace" },
+              ]}
+              value={config.LOG_LEVEL}
+              onChange={(value) => setConfig({ ...config, LOG_LEVEL: value })}
+            />
+          </div>
           <div className="space-y-2">
             <Label htmlFor="claude-path" className="transition-all-ease hover:scale-[1.01] cursor-pointer">{t("toplevel.claude_path")}</Label>
             <Input id="claude-path" value={config.CLAUDE_PATH} onChange={handlePathChange} className="transition-all-ease focus:scale-[1.01]" />

ui/src/locales/en.json

@@ -36,6 +36,7 @@
   "toplevel": {
     "title": "General Settings",
     "log": "Enable Logging",
+    "log_level": "Log Level",
     "claude_path": "Claude Path",
     "host": "Host",
     "port": "Port",

ui/src/locales/zh.json

@@ -36,6 +36,7 @@
   "toplevel": {
     "title": "通用设置",
     "log": "启用日志",
+    "log_level": "日志级别",
     "claude_path": "Claude 路径",
     "host": "主机",
     "port": "端口",

ui/src/types.ts

@@ -33,6 +33,7 @@ export interface Config {
   transformers: Transformer[];
   // Top-level settings
   LOG: boolean;
+  LOG_LEVEL: string;
   CLAUDE_PATH: string;
   HOST: string;
   PORT: number;