feat: 新增应用配置管理模块并实现用户认证处理器，支持环境配置加载和GitHub OAuth。

internal/config/config.go

@@ -47,24 +47,24 @@ type Config struct {
 	FrontendURL        string
 
 	// AI configuration (OpenAI compatible)
-	OpenAIAPIKey   string
-	OpenAIBaseURL  string
-	WhisperModel   string
-	ChatModel      string
+	OpenAIAPIKey     string
+	OpenAIBaseURL    string
+	WhisperModel     string
+	ChatModel        string
 	AISessionTimeout time.Duration
 
 	// Image upload configuration
-	ImageUploadDir     string
-	MaxImageSize       int64
-	AllowedImageTypes  string
-	MaxImagesPerTx     int
+	ImageUploadDir    string
+	MaxImageSize      int64
+	AllowedImageTypes string
+	MaxImagesPerTx    int
 }
 
 // Load loads configuration from environment variables
 func Load() *Config {
 	cfg := &Config{
 		// Server
-		ServerPort:  getEnv("SERVER_PORT", "8080"),
+		ServerPort:  getEnv("SERVER_PORT", "2612"),
 		Environment: getEnv("ENVIRONMENT", "development"),
 
 		// Data directory
@@ -99,7 +99,7 @@ func Load() *Config {
 		GitHubClientID:     getEnv("GITHUB_CLIENT_ID", ""),
 		GitHubClientSecret: getEnv("GITHUB_CLIENT_SECRET", ""),
 		GitHubRedirectURL:  getEnv("GITHUB_REDIRECT_URL", ""),
-		FrontendURL:        getEnv("FRONTEND_URL", "http://localhost:5173"),
+		FrontendURL:        getEnv("FRONTEND_URL", "http://localhost:2613"),
 
 		// AI (OpenAI compatible)
 		OpenAIAPIKey:     getEnv("OPENAI_API_KEY", ""),