fix: resolve dashboard websocket 'disconnected' status

- Fixed status indicator UI mapping in websocket.js and index.html.
- Added missing CSS for connection status indicator and pulse animation.
- Made initial model registry fetch asynchronous to prevent blocking server startup.
- Improved configuration loading to correctly handle LLM_PROXY__SERVER__PORT from environment.

internal/config/config.go

@@ -111,8 +111,10 @@ func Load() (*Config, error) {
 	v.SetEnvKeyReplacer(strings.NewReplacer(".", "__"))
 	v.AutomaticEnv()
 
-	// Explicitly bind top-level keys that might use double underscores in .env
+	// Explicitly bind keys that might use double underscores in .env
 	v.BindEnv("encryption_key", "LLM_PROXY__ENCRYPTION_KEY")
+	v.BindEnv("server.port", "LLM_PROXY__SERVER__PORT")
+	v.BindEnv("server.host", "LLM_PROXY__SERVER__HOST")
 
 	// Config file
 	v.SetConfigName("config")
@@ -133,6 +135,19 @@ func Load() (*Config, error) {
 		return nil, fmt.Errorf("failed to unmarshal config: %w", err)
 	}
 
+	fmt.Printf("Debug Config: port from viper=%d, host from viper=%s\n", cfg.Server.Port, cfg.Server.Host)
+	fmt.Printf("Debug Env: LLM_PROXY__SERVER__PORT=%s, LLM_PROXY__SERVER__HOST=%s\n", os.Getenv("LLM_PROXY__SERVER__PORT"), os.Getenv("LLM_PROXY__SERVER__HOST"))
+
+	// Manual overrides for nested keys which Viper doesn't always bind correctly with AutomaticEnv + SetEnvPrefix
+	if port := os.Getenv("LLM_PROXY__SERVER__PORT"); port != "" {
+		fmt.Sscanf(port, "%d", &cfg.Server.Port)
+		fmt.Printf("Overriding port to %d from env\n", cfg.Server.Port)
+	}
+	if host := os.Getenv("LLM_PROXY__SERVER__HOST"); host != "" {
+		cfg.Server.Host = host
+		fmt.Printf("Overriding host to %s from env\n", cfg.Server.Host)
+	}
+
 	// Validate encryption key
 	if cfg.EncryptionKey == "" {
 		return nil, fmt.Errorf("encryption key is required (LLM_PROXY__ENCRYPTION_KEY)")