fix: normalize provider names in model pricing table

Mapped registry provider IDs (google, xai) to proxy-internal names (gemini, grok) for better dashboard consistency.

internal/server/dashboard.go

@@ -954,6 +954,12 @@ func (s *Server) handleTestProvider(c *gin.Context) {
 func (s *Server) handleGetModels(c *gin.Context) {
 	usedOnly := c.Query("used_only") == "true"
 
+	// Provider name mapping (Registry -> Proxy)
+	providerMap := map[string]string{
+		"google": "gemini",
+		"xai":    "grok",
+	}
+
 	// Merge registry models with DB overrides
 	var dbModels []db.ModelConfig
 	_ = s.database.Select(&dbModels, "SELECT * FROM model_configs")
@@ -981,6 +987,12 @@ func (s *Server) handleGetModels(c *gin.Context) {
 	var result []gin.H
 	if s.registry != nil {
 		for pID, pInfo := range s.registry.Providers {
+			// Normalize provider name for UI
+			uiProvider := pID
+			if mapped, ok := providerMap[pID]; ok {
+				uiProvider = mapped
+			}
+
 			for mID, mMeta := range pInfo.Models {
 				// Filter if used_only requested
 				if usedOnly && !usedModels[mID] {
@@ -1026,7 +1038,7 @@ func (s *Server) handleGetModels(c *gin.Context) {
 				result = append(result, gin.H{
 					"id":               mID,
 					"name":             mMeta.Name,
-					"provider":         pID,
+					"provider":         uiProvider,
 					"enabled":          enabled,
 					"prompt_cost":      promptCost,
 					"completion_cost":  completionCost,