fix: improve provider and model data accuracy in dashboard

Updated handleGetProviders to include available models and last-used timestamps. Refined Model Pricing table to strictly filter by core providers and actual usage.

internal/server/dashboard.go

@@ -859,6 +859,28 @@ func (s *Server) handleGetProviders(c *gin.Context) {
 			}
 		}
 
+		// Get last used for this provider
+		var lastUsedTime sql.NullTime
+		_ = s.database.Get(&lastUsedTime, "SELECT MAX(timestamp) FROM llm_requests WHERE provider = ?", id)
+		var lastUsed interface{}
+		if lastUsedTime.Valid && !lastUsedTime.Time.IsZero() {
+			lastUsed = lastUsedTime.Time
+		}
+
+		// Get models for this provider from registry
+		var models []string
+		if s.registry != nil {
+			registryID := id
+			if id == "gemini" { registryID = "google" }
+			if id == "grok" { registryID = "xai" }
+			
+			if pInfo, ok := s.registry.Providers[registryID]; ok {
+				for mID := range pInfo.Models {
+					models = append(models, mID)
+				}
+			}
+		}
+
 		result = append(result, gin.H{
 			"id":                   id,
 			"name":                 name,
@@ -868,6 +890,8 @@ func (s *Server) handleGetProviders(c *gin.Context) {
 			"credit_balance":       balance,
 			"low_credit_threshold": threshold,
 			"billing_mode":         billingMode,
+			"last_used":            lastUsed,
+			"models":               models,
 		})
 	}
 

static/css/dashboard.css

@@ -329,6 +329,25 @@ body {
     font-size: 1.125rem;
 }
 
+/* Badges */
+.badge {
+    display: inline-block;
+    padding: 0.25rem 0.5rem;
+    font-size: 0.75rem;
+    font-weight: 600;
+    line-height: 1;
+    text-align: center;
+    white-space: nowrap;
+    vertical-align: baseline;
+    border-radius: 4px;
+}
+
+.badge-success { background-color: rgba(152, 151, 26, 0.15); color: var(--green-light); border: 1px solid var(--green); }
+.badge-info { background-color: rgba(69, 133, 136, 0.15); color: var(--blue-light); border: 1px solid var(--blue); }
+.badge-warning { background-color: rgba(215, 153, 33, 0.15); color: var(--yellow-light); border: 1px solid var(--yellow); }
+.badge-danger { background-color: rgba(204, 36, 29, 0.15); color: var(--red-light); border: 1px solid var(--red); }
+.badge-client { background-color: var(--bg2); color: var(--fg1); border: 1px solid var(--bg3); padding: 2px 6px; font-size: 0.7rem; text-transform: uppercase; }
+
 /* Responsive Login */
 @media (max-width: 480px) {
     .login-card {