feat(frontend): improve dashboard UI and add plan tier badges

- Fix rate-limit card 5h/7d spacing by removing min-width constraint
- Align model ranking chart leftward by reducing Y-axis width
- Add colored plan badges (Pro/ProLite/Plus/Team/Free) with tier-based color depth
- Remove local rate-limit pre-check from connection test flow
- Add translator response normalization support

Author: james-6-23

admin/test_connection.go

@@ -74,11 +74,6 @@ func (h *Handler) TestConnection(c *gin.Context) {
 	// 发送 test_start
 	sendTestEvent(c, testEvent{Type: "test_start", Model: testModel})
 
-	if resetAt, ok := activeLocalRateLimitReset(account); ok && !forceConnectionTest(c) {
-		sendTestEvent(c, testEvent{Type: "error", Error: formatLocalRateLimitTestError(resetAt)})
-		return
-	}
-
 	// 构建最小测试请求体（参考 sub2api createOpenAITestPayload）
 	payload := buildTestPayload(testModel)
 
@@ -229,44 +224,6 @@ func buildTestPayload(model string) []byte {
 	return payload
 }
 
-func forceConnectionTest(c *gin.Context) bool {
-	if c == nil {
-		return false
-	}
-	switch strings.ToLower(strings.TrimSpace(c.Query("force"))) {
-	case "1", "true", "yes":
-		return true
-	default:
-		return false
-	}
-}
-
-func activeLocalRateLimitReset(account *auth.Account) (time.Time, bool) {
-	if account == nil {
-		return time.Time{}, false
-	}
-	now := time.Now()
-	if account.IsPremium5hRateLimited() {
-		_, resetAt, ok := account.GetUsageSnapshot5h()
-		if ok && resetAt.After(now) {
-			return resetAt, true
-		}
-	}
-	reason, until := account.GetCooldownSnapshot()
-	if reason == "rate_limited" && until.After(now) {
-		return until, true
-	}
-	return time.Time{}, false
-}
-
-func formatLocalRateLimitTestError(resetAt time.Time) string {
-	remaining := time.Until(resetAt).Round(time.Second)
-	if remaining < 0 {
-		remaining = 0
-	}
-	return fmt.Sprintf("账号当前处于本地限流状态，预计 %s 后恢复；本次未发送上游探针。需要强制探针时可添加 force=1。", remaining)
-}
-
 func formatUsageLimitedTestError(state proxy.CodexUsageSyncResult) (string, bool) {
 	if state.Premium5hRateLimited {
 		remaining := time.Until(state.Reset5hAt).Round(time.Second)
@@ -523,11 +480,6 @@ func (h *Handler) BatchTest(c *gin.Context) {
 			sem <- struct{}{}
 			defer func() { <-sem }()
 
-			if _, ok := activeLocalRateLimitReset(acc); ok {
-				atomic.AddInt64(&rateLimitCount, 1)
-				return
-			}
-
 			resp, err := proxy.ExecuteRequest(context.Background(), acc, payload, "", h.store.ResolveProxyForAccount(acc), "", nil, nil)
 			if err != nil {
 				h.store.MarkError(acc, "批量测试请求失败: "+err.Error())

admin/test_connection_test.go

@@ -5,7 +5,6 @@ import (
 	"testing"
 	"time"
 
-	"github.com/codex2api/auth"
 	"github.com/codex2api/proxy"
 	"github.com/tidwall/gjson"
 )
@@ -32,24 +31,6 @@ func TestBuildTestPayloadUsesSelectedModel(t *testing.T) {
 	}
 }
 
-func TestActiveLocalRateLimitResetDetectsPremium5h(t *testing.T) {
-	resetAt := time.Now().Add(30 * time.Minute)
-	acc := &auth.Account{
-		PlanType:            "plus",
-		UsagePercent5h:      100,
-		UsagePercent5hValid: true,
-		Reset5hAt:           resetAt,
-	}
-
-	got, ok := activeLocalRateLimitReset(acc)
-	if !ok {
-		t.Fatal("activeLocalRateLimitReset() ok = false, want true")
-	}
-	if !got.Equal(resetAt) {
-		t.Fatalf("resetAt = %v, want %v", got, resetAt)
-	}
-}
-
 func TestFormatUsageLimitedTestErrorReportsSuccessfulProbeAsLimited(t *testing.T) {
 	msg, limited := formatUsageLimitedTestError(proxy.CodexUsageSyncResult{
 		Premium5hRateLimited: true,

frontend/src/components/DashboardUsageCharts.tsx

@@ -301,10 +301,10 @@ export default function DashboardUsageCharts({
 
           <ChartCard title={t('dashboard.modelRanking')} description={t('dashboard.modelRankingDesc')}>
             <ResponsiveContainer width="100%" height="100%">
-              <BarChart data={displayData.modelData} layout="vertical" margin={{ top: 8, right: 12, left: 8, bottom: 0 }}>
+              <BarChart data={displayData.modelData} layout="vertical" margin={{ top: 8, right: 12, left: 0, bottom: 0 }}>
                 <CartesianGrid horizontal={false} stroke={gridColor} strokeDasharray="4 4" />
                 <XAxis type="number" tickFormatter={formatCompactNumber} tick={{ fill: axisColor, fontSize: 12 }} axisLine={{ stroke: gridColor }} tickLine={{ stroke: gridColor }} allowDecimals={false} />
-                <YAxis dataKey="shortModel" type="category" width={128} tick={{ fill: axisColor, fontSize: 12 }} axisLine={{ stroke: gridColor }} tickLine={{ stroke: gridColor }} />
+                <YAxis dataKey="shortModel" type="category" width={80} tick={{ fill: axisColor, fontSize: 12 }} axisLine={{ stroke: gridColor }} tickLine={{ stroke: gridColor }} />
                 <Tooltip
                   position={{ y: 10 }}
                   formatter={(value) => formatNumber(value)}