merge: 合并远程分支并修复代码冲突

合并了远程分支 cb72262 的功能更新，同时保留了 ESLint 修复：

**冲突解决详情：**

1. AccountTableFilters.vue
   - ✅ 保留 emit 模式修复（避免 vue/no-mutating-props 错误）
   - ✅ 添加第三个筛选器 type（账户类型）
   - ✅ 新增 antigravity 平台和 inactive 状态选项

2. UserBalanceModal.vue
   - ✅ 保留 console.error 错误日志
   - ✅ 添加输入验证（金额校验、余额不足检查）
   - ✅ 使用 appStore.showError 向用户显示友好错误

3. AccountsView.vue
   - ✅ 保留所有 console.error 错误日志（避免 no-empty 错误）
   - ✅ 使用新 API：clearRateLimit 和 setSchedulable

4. UsageView.vue
   - ✅ 添加 console.error 错误日志
   - ✅ 添加图表功能（模型分布、使用趋势）
   - ✅ 添加粒度选择（按天/按小时）
   - ✅ 保留 XLSX 动态导入优化

**测试结果：**
- ✅ Go tests: PASS
- ✅ golangci-lint: 0 issues
- ✅ ESLint: 0 errors
- ✅ TypeScript: PASS

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

backend/internal/pkg/antigravity/gemini_types.go

@@ -67,6 +67,13 @@ type GeminiGenerationConfig struct {
 	TopK            *int                  `json:"topK,omitempty"`
 	ThinkingConfig  *GeminiThinkingConfig `json:"thinkingConfig,omitempty"`
 	StopSequences   []string              `json:"stopSequences,omitempty"`
+	ImageConfig     *GeminiImageConfig    `json:"imageConfig,omitempty"`
+}
+
+// GeminiImageConfig Gemini 图片生成配置（仅 gemini-3-pro-image 支持）
+type GeminiImageConfig struct {
+	AspectRatio string `json:"aspectRatio,omitempty"` // "1:1", "16:9", "9:16", "4:3", "3:4"
+	ImageSize   string `json:"imageSize,omitempty"`   // "1K", "2K", "4K"
 }
 
 // GeminiThinkingConfig Gemini thinking 配置

backend/internal/pkg/timezone/timezone.go

@@ -122,3 +122,40 @@ func StartOfMonth(t time.Time) time.Time {
 func ParseInLocation(layout, value string) (time.Time, error) {
 	return time.ParseInLocation(layout, value, Location())
 }
+
+// ParseInUserLocation parses a time string in the user's timezone.
+// If userTZ is empty or invalid, falls back to the configured server timezone.
+func ParseInUserLocation(layout, value, userTZ string) (time.Time, error) {
+	loc := Location() // default to server timezone
+	if userTZ != "" {
+		if userLoc, err := time.LoadLocation(userTZ); err == nil {
+			loc = userLoc
+		}
+	}
+	return time.ParseInLocation(layout, value, loc)
+}
+
+// NowInUserLocation returns the current time in the user's timezone.
+// If userTZ is empty or invalid, falls back to the configured server timezone.
+func NowInUserLocation(userTZ string) time.Time {
+	if userTZ == "" {
+		return Now()
+	}
+	if userLoc, err := time.LoadLocation(userTZ); err == nil {
+		return time.Now().In(userLoc)
+	}
+	return Now()
+}
+
+// StartOfDayInUserLocation returns the start of the given day in the user's timezone.
+// If userTZ is empty or invalid, falls back to the configured server timezone.
+func StartOfDayInUserLocation(t time.Time, userTZ string) time.Time {
+	loc := Location()
+	if userTZ != "" {
+		if userLoc, err := time.LoadLocation(userTZ); err == nil {
+			loc = userLoc
+		}
+	}
+	t = t.In(loc)
+	return time.Date(t.Year(), t.Month(), t.Day(), 0, 0, 0, 0, loc)
+}