v0.2.2

Added

• Editable budget & balance: click values in the stats view to edit inline (Enter saves / Esc cancels); balance decreases locally with estimated token consumption, falls back to the API balance when unset
• Current cost in the footer: cumulative estimated cost shown bottom-right
• Peak rate readout: peak consumption rate (t/s) above the live curve

Changed

• UI layout rework: enlarged section captions (13px), big-number hierarchy + segmented controls, keeping the tech feel
• Session list shows only the current session by default
• Daily / monthly detail lists collapsed by default

Fixed

• Removed the stats view's old flat layout and border lines

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新增

• 可编辑预算与余额：统计视图点击数值行内编辑（回车保存 / Esc 取消）；余额按 token 消耗本地估算递减，未设置时回退 API 余额
• 底部显示当前花费：面板底部右侧统一显示累计估算花费
• 峰值读数：实时趋势区显示窗口内峰值消耗速率（t/s）

变更

• UI 排版重构：分区小标题加大（13px）、大数字层级 + 分段控件，保留科技感
• 会话列表默认只显示当前会话，展开才显示全部
• 按日 / 按月明细默认收起（0 行），点击展开全部

修复

• 移除统计视图旧的平铺布局与边框线（改留白分区）