fix: 修复统计报表在移动端的溢出问题

- MileageModule 减少移动端 padding (p-6→p-3)
- StatisticsView 添加 overflow-x-hidden 防止横向溢出
- 图表容器添加 overflow-hidden
- 减少图表右侧 margin 防止标签被截断

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/modules/mileage/MileageModule.tsx

@@ -9,8 +9,8 @@ export default function MileageModule() {
   const [activeSubTab, setActiveSubTab] = useState<'monitoring' | 'statistics' | 'report'>('monitoring');
 
   return (
-    <div className="min-h-screen bg-[#F8F9FB] text-gray-800 font-sans p-6 relative">
-      <div className="max-w-6xl mx-auto flex flex-col gap-3 pb-16 px-1 landscape:pb-0 landscape:h-full landscape:flex-1 landscape:overflow-hidden">
+    <div className="min-h-screen bg-[#F8F9FB] text-gray-800 font-sans p-3 md:p-6 relative overflow-x-hidden">
+      <div className="max-w-6xl mx-auto flex flex-col gap-3 pb-16 landscape:pb-0 landscape:h-full landscape:flex-1 landscape:overflow-hidden">
         {/* Sub-navigation */}
         <div className="bg-white px-4 py-2 rounded-2xl border border-slate-100 shadow-sm flex items-center gap-6">
           <button

src/modules/mileage/StatisticsView.tsx

@@ -57,7 +57,7 @@ export default function StatisticsView() {
   }, [selectedTargetId]);
 
   return (
-    <div className="space-y-2 pb-2 landscape:pb-4 landscape:h-full landscape:overflow-hidden landscape:flex landscape:flex-col flex-none landscape:flex-1">
+    <div className="space-y-2 pb-2 landscape:pb-4 landscape:h-full landscape:overflow-hidden landscape:flex landscape:flex-col flex-none landscape:flex-1 overflow-x-hidden">
       {/* Project Selector - Full width even in landscape */}
       <div className="bg-white landscape:bg-slate-900/50 landscape:border-slate-800 p-2 rounded-2xl shadow-sm border border-slate-100 flex gap-1 overflow-x-auto no-scrollbar flex-shrink-0">
         {targets.map(target => (
@@ -110,7 +110,7 @@ export default function StatisticsView() {
             </div>
           </div>
 
-          <div className="bg-white landscape:bg-slate-900/40 landscape:border-slate-800 p-4 rounded-2xl shadow-sm border border-slate-100 flex-1 flex flex-col min-h-[300px]">
+          <div className="bg-white landscape:bg-slate-900/40 landscape:border-slate-800 p-4 rounded-2xl shadow-sm border border-slate-100 flex-1 flex flex-col min-h-[300px] overflow-hidden">
             <div className="flex items-center justify-between mb-4">
               <div className="flex items-center gap-2">
                 <div className="w-1 h-4 bg-blue-600 rounded-full" />
@@ -134,7 +134,7 @@ export default function StatisticsView() {
               <div className="absolute inset-0">
                 <ResponsiveContainer width="100%" height="100%">
                 {chartType === 'bar' ? (
-                  <BarChart data={trendData} margin={{ top: 20, right: 30, left: 0, bottom: 0 }}>
+                  <BarChart data={trendData} margin={{ top: 20, right: 10, left: 0, bottom: 0 }}>
                     <CartesianGrid strokeDasharray="3 3" vertical={false} stroke="#f1f5f9" strokeOpacity={0.1} />
                     <XAxis dataKey="date" axisLine={false} tickLine={false} tick={{ fontSize: 10, fill: '#94a3b8' }} dy={10} tickFormatter={(val) => val.split('-')[1]} />
                     <YAxis axisLine={false} tickLine={false} tick={{ fontSize: 10, fill: '#94a3b8' }} />
@@ -147,7 +147,7 @@ export default function StatisticsView() {
                     </Bar>
                   </BarChart>
                 ) : chartType === 'line' ? (
-                  <LineChart data={trendData} margin={{ top: 20, right: 30, left: 0, bottom: 0 }}>
+                  <LineChart data={trendData} margin={{ top: 20, right: 10, left: 0, bottom: 0 }}>
                     <CartesianGrid strokeDasharray="3 3" vertical={false} stroke="#f1f5f9" strokeOpacity={0.1} />
                     <XAxis dataKey="date" axisLine={false} tickLine={false} tick={{ fontSize: 10, fill: '#94a3b8' }} dy={10} tickFormatter={(val) => val.split('-')[1]} />
                     <YAxis axisLine={false} tickLine={false} tick={{ fontSize: 10, fill: '#94a3b8' }} />
@@ -157,7 +157,7 @@ export default function StatisticsView() {
                     </Line>
                   </LineChart>
                 ) : (
-                  <AreaChart data={trendData} margin={{ top: 20, right: 30, left: 0, bottom: 0 }}>
+                  <AreaChart data={trendData} margin={{ top: 20, right: 10, left: 0, bottom: 0 }}>
                     <defs>
                       <linearGradient id="colorMileage" x1="0" y1="0" x2="0" y2="1">
                         <stop offset="5%" stopColor="#3b82f6" stopOpacity={0.3}/>