fix(frontend): keep mobile batch toolbar right-aligned (#203)

## Summary
- keep mobile batch action bars visually right-aligned while preserving
Android horizontal swipe behavior
- move overflow handling to an outer scroller and keep action layout in
an inner `min-w-full` flex row
- apply the same structure across forward, node, and tunnel pages for
consistent behavior

## Verification
- `npm run build` *(fails due to pre-existing issue: `src/main.tsx`
cannot find module `virtual:pwa-register`)*
- `npm run lint -- src/pages/forward.tsx src/pages/node.tsx
src/pages/tunnel.tsx` *(fails due to pre-existing a11y labels in
`forward.tsx` lines 3202/3223)*

vite-frontend/src/pages/forward.tsx

@@ -1722,7 +1722,8 @@ export default function ForwardPage() {
             onOpen={() => setIsSearchVisible(true)}
           />
         </div>
-        <div className="flex min-h-9 min-w-0 max-w-full items-center justify-start gap-2 overflow-x-auto whitespace-nowrap touch-pan-x sm:justify-end sm:gap-3 [&>*]:shrink-0">
+        <div className="min-h-9 min-w-0 max-w-full overflow-x-auto touch-pan-x">
+          <div className="flex min-h-9 w-max min-w-full items-center justify-end gap-2 whitespace-nowrap sm:gap-3 [&>*]:shrink-0">
             {selectMode ? (
               <>
                 <span className="text-sm text-default-600 shrink-0">
@@ -1923,6 +1924,7 @@ export default function ForwardPage() {
             )}
           </div>
         </div>
+      </div>
 
       {/* 根据显示模式渲染不同内容 */}
       {viewMode === "grouped" ? (

vite-frontend/src/pages/node.tsx

@@ -1075,7 +1075,8 @@ export default function NodePage() {
           />
         </div>
 
-        <div className="flex min-h-9 min-w-0 max-w-full items-center justify-start gap-2 overflow-x-auto whitespace-nowrap touch-pan-x sm:justify-end [&>*]:shrink-0">
+        <div className="min-h-9 min-w-0 max-w-full overflow-x-auto touch-pan-x">
+          <div className="flex min-h-9 w-max min-w-full items-center justify-end gap-2 whitespace-nowrap [&>*]:shrink-0">
             {selectMode ? (
               <>
                 <span className="text-sm text-default-600 shrink-0">
@@ -1148,6 +1149,7 @@ export default function NodePage() {
             )}
           </div>
         </div>
+      </div>
 
       {!wsConnected && (
         <Alert

vite-frontend/src/pages/tunnel.tsx

@@ -710,7 +710,8 @@ export default function TunnelPage() {
           />
         </div>
 
-        <div className="flex min-h-9 min-w-0 max-w-full items-center justify-start gap-2 overflow-x-auto whitespace-nowrap touch-pan-x sm:justify-end [&>*]:shrink-0">
+        <div className="min-h-9 min-w-0 max-w-full overflow-x-auto touch-pan-x">
+          <div className="flex min-h-9 w-max min-w-full items-center justify-end gap-2 whitespace-nowrap [&>*]:shrink-0">
             {selectMode ? (
               <>
                 <span className="text-sm text-default-600 shrink-0">
@@ -783,6 +784,7 @@ export default function TunnelPage() {
             )}
           </div>
         </div>
+      </div>
 
       {/* 隧道卡片网格 */}
       {tunnels.length > 0 ? (