fix(ui): improve date input parsing and add missing back navigation (#284)

## Summary
- Improve DatePicker text parsing to accept more input formats
(including `YYYYMMDD`) without requiring explicit separators
- Add missing H5 back-navigation for panel-sharing by using simple
layout route
- Add a back button on config page with history fallback (`navigate(-1)`
then `/profile`)

## Why
These are usability/accessibility improvements that are generic and not
project-brand specific:
- Mobile keyboards may not easily input `-` in date fields
- Certain pages in H5 lacked a consistent return path
- Config page had no explicit in-page back action

## Scope
- `vite-frontend/src/shadcn-bridge/heroui/date-picker.tsx`
- `vite-frontend/src/App.tsx`
- `vite-frontend/src/pages/config.tsx`

## Notes
No branding/identity/ownership/visual-theme customizations included in
this PR.

plans/017-pr-284-ui-followup-fixes.md

@@ -0,0 +1,16 @@
+# 017 PR 284 UI Follow-up Fixes
+
+## Checklist
+
+- [x] Review the current frontend route and component state related to PR 284 follow-up fixes.
+- [x] Restore the intended H5 simple-layout route behavior for panel sharing.
+- [x] Improve date text parsing to support separator-free and flexible formats without ambiguous fallbacks.
+- [x] Add config-page back navigation with a safer history fallback and shared icon usage.
+- [x] Run focused frontend verification for the updated files and record the result.
+
+## Test Record
+
+- Command: `cd vite-frontend && npm install`
+- Result: passed.
+- Command: `cd vite-frontend && npm run build`
+- Result: passed.

vite-frontend/src/App.tsx

@@ -188,7 +188,7 @@ function App() {
       />
       <Route
         element={
-          <ProtectedRoute>
+          <ProtectedRoute useSimpleLayout={true}>
             <PanelSharingPage />
           </ProtectedRoute>
         }

vite-frontend/src/components/icons.tsx

@@ -259,3 +259,29 @@ export const SettingsIcon = ({
     />
   </svg>
 );
+
+export const BackIcon = ({
+  size = 24,
+  width,
+  height,
+  ...props
+}: IconSvgProps) => (
+  <svg
+    aria-hidden="true"
+    focusable="false"
+    height={size || height}
+    role="presentation"
+    viewBox="0 0 24 24"
+    width={size || width}
+    {...props}
+  >
+    <path
+      d="M15 19l-7-7 7-7"
+      fill="none"
+      stroke="currentColor"
+      strokeLinecap="round"
+      strokeLinejoin="round"
+      strokeWidth="2"
+    />
+  </svg>
+);

vite-frontend/src/layouts/h5-simple.tsx

@@ -2,6 +2,7 @@ import React from "react";
 import { useNavigate } from "react-router-dom";
 
 import { Button } from "@/shadcn-bridge/heroui/button";
+import { BackIcon } from "@/components/icons";
 import { BrandLogo } from "@/components/brand-logo";
 import { siteConfig } from "@/config/site";
 import { useScrollTopOnPathChange } from "@/hooks/useScrollTopOnPathChange";
@@ -25,13 +26,7 @@ export default function H5SimpleLayout({
       <header className="bg-white dark:bg-black shadow-sm border-b border-gray-200 dark:border-gray-600 h-14 safe-top flex-shrink-0 flex items-center justify-between px-4 relative z-10">
         <div className="flex items-center gap-2">
           <Button isIconOnly size="sm" variant="light" onPress={handleBack}>
-            <svg className="w-5 h-5" fill="currentColor" viewBox="0 0 20 20">
+            <BackIcon className="w-5 h-5" />
-              <path
-                clipRule="evenodd"
-                d="M12.707 5.293a1 1 0 010 1.414L9.414 10l3.293 3.293a1 1 0 01-1.414 1.414l-4-4a1 1 0 010-1.414l4-4a1 1 0 011.414 0z"
-                fillRule="evenodd"
-              />
-            </svg>
           </Button>
           <BrandLogo size={20} />
           <h1 className="text-sm font-bold text-foreground">

vite-frontend/src/pages/config.tsx

@@ -26,7 +26,7 @@ import {
   updateAnnouncement,
   type AnnouncementData,
 } from "@/api";
-import { SettingsIcon } from "@/components/icons";
+import { BackIcon, SettingsIcon } from "@/components/icons";
 import { isAdmin } from "@/utils/auth";
 import { getCachedConfigs, configCache, updateSiteConfig } from "@/config/site";
 import {
@@ -234,6 +234,21 @@ export default function ConfigPage() {
     Partial<Record<BrandPreviewKey, boolean>>
   >({});
 
+  const canGoBack =
+    typeof window !== "undefined" &&
+    typeof window.history.state?.idx === "number" &&
+    window.history.state.idx > 0;
+
+  const handleBack = () => {
+    if (canGoBack) {
+      navigate(-1);
+
+      return;
+    }
+
+    navigate("/profile", { replace: true });
+  };
+
   // 权限检查
   useEffect(() => {
     if (!isAdmin()) {
@@ -846,6 +861,16 @@ export default function ConfigPage() {
     <div className="p-6 max-w-4xl mx-auto">
       {/* 页面标题 */}
       <div className="flex items-center gap-3 mb-6">
+        <Button
+          isIconOnly
+          aria-label="返回上一页"
+          className="min-w-0 w-9 h-9"
+          size="sm"
+          variant="flat"
+          onPress={handleBack}
+        >
+          <BackIcon className="w-5 h-5" />
+        </Button>
         <SettingsIcon className="w-8 h-8 text-primary" />
         <div>
           <h1 className="text-2xl font-bold">网站配置</h1>

vite-frontend/src/pages/settings.tsx

@@ -9,6 +9,7 @@ import { Select, SelectItem } from "@/shadcn-bridge/heroui/select";
 import { Switch } from "@/shadcn-bridge/heroui/switch";
 import { reinitializeBaseURL } from "@/api/network";
 import { getConfigByName, updateConfig } from "@/api";
+import { BackIcon } from "@/components/icons";
 import {
   type UpdateReleaseChannel,
   getUpdateReleaseChannel,
@@ -168,20 +169,7 @@ export const SettingsPage = () => {
               variant="light"
               onPress={() => navigate(-1)}
             >
-              <svg
+              <BackIcon className="w-5 h-5" />
-                aria-hidden="true"
-                className="w-5 h-5"
-                fill="none"
-                stroke="currentColor"
-                viewBox="0 0 24 24"
-              >
-                <path
-                  d="M15 19l-7-7 7-7"
-                  strokeLinecap="round"
-                  strokeLinejoin="round"
-                  strokeWidth={2}
-                />
-              </svg>
             </Button>
             <h1 className="text-xl font-semibold text-gray-900 dark:text-white">
               面板设置

vite-frontend/src/shadcn-bridge/heroui/date-picker.tsx

@@ -38,15 +38,33 @@ function parseDateText(value: string) {
     return null;
   }
 
-  const matched = trimmed.match(/^(\d{4})[-/.](\d{1,2})[-/.](\d{1,2})$/);
+  const digitsOnly = trimmed.replace(/\D/g, "");
 
-  if (!matched) {
+  if (/^\d+$/.test(trimmed)) {
+    if (digitsOnly.length !== 8) {
+      return null;
+    }
+
+    const year = Number(digitsOnly.slice(0, 4));
+    const month = Number(digitsOnly.slice(4, 6));
+    const day = Number(digitsOnly.slice(6, 8));
+
+    if (!isValidCalendarDate(year, month, day)) {
+      return null;
+    }
+
+    return { day, month, year };
+  }
+
+  const numberParts = trimmed.match(/\d+/g);
+
+  if (!numberParts || numberParts.length !== 3 || numberParts[0].length !== 4) {
     return null;
   }
 
-  const year = Number(matched[1]);
+  const year = Number(numberParts[0]);
-  const month = Number(matched[2]);
+  const month = Number(numberParts[1]);
-  const day = Number(matched[3]);
+  const day = Number(numberParts[2]);
 
   if (!isValidCalendarDate(year, month, day)) {
     return null;