feat(navigation): add multi-region picker

station-navigation/index.html

@@ -40,7 +40,8 @@
         <div class="map-top-bar"><div class="status-glass-pill"><span class="pulse-ring"></span><span id="mapStatusText">正在同步加氢站数据…</span></div></div>
         <div class="map-explore-toolbar" aria-label="地图搜索与定位">
           <button class="locate-btn" id="locateDeviceBtn" type="button" onclick="locateMe()" aria-label="定位附近站点"><svg viewBox="0 0 24 24"><circle cx="12" cy="12" r="3"></circle><path d="M12 2v3M12 19v3M2 12h3M19 12h3"></path><circle cx="12" cy="12" r="8"></circle></svg><span id="locateDeviceLabel">定位</span></button>
-          <div class="explore-search-shell"><label class="entity-search-field" for="stationSearch"><svg viewBox="0 0 24 24"><circle cx="11" cy="11" r="7"></circle><path d="m20 20-3.6-3.6"></path></svg><input id="stationSearch" type="search" autocomplete="off" placeholder="搜索位置、站点或地址" aria-label="搜索位置、站点或地址" oninput="handleStationSearchInput(this.value)" onfocus="openStationSearchSuggestions()" onkeydown="handleSearchKeydown(event)"><button class="search-clear-btn" id="clearSearch" type="button" onclick="clearSearch()" aria-label="清除搜索" hidden>×</button></label><div class="explore-suggestions" id="stationSearchSuggestions" role="listbox" aria-label="搜索建议" hidden></div></div>
+          <button class="region-picker-trigger" id="regionPickerTrigger" type="button" onclick="openRegionPicker()" aria-haspopup="dialog"><span class="region-picker-trigger-icon">⌖</span><span>运营区域</span><b id="regionPickerTriggerCount" hidden>0</b></button>
+          <div class="explore-search-shell"><label class="entity-search-field" for="stationSearch"><svg viewBox="0 0 24 24"><circle cx="11" cy="11" r="7"></circle><path d="m20 20-3.6-3.6"></path></svg><input id="stationSearch" type="search" autocomplete="off" placeholder="搜索站点或详细地址" aria-label="搜索站点或详细地址" oninput="handleStationSearchInput(this.value)" onfocus="openStationSearchSuggestions()" onkeydown="handleSearchKeydown(event)"><button class="search-clear-btn" id="clearSearch" type="button" onclick="clearSearch()" aria-label="清除搜索" hidden>×</button></label><div class="explore-suggestions" id="stationSearchSuggestions" role="listbox" aria-label="站点搜索建议" hidden></div></div>
           <div class="selected-location-filter-rail" id="selectedLocationFilters" aria-label="已选位置" hidden></div>
           <div class="filter-chip-rail" id="filterChipRail" role="group" aria-label="站点类型筛选"><button class="map-filter-chip is-active" type="button" data-station-filter="all" onclick="setStationFilter('all')">全部站点</button><button class="map-filter-chip" type="button" data-station-filter="partner" onclick="setStationFilter('partner')">合作站</button></div>
           <span class="filter-result-meta" id="resultMeta" aria-live="polite">全部 0</span>
@@ -61,6 +62,16 @@
       </aside>
     </main>
   </div>
+  <div class="region-picker-backdrop" id="regionPickerModal" role="dialog" aria-modal="true" aria-labelledby="regionPickerTitle" hidden>
+    <section class="region-picker-dialog">
+      <header class="region-picker-header"><div><span class="region-picker-eyebrow">加氢站导航</span><h2 id="regionPickerTitle">运营区域选择 <em>多选</em></h2></div><button type="button" class="region-picker-close" onclick="closeRegionPicker()" aria-label="关闭">×</button></header>
+      <div class="region-picker-selected" id="regionPickerSelected"></div>
+      <label class="region-picker-search" for="regionPickerSearch"><span>⌕</span><input id="regionPickerSearch" type="search" autocomplete="off" placeholder="搜索省 / 市 / 区县" aria-label="搜索省、市或区县" oninput="setRegionPickerSearch(this.value)"><button type="button" id="regionPickerSearchClear" onclick="setRegionPickerSearch('')" aria-label="清除搜索" hidden>×</button></label>
+      <nav class="region-picker-path" id="regionPickerPath" aria-label="行政区域路径"></nav>
+      <div class="region-picker-list" id="regionPickerList" aria-live="polite"></div>
+      <footer class="region-picker-footer"><span id="regionPickerSummary">已选 0 项</span><div><button type="button" class="region-picker-text-button" onclick="clearRegionPickerDraft()">清空</button><button type="button" class="region-picker-confirm" onclick="confirmRegionPicker()">确认</button></div></footer>
+    </section>
+  </div>
   <script src="https://cdn.jsdelivr.net/npm/pinyin-pro@3.28.2/dist/index.js" crossorigin="anonymous"></script>
   <script src="app.js?v=__ASSET_VERSION__"></script>
 </body>