feat(scheduling): batch filter as multi-select pills instead of dropdown

src/modules/scheduling/SuggestionDetail.tsx

@@ -28,7 +28,7 @@ function fmtRate(rate: number): string {
 export default function SuggestionDetail({ suggestion: s, onClose, onNotifySuccess }: Props) {
   const [previewCandidate, setPreviewCandidate] = useState<CandidateVehicle | null>(null);
   const [sentPlates, setSentPlates] = useState<Set<string>>(new Set());
-  const [batchFilter, setBatchFilter] = useState<string>('');
+  const [batchFilter, setBatchFilter] = useState<Set<string>>(new Set());
   const [sortKey, setSortKey] = useState<SortKey>('predicted');
   const [sortDir, setSortDir] = useState<SortDir>('desc');
 
@@ -45,7 +45,7 @@ export default function SuggestionDetail({ suggestion: s, onClose, onNotifySucce
   // Filtered + sorted candidates
   const displayCandidates = useMemo(() => {
     let list = s.candidates;
-    if (batchFilter) list = list.filter(c => c.targetName === batchFilter);
+    if (batchFilter.size > 0) list = list.filter(c => c.targetName != null && batchFilter.has(c.targetName));
     return [...list].sort((a, b) => {
       const va = sortKey === 'predicted' ? a.predictedAfterSwap : a.totalMileage;
       const vb = sortKey === 'predicted' ? b.predictedAfterSwap : b.totalMileage;
@@ -164,15 +164,35 @@ export default function SuggestionDetail({ suggestion: s, onClose, onNotifySucce
 
             {/* Filter + Sort controls */}
             <div className="flex items-center gap-2 mb-2.5 flex-wrap">
-              {/* Batch filter */}
-              <select
-                value={batchFilter}
-                onChange={e => setBatchFilter(e.target.value)}
-                className="text-[10px] px-2 py-1 rounded-lg border border-slate-200 bg-white text-slate-600 cursor-pointer outline-none"
+              {/* Batch multi-select pills */}
+              <div className="flex items-center gap-1.5 flex-wrap">
+                <button
+                  onClick={() => setBatchFilter(new Set())}
+                  className={`text-[10px] px-2 py-1 rounded-lg border cursor-pointer transition-colors ${
+                    batchFilter.size === 0 ? 'border-blue-300 bg-blue-50 text-blue-700 font-bold' : 'border-slate-200 text-slate-500'
+                  }`}
                 >
-                <option value="">全部</option>
-                {batchOptions.map(b => <option key={b} value={b}>{b}</option>)}
-              </select>
+                  全部
+                </button>
+                {batchOptions.map(b => {
+                  const active = batchFilter.has(b);
+                  return (
+                    <button
+                      key={b}
+                      onClick={() => setBatchFilter(prev => {
+                        const next = new Set(prev);
+                        if (active) next.delete(b); else next.add(b);
+                        return next;
+                      })}
+                      className={`text-[10px] px-2 py-1 rounded-lg border cursor-pointer transition-colors ${
+                        active ? 'border-blue-300 bg-blue-50 text-blue-700 font-bold' : 'border-slate-200 text-slate-500'
+                      }`}
+                    >
+                      {b}
+                    </button>
+                  );
+                })}
+              </div>
 
               {/* Sort buttons */}
               <button