feat(skill-addresses): 地址检索升级为多关键词匹配

- 空格分隔多个关键词，全部命中（地址或技能名任一包含）才显示，便于在大量地址中收窄
- 搜索框加清除按钮 + 更清晰的占位提示
- 过滤时列表头显示「命中 / 总数」

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

frontend-web/src/pages/SkillAddressesPage.tsx

@@ -17,6 +17,7 @@ import {
   Search,
   Undo2,
   Wand2,
+  X,
 } from "lucide-react";
 import { toast } from "sonner";
 
@@ -231,11 +232,19 @@ export function SkillAddressesPanel() {
     }
   };
 
-  const q = query.trim().toLowerCase();
-  const visible = useMemo(
-    () => (!q ? groups : groups.filter((g) => g.address.toLowerCase().includes(q) || g.occurrences.some((o) => o.skill.toLowerCase().includes(q)))),
-    [groups, q],
+  // 多关键词检索：空格分隔，每个关键词都要命中（地址或技能名任一包含）才显示。
+  // 这样「uat 4.cn」能同时收窄到既含 uat 又含 4.cn 的地址，应对地址过多的场景。
+  const tokens = useMemo(
+    () => query.trim().toLowerCase().split(/\s+/).filter(Boolean),
+    [query],
   );
+  const visible = useMemo(() => {
+    if (tokens.length === 0) return groups;
+    return groups.filter((g) => {
+      const haystack = `${g.address} ${g.occurrences.map((o) => o.skill).join(" ")}`.toLowerCase();
+      return tokens.every((t) => haystack.includes(t));
+    });
+  }, [groups, tokens]);
 
   const totalOccurrences = useMemo(() => groups.reduce((s, g) => s + g.count, 0), [groups]);
   const canRollback = !!(lastBackupId || backups.length > 0);
@@ -332,15 +341,25 @@ export function SkillAddressesPanel() {
                 </button>
               ))}
             </div>
-            <div className="relative w-full md:w-80">
+            <div className="relative w-full md:w-96">
               <Search className="absolute left-3.5 top-1/2 size-4 -translate-y-1/2 text-slate-400" />
               <input
                 type="text"
-                placeholder="搜索地址 / 技能名…"
+                placeholder="按关键词检索地址 / 技能名（空格分隔多个，全部命中）"
                 value={query}
                 onChange={(e) => setQuery(e.target.value)}
-                className="w-full rounded-xl border border-slate-200 bg-slate-50/50 py-2 pl-10 pr-4 text-sm transition-all hover:border-slate-300 focus:border-blue-500 focus:outline-none focus:ring-4 focus:ring-blue-500/5"
+                className="w-full rounded-xl border border-slate-200 bg-slate-50/50 py-2 pl-10 pr-9 text-sm transition-all hover:border-slate-300 focus:border-blue-500 focus:outline-none focus:ring-4 focus:ring-blue-500/5"
               />
+              {query && (
+                <button
+                  type="button"
+                  onClick={() => setQuery("")}
+                  title="清除"
+                  className="absolute right-2.5 top-1/2 -translate-y-1/2 rounded p-0.5 text-slate-400 transition-colors hover:bg-slate-100 hover:text-slate-600"
+                >
+                  <X className="size-4" />
+                </button>
+              )}
             </div>
           </div>
 
@@ -422,7 +441,7 @@ export function SkillAddressesPanel() {
         {/* 地址列表 */}
         <div className="overflow-hidden rounded-2xl border border-slate-200/60 bg-white shadow-sm">
           <div className="flex items-center justify-between border-b border-slate-200/60 bg-slate-50/70 px-4 py-2.5 text-xs font-semibold text-slate-500">
-            <span>地址（{visible.length}）</span>
+            <span>地址（{visible.length}{tokens.length > 0 ? ` / ${groups.length}` : ""}）</span>
             {pendingCount > 0 && (
               <button
                 type="button"