feat(agents): add search box to skill picker dialog

Filters available skills by name + description (case-insensitive) as the
user types. Auto-focuses on open and clears the query on close. Shows a
distinct "no match" empty state vs. the existing "all assigned" one.

Closes #2266

Co-authored-by: multica-agent <github@multica.ai>

packages/views/agents/components/skill-add-dialog.tsx

@@ -1,7 +1,7 @@
 "use client";
 
 import { useState } from "react";
-import { FileText } from "lucide-react";
+import { FileText, Search } from "lucide-react";
 import { useQuery, useQueryClient } from "@tanstack/react-query";
 import { toast } from "sonner";
 import type { Agent } from "@multica/core/types";
@@ -20,6 +20,7 @@ import {
   DialogHeader,
   DialogTitle,
 } from "@multica/ui/components/ui/dialog";
+import { Input } from "@multica/ui/components/ui/input";
 import { useT } from "../../i18n";
 
 /**
@@ -46,11 +47,27 @@ export function SkillAddDialog({
   const qc = useQueryClient();
   const { data: workspaceSkills = [] } = useQuery(skillListOptions(wsId));
   const [saving, setSaving] = useState(false);
+  const [query, setQuery] = useState("");
 
   const agentSkillIds = new Set(agent.skills.map((s) => s.id));
   const availableSkills = workspaceSkills.filter(
     (s) => !agentSkillIds.has(s.id),
   );
+  const trimmedQuery = query.trim().toLowerCase();
+  const filteredSkills = trimmedQuery
+    ? availableSkills.filter((s) => {
+        const name = s.name.toLowerCase();
+        const description = s.description?.toLowerCase() ?? "";
+        return (
+          name.includes(trimmedQuery) || description.includes(trimmedQuery)
+        );
+      })
+    : availableSkills;
+
+  const handleOpenChange = (v: boolean) => {
+    if (!v) setQuery("");
+    onOpenChange(v);
+  };
 
   const handleAdd = async (skillId: string) => {
     setSaving(true);
@@ -58,7 +75,7 @@ export function SkillAddDialog({
       const newIds = [...agent.skills.map((s) => s.id), skillId];
       await api.setAgentSkills(agent.id, { skill_ids: newIds });
       qc.invalidateQueries({ queryKey: workspaceKeys.agents(wsId) });
-      onOpenChange(false);
+      handleOpenChange(false);
     } catch (e) {
       toast.error(e instanceof Error ? e.message : t(($) => $.tab_body.skills.add_failed_toast));
     } finally {
@@ -66,8 +83,11 @@ export function SkillAddDialog({
     }
   };
 
+  const showSearch = availableSkills.length > 0;
+  const noMatch = showSearch && filteredSkills.length === 0;
+
   return (
-    <Dialog open={open} onOpenChange={onOpenChange}>
+    <Dialog open={open} onOpenChange={handleOpenChange}>
       <DialogContent className="max-w-md">
         <DialogHeader>
           <DialogTitle className="text-sm">{t(($) => $.tab_body.skills.add_dialog_title)}</DialogTitle>
@@ -75,8 +95,21 @@ export function SkillAddDialog({
             {t(($) => $.tab_body.skills.add_dialog_description)}
           </DialogDescription>
         </DialogHeader>
+        {showSearch && (
+          <div className="relative">
+            <Search className="pointer-events-none absolute left-2.5 top-1/2 h-3.5 w-3.5 -translate-y-1/2 text-muted-foreground" />
+            <Input
+              autoFocus
+              value={query}
+              onChange={(e) => setQuery(e.target.value)}
+              placeholder={t(($) => $.tab_body.skills.add_dialog_search_placeholder)}
+              aria-label={t(($) => $.tab_body.skills.add_dialog_search_placeholder)}
+              className="pl-7"
+            />
+          </div>
+        )}
         <div className="max-h-64 space-y-1 overflow-y-auto">
-          {availableSkills.map((skill) => (
+          {filteredSkills.map((skill) => (
             <button
               key={skill.id}
               onClick={() => handleAdd(skill.id)}
@@ -99,9 +132,14 @@ export function SkillAddDialog({
               {t(($) => $.tab_body.skills.add_dialog_empty)}
             </p>
           )}
+          {noMatch && (
+            <p className="py-6 text-center text-xs text-muted-foreground">
+              {t(($) => $.tab_body.skills.add_dialog_no_match)}
+            </p>
+          )}
         </div>
         <DialogFooter>
-          <Button variant="ghost" onClick={() => onOpenChange(false)}>
+          <Button variant="ghost" onClick={() => handleOpenChange(false)}>
             {t(($) => $.tab_body.skills.add_dialog_cancel)}
           </Button>
         </DialogFooter>

packages/views/locales/en/agents.json

@@ -259,7 +259,9 @@
       "remove_failed_toast": "Failed to remove skill",
       "add_dialog_title": "Add skill",
       "add_dialog_description": "Select a workspace skill to assign to this agent.",
+      "add_dialog_search_placeholder": "Search skills",
       "add_dialog_empty": "All workspace skills are already assigned.",
+      "add_dialog_no_match": "No skills match your search.",
       "add_dialog_cancel": "Cancel",
       "add_failed_toast": "Failed to add skill"
     },

packages/views/locales/zh-Hans/agents.json

@@ -255,7 +255,9 @@
       "remove_failed_toast": "移除 skill 失败",
       "add_dialog_title": "添加 skill",
       "add_dialog_description": "选择一个工作区 skill 分配给该智能体。",
+      "add_dialog_search_placeholder": "搜索 skill",
       "add_dialog_empty": "全部工作区 skill 都已分配。",
+      "add_dialog_no_match": "没有匹配的 skill。",
       "add_dialog_cancel": "取消",
       "add_failed_toast": "添加 skill 失败"
     },