feat(skills/settings): 技能复制 + 设置持久化等会话前改动

- 技能复制:新增 POST 复制接口(_rewrite_skill_frontmatter_name 重写 frontmatter name + 校验 + 去重),前端 skills api/hooks 与技能设置页配套
- 设置持久化:lastAgentId、线程 RAG 模式锁(settings/index、local)
- i18n(en/zh/types)、agent-card/input-box/message-list 等页面文案与交互微调
- scheduler/element.py 小修

(本批为会话前已存在的工作区改动,按要求一并提交;构建产物 backend.zip 未提交)

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

frontend-web/src/components/workspace/agents/agent-card.tsx

@@ -2,6 +2,7 @@
 
 import {
   BotIcon,
+  CopyIcon,
   GlobeIcon,
   InfoIcon,
   LockIcon,
@@ -43,12 +44,14 @@ import { TagChipList } from "@/components/workspace/tags/tag-chip";
 import { TagPickerDialog } from "@/components/workspace/tags/tag-picker-dialog";
 import {
   useAgent,
+  useCreateAgent,
   useDeleteAgent,
   useSetAgentFeatured,
   useSetAgentPrivate,
   useToggleAgentFavorite,
   useUpdateAgent,
 } from "@/core/agents";
+import { getAgent } from "@/core/agents/api";
 import type { Agent } from "@/core/agents";
 import { getStoredAuth } from "@/core/auth";
 import { useI18n } from "@/core/i18n/hooks";
@@ -65,6 +68,7 @@ export function AgentCard({ agent }: AgentCardProps) {
   const router = useRouter();
   const deleteAgent = useDeleteAgent();
   const updateAgent = useUpdateAgent();
+  const createAgent = useCreateAgent();
   const setFeatured = useSetAgentFeatured();
   const setPrivate = useSetAgentPrivate();
   const toggleFavorite = useToggleAgentFavorite();
@@ -153,6 +157,41 @@ export function AgentCard({ agent }: AgentCardProps) {
     }
   }
 
+  async function handleDuplicate() {
+    if (createAgent.isPending) {
+      return;
+    }
+    try {
+      // SOUL.md is omitted from the list payload (perf), so fetch the detail
+      // row to carry the source agent's personality into the copy. Fall back
+      // to whatever the list happened to include if the detail fetch fails.
+      let soul = agent.soul ?? "";
+      try {
+        const detail = await getAgent(agent.id);
+        soul = detail.soul ?? soul;
+      } catch {
+        // keep the list fallback
+      }
+      const created = await createAgent.mutateAsync({
+        name: `${agent.name} 副本`,
+        description: agent.description ?? "",
+        soul,
+        skills: agent.skills ?? [],
+        model: agent.model ?? null,
+        tool_groups: agent.tool_groups ?? null,
+        // A copy starts as a private, unpublished draft the owner can refine
+        // before sharing — never inherit the source's published/private state.
+        published: false,
+        is_private: false,
+      });
+      toast.success(
+        `已复制为「${desensitize(created.name)}」，可在「我的」中编辑`,
+      );
+    } catch (err) {
+      toast.error(err instanceof Error ? err.message : String(err));
+    }
+  }
+
   async function handleSaveEdit() {
     const trimmedName = editName.trim();
     if (!trimmedName) {
@@ -471,6 +510,16 @@ export function AgentCard({ agent }: AgentCardProps) {
                   <ShieldIcon className="h-3.5 w-3.5" />
                 </Button>
               )}
+              <Button
+                size="icon"
+                variant="ghost"
+                className="h-8 w-8 shrink-0"
+                onClick={() => void handleDuplicate()}
+                disabled={createAgent.isPending}
+                title="复制为新智能体"
+              >
+                <CopyIcon className="h-3.5 w-3.5" />
+              </Button>
               {canEdit && (
                 <Button
                   size="icon"
@@ -535,7 +584,7 @@ export function AgentCard({ agent }: AgentCardProps) {
                   已选 {selectedSkills.length} 个
                 </span>
               </div>
-              <div className="rounded-md border p-2">
+              <div className="max-h-[240px] overflow-y-auto rounded-md border p-2">
                 {isSkillsLoading ? (
                   <p className="text-muted-foreground text-sm">技能加载中...</p>
                 ) : enabledSkills.length === 0 ? (
@@ -543,13 +592,13 @@ export function AgentCard({ agent }: AgentCardProps) {
                     当前没有可用技能
                   </p>
                 ) : (
-                  <div className="flex flex-wrap gap-2">
+                  <div className="grid grid-cols-1 gap-2 sm:grid-cols-2">
                     {enabledSkills.map((skill) => {
                       const checked = selectedSkills.includes(skill.name);
                       return (
                         <div
                           key={skill.name}
-                          className="inline-flex max-w-full items-center"
+                          className="flex w-full min-w-0 items-center"
                         >
                           <Button
                             type="button"
@@ -557,7 +606,7 @@ export function AgentCard({ agent }: AgentCardProps) {
                             variant={checked ? "default" : "outline"}
                             onClick={() => toggleSkill(skill.name)}
                             title={desensitize(skill.description ?? "")}
-                            className="h-8 max-w-[200px] rounded-r-none"
+                            className="h-8 min-w-0 flex-1 rounded-r-none"
                           >
                             <span className="truncate">{desensitize(skill.name)}</span>
                           </Button>

frontend-web/src/components/workspace/input-box.tsx

@@ -583,7 +583,7 @@ export function InputBox({
           // 对话态：常规白卡 + 中性边框 + 轻阴影
           isNewThread
             ? "rounded-3xl bg-transparent border-0 shadow-none ring-0"
-            : "rounded-3xl bg-background border border-border shadow-sm dark:bg-slate-800 dark:border-slate-700",
+            : "rounded-3xl bg-background border border-border shadow-sm transition-shadow hover:shadow-md focus-within:border-ring/40 focus-within:shadow-md focus-within:ring-1 focus-within:ring-ring/20 dark:bg-slate-800 dark:border-slate-700",
           className,
         )}
         disabled={disabled}

frontend-web/src/components/workspace/messages/message-list-item.tsx

@@ -1,9 +1,10 @@
 import type { Message } from "@langchain/langgraph-sdk";
-import { ClockIcon, FileIcon, Loader2Icon } from "lucide-react";
+import { ClockIcon, FileIcon, Loader2Icon, PencilIcon } from "lucide-react";
 import {
   memo,
   useCallback,
   useContext,
+  useEffect,
   useMemo,
   useState,
   type AnchorHTMLAttributes,
@@ -25,6 +26,8 @@ import {
 } from "@/components/ai-elements/reasoning";
 import { Task, TaskTrigger } from "@/components/ai-elements/task";
 import { Badge } from "@/components/ui/badge";
+import { Button } from "@/components/ui/button";
+import { Textarea } from "@/components/ui/textarea";
 import {
   UploadedFilePreviewDialog,
   useAuthedObjectUrl,
@@ -51,6 +54,7 @@ import { cn } from "@/lib/utils";
 
 import { CitationLink } from "../citations/citation-link";
 import { CopyButton } from "../copy-button";
+import { Tooltip } from "../tooltip";
 import { SkillDisplayBlock } from "../skill-display-block";
 import { ThreadContext } from "./context";
 import { DownloadWordButton } from "./download-word-button";
@@ -88,6 +92,7 @@ export function MessageListItem({
   tokenUsageEnabled = false,
   displaySources = [],
   extraRehypePlugins,
+  onEditResubmit,
 }: {
   className?: string;
   message: Message;
@@ -96,6 +101,7 @@ export function MessageListItem({
   tokenUsageEnabled?: boolean;
   displaySources?: RuntimeDisplaySource[];
   extraRehypePlugins?: ReturnType<typeof useRehypeSplitWordsIntoSpans>;
+  onEditResubmit?: (text: string) => void;
 }) {
   const isHuman = message.type === "human";
   const messageMarkdown =
@@ -115,17 +121,23 @@ export function MessageListItem({
         tokenUsageEnabled={tokenUsageEnabled}
         displaySources={displaySources}
         extraRehypePlugins={extraRehypePlugins}
+        onEditResubmit={onEditResubmit}
       />
-      {!isLoading && (
+      {/*
+        Human messages carry their own inline copy/edit toolbar inside
+        MessageContent (above the timestamp). Only assistant answers use the
+        floating bottom toolbar here.
+      */}
+      {!isLoading && !isHuman && (
         <MessageToolbar
           className={cn(
-            isHuman ? "-bottom-9 justify-end" : "-bottom-8",
+            "-bottom-8",
             "absolute right-0 left-0 z-20 opacity-0 transition-opacity delay-200 duration-300 group-hover/conversation-message:opacity-100",
           )}
         >
           <div className="flex gap-1">
             <CopyButton clipboardData={messageMarkdown} />
-            {!isHuman && messageMarkdown && (
+            {messageMarkdown && (
               <DownloadWordButton
                 markdown={messageMarkdown}
                 fileName="message"
@@ -138,6 +150,125 @@ export function MessageListItem({
   );
 }
 
+/**
+ * Inline copy/edit affordances + editor for the user's own question bubble.
+ *
+ * Layout: bubble → hover toolbar (copy + edit) → timestamp. The toolbar sits
+ * in normal flow above the timestamp (not floating) so it never covers the
+ * following message. Clicking edit turns the bubble into a textarea seeded with
+ * the question; confirming sends the edited text as a brand-new turn (the
+ * original question stays in the thread).
+ */
+function HumanMessageBlock({
+  text,
+  filesList,
+  messageTime,
+  components,
+  onEditResubmit,
+}: {
+  text: string;
+  filesList: React.ReactNode;
+  messageTime: { label: string; full: string } | null;
+  components: MarkdownContentProps["components"];
+  onEditResubmit?: (text: string) => void;
+}) {
+  const { t } = useI18n();
+  const [editing, setEditing] = useState(false);
+  const [draft, setDraft] = useState(text);
+
+  useEffect(() => {
+    if (!editing) {
+      setDraft(text);
+    }
+  }, [text, editing]);
+
+  const confirmEdit = useCallback(() => {
+    const value = draft.trim();
+    if (!value) {
+      return;
+    }
+    onEditResubmit?.(value);
+    setEditing(false);
+  }, [draft, onEditResubmit]);
+
+  if (editing) {
+    return (
+      <div className="ml-auto flex w-full max-w-[min(85%,42rem)] flex-col gap-2">
+        {filesList}
+        <Textarea
+          value={draft}
+          autoFocus
+          onChange={(event) => setDraft(event.currentTarget.value)}
+          onKeyDown={(event) => {
+            if (event.key === "Enter" && (event.metaKey || event.ctrlKey)) {
+              event.preventDefault();
+              confirmEdit();
+            }
+            if (event.key === "Escape") {
+              event.preventDefault();
+              setEditing(false);
+            }
+          }}
+          className="min-h-20 resize-none text-[15px] leading-7"
+        />
+        <div className="flex items-center justify-end gap-2">
+          <Button
+            size="sm"
+            variant="ghost"
+            onClick={() => setEditing(false)}
+          >
+            {t.common.cancel}
+          </Button>
+          <Button size="sm" onClick={confirmEdit} disabled={!draft.trim()}>
+            {t.common.confirm}
+          </Button>
+        </div>
+      </div>
+    );
+  }
+
+  const messageResponse = text ? (
+    <AIElementMessageResponse
+      remarkPlugins={humanMessagePlugins.remarkPlugins}
+      rehypePlugins={humanMessagePlugins.rehypePlugins}
+      components={components}
+      parseIncompleteMarkdown={false}
+    >
+      {text}
+    </AIElementMessageResponse>
+  ) : null;
+
+  return (
+    <div className="ml-auto flex flex-col items-end gap-1">
+      {filesList}
+      {messageResponse && (
+        <AIElementMessageContent className="w-fit">
+          {messageResponse}
+        </AIElementMessageContent>
+      )}
+      <MessageTimeStamp time={messageTime} align="right" />
+      {text && (
+        <div className="flex items-center gap-0.5 opacity-0 transition-opacity duration-200 group-hover/conversation-message:opacity-100">
+          <CopyButton clipboardData={text} className="size-6" />
+          {onEditResubmit && (
+            <Tooltip content={t.inputBox.editQuestion}>
+              <Button
+                size="icon-sm"
+                type="button"
+                variant="ghost"
+                className="size-6"
+                onClick={() => setEditing(true)}
+              >
+                <PencilIcon size={11} />
+              </Button>
+            </Tooltip>
+          )}
+        </div>
+      )}
+    </div>
+  );
+}
+
 /**
  * Custom image component that handles artifact URLs
  */
@@ -177,6 +308,7 @@ function MessageContent_({
   tokenUsageEnabled = false,
   displaySources = [],
   extraRehypePlugins,
+  onEditResubmit,
 }: {
   className?: string;
   message: Message;
@@ -185,6 +317,7 @@ function MessageContent_({
   tokenUsageEnabled?: boolean;
   displaySources?: RuntimeDisplaySource[];
   extraRehypePlugins?: ReturnType<typeof useRehypeSplitWordsIntoSpans>;
+  onEditResubmit?: (text: string) => void;
 }) {
   const baseRehypePlugins = useRehypeSplitWordsIntoSpans(isLoading);
   const rehypePlugins = useMemo(
@@ -289,26 +422,16 @@ function MessageContent_({
   }
 
   if (isHuman) {
-    const messageResponse = contentToDisplay ? (
-      <AIElementMessageResponse
-        remarkPlugins={humanMessagePlugins.remarkPlugins}
-        rehypePlugins={humanMessagePlugins.rehypePlugins}
-        components={components}
-        parseIncompleteMarkdown={false}
-      >
-        {contentToDisplay}
-      </AIElementMessageResponse>
-    ) : null;
+    // Render HumanMessageBlock directly (no width-constraining wrapper) so the
+    // inline editor can widen beyond the bubble's fit-content width.
     return (
-      <div className={cn("ml-auto flex flex-col gap-2", className)}>
-        {filesList}
-        {messageResponse && (
-          <AIElementMessageContent className="w-fit">
-            {messageResponse}
-          </AIElementMessageContent>
-        )}
-        <MessageTimeStamp time={messageTime} align="right" />
-      </div>
+      <HumanMessageBlock
+        text={contentToDisplay}
+        filesList={filesList}
+        messageTime={messageTime}
+        components={components}
+        onEditResubmit={onEditResubmit}
+      />
     );
   }
 

frontend-web/src/components/workspace/messages/message-list.tsx

@@ -58,6 +58,7 @@ export function MessageList({
   tokenUsageEnabled = false,
   extraRehypePlugins,
   onClarificationSubmit,
+  onEditResubmit,
   onSetupAgentApprove,
   onSetupAgentReject,
 }: {
@@ -68,6 +69,7 @@ export function MessageList({
   tokenUsageEnabled?: boolean;
   extraRehypePlugins?: ReturnType<typeof useRehypeSplitWordsIntoSpans>;
   onClarificationSubmit?: (answer: string) => void | Promise<void>;
+  onEditResubmit?: (text: string) => void;
   onSetupAgentApprove?: (payload: SetupAgentApprovalPayload) => void | Promise<void>;
   onSetupAgentReject?: (payload: SetupAgentApprovalPayload) => void | Promise<void>;
 }) {
@@ -241,6 +243,7 @@ export function MessageList({
                   tokenUsageEnabled={tokenUsageEnabled}
                   displaySources={displaySources}
                   extraRehypePlugins={extraRehypePlugins}
+                  onEditResubmit={onEditResubmit}
                 />
               );
             });

frontend-web/src/components/workspace/settings/skill-settings-page.tsx

@@ -7,6 +7,7 @@ import {
   ChevronLeftIcon,
   ChevronRightIcon,
   ClockIcon,
+  CopyIcon,
   FileArchive,
   GlobeIcon,
   InfoIcon,
@@ -50,6 +51,7 @@ import {
   ItemContent,
   ItemDescription,
 } from "@/components/ui/item";
+import { Input } from "@/components/ui/input";
 import { Tabs, TabsList, TabsTrigger } from "@/components/ui/tabs";
 import { SkillDetailDialog } from "@/components/workspace/skills/skill-detail-dialog";
 import { TagChipList } from "@/components/workspace/tags/tag-chip";
@@ -61,6 +63,7 @@ import { useI18n } from "@/core/i18n/hooks";
 import type { ValidateSkillUploadResponse } from "@/core/skills/api";
 import {
   useDeleteCustomSkill,
+  useDuplicateSkill,
   useInstallSkillUpload,
   useReconcileCustomSkills,
   useSetSkillPinned,
@@ -390,9 +393,12 @@ export function SkillRow({
   const setPublished = useSetSkillPublished();
   const setPinned = useSetSkillPinned();
   const deleteSkill = useDeleteCustomSkill();
+  const duplicateSkillMutation = useDuplicateSkill();
   const [confirmDeleteOpen, setConfirmDeleteOpen] = useState(false);
   const [tagPickerOpen, setTagPickerOpen] = useState(false);
   const [detailOpen, setDetailOpen] = useState(false);
+  const [duplicateOpen, setDuplicateOpen] = useState(false);
+  const [duplicateName, setDuplicateName] = useState("");
 
   const isCustom = skill.category === "custom";
   // Built-in flag falls back to "no DB owner" so legacy responses without
@@ -428,6 +434,31 @@ export function SkillRow({
     }
   }
 
+  function handleOpenDuplicate() {
+    // Suggest a "<name>-copy" default that already satisfies the backend's
+    // lowercase/digit/-/_ skill-name rule. The user can edit it before saving.
+    setDuplicateName(`${skill.name}-copy`);
+    setDuplicateOpen(true);
+  }
+
+  async function handleDuplicate() {
+    const target = duplicateName.trim();
+    if (!target) {
+      toast.error("请输入新技能名称");
+      return;
+    }
+    try {
+      const result = await duplicateSkillMutation.mutateAsync({
+        sourceName: skill.name,
+        newName: target,
+      });
+      toast.success(`已复制为「${result.skill_name}」`);
+      setDuplicateOpen(false);
+    } catch (err) {
+      toast.error(err instanceof Error ? err.message : String(err));
+    }
+  }
+
   async function handleTogglePinned() {
     const next = !skill.pinned;
     try {
@@ -587,6 +618,16 @@ export function SkillRow({
               )}
             </Button>
           )}
+          <Button
+            size="icon"
+            variant="ghost"
+            className="h-8 w-8 shrink-0"
+            disabled={duplicateSkillMutation.isPending}
+            onClick={handleOpenDuplicate}
+            title="复制为新技能"
+          >
+            <CopyIcon className="size-3.5" />
+          </Button>
           {canManage && (
             <Button
               size="icon"
@@ -600,6 +641,43 @@ export function SkillRow({
           )}
         </ItemActions>
       </Item>
+      <Dialog open={duplicateOpen} onOpenChange={setDuplicateOpen}>
+        <DialogContent>
+          <DialogHeader>
+            <DialogTitle>复制技能</DialogTitle>
+            <DialogDescription>
+              将「{desensitize(skill.name)}」复制为一个属于你的新技能。请输入新名称（仅小写字母、数字、- 或 _）。
+            </DialogDescription>
+          </DialogHeader>
+          <Input
+            value={duplicateName}
+            onChange={(e) => setDuplicateName(e.currentTarget.value)}
+            placeholder="new-skill-name"
+            autoFocus
+            onKeyDown={(e) => {
+              if (e.key === "Enter") {
+                e.preventDefault();
+                void handleDuplicate();
+              }
+            }}
+          />
+          <DialogFooter>
+            <Button
+              variant="outline"
+              onClick={() => setDuplicateOpen(false)}
+              disabled={duplicateSkillMutation.isPending}
+            >
+              {t.common.cancel}
+            </Button>
+            <Button
+              onClick={() => void handleDuplicate()}
+              disabled={duplicateSkillMutation.isPending}
+            >
+              {duplicateSkillMutation.isPending ? t.common.loading : "复制"}
+            </Button>
+          </DialogFooter>
+        </DialogContent>
+      </Dialog>
       <Dialog open={confirmDeleteOpen} onOpenChange={setConfirmDeleteOpen}>
         <DialogContent>
           <DialogHeader>