Merge branch 'dhk-1' of http://192.168.0.200/knowledge-base-bj/deerflow-server into dhk-1

frontend-web/src/components/workspace/chats/chat-box.tsx

@@ -16,6 +16,7 @@ import { apiFetch } from "@/core/api";
 import { getBackendBaseURL } from "@/core/config";
 import { isThreadRagModeLocked, useLocalSettings } from "@/core/settings";
 import { useSkills } from "@/core/skills/hooks";
+import { normalizeDisplaySources } from "@/core/skill-display/display-adapter";
 import {
   buildSkillDisplayMap,
   collectRuntimeDisplaySources,
@@ -147,16 +148,30 @@ const ChatBox: React.FC<{ children: React.ReactNode; threadId: string }> = ({
       });
     return () => controller.abort();
   }, [ragModeEnabled, thread.isLoading, threadId, thread.values.messages]);
-  const referenceBatches =
-    backendReferenceBatches.length > 0
-      ? backendReferenceBatches
-      : fallbackReferenceBatches;
+  const adaptedBackendReferenceBatches = useMemo(
+    () =>
+      adaptBackendReferenceBatches(
+        backendReferenceBatches,
+        fallbackReferenceBatches,
+        skillDisplayMap,
+      ),
+    [backendReferenceBatches, fallbackReferenceBatches, skillDisplayMap],
+  );
+  const referenceBatches = useMemo(
+    () =>
+      mergeReferenceBatches(
+        adaptedBackendReferenceBatches,
+        fallbackReferenceBatches,
+      ),
+    [adaptedBackendReferenceBatches, fallbackReferenceBatches],
+  );
   useEffect(() => {
     if (!ragModeEnabled) {
       return;
     }
     const signature = JSON.stringify({
       backend: backendReferenceBatches.map((batch) => batch.sources?.length ?? 0),
+      adaptedBackend: adaptedBackendReferenceBatches.map((batch) => batch.sources?.length ?? 0),
       fallback: fallbackReferenceBatches.map((batch) => batch.sources?.length ?? 0),
       final: referenceBatches.map((batch) => batch.sources?.length ?? 0),
     });
@@ -168,12 +183,13 @@ const ChatBox: React.FC<{ children: React.ReactNode; threadId: string }> = ({
       using: backendReferenceBatches.length > 0 ? "后端接口" : "前端兜底",
       backendBatchCount: backendReferenceBatches.length,
       backendSourceCounts: backendReferenceBatches.map((batch) => batch.sources?.length ?? 0),
+      adaptedBackendSourceCounts: adaptedBackendReferenceBatches.map((batch) => batch.sources?.length ?? 0),
       fallbackBatchCount: fallbackReferenceBatches.length,
       fallbackSourceCounts: fallbackReferenceBatches.map((batch) => batch.sources?.length ?? 0),
       finalBatchCount: referenceBatches.length,
       finalSourceCounts: referenceBatches.map((batch) => batch.sources?.length ?? 0),
     });
-  }, [backendReferenceBatches, fallbackReferenceBatches, ragModeEnabled, referenceBatches, threadId]);
+  }, [adaptedBackendReferenceBatches, backendReferenceBatches, fallbackReferenceBatches, ragModeEnabled, referenceBatches, threadId]);
   const latestReferenceBatch =
     referenceBatches.length > 0
       ? referenceBatches[referenceBatches.length - 1]!
@@ -487,6 +503,191 @@ function ReferencePanel({
   );
 }
 
+function adaptBackendReferenceBatches(
+  backendBatches: BackendReferenceBatch[],
+  configuredBatches: BackendReferenceBatch[],
+  skillDisplayMap: ReturnType<typeof buildSkillDisplayMap>,
+): BackendReferenceBatch[] {
+  if (backendBatches.length === 0) {
+    return backendBatches;
+  }
+  return backendBatches.map((backendBatch, batchIndex) => {
+    const configuredBatch =
+      configuredBatches.find(
+        (batch) =>
+          batch.id === backendBatch.id ||
+          batch.assistant_message_id === backendBatch.assistant_message_id,
+      ) ?? configuredBatches[batchIndex];
+    const configuredSources = configuredBatch?.sources ?? [];
+    const configuredByIndex = new Map(
+      configuredSources.map((source) => [source.index, source]),
+    );
+    const configuredByKey = new Map(
+      configuredSources.map((source) => [referenceSourceKey(source), source]),
+    );
+    return {
+      ...backendBatch,
+      sources: backendBatch.sources.map((backendSource, sourceIndex) => {
+        const configuredSource =
+          configuredByIndex.get(backendSource.index) ??
+          configuredByKey.get(referenceSourceKey(backendSource)) ??
+          configuredSources[sourceIndex] ??
+          adaptBackendSourceWithSkillDisplay(backendSource, skillDisplayMap);
+        if (!configuredSource) {
+          return backendSource;
+        }
+        return {
+          ...backendSource,
+          ...configuredSource,
+          index: backendSource.index,
+          mode:
+            backendSource.mode !== "citation"
+              ? backendSource.mode
+              : configuredSource.mode || backendSource.mode,
+          raw: backendSource.raw ?? configuredSource.raw,
+        };
+      }),
+    };
+  });
+}
+
+function mergeReferenceBatches(
+  backendBatches: BackendReferenceBatch[],
+  fallbackBatches: BackendReferenceBatch[],
+): BackendReferenceBatch[] {
+  if (backendBatches.length === 0) {
+    return fallbackBatches;
+  }
+  if (fallbackBatches.length === 0) {
+    return backendBatches;
+  }
+  const merged = [...backendBatches];
+  const knownIds = new Set(
+    backendBatches.flatMap((batch) =>
+      [batch.id, batch.assistant_message_id].filter(Boolean),
+    ),
+  );
+  for (const fallbackBatch of fallbackBatches) {
+    if (
+      knownIds.has(fallbackBatch.id) ||
+      (fallbackBatch.assistant_message_id &&
+        knownIds.has(fallbackBatch.assistant_message_id))
+    ) {
+      continue;
+    }
+    merged.push(fallbackBatch);
+  }
+  return merged;
+}
+
+function adaptBackendSourceWithSkillDisplay(
+  source: BackendReferenceSource,
+  skillDisplayMap: ReturnType<typeof buildSkillDisplayMap>,
+): BackendReferenceSource | null {
+  const raw = source.raw;
+  if (!raw || typeof raw !== "object" || Array.isArray(raw)) {
+    return null;
+  }
+  const rawItem = raw as Record<string, unknown>;
+  const match = findBackendSourceDisplay(source, skillDisplayMap);
+  if (!match) {
+    return null;
+  }
+  const normalized = normalizeDisplaySources(
+    buildPayloadAtPath(match.display.resultPath || "results", [rawItem]),
+    match.display,
+  )[0];
+  if (!normalized) {
+    return null;
+  }
+  return {
+    ...source,
+    ...normalized,
+    skillName: match.skillName,
+    mode: match.display.mode,
+    tableColumns: match.display.tableColumns,
+    index: source.index,
+    raw: source.raw,
+  };
+}
+
+function findBackendSourceDisplay(
+  source: BackendReferenceSource,
+  skillDisplayMap: ReturnType<typeof buildSkillDisplayMap>,
+) {
+  const direct = skillDisplayMap.get(source.skillName);
+  if (direct) {
+    return { skillName: source.skillName, display: direct };
+  }
+  const normalizedSource = normalizeSkillName(source.skillName);
+  for (const [skillName, display] of skillDisplayMap) {
+    const normalizedSkill = normalizeSkillName(skillName);
+    if (
+      normalizedSource === normalizedSkill ||
+      normalizedSource.endsWith(normalizedSkill) ||
+      normalizedSource.includes(normalizedSkill)
+    ) {
+      return { skillName, display };
+    }
+  }
+  return null;
+}
+
+function normalizeSkillName(value: string): string {
+  return value.toLowerCase().replace(/[^a-z0-9]+/g, "");
+}
+
+function buildPayloadAtPath(path: string, items: Record<string, unknown>[]) {
+  const parts = path.split(".").map((part) => part.trim()).filter(Boolean);
+  if (parts.length === 0) {
+    return items;
+  }
+  const root: Record<string, unknown> = {};
+  let cursor = root;
+  for (let index = 0; index < parts.length; index++) {
+    const part = parts[index]!;
+    if (index === parts.length - 1) {
+      cursor[part] = items;
+    } else {
+      const next: Record<string, unknown> = {};
+      cursor[part] = next;
+      cursor = next;
+    }
+  }
+  return root;
+}
+
+function referenceSourceKey(source: BackendReferenceSource): string {
+  const raw = source.raw ?? {};
+  const rawRecord =
+    raw && typeof raw === "object" && !Array.isArray(raw)
+      ? (raw as Record<string, unknown>)
+      : {};
+  const id =
+    source.id ||
+    source.url ||
+    stringifyKeyValue(rawRecord.recUuid) ||
+    stringifyKeyValue(rawRecord.uuid) ||
+    stringifyKeyValue(rawRecord.docId) ||
+    stringifyKeyValue(rawRecord.id);
+  if (id) {
+    return id.trim().toLowerCase();
+  }
+  return [source.title, source.source, source.time, source.content, source.snippet]
+    .filter(Boolean)
+    .join("|")
+    .trim()
+    .toLowerCase();
+}
+
+function stringifyKeyValue(value: unknown): string | undefined {
+  if (typeof value === "string" || typeof value === "number") {
+    const text = String(value).trim();
+    return text || undefined;
+  }
+  return undefined;
+}
+
 function findPreviousHumanMessageId(
   messages: Message[],
   beforeMessageId?: string,
@@ -530,8 +731,7 @@ function buildTurnReferenceBatches(
       beforeMessageId:
         nextHumanIndex === -1 ? undefined : messages[nextHumanIndex]?.id,
       includeBeforeMessage: false,
-      includeModes: ["citation"],
-    }).filter((source) => source.mode === "citation");
+    }).filter((source) => source.mode !== "none");
     if (sources.length > 0) {
       batches.push({
         id: assistant.id,
@@ -562,8 +762,7 @@ function findLastAssistantAnswer(
     if (
       message?.type === "ai" &&
       message.id &&
-      hasAssistantAnswerContent(message) &&
-      !hasAssistantToolCalls(message)
+      hasAssistantAnswerContent(message)
     ) {
       return message;
     }
@@ -588,18 +787,4 @@ function hasAssistantAnswerContent(message: Message): boolean {
   });
 }
 
-function hasAssistantToolCalls(message: Message): boolean {
-  const direct = (message as { tool_calls?: unknown }).tool_calls;
-  if (Array.isArray(direct) && direct.length > 0) {
-    return true;
-  }
-  const chunks = (message as { tool_call_chunks?: unknown }).tool_call_chunks;
-  if (Array.isArray(chunks) && chunks.length > 0) {
-    return true;
-  }
-  const kwargs = (message as { additional_kwargs?: Record<string, unknown> }).additional_kwargs;
-  const extra = kwargs?.tool_calls;
-  return Array.isArray(extra) && extra.length > 0;
-}
-
 export { ChatBox };

frontend-web/src/components/workspace/skill-display-sources.tsx

@@ -71,6 +71,7 @@ export function SourceCard({
     score ? `相关度 ${score}` : null,
   ].filter(Boolean);
   const isCitation = source.mode === "citation";
+  const showReferenceNumber = referenceTarget || isCitation;
 
   return (
     <>
@@ -79,14 +80,14 @@ export function SourceCard({
         type="button"
         className={cn(
           "group bg-card/60 hover:bg-card hover:border-primary/40 focus-visible:ring-primary/30 w-full scroll-mt-12 rounded-xl border px-3.5 py-3 text-left shadow-sm transition-all focus-visible:ring-2 focus-visible:outline-none",
-          "target:bg-primary/5 target:border-primary/60",
+          "target:border-amber-300 target:bg-amber-50/80",
           highlighted &&
-            "animate-[reference-flash_1.4s_ease-out] border-amber-400 bg-amber-50 shadow-[0_0_0_3px_rgba(251,191,36,0.22)]",
+            "border-amber-300 bg-amber-50/80 shadow-[0_0_0_2px_rgba(251,191,36,0.14)]",
         )}
         onClick={() => setOpen(true)}
       >
         <div className="flex items-start gap-3">
-          {isCitation && (
+          {showReferenceNumber && (
             <span className="bg-primary/10 text-primary border-primary/20 group-hover:bg-primary/15 mt-0.5 inline-flex size-6 shrink-0 items-center justify-center rounded-full border text-xs font-semibold tabular-nums">
               {source.index}
             </span>
@@ -122,7 +123,7 @@ export function SourceCard({
             <div className="flex items-start justify-between gap-3 pr-8">
               <div className="min-w-0 flex-1">
                 <div className="flex items-start gap-2">
-                  {isCitation && (
+                  {showReferenceNumber && (
                     <span className="bg-primary/10 text-primary border-primary/20 mt-1 inline-flex size-6 shrink-0 items-center justify-center rounded-full border text-xs font-semibold tabular-nums">
                       {source.index}
                     </span>

frontend-web/src/components/workspace/skills/skill-file-preview-dialog.tsx

@@ -0,0 +1,284 @@
+"use client";
+
+import {
+  CopyIcon,
+  DownloadIcon,
+  Loader2,
+  PencilIcon,
+  XIcon,
+} from "lucide-react";
+import { useEffect, useMemo, useState } from "react";
+import { toast } from "sonner";
+
+import { Button } from "@/components/ui/button";
+import {
+  Dialog,
+  DialogContent,
+  DialogDescription,
+  DialogHeader,
+  DialogTitle,
+} from "@/components/ui/dialog";
+import { Textarea } from "@/components/ui/textarea";
+import { MarkdownContent } from "@/components/workspace/messages/markdown-content";
+import { getSkillFileDownloadURL } from "@/core/skills/api";
+import {
+  useSaveSkillFile,
+  useSkillFileContent,
+} from "@/core/skills/hooks";
+import { useI18n } from "@/core/i18n/hooks";
+import { reasoningPlugins } from "@/core/streamdown";
+
+const markdownClassName =
+  "!h-auto !w-full max-w-none min-w-0 text-sm leading-7 " +
+  "[&_h1]:mt-0 [&_h1]:mb-3 [&_h1]:text-xl [&_h1]:font-semibold " +
+  "[&_h2]:mt-6 [&_h2]:mb-2 [&_h2]:border-b [&_h2]:pb-2 [&_h2]:text-lg [&_h2]:font-semibold " +
+  "[&_h3]:mt-5 [&_h3]:mb-2 [&_h3]:text-base [&_h3]:font-semibold " +
+  "[&_p]:my-3 [&_ul]:my-3 [&_ol]:my-3 [&_li]:my-1.5 " +
+  "[&_ul]:list-disc [&_ol]:list-decimal [&_ul]:pl-5 [&_ol]:pl-5 " +
+  "[&_blockquote]:my-4 [&_blockquote]:border-l-4 [&_blockquote]:pl-4 [&_blockquote]:text-muted-foreground " +
+  "[&_code]:rounded [&_code]:border [&_code]:bg-muted [&_code]:px-1.5 [&_code]:py-0.5 [&_code]:font-mono [&_code]:text-xs " +
+  "[&_pre]:my-4 [&_pre]:max-w-full [&_pre]:overflow-x-auto [&_pre]:rounded-lg [&_pre]:border [&_pre]:bg-muted [&_pre]:p-4 " +
+  "[&_pre_code]:border-0 [&_pre_code]:bg-transparent [&_pre_code]:p-0";
+
+function isImageMime(mime: string): boolean {
+  return mime.startsWith("image/");
+}
+
+export function SkillFilePreviewDialog({
+  skillName,
+  path,
+  treeEditable,
+  open,
+  onOpenChange,
+}: {
+  skillName: string | null;
+  path: string | null;
+  /** From the tree response: whether *any* file in this skill is editable for the caller. */
+  treeEditable: boolean;
+  open: boolean;
+  onOpenChange: (open: boolean) => void;
+}) {
+  const { t } = useI18n();
+  const tx = t.settings.skills;
+
+  const { data, isLoading, error } = useSkillFileContent(
+    open ? skillName : null,
+    open ? path : null,
+  );
+  const save = useSaveSkillFile();
+
+  const [editing, setEditing] = useState(false);
+  const [draft, setDraft] = useState("");
+
+  // Reset editor state whenever a different file is opened or the dialog closes.
+  useEffect(() => {
+    setEditing(false);
+    setDraft("");
+  }, [path, open]);
+
+  const fileEditable = !!data?.editable && treeEditable;
+  const isMarkdown = useMemo(() => {
+    if (!path) return false;
+    const lower = path.toLowerCase();
+    return lower.endsWith(".md") || lower.endsWith(".markdown");
+  }, [path]);
+
+  const dirty = editing && data?.content !== undefined && draft !== data.content;
+
+  function requestClose(next: boolean) {
+    if (!next && dirty) {
+      if (!window.confirm(tx.filesDiscardConfirm)) return;
+    }
+    onOpenChange(next);
+  }
+
+  function startEditing() {
+    if (!data || data.content == null) return;
+    setDraft(data.content);
+    setEditing(true);
+  }
+
+  function cancelEditing() {
+    if (dirty && !window.confirm(tx.filesDiscardConfirm)) return;
+    setEditing(false);
+    setDraft("");
+  }
+
+  async function handleSave() {
+    if (!skillName || !path) return;
+    try {
+      await save.mutateAsync({ skillName, path, content: draft });
+      toast.success(tx.filesSaveSuccess);
+      setEditing(false);
+    } catch (err) {
+      toast.error(err instanceof Error ? err.message : String(err));
+    }
+  }
+
+  async function handleCopyPath() {
+    if (!path) return;
+    await navigator.clipboard.writeText(path);
+    toast.success(tx.filesCopyPathAction);
+  }
+
+  const downloadHref =
+    skillName && path ? getSkillFileDownloadURL(skillName, path) : undefined;
+
+  return (
+    <Dialog open={open} onOpenChange={requestClose}>
+      <DialogContent
+        showCloseButton={false}
+        className="flex flex-col gap-0 overflow-hidden p-0"
+        style={{
+          width: "min(56rem, calc(100vw - 2rem))",
+          maxWidth: "none",
+          height: "min(720px, calc(100dvh - 2rem))",
+        }}
+      >
+        <DialogHeader className="shrink-0 border-b px-5 py-3">
+          <div className="flex items-start justify-between gap-2">
+            <div className="min-w-0 flex-1">
+              <DialogTitle className="truncate font-mono text-sm">
+                {path ?? ""}
+              </DialogTitle>
+              <DialogDescription className="mt-0.5 truncate text-xs">
+                {skillName}
+                {data ? ` · ${formatBytes(data.size)} · ${data.mime}` : null}
+              </DialogDescription>
+            </div>
+            <div className="flex shrink-0 items-center gap-1">
+              {fileEditable && !editing && data?.is_text && (
+                <Button
+                  size="sm"
+                  variant="ghost"
+                  className="text-muted-foreground hover:text-foreground h-7 px-2 text-xs"
+                  onClick={startEditing}
+                >
+                  <PencilIcon className="size-3.5" />
+                  {tx.filesEditAction}
+                </Button>
+              )}
+              {editing && (
+                <>
+                  <Button
+                    size="sm"
+                    variant="outline"
+                    className="h-7 px-2 text-xs"
+                    onClick={cancelEditing}
+                    disabled={save.isPending}
+                  >
+                    {tx.filesCancelEditAction}
+                  </Button>
+                  <Button
+                    size="sm"
+                    className="h-7 px-2 text-xs"
+                    onClick={() => void handleSave()}
+                    disabled={save.isPending || !dirty}
+                  >
+                    {save.isPending && <Loader2 className="size-3.5 animate-spin" />}
+                    {tx.filesSaveAction}
+                  </Button>
+                </>
+              )}
+              {!editing && (
+                <>
+                  <Button
+                    size="sm"
+                    variant="ghost"
+                    className="text-muted-foreground hover:text-foreground h-7 px-2 text-xs"
+                    onClick={() => void handleCopyPath()}
+                  >
+                    <CopyIcon className="size-3.5" />
+                  </Button>
+                  {downloadHref && (
+                    <Button
+                      asChild
+                      size="sm"
+                      variant="ghost"
+                      className="text-muted-foreground hover:text-foreground h-7 px-2 text-xs"
+                    >
+                      <a href={downloadHref} download>
+                        <DownloadIcon className="size-3.5" />
+                      </a>
+                    </Button>
+                  )}
+                </>
+              )}
+              <Button
+                size="sm"
+                variant="ghost"
+                className="text-muted-foreground hover:text-foreground h-7 px-1.5 text-xs"
+                onClick={() => requestClose(false)}
+              >
+                <XIcon className="size-4" />
+              </Button>
+            </div>
+          </div>
+        </DialogHeader>
+
+        <div className="min-h-0 flex-1 overflow-auto px-5 py-4">
+          {isLoading ? (
+            <div className="text-muted-foreground flex items-center justify-center gap-2 py-12 text-sm">
+              <Loader2 className="size-4 animate-spin" />
+              {t.common.loading}
+            </div>
+          ) : error ? (
+            <div className="text-destructive py-6 text-sm">
+              {error instanceof Error ? error.message : String(error)}
+            </div>
+          ) : data == null ? null : editing ? (
+            <Textarea
+              value={draft}
+              onChange={(event) => setDraft(event.currentTarget.value)}
+              autoFocus
+              spellCheck={false}
+              className="h-full min-h-[420px] w-full resize-none font-mono text-xs leading-relaxed"
+            />
+          ) : data.is_text ? (
+            isMarkdown ? (
+              <MarkdownContent
+                className={markdownClassName}
+                content={data.content ?? ""}
+                isLoading={false}
+                remarkPlugins={reasoningPlugins.remarkPlugins}
+                rehypePlugins={reasoningPlugins.rehypePlugins}
+              />
+            ) : (
+              <pre className="text-foreground/80 bg-muted/40 max-w-full overflow-x-auto rounded-lg border p-4 font-mono text-xs leading-relaxed whitespace-pre">
+                {data.content ?? ""}
+              </pre>
+            )
+          ) : isImageMime(data.mime) ? (
+            <div className="flex items-center justify-center">
+              {downloadHref && (
+                <img
+                  src={downloadHref}
+                  alt={data.path}
+                  className="max-h-full max-w-full rounded border"
+                />
+              )}
+            </div>
+          ) : (
+            <div className="text-muted-foreground rounded-lg border border-dashed px-4 py-12 text-center text-sm">
+              <p>{tx.filesPreviewBinary}</p>
+              {downloadHref && (
+                <Button asChild size="sm" variant="outline" className="mt-3">
+                  <a href={downloadHref} download>
+                    <DownloadIcon className="size-3.5" />
+                    {tx.filesDownloadAction}
+                  </a>
+                </Button>
+              )}
+            </div>
+          )}
+        </div>
+      </DialogContent>
+    </Dialog>
+  );
+}
+
+function formatBytes(n: number): string {
+  if (n < 1024) return `${n} B`;
+  if (n < 1024 * 1024) return `${(n / 1024).toFixed(1)} KB`;
+  return `${(n / (1024 * 1024)).toFixed(1)} MB`;
+}

frontend-web/src/components/workspace/skills/skill-file-tree.tsx

@@ -0,0 +1,152 @@
+"use client";
+
+import {
+  ChevronRightIcon,
+  FileCode2Icon,
+  FileIcon,
+  FileJsonIcon,
+  FileTextIcon,
+  FolderIcon,
+  FolderOpenIcon,
+  ImageIcon,
+} from "lucide-react";
+import { useMemo, useState } from "react";
+
+import { cn } from "@/lib/utils";
+import type { SkillFileNode } from "@/core/skills/api";
+
+const CODE_EXTS = new Set([
+  "py", "js", "jsx", "ts", "tsx", "mjs", "cjs",
+  "sh", "bash", "zsh", "ps1",
+  "html", "htm", "css", "scss", "sass", "xml", "svg",
+  "sql", "ini", "toml", "cfg", "env", "yaml", "yml",
+]);
+const IMAGE_EXTS = new Set(["png", "jpg", "jpeg", "gif", "webp", "bmp", "ico", "tiff"]);
+
+function fileIconFor(name: string) {
+  const ext = name.includes(".") ? name.split(".").pop()!.toLowerCase() : "";
+  if (name === "SKILL.md") return FileTextIcon;
+  if (IMAGE_EXTS.has(ext)) return ImageIcon;
+  if (ext === "md" || ext === "markdown" || ext === "txt" || ext === "rst") return FileTextIcon;
+  if (ext === "json" || ext === "jsonl") return FileJsonIcon;
+  if (CODE_EXTS.has(ext)) return FileCode2Icon;
+  return FileIcon;
+}
+
+function TreeRow({
+  node,
+  depth,
+  selectedPath,
+  onOpen,
+}: {
+  node: SkillFileNode;
+  depth: number;
+  selectedPath: string | null;
+  onOpen: (path: string) => void;
+}) {
+  // Top-level (root) auto-expands; nested directories start collapsed.
+  const [open, setOpen] = useState(depth === 0);
+
+  if (node.type === "dir") {
+    const FolderGlyph = open ? FolderOpenIcon : FolderIcon;
+    return (
+      <div>
+        <button
+          type="button"
+          onClick={() => setOpen((value) => !value)}
+          className={cn(
+            "group hover:bg-muted/60 flex w-full items-center gap-1 rounded px-1.5 py-1 text-left text-sm",
+          )}
+          style={{ paddingLeft: 6 + depth * 14 }}
+        >
+          <ChevronRightIcon
+            className={cn(
+              "text-muted-foreground size-3.5 shrink-0 transition-transform",
+              open && "rotate-90",
+            )}
+          />
+          <FolderGlyph className="size-4 shrink-0 text-amber-500/90" />
+          <span className="truncate font-medium">{node.name}</span>
+        </button>
+        {open && node.children && node.children.length > 0 && (
+          <div className="border-border/60 ml-[14px] border-l border-dashed">
+            {node.children.map((child) => (
+              <TreeRow
+                key={child.path || child.name}
+                node={child}
+                depth={depth + 1}
+                selectedPath={selectedPath}
+                onOpen={onOpen}
+              />
+            ))}
+          </div>
+        )}
+      </div>
+    );
+  }
+
+  const Icon = fileIconFor(node.name);
+  const isSelected = selectedPath === node.path;
+  return (
+    <button
+      type="button"
+      onClick={() => onOpen(node.path)}
+      className={cn(
+        "hover:bg-muted/60 flex w-full items-center gap-1.5 rounded px-1.5 py-1 text-left text-sm",
+        isSelected && "bg-primary/10 hover:bg-primary/15",
+      )}
+      style={{ paddingLeft: 6 + depth * 14 + 14 }}
+      title={node.path}
+    >
+      <Icon className="text-muted-foreground size-4 shrink-0" />
+      <span className="truncate">{node.name}</span>
+      {typeof node.size === "number" && (
+        <span className="text-muted-foreground/70 ml-auto shrink-0 text-[10px] tabular-nums">
+          {formatBytes(node.size)}
+        </span>
+      )}
+    </button>
+  );
+}
+
+function formatBytes(n: number): string {
+  if (n < 1024) return `${n} B`;
+  if (n < 1024 * 1024) return `${(n / 1024).toFixed(1)} KB`;
+  return `${(n / (1024 * 1024)).toFixed(1)} MB`;
+}
+
+export function SkillFileTree({
+  root,
+  onOpen,
+  selectedPath,
+  emptyText,
+}: {
+  root: SkillFileNode;
+  onOpen: (path: string) => void;
+  selectedPath: string | null;
+  emptyText: string;
+}) {
+  const isEmpty = useMemo(
+    () => !root.children || root.children.length === 0,
+    [root],
+  );
+
+  if (isEmpty) {
+    return (
+      <div className="text-muted-foreground rounded-lg border border-dashed px-4 py-8 text-center text-sm">
+        {emptyText}
+      </div>
+    );
+  }
+
+  return (
+    <div className="font-mono">
+      <TreeRow
+        node={root}
+        depth={0}
+        selectedPath={selectedPath}
+        onOpen={onOpen}
+      />
+    </div>
+  );
+}

frontend-web/src/components/workspace/workspace-nav-chat-list.tsx

@@ -165,7 +165,7 @@ export function WorkspaceNavChatList({
         )}
       </SidebarMenu>
     </SidebarGroup>
-    {!showCollapseTrigger && <WorkspaceNavStudio />}
+    {/* {!showCollapseTrigger && <WorkspaceNavStudio />} */}
     </>
   );
 }