feat: 文件树拖拽到输入框生成 ContextMention（文件+目录）

src/__tests__/unit/claude-session-parser.test.ts

@@ -10,12 +10,19 @@ import assert from 'node:assert/strict';
 import fs from 'fs';
 import path from 'path';
 import os from 'os';
+import { pathToFileURL } from 'node:url';
 
 // We test the parser functions by creating temporary JSONL files
 // that mimic Claude Code's session storage format.
 
 const TEST_DIR = path.join(os.tmpdir(), `codepilot-test-sessions-${Date.now()}`);
 const PROJECTS_DIR = path.join(TEST_DIR, '.claude', 'projects');
+const originalEnv = {
+  HOME: process.env.HOME,
+  USERPROFILE: process.env.USERPROFILE,
+  HOMEDRIVE: process.env.HOMEDRIVE,
+  HOMEPATH: process.env.HOMEPATH,
+};
 
 // Helper to create a JSONL session file
 function createSessionFile(
@@ -121,18 +128,25 @@ describe('claude-session-parser', () => {
   let parser: typeof import('../../lib/claude-session-parser');
 
   before(async () => {
-    // Set HOME to our test directory so the parser looks for sessions there
+    // Point all common home env vars to test dir so os.homedir() is deterministic on Windows/macOS/Linux.
+    const parsed = path.parse(TEST_DIR);
     process.env.HOME = TEST_DIR;
+    process.env.USERPROFILE = TEST_DIR;
+    process.env.HOMEDRIVE = parsed.root.replace(/[\\\/]$/, '');
+    process.env.HOMEPATH = TEST_DIR.slice(parsed.root.length - 1);
 
     // Dynamic import - tsx handles the TypeScript + path alias resolution
-    parser = await import(parserPath);
+    parser = await import(pathToFileURL(parserPath).href);
   });
 
   after(() => {
     // Clean up test directory
     fs.rmSync(TEST_DIR, { recursive: true, force: true });
-    // Restore HOME
-    process.env.HOME = os.homedir();
+    // Restore env
+    process.env.HOME = originalEnv.HOME;
+    process.env.USERPROFILE = originalEnv.USERPROFILE;
+    process.env.HOMEDRIVE = originalEnv.HOMEDRIVE;
+    process.env.HOMEPATH = originalEnv.HOMEPATH;
   });
 
   describe('decodeProjectPath', () => {

src/components/ai-elements/file-tree.tsx

@@ -24,6 +24,10 @@ import {
   useState,
 } from "react";
 
+const FILE_TREE_DRAG_MIME = "application/x-codepilot-path";
+// Keep a text/* fallback because some drag-and-drop consumers strip unknown custom MIME types.
+const FILE_TREE_DRAG_FALLBACK_MIME = "text/x-codepilot-path";
+
 interface FileTreeContextType {
   expandedPaths: Set<string>;
   togglePath: (path: string) => void;
@@ -132,6 +136,17 @@ export const FileTreeFolder = ({
     togglePath(path);
   }, [togglePath, path]);
 
+  const handleDragStart = useCallback(
+    (e: React.DragEvent) => {
+      const payload = JSON.stringify({ path, name, type: "directory" });
+      e.dataTransfer.setData(FILE_TREE_DRAG_MIME, payload);
+      e.dataTransfer.setData(FILE_TREE_DRAG_FALLBACK_MIME, payload);
+      e.dataTransfer.setData("text/plain", path);
+      e.dataTransfer.effectAllowed = "copy";
+    },
+    [name, path]
+  );
+
   const folderContextValue = useMemo(
     () => ({ isExpanded, name, path }),
     [isExpanded, name, path]
@@ -148,6 +163,8 @@ export const FileTreeFolder = ({
         >
           <div
             className="flex w-full items-center gap-1 rounded px-2 py-1 text-left transition-colors hover:bg-muted/50"
+            draggable
+            onDragStart={handleDragStart}
           >
             <CollapsibleTrigger asChild>
               <button
@@ -232,6 +249,17 @@ export const FileTreeFile = ({
 
   const fileContextValue = useMemo(() => ({ name, path }), [name, path]);
 
+  const handleDragStart = useCallback(
+    (e: React.DragEvent) => {
+      const payload = JSON.stringify({ path, name, type: "file" });
+      e.dataTransfer.setData(FILE_TREE_DRAG_MIME, payload);
+      e.dataTransfer.setData(FILE_TREE_DRAG_FALLBACK_MIME, payload);
+      e.dataTransfer.setData("text/plain", path);
+      e.dataTransfer.effectAllowed = "copy";
+    },
+    [name, path]
+  );
+
   return (
     <FileTreeFileContext.Provider value={fileContextValue}>
       <div
@@ -242,6 +270,8 @@ export const FileTreeFile = ({
         )}
         onClick={handleClick}
         onKeyDown={handleKeyDown}
+        draggable
+        onDragStart={handleDragStart}
         role="treeitem"
         tabIndex={0}
         {...props}