Add workspace side panel with files and git

src/server/workspaces/fileTreeService.ts

@@ -0,0 +1,42 @@
+import { lstat, readdir } from "node:fs/promises";
+import { join } from "node:path";
+import { resolveInsideWorkspace } from "./pathSafety.js";
+
+export interface FileTreeEntry {
+  name: string;
+  path: string;
+  type: "file" | "directory" | "symlink";
+  size?: number;
+  modifiedAt?: string;
+}
+
+export interface FileTreeResponse {
+  path: string;
+  entries: FileTreeEntry[];
+  scannedAt: string;
+  truncated: boolean;
+}
+
+const MAX_ENTRIES = 1000;
+
+export async function listWorkspaceTree(rootPath: string, path: string | undefined): Promise<FileTreeResponse> {
+  const { target, relativePath } = await resolveInsideWorkspace(rootPath, path);
+  const stat = await lstat(target);
+  if (!stat.isDirectory()) throw new Error("Path is not a directory");
+
+  const dirents = await readdir(target, { withFileTypes: true });
+  const visible = dirents.filter((entry) => entry.name !== ".git" && entry.name !== "node_modules").sort((a, b) => {
+    if (a.isDirectory() !== b.isDirectory()) return a.isDirectory() ? -1 : 1;
+    return a.name.localeCompare(b.name);
+  });
+  const selected = visible.slice(0, MAX_ENTRIES);
+  const entries = await Promise.all(selected.map(async (entry): Promise<FileTreeEntry> => {
+    const absolute = join(target, entry.name);
+    const childRelative = relativePath === "" ? entry.name : `${relativePath}/${entry.name}`;
+    const childStat = await lstat(absolute);
+    const type: FileTreeEntry["type"] = entry.isDirectory() ? "directory" : entry.isSymbolicLink() ? "symlink" : "file";
+    return { name: entry.name, path: childRelative, type, size: childStat.size, modifiedAt: childStat.mtime.toISOString() };
+  }));
+
+  return { path: relativePath, entries, scannedAt: new Date().toISOString(), truncated: visible.length > selected.length };
+}