feat: v2.7.7 — File Explorer on workspaces and the user's home, clone with per-user git identity

- File Explorer (Files in the sidebar, /files; also from a workspace's Files
  tab, portalled so no panel clips it), laid out like GNOME Files: places
  (Home, workspaces, Trash), Back/Forward/Up, path bar, search, icon grid with
  image thumbnails or list, labelled New/Upload, selection action bar, hidden
  files behind Ctrl+H, right-click menus and the usual keys.
  Make, rename, move, copy (within a workspace, between workspaces, home ↔
  workspace), delete into a per-account trash restorable for 7 days, streamed
  upload of files and whole folders (≤ 500 MB a batch, Replace / Keep both /
  Skip on a taken name), download a file or a zip of anything.
  server/lib/file-explorer.js, /api/lanes/:id/fs/*, /api/homes/:who/fs/*.
- The user's home: every dot entry at its top stays hidden and refused
  (also via a symlink, download, zip or as a copy source); an admin may view
  other users' homes read-only, audited.
- write-as learns move/copy (re-run `sudo agenthub server install-system`).
- Hardening: a write to a workspace re-checks its owner by the live role;
  S3 keeps its server.conf if the file stops reading and a tmux call never
  falls back to the host's server; the AI Proxy gateway marks what it relays
  and the dashboard refuses it; a NUL in a pane's argv/env is refused.
- OpenAPI for the new routes (server/openapi-extra/files.js); docs (API,
  SERVER-MODE, CLAUDE.md) updated.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

client/src/pages/FilesPage.tsx

@@ -0,0 +1,77 @@
+/**
+ * @file FilesPage.tsx
+ * @description `/files` — the file manager (`FileBrowser`) as a page of its
+ * own, reached from the sidebar's **Files** entry. The location is kept in the
+ * URL (`?home=<me|user>&path=` or `?lane=<id>&path=`), so Back and a shared
+ * link land in the same folder. With neither it opens the user's own HOME
+ * (their Linux home under S3), or — where they have none — the last
+ * workspace shown (`agenthub.workspace.selected`), else the first.
+ * @author Nguyễn Ngọc Trí Vĩ <vinnt@smartgift.vn>
+ */
+
+import { useEffect, useState } from "react";
+import { useSearchParams } from "react-router-dom";
+import { useTranslation } from "react-i18next";
+import { api, isHomePlace, type FsPlace } from "../lib/api";
+import { FileBrowser } from "../components/lanes/FileExplorer";
+
+function lastWorkspace(): number | null {
+  try {
+    const v = Number(localStorage.getItem("agenthub.workspace.selected"));
+    return Number.isInteger(v) && v > 0 ? v : null;
+  } catch {
+    return null;
+  }
+}
+
+type Start = { lane: number } | { home: string };
+
+export function FilesPage() {
+  const { t } = useTranslation(["lanes"]);
+  const [params, setParams] = useSearchParams();
+  const askedLane = Number(params.get("lane"));
+  const askedHome = params.get("home");
+  const [start, setStart] = useState<Start | null>(
+    askedHome
+      ? { home: askedHome }
+      : Number.isInteger(askedLane) && askedLane > 0
+        ? { lane: askedLane }
+        : null
+  );
+  const [none, setNone] = useState(false);
+
+  useEffect(() => {
+    if (start) return;
+    void (async () => {
+      const homes = await api.files.homes().catch(() => ({ homes: [] }));
+      if (homes.homes.some((h) => h.id === "me")) return setStart({ home: "me" });
+      const { lanes } = await api.lanes.list().catch(() => ({ lanes: [] }));
+      const last = lastWorkspace();
+      const pick = lanes.find((l) => l.id === last) ?? lanes[0];
+      if (pick) setStart({ lane: pick.id });
+      else setNone(true);
+    })();
+  }, [start]);
+
+  if (none) return <p className="p-8 text-sm text-fg-muted">{t("fx.noWorkspace")}</p>;
+  if (!start) return null;
+  return (
+    // Cancels Layout's page padding, like the Workspace session view.
+    <div className="-m-5 flex h-[calc(100vh-1.5rem)] max-md:h-[calc(100vh-4.25rem)] lg:-m-6">
+      <FileBrowser
+        laneId={"lane" in start ? start.lane : null}
+        initialHome={"home" in start ? start.home : null}
+        initialPath={params.get("path") ?? ""}
+        onNavigate={(place: FsPlace, path) => {
+          const next = new URLSearchParams(
+            isHomePlace(place)
+              ? { home: place.home }
+              : { lane: String(typeof place === "number" ? place : place.lane) }
+          );
+          if (path) next.set("path", path);
+          setParams(next, { replace: false });
+        }}
+      />
+    </div>
+  );
+}

client/src/pages/__tests__/__snapshots__/screens.snapshot.test.tsx.snap

@@ -7178,7 +7178,7 @@ exports[`screen snapshots > Settings — about 1`] = `
                 <span
                   class="text-status-warning/90"
                 >
-                  UI build v2.7.6 (rebuild client to match)
+                  UI build v2.7.7 (rebuild client to match)
                 </span>
               </p>
             </div>