Keep every bot's computer work in its own workspace folder

Computers now mount only /home/gem/workspace from DATA_DIR/computers/<id>,
so only the workspace persists and goes into the data archive. An older
computer's whole home is moved aside to <id>-home-<ts> (kept, never
archived) and its container recreated once by sync-computers.

Each run works in bots/<bot>/users/<user> (also its cwd and HOME), with
bots/<bot> for work every user shares and workspaces/<id> shared by a
workspace's bots; the coordinator reaches the whole workspace. Computer
tools are gated by withComputerDirs: bash and code start there, file tool
paths and file: URLs outside the run's folders are refused, and so is sudo.
search_computers, import_file and script tools start there too.

The files browser shows members only the bots' folders they reach, their
own user folder in each and their workspaces', with names on the id folders.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

src/pages/admin/files/(partials)/storage-entry-row.tsx

@@ -64,6 +64,7 @@ export default function StorageEntryRow({ entry, selected, onOpenFolder }: Props
                 <Span className="text-[12px] leading-4 text-ink-secondary">
                     {[
                         is_folder ? "Folder" : formatBytes({ bytes: entry.size }),
+                        entry.label || "",
                         entry.modified_at ? relativeTime({ at: entry.modified_at }) : "",
                         entry.file_id ? "Saved by the bot" : "",
                     ]

src/pages/admin/help/(data)/help-topics.ts

@@ -67,7 +67,7 @@ Then tell the bot you're signed in, or click **Hand back** if it asked you to ta
 
 ### If it doesn't work
 
-- **The paste in step 7 or 8 is empty.** Use the computer's code editor instead: switch to **Code**, create a file such as \`cookies.json\`, and paste into it (that paste always works). In the computer's Chrome, open \`file:///home/gem/cookies.json\`, press Ctrl+A then Ctrl+C, and import as in step 8. **Delete the file afterwards.**
+- **The paste in step 7 or 8 is empty.** Use the computer's code editor instead: switch to **Code**, create a file such as \`workspace/cookies.json\`, and paste into it (that paste always works). In the computer's Chrome, open \`file:///home/gem/workspace/cookies.json\`, press Ctrl+A then Ctrl+C, and import as in step 8. **Delete the file afterwards.**
 - **You're signed in, then signed out again soon after.** Google sometimes ends a session it sees used from a new place. Sign out and back in on your own browser, export again, and import straight away. Using the same account and keeping the bot's work regular helps the session last.
 - **Cookie-Editor's icon doesn't show.** You're in the **Browser** view, which shows pages only. Switch to **Desktop**.
 - **Another site still says no.** Make sure you exported while on that site (Cookie-Editor exports the cookies of the site you're on), and that you opened the same site on the computer before importing.`,