[quickbeard]

Follow-up to #300. That PR made an unselected project list nothing — correct, and what you observed — but switching Code/Work is a path that leaves the project unselected while restoring a session, so the two combined into a sidebar with an open session and an empty Recents.

Problem

useWorkspaceSwitch's enter() sets a selection carrying a server only, then returns the moment it resumes the side's last session:

if (layout.home.selection().server !== server) layout.home.setSelection({ server })   // no directory
...
if (last && lastServer && (await folder.sessionAlive(...))) {
  navigate(sessionHref(last.server, last.sessionId))
  return                                                    // never picks a folder
}

So the session and its tabs came back while the sidebar sat on no project: Projects unhighlighted, Pinned and Recents empty. The fallback path below it does not have this problem — it ends in enterFolder, which selects a folder.

Fix

When resuming, also select the project that session lives in — the folder of the server's project list that owns the session's directory, since a session can sit in a subdirectory of one. That folder is also recorded as the server's last project, so a later launch seeds the same one #300 would pick.

The rule is extracted as a pure sessionProjectSelection in workspace/side.ts, beside folderEntry and for the reason that file already documents: the Work side has no sandbox platform in the web e2e harness, so this decision cannot be driven from a browser.

Verification

Three unit tests: the plain case, a session nested inside its project, and selecting nothing rather than guessing when the directory has not loaded or belongs to no listed project.

test:browser 130 pass, test:unit 690 pass, #300's two e2e specs still pass, typecheck clean.

Not verified in the running app. Code↔Work needs a real sandbox platform, which neither the browser harness nor my environment can drive — the same limitation side.ts already calls out. Worth one switch each way before merging.

DIVERGENCES: the Code/Work split row extended with this behaviour. CHANGELOG entry under Desktop / Web UI.

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