Install-this-app, remove-app, the extension install flow (install,
already installed, installed, not found, failed) and the add-on restart
question were still bare OS message boxes titled "theseus-navigator"
after page dialogs moved to the sheet. askSheet() is a drop-in for
dialog.showMessageBox with the same options and result: title as the
headline, detail under it, the caller's buttons with the default first,
an optional checkbox, and the app's or extension's icon when there is
one. Tone follows the box type (error, warning) or the wording. The
native box stays as the fallback when the browser window is not there,
and for the two synchronous cases (beforeunload, app windows).
The sheet now follows the notification-card pattern: a tone icon in a
tinted circle, the message in bold under a "who says" caption, a
tinted primary action and a quiet Cancel, close in the corner. The tone
is read from the message — delete/remove/error reads as destructive
(red, and the confirm button says Yes), unsaved/required/leave as a
warning, saved/completed as success, anything else as plain info —
since a page hands over only a sentence.
Also decide "who says" from the sender's current URL rather than the
tab's prov, which lags a navigation: a tab that had just left the home
page for a site was still labelled Theseus.
alert / confirm / prompt from a page came up as bare OS message boxes
titled "theseus-navigator" (the package name), with no hint of who was
asking and nothing of the browser's styling — the PDF Editor's "Delete
signature?" was the reported case.
The session preload replaces the page's three functions with wrappers
that hand the call to the isolated world through a DOM event, which
asks main synchronously and writes the answer back; pages see Chrome's
return values (confirm → boolean, prompt → string or null) and no new
global. Main answers from a sheet hanging under the toolbar, in the
same surface as add-on approvals, that names who is asking: the site's
host, the add-on's name for an add-on page or panel (identified by its
path under the profile's extensions directory), or Theseus for its own
pages. The sheet belongs to the tab that asked — hidden while another
tab is in front, back when its tab returns — and a closing tab or
window answers "cancel" so no renderer stays blocked. Windows without
the chrome (installed apps, plain windows) get a native box with a
proper title, and app.name now reads "Theseus Navigator" for whatever
else still shows one.
