Merge main into the desktop redesign branch

Four conflicts. Three were two people adding to the same spot, and one was a
real collision: main gave the connect bar a REMEMBER tick in the same pass that
this branch took the connect bar off the hosts screen.

REMEMBER is now in the drawer, beside the password box it qualifies. Nothing
about the feature changed — RemembersConnectPassword, its refusal to fire until
the remote has accepted the password, and the six tests over it are main's
untouched — only where it is drawn. The move improves it slightly and it is
worth saying why rather than claiming a merge was neutral: the bar had one row
and had to fit the box, the tick, the authentication note and CONNECT along it,
which is why the tick was a bare "REMEMBER" in tracked capitals. A column has
room to put it under the box as a sentence, where it reads as a property of the
password rather than as a fourth control in a row.

MainWindowViewModel: both sides added members after ShowTerminal — the desktop's
three fixed tabs here, the phone's connect menu on main. They do not interact,
so both are kept, each under its own heading.

TeamsScreen: main added the team's own RENAME, HAND OVER and ARCHIVE, a member's
LastActive, the role a new member arrives as, and the KEY HOLDERS list. This
branch had only bumped the file's font sizes a point. Resolved by taking main's
file whole and re-running the bump over it, so the new controls join the scale
rather than sitting a point below everything around them.

README: both sides described a different head's third pass in the same
paragraph. Both kept.

Two things checked rather than assumed, because this branch moved the furniture
the merged commits sit on. The chrome heights main's terminal work touched are
the phone's, not the desktop's — 44, 42 and 24 are unchanged, so the layout
harness's budget still describes the window. And main's keychain DELETE did not
reach VaultScreen.axaml, whose header this branch rearranged, so the five
buttons that overflowed at the larger type are still five.

2415 tests pass, up from 2369 by the 46 main brought.

src/DodoSSH.Client.App/Views/HostDrawer.axaml

@@ -106,12 +106,24 @@
 
             It is here rather than in a bar across the top of the screen, which is where it used to be: the
             password belongs to the host, and a box at the top of a grid of forty machines is one whose
-            subject you have to work out.
+            subject you have to work out. That move is also what this arrangement is for — the bar had one
+            row and had to fit the box, the tick, the note and CONNECT along it; a column has room to put
+            the tick under the box it qualifies, which is where it reads as a property of the password
+            rather than as a fourth control in a row.
+
+            REMEMBER travels with the box and hides with it. It is the two-step chore the box's tooltip used
+            to describe — add a password under Keychain, then bind the host to it — done from the one place
+            that already has the password, and it takes effect only once the remote has accepted it.
           -->
-          <TextBox Text="{Binding ConnectPassword}" PlaceholderText="password (not stored)"
+          <TextBox Text="{Binding ConnectPassword}" PlaceholderText="password"
                    PasswordChar="•" HorizontalAlignment="Stretch"
                    IsVisible="{Binding SelectedHostAsksForAPassword}"
-                   ToolTip.Tip="Typed each time and never stored. To stop typing it, add a password under Keychain and bind this host to it in the host's own editor." />
+                   ToolTip.Tip="Typed each time unless REMEMBER is ticked, in which case it is saved to your keychain and bound to this host once the connection succeeds." />
+          <CheckBox IsChecked="{Binding RemembersConnectPassword}"
+                    IsVisible="{Binding SelectedHostAsksForAPassword}"
+                    ToolTip.Tip="Saves this password to your keychain, bound to this host, so it is not asked for again. It syncs to your other machines, and only happens if the connection works.">
+            <TextBlock Text="Remember this password" Classes="hint" FontSize="12" />
+          </CheckBox>
 
           <StackPanel Orientation="Horizontal" Spacing="6" IsVisible="{Binding ShowsHostActions}">
             <Button Classes="accent" Content="CONNECT" Command="{Binding ConnectCommand}"