pin the app types on the four locked screens that had none

The allow-list existed on fourteen screens and was missing from every other one, which the previous
commit turned from fifty lines into one. These four are locked — the user cannot change what is in
the panel — so an appType that stops resolving strands them on the empty teal box in PanelSlot with
no picker and no way back.

Checked against what is actually persisted rather than against the defaults: `screens/desktop` holds
`officerdev/desktop` and `screens/files` holds `officerdev/file-browser`, both already inside the
list they are now being given. `screens/terminal` and `screens/dashboards` have no row at all — those
screens have never been opened on this machine — so they seed from the default, which also matches.
Nothing is rewritten by this.

Browser and Email stay unguarded on purpose. Their panels resolve through `components`, which
PanelSlot keys on the *panel id*, and their layouts carry `appType: null` — the app type is never
consulted, so pinning it would pin nothing.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

src/apps/officer-web/Screens/Dashboard/Dashboards/DashboardsScreen.tsx

@@ -18,6 +18,7 @@ export const DashboardsScreen = () => {
       <WorkspaceView
         workspace={workspace}
         locked
+        appTypes={{ allowed: ['dashboard-list', 'dashboard-preview'], fallback: 'dashboard-preview' }}
         mobilePanelId={mobilePanelId}
         onMobilePanelChange={(id) => {
           if (!id)