feat(workspace): sealed-area names are confidential by default

The switcher listed sealed areas by name ('lbs', 'stromnetz') on
any glance or screenshot — but the names themselves often carry
client/mandate identity (usertest security finding). The sealed
section now renders one aggregated row ('2 sealed areas') with a
deliberate 'Show names' reveal per menu opening; selection still
pops the regular s:<slug> value. Settings -> Security gains 'list
sealed areas with their names right away' (WorkspacePrefs,
SidebarPrefs pattern, default off).

The aggregate row wraps to two lines — popup menus cap their
width and action texts must never be truncated (the first cut
showed '1 abgeschotte…' in the proof shot). Guard: switcher tests
cover aggregated-until-reveal and the Settings toggle; the old
direct-listing test now asserts the reveal contract. DE+EN.

Signed-off-by: flemming-it <stefan.a.flemming@googlemail.com>

lib/l10n/app_de.arb

@@ -1799,6 +1799,11 @@
   "runsPhaseUnknown": "Unbekannt",
   "navRuns": "Läufe",
   "workspaceSealedHeader": "ABGESCHOTTETE BEREICHE",
+  "workspaceSealedAggregate": "{n, plural, =1{1 abgeschotteter Bereich} other{{n} abgeschottete Bereiche}}",
+  "@workspaceSealedAggregate": {"placeholders": {"n": {"type": "int"}}},
+  "workspaceSealedRevealAction": "Namen einblenden",
+  "settingsSealedNamesTitle": "Abgeschottete Bereiche direkt mit Namen anzeigen",
+  "settingsSealedNamesBody": "Bereichsnamen können schutzwürdig sein (Kunden-/Mandantenbezug). Standardmäßig zeigt der Projekt-Umschalter sie nur zusammengefasst; die Namen erscheinen erst nach einem Klick.",
   "workspaceSealedRunning": "läuft",
   "workspaceSealedStopped": "gestoppt",
   "workspaceSealedRunningHint": "Der abgeschottete Bereich läuft als eigener Hub-Prozess. Auswählen wechselt hinein.",