fix(l10n): low-severity language findings from the usertest panel

- 'Mit Endpunkt verbinden' — no Endpoint/Endpunkt mix
- audit-chain lead term is 'Hash-Kette' everywhere (doctor pill);
  chain detail says 'Verkettung lückenlos geprüft' instead of the
  raw field name prev_event_sha256
- welcome checklist line says who refreshes what
- setup privacy note explains the local model instead of ending in
  a bare model tag
- default project renders localized ('Allgemein') in the switcher;
  sealed-area status pills explain run state on hover

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

lib/widgets/chain_workspace_switcher.dart

@@ -11,6 +11,7 @@
 
 import 'package:flutter/material.dart';
 
+import '../data/hub.dart' show ProjectRef;
 import '../data/sealed_areas.dart';
 import '../data/workspace.dart';
 import '../l10n/app_localizations.dart';
@@ -36,7 +37,11 @@ class ChainWorkspaceSwitcher extends StatelessWidget {
 
         final label = ws.inSealedArea
             ? ws.activeSealed!.name
-            : (ws.isAll ? l.workspaceAll : (ws.active?.name ?? ws.activeSlug));
+            : (ws.isAll
+                  ? l.workspaceAll
+                  : (ws.active == null
+                        ? ws.activeSlug
+                        : _projectLabel(l, ws.active!)));
 
         return Tooltip(
           message: l.workspaceSwitcherTooltip,
@@ -82,7 +87,12 @@ class ChainWorkspaceSwitcher extends StatelessWidget {
             children: [
               _ProjectDot(color: p.color),
               const SizedBox(width: ChainSpace.sm),
-              Flexible(child: Text(p.name, overflow: TextOverflow.ellipsis)),
+              Flexible(
+                child: Text(
+                  _projectLabel(l, p),
+                  overflow: TextOverflow.ellipsis,
+                ),
+              ),
               if (p.isProtected) ...[
                 const SizedBox(width: ChainSpace.sm),
                 Tooltip(
@@ -130,12 +140,19 @@ class ChainWorkspaceSwitcher extends StatelessWidget {
                 const SizedBox(width: 4),
                 Flexible(child: Text(a.name, overflow: TextOverflow.ellipsis)),
                 const SizedBox(width: ChainSpace.sm),
-                Text(
-                  a.running ? l.workspaceSealedRunning : l.workspaceSealedStopped,
-                  style: theme.textTheme.labelSmall?.copyWith(
-                    color: a.running
-                        ? ChainColors.success
-                        : theme.colorScheme.onSurfaceVariant,
+                Tooltip(
+                  message: a.running
+                      ? l.workspaceSealedRunningHint
+                      : l.workspaceSealedStoppedHint,
+                  child: Text(
+                    a.running
+                        ? l.workspaceSealedRunning
+                        : l.workspaceSealedStopped,
+                    style: theme.textTheme.labelSmall?.copyWith(
+                      color: a.running
+                          ? ChainColors.success
+                          : theme.colorScheme.onSurfaceVariant,
+                    ),
                   ),
                 ),
               ],
@@ -266,6 +283,12 @@ class ChainWorkspaceSwitcher extends StatelessWidget {
   }
 }
 
+/// Display name for a registry project. The hub's default project
+/// carries the fixed English name "General"; render it localized
+/// ("Allgemein") so no English label sits in the German menu.
+String _projectLabel(AppLocalizations l, ProjectRef p) =>
+    p.slug == 'general' ? l.workspaceDefaultProject : p.name;
+
 /// The project's registry colour as a small marking dot. Falls back
 /// to the theme's outline colour when unset.
 class _ProjectDot extends StatelessWidget {