feat(studio): temporal source bucket + provenance pill on store grid

Adds the missing UI surface for SPARK / Temporal federated
capabilities. Previously only mcp and n8n showed provenance
pills; temporal-sourced entries fell through to the default
"no badge" case.

  - storeSourceTemporal + storeProvenanceTemporal l10n keys
    (en + de). Pill format: "temporal · <provider>", icon
    Icons.timer_outlined, accent tone.
  - Source filter chip row gains a "Temporal" option in the
    Store filter dialog.
  - `_StoreProvenancePill` adds a `case 'temporal'` branch.

Operators federating a SPARK cluster (`services: -
kind: temporal`) now see their workflows visually labelled
as Temporal-sourced in the Store grid + filter UI.

dart analyze green. No test changes required — the
provenance pill is render-only.

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

lib/l10n/app_localizations.dart

@@ -3565,6 +3565,18 @@ abstract class AppLocalizations {
   /// In en, this message translates to:
   /// **'Pull failed: {error}'**
   String systemAiPullFailedError(String error);
+
+  /// No description provided for @storeProvenanceTemporal.
+  ///
+  /// In en, this message translates to:
+  /// **'temporal · {provider}'**
+  String storeProvenanceTemporal(String provider);
+
+  /// No description provided for @storeSourceTemporal.
+  ///
+  /// In en, this message translates to:
+  /// **'Temporal'**
+  String get storeSourceTemporal;
 }
 
 class _AppLocalizationsDelegate

lib/l10n/app_localizations_de.dart

@@ -2084,4 +2084,12 @@ class AppLocalizationsDe extends AppLocalizations {
   String systemAiPullFailedError(String error) {
     return 'Pull fehlgeschlagen: $error';
   }
+
+  @override
+  String storeProvenanceTemporal(String provider) {
+    return 'temporal · $provider';
+  }
+
+  @override
+  String get storeSourceTemporal => 'Temporal';
 }

lib/l10n/app_localizations_en.dart

@@ -2090,4 +2090,12 @@ class AppLocalizationsEn extends AppLocalizations {
   String systemAiPullFailedError(String error) {
     return 'Pull failed: $error';
   }
+
+  @override
+  String storeProvenanceTemporal(String provider) {
+    return 'temporal · $provider';
+  }
+
+  @override
+  String get storeSourceTemporal => 'Temporal';
 }

lib/pages/store.dart

@@ -1030,6 +1030,7 @@ class _FilterDialogState extends State<_FilterDialog> {
                 (value: 'native', label: l.storeSourceNative),
                 (value: 'mcp', label: l.storeSourceMcp),
                 (value: 'n8n', label: l.storeSourceN8n),
+                (value: 'temporal', label: l.storeSourceTemporal),
               ],
               _source,
               (v) => setState(() => _source = v),
@@ -3355,6 +3356,13 @@ class _ProvenancePill extends StatelessWidget {
           monospace: true,
           icon: Icons.account_tree_outlined,
         );
+      case 'temporal':
+        return FaiPill(
+          label: l.storeProvenanceTemporal(item.provider),
+          tone: FaiPillTone.accent,
+          monospace: true,
+          icon: Icons.timer_outlined,
+        );
       default:
         // Native is the default: no badge needed. Keeps the
         // card visually quiet — only foreign code (mcp / n8n)