fix(store,doctor): doc-verifier findings on the trust surfaces

The doc-verifier pass over the new trust/exposure surfaces came back
PASS with five improvements, all applied:
- the store policy notice gains a 'Learn more' into the security doc
  (the notice named security.require_signatures but not where it
  lives)
- 'blocked' disables the trust gate's install button — an active
  button contradicted the 'install would be refused' statement right
  above it (guard test added)
- the unknown-exposure tooltip now says what the operator can do
  (check where the name resolves)
- dead l10n key verifPillUnverified removed (unverified is the
  page-level notice, never a card pill)
- stale header comment in install_verification.dart corrected

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

lib/data/install_verification.dart

@@ -2,8 +2,9 @@
 // per-entry statement of how an install would be verified under
 // the CURRENT policy (computed hub-side with the same resolvers
 // the install gate enforces). One mapping, used by the trust-gate
-// dialog, the module detail sheet and the store card, so every
-// surface tells the same story.
+// dialog and the store card's blocked pill, so every surface
+// tells the same story. (The module detail sheet routes installs
+// through the dialog and needs no copy of its own.)
 
 import '../l10n/app_localizations.dart';
 

lib/l10n/app_de.arb

@@ -1194,7 +1194,7 @@
   "svcExposurePublic": "öffentlich erreichbar",
   "svcExposureUnknown": "Reichweite unbekannt",
   "svcExposurePublicHint": "Dieser Dienst-Endpunkt liegt auf einer öffentlichen Adresse — prüfen Sie, ob er abgesichert ist (TLS, Auth, Firewall).",
-  "svcExposureUnknownHint": "Hostname statt IP-Adresse — der Hub löst zur Einstufung bewusst keine Namen auf.",
+  "svcExposureUnknownHint": "Hostname statt IP-Adresse — der Hub löst zur Einstufung bewusst keine Namen auf. Prüfen Sie selbst, wohin der Name zeigt.",
   "doctorLinkStore": "Store öffnen",
   "doctorLinkApprovals": "Freigaben öffnen",
   "doctorLinkAudit": "Protokoll öffnen",
@@ -1629,7 +1629,6 @@
   "installConfirmTrustTitle": "Vertrauen & Sicherheit",
   "installConfirmTrustBody": "Das Modul läuft in einer Sandbox: Es darf nur auf die Netzwerk-Endpunkte, Dateien und Umgebungsvariablen zugreifen, die es selbst deklariert — der Hub setzt diese Liste durch. Die vollständige Berechtigungsliste sehen Sie nach der Installation in den Modul-Details.",
   "storePolicyUnverifiedNotice": "Die Signaturpflicht ist in der Hub-Richtlinie ausgeschaltet — Installationen werden nicht kryptografisch geprüft. Der Installations-Dialog zeigt den Status je Modul; für geprüfte Installationen security.require_signatures aktivieren.",
-  "verifPillUnverified": "unsigniert",
   "verifPillBlocked": "blockiert",
   "verifPinnedKey": "Signatur wird geprüft — hinterlegter Store-Schlüssel",
   "verifPinnedKeyBody": "Der Hub verifiziert das Paket beim Installieren gegen den fest hinterlegten Schlüssel dieser Quelle. Ein manipuliertes Paket wird abgelehnt.",

lib/l10n/app_en.arb

@@ -1218,7 +1218,7 @@
   "svcExposurePublic": "publicly reachable",
   "svcExposureUnknown": "reach unknown",
   "svcExposurePublicHint": "This service endpoint sits on a public address — make sure it is protected (TLS, auth, firewall).",
-  "svcExposureUnknownHint": "Hostname instead of an IP address — the hub deliberately does not resolve names to classify.",
+  "svcExposureUnknownHint": "Hostname instead of an IP address — the hub deliberately does not resolve names to classify. Check yourself where the name resolves.",
   "doctorLinkStore": "Open the store",
   "doctorLinkApprovals": "Open approvals",
   "doctorLinkAudit": "Open the audit log",
@@ -1653,7 +1653,6 @@
   "installConfirmTrustTitle": "Trust & security",
   "installConfirmTrustBody": "The module runs in a sandbox: it may only touch the network endpoints, files, and environment variables it declares itself — the hub enforces that list. The full permission list is visible in the module details after installation.",
   "storePolicyUnverifiedNotice": "Signature enforcement is switched off in the hub policy — installs are not cryptographically verified. The install dialog shows the per-module status; enable security.require_signatures for verified installs.",
-  "verifPillUnverified": "unsigned",
   "verifPillBlocked": "blocked",
   "verifPinnedKey": "Signature checked — pinned store key",
   "verifPinnedKeyBody": "The hub verifies the bundle at install time against this source's pinned key. A tampered bundle is refused.",

lib/l10n/app_localizations.dart

@@ -3725,7 +3725,7 @@ abstract class AppLocalizations {
   /// No description provided for @svcExposureUnknownHint.
   ///
   /// In en, this message translates to:
-  /// **'Hostname instead of an IP address — the hub deliberately does not resolve names to classify.'**
+  /// **'Hostname instead of an IP address — the hub deliberately does not resolve names to classify. Check yourself where the name resolves.'**
   String get svcExposureUnknownHint;
 
   /// No description provided for @doctorLinkStore.
@@ -4940,12 +4940,6 @@ abstract class AppLocalizations {
   /// **'Signature enforcement is switched off in the hub policy — installs are not cryptographically verified. The install dialog shows the per-module status; enable security.require_signatures for verified installs.'**
   String get storePolicyUnverifiedNotice;
 
-  /// No description provided for @verifPillUnverified.
-  ///
-  /// In en, this message translates to:
-  /// **'unsigned'**
-  String get verifPillUnverified;
-
   /// No description provided for @verifPillBlocked.
   ///
   /// In en, this message translates to:

lib/l10n/app_localizations_de.dart

@@ -2167,7 +2167,7 @@ class AppLocalizationsDe extends AppLocalizations {
 
   @override
   String get svcExposureUnknownHint =>
-      'Hostname statt IP-Adresse — der Hub löst zur Einstufung bewusst keine Namen auf.';
+      'Hostname statt IP-Adresse — der Hub löst zur Einstufung bewusst keine Namen auf. Prüfen Sie selbst, wohin der Name zeigt.';
 
   @override
   String get doctorLinkStore => 'Store öffnen';
@@ -2910,9 +2910,6 @@ class AppLocalizationsDe extends AppLocalizations {
   String get storePolicyUnverifiedNotice =>
       'Die Signaturpflicht ist in der Hub-Richtlinie ausgeschaltet — Installationen werden nicht kryptografisch geprüft. Der Installations-Dialog zeigt den Status je Modul; für geprüfte Installationen security.require_signatures aktivieren.';
 
-  @override
-  String get verifPillUnverified => 'unsigniert';
-
   @override
   String get verifPillBlocked => 'blockiert';
 

lib/l10n/app_localizations_en.dart

@@ -2171,7 +2171,7 @@ class AppLocalizationsEn extends AppLocalizations {
 
   @override
   String get svcExposureUnknownHint =>
-      'Hostname instead of an IP address — the hub deliberately does not resolve names to classify.';
+      'Hostname instead of an IP address — the hub deliberately does not resolve names to classify. Check yourself where the name resolves.';
 
   @override
   String get doctorLinkStore => 'Open the store';
@@ -2906,9 +2906,6 @@ class AppLocalizationsEn extends AppLocalizations {
   String get storePolicyUnverifiedNotice =>
       'Signature enforcement is switched off in the hub policy — installs are not cryptographically verified. The install dialog shows the per-module status; enable security.require_signatures for verified installs.';
 
-  @override
-  String get verifPillUnverified => 'unsigned';
-
   @override
   String get verifPillBlocked => 'blocked';
 

lib/pages/store.dart

@@ -15,6 +15,7 @@ import 'package:flutter_markdown_plus/flutter_markdown_plus.dart';
 import '../data/error_presentation.dart';
 import '../data/hub.dart';
 import '../data/install_verification.dart';
+import 'welcome.dart' show showFaiDoc;
 import '../data/system_actions.dart';
 import '../data/today_story_loader.dart';
 import '../l10n/app_localizations.dart';
@@ -399,6 +400,12 @@ class _StorePageState extends State<StorePage> {
                             child: ChainInlineHelp(
                               icon: Icons.gpp_maybe_outlined,
                               text: l.storePolicyUnverifiedNotice,
+                              // One click to the security doc that
+                              // explains WHERE the key lives
+                              // (doc-verifier finding).
+                              onLearnMore: () =>
+                                  showFaiDoc(context, 'security'),
+                              learnMoreLabel: l.buttonLearnMore,
                             ),
                           ),
                         if (_aiThinking ||

lib/widgets/chain_install_confirm.dart

@@ -258,7 +258,13 @@ class ChainInstallConfirmDialog extends StatelessWidget {
           child: Text(l.buttonCancel),
         ),
         FilledButton(
-          onPressed: () => Navigator.pop(context, true),
+          // "blocked" means the hub WOULD refuse this install (policy
+          // demands signatures, no key material for this source) —
+          // offering an active Install button would contradict the
+          // statement right above it (doc-verifier finding).
+          onPressed: item.installVerification == 'blocked'
+              ? null
+              : () => Navigator.pop(context, true),
           child: Text(l.buttonInstall),
         ),
       ],