feat: multi-clinic Temetro Network with per-clinic identity (v0.8.0)

The relay is now multi-clinic. Each clinic authenticates to the /hub
namespace by signing a challenge with its own Ed25519 clinic signing key
(a per-clinic identity, not a shared RELAY_TOKEN), and the relay routes
every device response back to only the clinic that originated the request
(keyed by requestId) — so clinics never see each other's traffic.

Backend:
- clinic_signing_keys.network_enabled + GET/PUT /api/signing/network
  (owner/admin) to join/leave the network.
- relay-client keeps one authenticated hub connection per network-enabled
  org (connectOrg/disconnectOrg, hubs map keyed by orgId); emitToWallet/
  sendToWallet take orgId; offline flush is org-scoped.
- Wallet import/push return 409 until a clinic joins.
- RELAY_TOKEN is now optional/legacy (open relay needs no shared secret).

Frontend:
- "Join Temetro Network" toggle in Settings → Signing, localized in all
  five languages (en, fr, de, so, ar).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

frontend/components/settings/settings-billing.tsx

@@ -6,6 +6,7 @@ import { useTranslation } from "react-i18next";
 import { cn } from "@/lib/utils";
 import { Badge } from "@/components/ui/badge";
 import { Button } from "@/components/ui/button";
+import { Switch } from "@/components/ui/switch";
 import {
   CopyField,
   SettingsCard,
@@ -13,9 +14,11 @@ import {
   whiteButton,
 } from "@/components/settings/settings-parts";
 import {
+  getNetworkEnabled,
   getSigningKey,
   listSignedRecords,
   rotateSigningKey,
+  setNetworkEnabled,
   type SharedRecord,
   type SigningKey,
 } from "@/lib/signing";
@@ -38,6 +41,8 @@ export function SigningPanel() {
   const [loading, setLoading] = useState(true);
   const [error, setError] = useState<string | null>(null);
   const [rotating, setRotating] = useState(false);
+  const [networkOn, setNetworkOn] = useState(false);
+  const [networkSaving, setNetworkSaving] = useState(false);
 
   useEffect(() => {
     let active = true;
@@ -45,12 +50,14 @@ export function SigningPanel() {
       getSigningKey(),
       listSignedRecords().catch(() => []),
       listWalletUpdates().catch(() => []),
+      getNetworkEnabled().catch(() => false),
     ])
-      .then(([k, r, u]) => {
+      .then(([k, r, u, n]) => {
         if (!active) return;
         setKey(k);
         setRecords(r);
         setUpdates(u);
+        setNetworkOn(n);
         setError(null);
       })
       .catch(() => {
@@ -83,6 +90,32 @@ export function SigningPanel() {
     }
   };
 
+  const toggleNetwork = async (next: boolean) => {
+    setNetworkSaving(true);
+    // Optimistic — revert on failure.
+    setNetworkOn(next);
+    try {
+      const saved = await setNetworkEnabled(next);
+      setNetworkOn(saved);
+      notify.success(
+        next
+          ? t("settings.network.joinedTitle")
+          : t("settings.network.leftTitle"),
+        next
+          ? t("settings.network.joinedBody")
+          : t("settings.network.leftBody"),
+      );
+    } catch {
+      setNetworkOn(!next);
+      notify.error(
+        t("settings.network.errorTitle"),
+        t("settings.network.error"),
+      );
+    } finally {
+      setNetworkSaving(false);
+    }
+  };
+
   const recordStatusLabel = (status: SharedRecord["status"]): string =>
     t(
       `settings.signing.records.status${
@@ -137,6 +170,41 @@ export function SigningPanel() {
         </div>
       </SettingsCard>
 
+      <SettingsSection
+        description={t("settings.network.description")}
+        title={t("settings.network.title")}
+      >
+        <SettingsCard className="flex items-center justify-between gap-4 p-5">
+          <div className="min-w-0 space-y-0.5">
+            <div className="flex items-center gap-2">
+              <p className="text-sm font-medium">
+                {t("settings.network.toggleLabel")}
+              </p>
+              <Badge
+                className={cn(
+                  networkOn
+                    ? "bg-emerald-500/15 text-emerald-400"
+                    : "bg-muted text-muted-foreground",
+                )}
+              >
+                {networkOn
+                  ? t("settings.network.statusConnected")
+                  : t("settings.network.statusOff")}
+              </Badge>
+            </div>
+            <p className="text-sm text-muted-foreground">
+              {t("settings.network.toggleDesc")}
+            </p>
+          </div>
+          <Switch
+            aria-label={t("settings.network.toggleLabel")}
+            checked={networkOn}
+            disabled={loading || networkSaving}
+            onCheckedChange={toggleNetwork}
+          />
+        </SettingsCard>
+      </SettingsSection>
+
       <SettingsSection
         description={t("settings.signing.identityDescription")}
         title={t("settings.signing.identityTitle")}

frontend/lib/i18n/locales/ar/translation.json

@@ -1996,6 +1996,20 @@
         "errorTitle": "تعذّر إضافة العضو"
       }
     },
+    "network": {
+      "title": "شبكة Temetro",
+      "description": "يتيح مُرحّل شبكة Temetro لتطبيقات محفظة المرضى الاتصال بعيادتك لمشاركة السجلات والموافقة عليها — مشفّرة من طرف إلى طرف، مع تعريف عيادتك بمفتاح التوقيع الخاص بها.",
+      "toggleLabel": "الانضمام إلى شبكة Temetro",
+      "toggleDesc": "عند التفعيل، تتصل هذه العيادة بالمُرحّل لاستيراد السجلات من تطبيقات المرضى وإرسال التحديثات إلى محافظهم.",
+      "statusConnected": "متصل",
+      "statusOff": "معطّل",
+      "joinedTitle": "تم الانضمام إلى شبكة Temetro",
+      "joinedBody": "يمكن الآن لتطبيقات محفظة المرضى الاتصال بهذه العيادة.",
+      "leftTitle": "تم مغادرة شبكة Temetro",
+      "leftBody": "لم تعد هذه العيادة متصلة بالمُرحّل.",
+      "errorTitle": "تعذّر تحديث الوصول إلى الشبكة",
+      "error": "يرجى المحاولة مرة أخرى."
+    },
     "signing": {
       "keyTitle": "مفتاح التوقيع",
       "active": "نشط",

frontend/lib/i18n/locales/de/translation.json

@@ -1976,6 +1976,20 @@
         "errorTitle": "Mitglied konnte nicht hinzugefügt werden"
       }
     },
+    "network": {
+      "title": "Temetro-Netzwerk",
+      "description": "Das Temetro-Netzwerk-Relay ermöglicht es den Wallet-Apps der Patienten, sich mit Ihrer Praxis zu verbinden, um Akten zu teilen und zu genehmigen — Ende-zu-Ende-verschlüsselt, wobei Ihre Praxis über ihren Signierschlüssel identifiziert wird.",
+      "toggleLabel": "Temetro-Netzwerk beitreten",
+      "toggleDesc": "Wenn aktiviert, verbindet sich diese Praxis mit dem Relay, sodass Sie Akten aus Patienten-Apps importieren und Aktualisierungen an deren Wallets senden können.",
+      "statusConnected": "Verbunden",
+      "statusOff": "Aus",
+      "joinedTitle": "Temetro-Netzwerk beigetreten",
+      "joinedBody": "Wallet-Apps der Patienten können sich jetzt mit dieser Praxis verbinden.",
+      "leftTitle": "Temetro-Netzwerk verlassen",
+      "leftBody": "Diese Praxis ist nicht mehr mit dem Relay verbunden.",
+      "errorTitle": "Netzwerkzugriff konnte nicht aktualisiert werden",
+      "error": "Bitte versuchen Sie es erneut."
+    },
     "signing": {
       "keyTitle": "Signierschlüssel",
       "active": "Aktiv",

frontend/lib/i18n/locales/en/translation.json

@@ -1976,6 +1976,20 @@
         "errorTitle": "Could not add member"
       }
     },
+    "network": {
+      "title": "Temetro Network",
+      "description": "The Temetro Network relay lets patients' wallet apps connect to your clinic to share and approve records — end-to-end encrypted, with your clinic identified by its signing key.",
+      "toggleLabel": "Join Temetro Network",
+      "toggleDesc": "When on, this clinic connects to the relay so you can import records from patient apps and push updates to their wallets.",
+      "statusConnected": "Connected",
+      "statusOff": "Off",
+      "joinedTitle": "Joined the Temetro Network",
+      "joinedBody": "Patient wallet apps can now connect to this clinic.",
+      "leftTitle": "Left the Temetro Network",
+      "leftBody": "This clinic is no longer connected to the relay.",
+      "errorTitle": "Couldn't update network access",
+      "error": "Please try again."
+    },
     "signing": {
       "keyTitle": "Signing key",
       "active": "Active",

frontend/lib/i18n/locales/fr/translation.json

@@ -1976,6 +1976,20 @@
         "errorTitle": "Impossible d'ajouter le membre"
       }
     },
+    "network": {
+      "title": "Réseau Temetro",
+      "description": "Le relais Réseau Temetro permet aux applications portefeuille des patients de se connecter à votre clinique pour partager et approuver des dossiers — chiffrés de bout en bout, votre clinique étant identifiée par sa clé de signature.",
+      "toggleLabel": "Rejoindre le Réseau Temetro",
+      "toggleDesc": "Une fois activé, cette clinique se connecte au relais pour importer des dossiers depuis les applications des patients et envoyer des mises à jour vers leurs portefeuilles.",
+      "statusConnected": "Connecté",
+      "statusOff": "Désactivé",
+      "joinedTitle": "Réseau Temetro rejoint",
+      "joinedBody": "Les applications portefeuille des patients peuvent désormais se connecter à cette clinique.",
+      "leftTitle": "Réseau Temetro quitté",
+      "leftBody": "Cette clinique n'est plus connectée au relais.",
+      "errorTitle": "Impossible de mettre à jour l'accès au réseau",
+      "error": "Veuillez réessayer."
+    },
     "signing": {
       "keyTitle": "Clé de signature",
       "active": "Active",

frontend/lib/i18n/locales/so/translation.json

@@ -1976,6 +1976,20 @@
         "errorTitle": "Xubinta lama ku dari karin"
       }
     },
+    "network": {
+      "title": "Shabakadda Temetro",
+      "description": "Gudbiyaha Shabakadda Temetro wuxuu u oggolaanayaa abaabulka boorsada bukaannada inay ku xidhaan rugtaada si ay u wadaagaan oo u ansixiyaan diiwaannada — sir gaba-gabo ah, iyadoo rugtaada lagu aqoonsado furaheeda saxiixa.",
+      "toggleLabel": "Ku biir Shabakadda Temetro",
+      "toggleDesc": "Marka la shido, rugtan waxay ku xidhmaysaa gudbiyaha si aad u soo dejiso diiwaannada abaabulka bukaannada oo aad cusboonaysiin ugu dirto boorsadooda.",
+      "statusConnected": "La xidhiidhay",
+      "statusOff": "Daminaan",
+      "joinedTitle": "Waxaad ku biirtay Shabakadda Temetro",
+      "joinedBody": "Abaabulka boorsada bukaannada hadda way ku xidhmi karaan rugtan.",
+      "leftTitle": "Waxaad ka baxday Shabakadda Temetro",
+      "leftBody": "Rugtan hadda kuma xidhna gudbiyaha.",
+      "errorTitle": "Lama cusboonaysiin karin gelitaanka shabakadda",
+      "error": "Fadlan isku day mar kale."
+    },
     "signing": {
       "keyTitle": "Furaha saxiixa",
       "active": "Firfircoon",

frontend/lib/signing.ts

@@ -38,3 +38,21 @@ export async function rotateSigningKey(): Promise<SigningKey> {
 export async function listSignedRecords(): Promise<SharedRecord[]> {
   return apiFetch<SharedRecord[]>("/api/signing/records");
 }
+
+// Whether this clinic has joined the Temetro Network relay (patient-wallet
+// sharing rides it). Readable by any clinician.
+export async function getNetworkEnabled(): Promise<boolean> {
+  const { enabled } = await apiFetch<{ enabled: boolean }>(
+    "/api/signing/network",
+  );
+  return enabled;
+}
+
+// Join or leave the Temetro Network (owner/admin only). Returns the new state.
+export async function setNetworkEnabled(enabled: boolean): Promise<boolean> {
+  const res = await apiFetch<{ enabled: boolean }>("/api/signing/network", {
+    method: "PUT",
+    body: JSON.stringify({ enabled }),
+  });
+  return res.enabled;
+}

frontend/package.json

@@ -1,6 +1,6 @@
 {
   "name": "frontend",
-  "version": "0.7.0",
+  "version": "0.8.0",
   "private": true,
   "scripts": {
     "dev": "next dev",