Discovery: wide-area bridge DNS-SD

# Conflicts:
#	apps/ios/Sources/Bridge/BridgeDiscoveryModel.swift
#	src/cli/dns-cli.ts

src/infra/bridge/server.test.ts

@@ -225,6 +225,8 @@ describe("node bridge server", () => {
       displayName?: string;
       platform?: string;
       version?: string;
+      deviceFamily?: string;
+      modelIdentifier?: string;
       remoteIp?: string;
     } | null = null;
 
@@ -233,6 +235,8 @@ describe("node bridge server", () => {
       displayName?: string;
       platform?: string;
       version?: string;
+      deviceFamily?: string;
+      modelIdentifier?: string;
       remoteIp?: string;
     } | null = null;
 
@@ -262,6 +266,8 @@ describe("node bridge server", () => {
       displayName: "Iris",
       platform: "ios",
       version: "1.0",
+      deviceFamily: "iPad",
+      modelIdentifier: "iPad16,6",
     });
 
     // Approve the pending request from the gateway side.
@@ -296,6 +302,8 @@ describe("node bridge server", () => {
       displayName: "Different name",
       platform: "ios",
       version: "2.0",
+      deviceFamily: "iPad",
+      modelIdentifier: "iPad99,1",
     });
     const line3 = JSON.parse(await readLine2()) as { type: string };
     expect(line3.type).toBe("hello-ok");
@@ -310,6 +318,8 @@ describe("node bridge server", () => {
     expect(lastAuthed?.displayName).toBe("Iris");
     expect(lastAuthed?.platform).toBe("ios");
     expect(lastAuthed?.version).toBe("1.0");
+    expect(lastAuthed?.deviceFamily).toBe("iPad");
+    expect(lastAuthed?.modelIdentifier).toBe("iPad16,6");
     expect(lastAuthed?.remoteIp?.includes("127.0.0.1")).toBe(true);
 
     socket2.destroy();

src/infra/bridge/server.ts

@@ -17,6 +17,8 @@ type BridgeHelloFrame = {
   token?: string;
   platform?: string;
   version?: string;
+  deviceFamily?: string;
+  modelIdentifier?: string;
 };
 
 type BridgePairRequestFrame = {
@@ -25,6 +27,8 @@ type BridgePairRequestFrame = {
   displayName?: string;
   platform?: string;
   version?: string;
+  deviceFamily?: string;
+  modelIdentifier?: string;
   remoteAddress?: string;
 };
 
@@ -108,6 +112,8 @@ export type NodeBridgeClientInfo = {
   displayName?: string;
   platform?: string;
   version?: string;
+  deviceFamily?: string;
+  modelIdentifier?: string;
   remoteIp?: string;
 };
 
@@ -263,6 +269,8 @@ export async function startNodeBridgeServer(
         displayName: verified.node.displayName ?? hello.displayName,
         platform: verified.node.platform ?? hello.platform,
         version: verified.node.version ?? hello.version,
+        deviceFamily: verified.node.deviceFamily ?? hello.deviceFamily,
+        modelIdentifier: verified.node.modelIdentifier ?? hello.modelIdentifier,
         remoteIp: remoteAddress,
       };
       connections.set(nodeId, { socket, nodeInfo, invokeWaiters });
@@ -319,6 +327,8 @@ export async function startNodeBridgeServer(
           displayName: req.displayName,
           platform: req.platform,
           version: req.version,
+          deviceFamily: req.deviceFamily,
+          modelIdentifier: req.modelIdentifier,
           remoteIp: remoteAddress,
         },
         opts.pairingBaseDir,
@@ -347,6 +357,8 @@ export async function startNodeBridgeServer(
         displayName: req.displayName,
         platform: req.platform,
         version: req.version,
+        deviceFamily: req.deviceFamily,
+        modelIdentifier: req.modelIdentifier,
         remoteIp: remoteAddress,
       };
       connections.set(nodeId, { socket, nodeInfo, invokeWaiters });

src/infra/node-pairing.ts

@@ -9,6 +9,8 @@ export type NodePairingPendingRequest = {
   displayName?: string;
   platform?: string;
   version?: string;
+  deviceFamily?: string;
+  modelIdentifier?: string;
   remoteIp?: string;
   isRepair?: boolean;
   ts: number;
@@ -20,6 +22,8 @@ export type NodePairingPairedNode = {
   displayName?: string;
   platform?: string;
   version?: string;
+  deviceFamily?: string;
+  modelIdentifier?: string;
   remoteIp?: string;
   createdAtMs: number;
   approvedAtMs: number;
@@ -172,6 +176,8 @@ export async function requestNodePairing(
       displayName: req.displayName,
       platform: req.platform,
       version: req.version,
+      deviceFamily: req.deviceFamily,
+      modelIdentifier: req.modelIdentifier,
       remoteIp: req.remoteIp,
       isRepair,
       ts: Date.now(),
@@ -199,6 +205,8 @@ export async function approveNodePairing(
       displayName: pending.displayName,
       platform: pending.platform,
       version: pending.version,
+      deviceFamily: pending.deviceFamily,
+      modelIdentifier: pending.modelIdentifier,
       remoteIp: pending.remoteIp,
       createdAtMs: existing?.createdAtMs ?? now,
       approvedAtMs: now,

src/infra/system-presence.ts

@@ -5,6 +5,8 @@ export type SystemPresence = {
   ip?: string;
   version?: string;
   platform?: string;
+  deviceFamily?: string;
+  modelIdentifier?: string;
   lastInputSeconds?: number;
   mode?: string;
   reason?: string;
@@ -54,12 +56,20 @@ function initSelfPresence() {
     if (p === "win32") return `windows ${rel}`;
     return `${p} ${rel}`;
   })();
+  const deviceFamily = (() => {
+    const p = os.platform();
+    if (p === "darwin") return "Mac";
+    if (p === "win32") return "Windows";
+    if (p === "linux") return "Linux";
+    return p;
+  })();
   const text = `Gateway: ${host}${ip ? ` (${ip})` : ""} · app ${version} · mode gateway · reason self`;
   const selfEntry: SystemPresence = {
     host,
     ip,
     version,
     platform,
+    deviceFamily,
     mode: "gateway",
     reason: "self",
     text,
@@ -123,6 +133,8 @@ type SystemPresencePayload = {
   ip?: string;
   version?: string;
   platform?: string;
+  deviceFamily?: string;
+  modelIdentifier?: string;
   lastInputSeconds?: number;
   mode?: string;
   reason?: string;
@@ -147,6 +159,8 @@ export function updateSystemPresence(payload: SystemPresencePayload) {
     ip: payload.ip ?? parsed.ip ?? existing.ip,
     version: payload.version ?? parsed.version ?? existing.version,
     platform: payload.platform ?? existing.platform,
+    deviceFamily: payload.deviceFamily ?? existing.deviceFamily,
+    modelIdentifier: payload.modelIdentifier ?? existing.modelIdentifier,
     mode: payload.mode ?? parsed.mode ?? existing.mode,
     lastInputSeconds:
       payload.lastInputSeconds ??