fix(sdk/nodes): seed self-node stub from MyNodeInfo

If a session's config bundle doesn't include a NodeInfo for the device
itself (fresh flash, cleared nodeDB, some firmware builds), the web
sidebar's `useMyNodeAsProto()` selector — which does
`nodes.list.find(n => n.num === myNodeNum)` — never resolves and the
"loading" spinner sticks indefinitely after the overlay closes.

NodesClient now subscribes to onMyNodeInfo. If no entry exists for the
incoming myNodeNum, it seeds a stub Node with just `num` set; subsequent
NodeInfo / UserPacket / PositionPacket events patch real data on top.
Guards against myNodeNum === 0 and against overwriting an existing entry.

DeviceInfoPanel already wraps user-dependent rendering in `{user && …}`,
so no app-layer change is needed — the panel quietly omits the avatar
block until a real UserPacket arrives.

Tests cover: stub seeded when only MyNodeInfo arrives, real NodeInfo wins
over a later MyNodeInfo, real NodeInfo patches over an existing stub, and
myNodeNum=0 is ignored.

packages/sdk/src/features/nodes/NodesClient.test.ts

@@ -25,4 +25,57 @@ describe("NodesClient", () => {
     const client = new MeshClient({ transport });
     expect(client.nodes.byNum(999)).toBeUndefined();
   });
+
+  it("seeds a self-node stub from onMyNodeInfo when no NodeInfo has arrived", () => {
+    const { transport } = createFakeTransport();
+    const client = new MeshClient({ transport });
+
+    client.events.onMyNodeInfo.dispatch(create(Protobuf.Mesh.MyNodeInfoSchema, { myNodeNum: 42 }));
+
+    const seeded = client.nodes.byNum(42);
+    expect(seeded).toBeDefined();
+    expect(seeded?.num).toBe(42);
+    expect(seeded?.user).toBeUndefined();
+    expect(seeded?.isFavorite).toBe(false);
+    expect(seeded?.isIgnored).toBe(false);
+  });
+
+  it("does not overwrite a richer NodeInfo entry with a later MyNodeInfo seed", () => {
+    const { transport } = createFakeTransport();
+    const client = new MeshClient({ transport });
+
+    client.events.onNodeInfoPacket.dispatch(
+      create(Protobuf.Mesh.NodeInfoSchema, {
+        num: 42,
+        user: create(Protobuf.Mesh.UserSchema, { id: "!000a", longName: "Alice" }),
+      }),
+    );
+    client.events.onMyNodeInfo.dispatch(create(Protobuf.Mesh.MyNodeInfoSchema, { myNodeNum: 42 }));
+
+    const node = client.nodes.byNum(42);
+    expect(node?.user?.longName).toBe("Alice");
+  });
+
+  it("lets a real NodeInfo patch over a seeded self-node stub", () => {
+    const { transport } = createFakeTransport();
+    const client = new MeshClient({ transport });
+
+    client.events.onMyNodeInfo.dispatch(create(Protobuf.Mesh.MyNodeInfoSchema, { myNodeNum: 42 }));
+    client.events.onNodeInfoPacket.dispatch(
+      create(Protobuf.Mesh.NodeInfoSchema, {
+        num: 42,
+        user: create(Protobuf.Mesh.UserSchema, { id: "!000a", longName: "Alice" }),
+      }),
+    );
+
+    const node = client.nodes.byNum(42);
+    expect(node?.user?.longName).toBe("Alice");
+  });
+
+  it("ignores onMyNodeInfo with myNodeNum=0", () => {
+    const { transport } = createFakeTransport();
+    const client = new MeshClient({ transport });
+    client.events.onMyNodeInfo.dispatch(create(Protobuf.Mesh.MyNodeInfoSchema, { myNodeNum: 0 }));
+    expect(client.nodes.list.value).toEqual([]);
+  });
 });

packages/sdk/src/features/nodes/NodesClient.ts

@@ -44,6 +44,25 @@ export class NodesClient {
 
     client.events.onNodeInfoPacket.subscribe((info) => this.handleIncoming(info));
 
+    // Seed a self-node stub from MyNodeInfo. Firmware always emits MyNodeInfo
+    // during the wantConfigId handshake, but not every session includes a
+    // NodeInfo for the device itself in the config bundle (fresh flash,
+    // cleared nodeDB, etc.). Without this seed, consumers that look up
+    // `nodes.list.find(n => n.num === myNodeNum)` — notably the web sidebar —
+    // sit empty forever. The real NodeInfo / UserPacket / PositionPacket
+    // handlers above patch the stub when they arrive.
+    client.events.onMyNodeInfo.subscribe((info) => {
+      if (info.myNodeNum === 0) return;
+      if (this.store.has(info.myNodeNum)) return;
+      const seeded: Node = {
+        num: info.myNodeNum,
+        isFavorite: false,
+        isIgnored: false,
+      };
+      this.store.set(info.myNodeNum, seeded);
+      void this.repository.upsert(seeded).catch(() => {});
+    });
+
     client.events.onUserPacket.subscribe((packet) => {
       this.patch(packet.from, { user: packet.data });
     });