feat(FN-3403): add shell multi-profile support with connection manager onbo

Merges shell multi-profile support for desktop (FN-3403) — spanning new connection-manager flows, shell onboarding interoperability, mobile connection profiles, desktop IPC/shell-settings plumbing, and tokenized titlebar styles — with a secondary migration of the WhatsApp plugin to the Baileys pairi

Fusion-Task-Id: FN-3403

packages/dashboard/app/utils/__tests__/shell-connection-settings.test.ts

@@ -0,0 +1,51 @@
+import { describe, expect, it, vi } from "vitest";
+import {
+  createOrUpdateProfile,
+  DEFAULT_WEB_SHELL_STATE,
+  deleteProfile,
+  normalizeShellState,
+  selectActiveProfile,
+} from "../shell-connection-settings";
+
+describe("shell-connection-settings", () => {
+  it("normalizes missing active profile to null", () => {
+    const state = normalizeShellState({
+      host: "mobile-shell",
+      activeProfileId: "missing",
+      profiles: [{ id: "p1", name: "Prod", serverUrl: "https://fusion.example.com", createdAt: "", updatedAt: "" }],
+    });
+
+    expect(state.activeProfileId).toBeNull();
+    expect(state.profiles).toHaveLength(1);
+  });
+
+  it("returns web fallback for empty shell state", () => {
+    expect(normalizeShellState(undefined)).toEqual(DEFAULT_WEB_SHELL_STATE);
+  });
+
+  it("throws unsupported errors in browser mode", async () => {
+    await expect(createOrUpdateProfile(null, { name: "Prod", serverUrl: "https://fusion.example.com" })).rejects.toThrow(
+      "Saving connection profiles is only available in native shell mode",
+    );
+    await expect(deleteProfile(null, "p1")).rejects.toThrow("Deleting connection profiles is only available in native shell mode");
+    await expect(selectActiveProfile(null, "p1")).rejects.toThrow(
+      "Switching connection profiles is only available in native shell mode",
+    );
+  });
+
+  it("delegates profile actions to shell API", async () => {
+    const shellApi = {
+      saveProfile: vi.fn(async () => ({ id: "p1", name: "Prod", serverUrl: "https://fusion.example.com", createdAt: "", updatedAt: "" })),
+      deleteProfile: vi.fn(async () => undefined),
+      setActiveProfile: vi.fn(async () => ({ host: "mobile-shell", activeProfileId: "p1", profiles: [] })),
+    } as const;
+
+    await createOrUpdateProfile(shellApi as never, { name: "Prod", serverUrl: "https://fusion.example.com" });
+    await deleteProfile(shellApi as never, "p1");
+    await selectActiveProfile(shellApi as never, "p1");
+
+    expect(shellApi.saveProfile).toHaveBeenCalled();
+    expect(shellApi.deleteProfile).toHaveBeenCalledWith("p1");
+    expect(shellApi.setActiveProfile).toHaveBeenCalledWith("p1");
+  });
+});