feat(tip): support tiered coffee gifts

src/lib/navigation/__tests__/external_entry.test.ts

@@ -3,6 +3,7 @@ import { describe, expect, it } from "vitest";
 import { ROUTES } from "@/router/routes";
 
 import {
+  resolveExternalEntryDestination,
   resolveExternalEntryPromotionType,
   resolveExternalEntryTarget,
   shouldBindExternalFacebookIdentity,
@@ -30,6 +31,30 @@ describe("external entry navigation", () => {
     expect(resolveExternalEntryTarget({ target: "/tip" })).toBe(ROUTES.chat);
     expect(resolveExternalEntryTarget({ target: "sidebar" })).toBe(ROUTES.chat);
   });
+
+  it("routes tip entries to the requested coffee type", () => {
+    expect(
+      resolveExternalEntryDestination({
+        target: "tip",
+        coffeeType: "medium",
+      }),
+    ).toBe("/tip?coffee_type=medium");
+    expect(
+      resolveExternalEntryDestination({
+        target: "tip",
+        coffeeType: "large",
+      }),
+    ).toBe("/tip?coffee_type=large");
+  });
+
+  it("defaults invalid tip coffee types to small", () => {
+    expect(
+      resolveExternalEntryDestination({
+        target: "tip",
+        coffeeType: "unknown",
+      }),
+    ).toBe("/tip?coffee_type=small");
+  });
 });
 
 describe("external entry facebook identity binding", () => {