feat(tip): add selectable coffee gift tiers

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

@@ -32,28 +32,8 @@ describe("external entry navigation", () => {
     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");
+  it("routes every tip entry to the tier selection page", () => {
+    expect(resolveExternalEntryDestination({ target: "tip" })).toBe("/tip");
   });
 });