fix(mobile): opening another stack layer no longer shows the previous PR

apps/mobile/src/features/pull-requests/PullRequestStackCard.tsx

@@ -4,6 +4,7 @@ import { Platform, View } from "react-native";
 import { useAndroidWorkspaceSelection } from "../workspace/useAndroidWorkspaceSelection";
 import { AppText as Text } from "../../components/ui/AppText";
 import { PullRequestCardGroup, PullRequestCardRow } from "./PullRequestControls";
+import { pullRequestLayerParams } from "./pullRequestStack";
 import { pullRequestStatus } from "./pullRequestStatus";
 import type { PullRequestParams } from "./usePullRequestDiff";
 import type { PullRequestStackState } from "./usePullRequestStack";
@@ -66,7 +67,7 @@ export function PullRequestStackCard(props: {
                     selected
                       ? undefined
                       : () => {
-                          const params = { ...props.params, number: layer.number };
+                          const params = pullRequestLayerParams(props.params, layer.number);
                           if (Platform.OS === "android")
                             selectAndroidWorkspace({ name: "PullRequest", params });
                           else navigation.dispatch(StackActions.push("PullRequest", params));

apps/mobile/src/features/pull-requests/pullRequestStack.test.ts

@@ -2,6 +2,7 @@ import { sourceControlClients } from "@t3tools/client-runtime/source-control-cli
 import { ProjectId, type PullRequestStack, type ThreadPullRequestLink } from "@t3tools/contracts";
 import { describe, expect, it } from "vite-plus/test";
 import {
+  pullRequestLayerParams,
   pullRequestStackMerge,
   savedPullRequestStack,
   singlePullRequestMergeAllowed,
@@ -124,6 +125,26 @@ describe("mobile stack merge scope", () => {
   });
 });
 
+describe("mobile stack layer navigation", () => {
+  it("opens another layer without the summary of the layer it came from", () => {
+    const route = {
+      environmentId: "environment",
+      projectId: "project",
+      repository: "acme/web",
+      host: "github.com",
+      number: 2,
+      initialSummary: { number: 2, url: "https://github.com/acme/web/pull/2" },
+    };
+    expect(pullRequestLayerParams(route, 3)).toEqual({
+      environmentId: "environment",
+      projectId: "project",
+      repository: "acme/web",
+      host: "github.com",
+      number: 3,
+    });
+  });
+});
+
 describe("mobile saved stack navigation", () => {
   it("keeps all saved layers and enriches titles without carrying action revisions", () => {
     const saved = savedPullRequestStack([link], reference);

apps/mobile/src/features/pull-requests/pullRequestStack.ts

@@ -67,6 +67,15 @@ export function savedPullRequestStack(
   };
 }
 
+/** The list summary describes the layer it was opened from, so another layer's route drops it. */
+export function pullRequestLayerParams<Params extends { readonly initialSummary?: unknown }>(
+  params: Params,
+  number: number,
+) {
+  const { initialSummary: _, ...layer } = params;
+  return { ...layer, number };
+}
+
 export function singlePullRequestMergeAllowed(input: {
   readonly supportsStackActions: boolean;
   readonly hasStack: boolean;