fix(app): retain Explorer tab state

packages/app/src/hooks/keyboard-shift-policy.ts

@@ -1,5 +1,12 @@
 export const DEFAULT_IOS_KEYBOARD_INSET_MIN_HEIGHT = 120;
 
+export function shouldUseCompactExplorerKeyboardPadding(input: {
+  isGit: boolean;
+  explorerTab: "changes" | "files" | "pr";
+}): boolean {
+  return !input.isGit || input.explorerTab !== "changes";
+}
+
 export function resolveKeyboardShift(input: {
   rawKeyboardHeight: number;
   keyboardProgress: number;

packages/app/src/hooks/use-keyboard-shift-style.test.ts

@@ -1,5 +1,8 @@
 import { describe, expect, it } from "vitest";
-import { resolveKeyboardShift } from "./keyboard-shift-policy";
+import {
+  resolveKeyboardShift,
+  shouldUseCompactExplorerKeyboardPadding,
+} from "./keyboard-shift-policy";
 
 describe("resolveKeyboardShift", () => {
   it("keeps the existing open-keyboard offset behavior", () => {
@@ -38,3 +41,17 @@ describe("resolveKeyboardShift", () => {
     ).toBe(0);
   });
 });
+
+describe("shouldUseCompactExplorerKeyboardPadding", () => {
+  it("keeps the changes viewport stable while preserving padding for other tabs", () => {
+    expect(shouldUseCompactExplorerKeyboardPadding({ isGit: true, explorerTab: "changes" })).toBe(
+      false,
+    );
+    expect(shouldUseCompactExplorerKeyboardPadding({ isGit: true, explorerTab: "files" })).toBe(
+      true,
+    );
+    expect(shouldUseCompactExplorerKeyboardPadding({ isGit: false, explorerTab: "changes" })).toBe(
+      true,
+    );
+  });
+});