feat(controller): add inline remap modal with descriptor-based bindings (#21)

src/main/controller-config-update.test.ts

@@ -0,0 +1,54 @@
+import assert from 'node:assert/strict';
+import test from 'node:test';
+
+import { applyControllerConfigUpdate } from './controller-config-update.js';
+
+test('applyControllerConfigUpdate replaces binding descriptors instead of deep-merging them', () => {
+  const next = applyControllerConfigUpdate(
+    {
+      preferredGamepadId: 'pad-1',
+      bindings: {
+        toggleLookup: { kind: 'axis', axisIndex: 4, direction: 'positive' },
+        closeLookup: { kind: 'button', buttonIndex: 1 },
+      },
+    },
+    {
+      bindings: {
+        toggleLookup: { kind: 'button', buttonIndex: 11 },
+      },
+    },
+  );
+
+  assert.deepEqual(next.bindings?.toggleLookup, { kind: 'button', buttonIndex: 11 });
+  assert.deepEqual(next.bindings?.closeLookup, { kind: 'button', buttonIndex: 1 });
+});
+
+test('applyControllerConfigUpdate merges buttonIndices while replacing only updated binding leaves', () => {
+  const next = applyControllerConfigUpdate(
+    {
+      buttonIndices: {
+        select: 6,
+        buttonSouth: 0,
+      },
+      bindings: {
+        toggleLookup: { kind: 'button', buttonIndex: 0 },
+        closeLookup: { kind: 'button', buttonIndex: 1 },
+      },
+    },
+    {
+      buttonIndices: {
+        buttonSouth: 9,
+      },
+      bindings: {
+        closeLookup: { kind: 'none' },
+      },
+    },
+  );
+
+  assert.deepEqual(next.buttonIndices, {
+    select: 6,
+    buttonSouth: 9,
+  });
+  assert.deepEqual(next.bindings?.toggleLookup, { kind: 'button', buttonIndex: 0 });
+  assert.deepEqual(next.bindings?.closeLookup, { kind: 'none' });
+});