fix(terminal): distinguish IME Process keys from Enter

Adapted from #11273 commits c690ee609, 506524085, and cc69fa7bf.

src/renderer/src/components/terminal-pane/terminal-ime-deferred-newline.test.ts

@@ -325,6 +325,7 @@ describe('isTerminalImeProcessEnter', () => {
   const event = (overrides: Partial<KeyboardEvent> = {}) =>
     ({
       key: 'Process',
+      code: 'Enter',
       keyCode: 229,
       metaKey: false,
       ctrlKey: false,
@@ -333,19 +334,24 @@ describe('isTerminalImeProcessEnter', () => {
       ...overrides
     }) as KeyboardEvent
 
-  it.each([{ shiftKey: true }, { shiftKey: false, ctrlKey: true }])(
-    'recognizes a Windows IME modifier Enter reported as Process',
-    (modifiers) => {
-      expect(isTerminalImeProcessEnter(event(modifiers))).toBe(true)
-    }
-  )
+  it.each([
+    { shiftKey: true },
+    { shiftKey: false, ctrlKey: true },
+    { code: 'NumpadEnter' },
+    { code: '' },
+    { code: 'Unidentified' }
+  ])('recognizes a Windows IME modifier Enter reported as Process', (modifiers) => {
+    expect(isTerminalImeProcessEnter(event(modifiers))).toBe(true)
+  })
 
   it.each([
     { key: 'Enter' },
     { keyCode: 13 },
     { shiftKey: false },
     { ctrlKey: true },
-    { altKey: true }
+    { altKey: true },
+    { code: 'KeyQ' },
+    { code: 'ArrowLeft' }
   ])('rejects a non-IME or ambiguous Process key', (override) => {
     expect(isTerminalImeProcessEnter(event(override))).toBe(false)
   })

src/renderer/src/components/terminal-pane/terminal-ime-deferred-newline.ts

@@ -107,11 +107,16 @@ export function getTerminalImeModifiedEnterKind(
 }
 
 export function isTerminalImeProcessEnter(
-  event: Pick<KeyboardEvent, 'key' | 'keyCode' | 'metaKey' | 'ctrlKey' | 'altKey' | 'shiftKey'>
+  event: Pick<
+    KeyboardEvent,
+    'key' | 'code' | 'keyCode' | 'metaKey' | 'ctrlKey' | 'altKey' | 'shiftKey'
+  >
 ): boolean {
+  const { code } = event
   return (
     event.key === 'Process' &&
     event.keyCode === 229 &&
+    (!code || code === 'Unidentified' || code === 'Enter' || code === 'NumpadEnter') &&
     getTerminalImeModifiedEnterKind(event) !== null
   )
 }