⌘ delete and others not working as expected

[willlma]

Issue Description

I like Ghostty because of its promise to have a "platform-native UI". I can use the usual text navigation shortcuts I'm used to in other apps instead of memorizing emacs shortcuts. Here are some discrepancies I've noted between the behavior in Ghostty vs other editors. Let's say I have the text "hello/world"

• If the cursor is at the end of the line and I press option + delete, I'm left with no text. On other apps, I'm left with "hello/"
• If the cursor is immediately to the right of the the slash ("hello/|world") and I press command + delete, I'm left with no text. On other apps, it deletes from the cursor position to the beginning of the line: I'm left with "world"
• If the cursor is immediately to the right of the the slash ("hello/|world") and I press fn + command + delete, I'm left with "hello/9~world". On other apps, it deletes from the cursor position to the end of the line: I'm left with "hello/"

Somewhat related to #3142

Expected Behavior

I would expect text-based keyboard shortcuts for navigating and editing text to be similar to other applications on mac.

Actual Behavior

Ghostty has its own behavior as described above.

Reproduction Steps

1. Open Ghostty
2. Type "hello/world"
3. Press left arrow 5 times
4. Press command+delete

See image of key log for this flow in the description above

Ghostty Logs

No response

Ghostty Version

Ghostty 1.2.3

Version
  - version: 1.2.3
  - channel: stable
Build Config
  - Zig version   : 0.14.1
  - build mode    : builtin.OptimizeMode.ReleaseFast
  - app runtime   : apprt.Runtime.none
  - font engine   : font.main.Backend.coretext
  - renderer      : renderer.generic.Renderer(renderer.Metal)
  - libxev        : kqueue

OS Version Information

MacOS 15.7.1 (24G231)

(Linux only) Display Server

None

(Linux only) Desktop Environment/Window Manager

No response

Minimal Ghostty Configuration

Reproduced with empty config file

Additional Relevant Configuration

No response

I acknowledge that:

• I have reviewed the FAQ and confirm that my issue is NOT among them.
• I have searched the Ghostty repository (both open and closed Discussions and Issues) and confirm this is not a duplicate of an existing issue or discussion.
• I have checked the "Preview" tab on all text fields to ensure that everything looks right, and have wrapped all configuration and code in code blocks with a group of three backticks (```) on separate lines.