Wrapped URLs not recognized correctly with tmux split panes

[liununu]

Issue Description

When using tmux with multiple split panes in Ghostty, long URLs that wrap to multiple lines are not recognized
correctly as clickable links. The terminal only detects the first line of the wrapped URL as clickable, rather than
treating the entire URL as a single link.

Example

echo 'https://github.com/ghostty-org/ghostty/blob/main/CONTRIBUTING.md'

• Line 1: https://github.com/ghostty-org/ghost, only this part is detected as clickable link
• Line 2: ty/blob/main/CONTRIBUTING.md

---

Additional observations

• This happens with any URL that wraps across lines
• Works correctly in Ghostty without tmux
• Works correctly in Ghostty with tmux, without split panes
• Works correctly in iTerm2 with tmux and split panes

Expected Behavior

The full URL https://github.com/ghostty-org/ghostty/blob/main/CONTRIBUTING.md should be recognized and clickable as
a single link, even when it wraps across multiple lines in a tmux split pane.

Actual Behavior

Only the first line of the wrapped URL (https://github.com/ghostty-org/ghost) is recognized as clickable. The
continuation on the second line (ty/blob/main/CONTRIBUTING.md) is not detected as part of the link and cannot be
clicked.

Reproduction Steps

1. Open Ghostty with tmux
2. Split Window with multiple vertical panes
3. In one of the panes, run: echo 'https://github.com/ghostty-org/ghostty/blob/main/CONTRIBUTING.md'
4. Observe that the URL wraps to two lines
5. Press ⌘ + ⇧ and hover or attempt to click the URL
6. Notice only the first line is recognized as a clickable link

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 26.1

(Linux only) Display Server

None

(Linux only) Desktop Environment/Window Manager

No response

Minimal Ghostty Configuration

theme = Dracula+
copy-on-select = clipboard
keybind = shift+enter=text:\n

Additional Relevant Configuration

tmux 3.5a, no special tmux configuration (default settings).

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.

[pluiedev]

Dupe of #9108