Feature request: Cmd-click to open local file paths in panes (Semantic History)

[lichen782]

What

Cmd-click on local file paths inside Herdr panes does not open the file in an editor or Finder, even though Cmd-click on http:///https:// URLs works correctly since #307.

In iTerm2 without Herdr, Cmd-clicking a file path like src/main/java/App.java or /Users/me/project/README.md opens the file in the configured editor (Semantic History). After switching to Herdr, this capability is lost because the outer terminal can no longer detect file paths in Herdr's rendered output.

Current behavior

Target	Cmd-click result
https://github.com/...	Opens in browser (works)
src/main/java/App.java	Nothing happens
./README.md	Nothing happens
/absolute/path/to/file.ts:42	Nothing happens

Expected behavior

Cmd-click on a visible local file path opens the file in the user's configured editor or system default handler, similar to how URL clicks already work. Ideally this would support:

• Absolute paths (/Users/me/project/file.ts)
• Relative paths resolved against the pane's working directory (src/app.ts, ./README.md)
• Paths with line numbers (file.ts:42, file.ts:42:10)

Context

Terminal multiplexers sit between the shell and the host terminal, so host-level features like iTerm2 Semantic History cannot detect file paths in the multiplexer's rendered output. Since Herdr already implements its own Cmd-click URL detection (#307), extending the same mechanism to recognize file paths would restore this workflow without requiring mouse_capture = false.

Looking at the source, safe_web_url in src/app/actions.rs:1679 currently gates clicks to http:///https:// only, and url_at_pane_cell only extracts URL-shaped text. The pane's working directory is already available via foreground_cwd (#345), so resolving relative paths should be feasible.

This is a common pain point for developers who use Cmd-click heavily to navigate compiler errors, test failures, and grep output.

Environment

• Herdr 0.6.10, macOS, iTerm2 as host terminal

[JeongJuhyeon]

The latest frontier models (two most popular ones) are giving these local file links much more often than other models so it's becoming more painful that this doesn't work in Herdr.