fix: xterm.js link handling - OSC 8 hyperlinks and plain-text URL click detection

- OSC 8 hyperlinks (ESC]8;;URL sequences from ls --hyperlink, gcc, grep) now open directly in new tabs instead of showing confirm() dialog
- WebLinksAddon plain-text URL detection now opens on plain click instead of requiring Ctrl/Cmd+Click
- Matches Ghostty/iTerm2 behavior for terminal link handling in browser-based terminal

Generated with [Amplifier](https://github.com/microsoft/amplifier)

Co-Authored-By: Amplifier <240397093+microsoft-amplifier@users.noreply.github.com>

muxplex/frontend/terminal.js

@@ -287,20 +287,37 @@ function createTerminal(fontSize) {
     },
     scrollback: mobile ? 500 : 5000,
     allowProposedApi: true,
+    // Override OSC 8 hyperlink handler — the default shows a confirm() dialog.
+    // This opens links directly, matching native terminal behavior (Ghostty, iTerm2).
+    linkHandler: {
+      activate: function(event, uri) {
+        window.open(uri, '_blank');
+      },
+    },
   });
 
   _fitAddon = new window.FitAddon.FitAddon();
   _term.loadAddon(_fitAddon);
 
-  // Clickable URLs — Ctrl+Click (Windows/Linux) or Cmd+Click (macOS) opens in new tab.
-  // xterm-addon-web-links auto-detects URLs and adds hover underlines.
-  // Plain click is preserved for normal terminal text selection.
+  // --- Link handling ---
+  // Two link systems work together:
+  //
+  // 1. WebLinksAddon: regex-detects plain-text URLs (http://..., https://...)
+  //    and makes them clickable. Click opens in new tab.
+  //
+  // 2. OSC 8 hyperlinks: programs emit ESC]8;;URL\atext\aESC]8;;\a to make
+  //    arbitrary text clickable (like Ghostty, iTerm2, etc.). xterm.js has
+  //    built-in OscLinkProvider support, but its default handler shows a
+  //    confirm() dialog. We override with a linkHandler that opens directly.
+  //
+  // Both open on plain click. Ctrl/Cmd+Click is not required — this is a
+  // browser-based terminal where the link-vs-select distinction comes from
+  // whether the user drags (select) or clicks (link).
+
   var WebLinksAddon = window.WebLinksAddon && window.WebLinksAddon.WebLinksAddon;
   if (WebLinksAddon) {
     _term.loadAddon(new WebLinksAddon(function(event, uri) {
-      if (event.ctrlKey || event.metaKey) {
-        window.open(uri, '_blank');
-      }
+      window.open(uri, '_blank');
     }));
   }